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Nervous about the "real" world

- by Randy

I am currently majoring in Computer Science and minoring in mathematics (the minor is embedded in the major). The program has a strong C++ curriculum. We have done some UNIX and assembly language (not fun) and there is C and Java on the way in future classes that I must take. The program I am in did not use the STL, but rather a STL-ish design that was created from the ground up for the program. From what I have read on, the STL and what I have taken are very similar but what I used seemed more user friendly. Some of the programs that I had to write in C++ for assignments include: a password server that utilized hashing of the passwords for security purposes, a router simulator that used a hash table and maps, a maze solver that used depth first search, a tree traveler program that traversed a tree using levelorder, postorder, inorder, selection sort, insertion sort, bit sort, radix sort, merge sort, heap sort, quick sort, topological sort, stacks, queues, priority queues, and my least favorite, red-black trees. All of this was done in three semesters which was just enough time to code them up and turn them in. That being said, if I was told to use a stack to convert an equation to infix notation or something, I would be lost for a few hours. My main concern in writing this is when I graduate and land an interview, what are some of the questions posed to assess my skills? What are some of the most important areas of computer science that are prevalent in the field? I am currently trying to get some ideas of programs I can write in C++ that interest and challenge me to keep learning the language. A sodoku solver came to mind but am lost as to where to start. I apologize for the rant, but I'm just a wee bit nervous about the future. Any tips are appreciated.

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Entity Framework & Transactions

- by Sudheer Kumar

There are many instances we might have to use transactions to maintain data consistency. With Entity Framework, it is a little different conceptually. Case 1 – Transaction b/w multiple SaveChanges(): here if you just use a transaction scope, then Entity Framework (EF) will use distributed transactions instead of local transactions. The reason is that, EF closes and opens the connection when ever required only, which means, it used 2 different connections for different SaveChanges() calls. To resolve this, use the following method. Here we are opening a connection explicitly so as not to span across multipel connections. using (TransactionScope ts = new TransactionScope()) { context.Connection.Open(); //Operation1 : context.SaveChanges(); //Operation2 : context.SaveChanges() //At the end close the connection ts.Complete(); } catch (Exception ex) { //Handle Exception } finally { if (context.Connection.State == ConnectionState.Open) { context.Connection.Close(); } } Case 2 – Transaction between DB & Non-DB operations: For example, assume that you have a table that keeps track of Emails to be sent. Here you want to update certain details like DataSent once if the mail was successfully sent by the e-mail client. Email eml = GetEmailToSend(); eml.DateSent = DateTime.Now; using (TransactionScope ts = new TransactionScope()) { //Update DB context.saveChanges(); //if update is successful, send the email using smtp client smtpClient.Send(); //if send was successful, then commit ts.Complete(); } Here since you are dealing with a single context.SaveChanges(), you just need to use the TransactionScope, just before saving the context only. Hope this was helpful!

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Podcast Show Notes: Fear and Loathing in SOA

- by Bob Rhubart

The latest program (#47) in the Arch2Arch podcast series is the first of three segments from another virtual mini-meet-up with architects from the OTN community, recorded on March 9, 2010. In keeping with the meet-up format, I sent an invitation to my list of past participants in Arch2Arch panel discussions. The following people showed up to take seats at the virtual table and drive the conversation: Hajo Normann is a SOA architect and consultant at EDS in Frankfurt Blog | LinkedIn | Oracle Mix | Oracle ACE Profile | Books Jeff Davies is a Senior Product Manager at Oracle, and is the primary author of The Definitive Guide to SOA: Oracle Service Bus Homepage | Blog | LinkedIn | Oracle Mix Pat Shepherd is an enterprise architect with the Oracle Enterprise Solutions Group. Oracle Mix | LinkedIn | Blog This first segment focuses on a discussion of the persistent fear of SOA the panelists have observed among many developers and architects. Listen to Part 1 The discussion continues in next week’s segment with a look at the misinformation and misunderstanding behind the fear of SOA, and a discussion of possible solutions. So stay tuned: RSS del.icio.us Tags: oracle,otn,arch2arch,podcast,soa,service-oriented architecture,enterprise architecture Technorati Tags: oracle,otn,arch2arch,podcast,soa,service-oriented architecture,enterprise architecture

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Thoughts on my new template language?

- by Ralph

Let's start with an example: using "html5" using "extratags" html { head { title "Ordering Notice" jsinclude "jquery.js" } body { h1 "Ordering Notice" p "Dear @name," p "Thanks for placing your order with @company. It's scheduled to ship on {@ship_date|dateformat}." p "Here are the items you've ordered:" table { tr { th "name" th "price" } for(@item in @item_list) { tr { td @item.name td @item.price } } } if(@ordered_warranty) p "Your warranty information will be included in the packaging." p(class="footer") { "Sincerely," br @company } } } The "using" keyword indicates which tags to use. "html5" might include all the html5 standard tags, but your tags names wouldn't have to be based on their HTML counter-parts at all if you didn't want to. The "extratags" library for example might add an extra tag, called "jsinclude" which gets replaced with something like <script type="text/javascript" src="@content"></script> Tags can be optionally be followed by an opening brace. They will automatically be closed as the closing brace. If no brace is used, they will be closed after taking on element. Variables are prefixed with the @ symbol. They may be used inside double-quoted strings. I think I'll use single-quotes to indicate "no variable substitution" like PHP does. Filter functions can be applied to variables like @variable|filter. Arguments can be passed to the filter @variable|filter:@arg1,arg2="y" Attributes can be passed to tags by including them in (), like p(class="classname"). Some questions: Which symbol should I use to prefix variables? @ (like Razor), $ (like PHP), or something else? Should the @ symbol be necessary in "for" and "if" statements? It's kind of implied that those are variables. Tags and controls (like if,for) presently have the exact same syntax. Should I do something to differentiate the two? If so, what? Do you like the attribute syntax? (round brackets) I'll add more questions in a few minutes, once I get some feedback.

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CodePlex Daily Summary for Sunday, December 26, 2010

CodePlex Daily Summary for Sunday, December 26, 2010Popular ReleasesNoSimplerAccounting: NoSimplerAccounting 6.0: -Fixed a bug in expense category report.Temporary Data Storage Folder: TDS Folder source code: This is latest version 0.2 Beta code. To know the password request at neutron.request@gmail.comNHibernate Mapping Generator: NHibernate Mapping Generator 2.0: Added support for Postgres (Thanks to Angelo)NewLife XCode: XCode v6.5.2010.1223 ????（????v3.5??）: XCode v6.5.2010.1223 ????，??： NewLife.Core ??? NewLife.Net ??? XControl ??? XTemplate ????，??C#?????? XAgent ???? NewLife.CommonEnitty ??????（???，XCode??????） XCode?? ?????????，??????????????????，?????95% XCode v3.5.2009.0714 ??，?v3.5?v6.0???????????????，?????????。v3.5???????????，??????????????。 XCoder ??XTemplate?????????，????????XCode??? XCoder_Src ???????（????XTemplate????），??????????????????Windows Workflow Foundation on Codeplex: Microsoft.Activities.UnitTesting 1.71: New in this release Episode as Tasks using the Task Parallel Library CHM Help file now included in release. StyleCop compliance is resulting in massive refatoring but should not cause breaking changes Breaking Change DefaultTimeout is now a TimeSpan Removed default parameters using int timeout = DefaultTimeout and added overloads insteadMiniTwitter: 1.64: MiniTwitter 1.64 ???? ?? 1.63 ??? URL ??????????????Ajax ASP.Net Forum: InSeCla Forum Software v0.1.9: *VERSION: 0.1.9* HAPPY CHRISTMAS FEATURES ADDED Added features customizabled per category level (Customize at ADMIN/Categories Tab) Allow Anonymous Threads, Allow Anonymous Post Virtual URLs (friendly urls) has finally added And you can have some forum (category) using virtual urls and other using normal urls. Check !, as this improve the SEO indexing results Moderation Instant On: Delete Thread, Move Thread Available to users being members of moderators or administrators InstantO...VivoSocial: VivoSocial 7.4.0: Please see changes: http://support.vivoware.com/project/ChangeLog.aspx?PROJID=48Umbraco CMS: Umbraco 4.6 Beta - codename JUNO: The Umbraco 4.6 beta (codename JUNO) release contains many new features focusing on an improved installation experience, a number of robust developer features, and contains more than 89 bug fixes since the 4.5.2 release. Improved installer experience Updated Starter Kits (Simple, Blog, Personal, Business) Beautiful, free, customizable skins included Skinning engine and Skin customization (see Skinning Documentation Kit) Default dashboards on install with hide option Updated Login t...SSH.NET Library: 2010.12.23: This release includes some bug fixes and few new fetures. Fixes Allow to retrieve big directory structures ssh-dss algorithm is fixed Populate sftp file attributes New Features Support for passhrase when private key is used Support added for diffie-hellman-group14-sha1,diffie-hellman-group-exchange-sha256 and diffie-hellman-group-exchange-sha1 key exchange algorithms Allow to provide multiple key files for authentication Add support for "keyboard-interactive" authentication method...ASP.NET MVC SiteMap provider: MvcSiteMapProvider 2.3.0: Using NuGet?MvcSiteMapProvider is also listed in the NuGet feed. Learn more... Like the project? Consider a donation!Donate via PayPal via PayPal. Release notesThis will be the last release targeting ASP.NET MVC 2 and .NET 3.5. MvcSiteMapProvider 3.0.0 will be targeting ASP.NET MVC 3 and .NET 4 Web.config setting skipAssemblyScanOn has been deprecated in favor of excludeAssembliesForScan and includeAssembliesForScan ISiteMapNodeUrlResolver is now completely responsible for generating th...SuperSocket, an extensible socket application framework: SuperSocket 1.3 beta 2: Compared with SuperSocket 1.3 beta 1, the changes listed below have been done in SuperSocket 1.3 beta 2: added supports for .NET 3.5 replaced Logging Application Block of EntLib with Log4Net improved the code about logging fixed a bug in QuickStart sample project added IPv6 supportTibiaPinger: TibiaPinger v1.0: TibiaPinger v1.0Media Companion: Media Companion 3.400: Extract the entire archive to a folder which has user access rights, eg desktop, documents etc. A manual is included to get you startedMulticore Task Framework: MTF 1.0.1: Release 1.0.1 of Multicore Task Framework.SQL Monitor - tracking sql server activities: SQL Monitor 3.0 alpha 7: 1. added script save/load in user query window 2. fixed problem with connection dialog when choosing windows auth but still ask for user name 3. auto open user table when double click one table node 4. improved alert message, added log only methodEnhSim: EnhSim 2.2.6 ALPHA: 2.2.6 ALPHAThis release supports WoW patch 4.03a at level 85 To use this release, you must have the Microsoft Visual C++ 2010 Redistributable Package installed. This can be downloaded from http://www.microsoft.com/downloads/en/details.aspx?FamilyID=A7B7A05E-6DE6-4D3A-A423-37BF0912DB84 To use the GUI you must have the .NET 4.0 Framework installed. This can be downloaded from http://www.microsoft.com/downloads/en/details.aspx?FamilyID=9cfb2d51-5ff4-4491-b0e5-b386f32c0992 - Fixing up some r...ASP.NET MVC Project Awesome (jQuery Ajax helpers): 1.4.3: Helpers (controls) that you can use to build highly responsive and interactive Ajax-enabled Web applications. These helpers include Autocomplete, AjaxDropdown, Lookup, Confirm Dialog, Popup Form, Popup and Pager new stuff: Improvements for confirm, popup, popup form RenderView controller extension the user experience for crud in live demo has been substantially improved + added search all the features are shown in the live demoGanttPlanner: GanttPlanner V1.0: GanttPlanner V1.0 include GanttPlanner.dll and also a Demo application.N2 CMS: 2.1 release candidate 3: * Web platform installer support available N2 is a lightweight CMS framework for ASP.NET. It helps you build great web sites that anyone can update. Major Changes Support for auto-implemented properties ({get;set;}, based on contribution by And Poulsen) A bunch of bugs were fixed File manager improvements (multiple file upload, resize images to fit) New image gallery Infinite scroll paging on news Content templates First time with N2? Try the demo site Download one of the templ...New ProjectsA.I. Semantic Net Tests: A test using "semantic net" artificial intelligence developed in C++.Awesome.ClientID: Awesome.ClientID is a HTTPModule which serializes the ClientID of server controls, and page/usercontrol properties to a Json to make working with JavaScript easier without the need for outputting ClientID's. It's a solution for clean ClientIDs for .NET 2.0/3.5BitTweet: BitTweet is a fast, simple and easy to use Twitter client with tweeting, reading and writing functions included. It is know for being the most secure and fast Twitter client out there! It is written in Visual Basic .NET 2008. ~Tweet in a bit!CarRental001: carCrudo: CRUDO - The MCG (Model-Controller-Generator) CGF (Code Generation Framework) Visit The Project HomePage: http://adityayadav.com/CRUDO_The_MCG_Model_Controller_Generator_CGF_Code_Generation_Framework.aspx Licenses: 1) GPL v2 2) Commercial (contact us for information)Effeks: FX trading sample application sing prismEnhanced WebPart: Enhanced Webpart is a webpart with enhanced properties editor. It allows you display properties of most common types, and provides easy way to add custom controls to display your own types in webpart properties editor. Enhanced Webpart fully supports localization.Esteffin's graphic: Esercitazioni grafica 2010farasun: Source code Repository for farasun.wordpress.comGCTF: Desafio .NET Realizado na FACISAImgshow Plugin for Windows Live Writer: By using Imgshow Query you are able to publish multimedia content such as Youtube, Facebook Video, PDF, and other Imgshow supported service.Instant Messenger Using WPF and WCF: instant messenger using wcf and wpfjMenu: Create a dotnetnuke module that cover all kind of jquery menu pluginsMcopy API: Copy all files and directores in windows shell. Support long path (less then 32000 chars) and network path (eg. \\server\share or \\127.0.0.1\share)MOSSWebServices: This project contains code for interacting with the 21 web services provided by MOSS. This is targeted towards WSS developers This currently contains code to interact with "UserGroups" web service. I will keep adding code to interact with other MOSS web services soon. Nest Hub - Twitter Client: Nest Hub is a free Twitter client for PC. It's developed in VB.NET.Neural Networks Library: Neural networks Library by SefnajParallelism: Parallelism- Unified Parallel & Concurrency Framework Visit the Project HomePage: http://adityayadav.com/Parallelism.aspx Licenses: 1) GPL v2 2) Commercial (contact us for information)PDF IRM Protector For SharePoint 2007 And 2010: The PDF IRM Protector controls the conversion of PDF documents to their encrypted, rights-managed format and the decryption of PDF documents from their rights-managed format back to their original format. The project targets both SharePoint 2007 and 2010. PHP Form Validator - Isis: Project Isis simplifies the process of form validation for PHP. Offering a robust flag and function system, allowing you to encode the forms with the correct validation data and be done.Recycle Me: Open Source Project is to help and educate people in regarding reuse and recycling of daily life items. This is a Social project so we need funds for research and surveys. Volunteers are most welcome to contribute and certifications for their participation are available. ThanksSencha ExtJS Import Library for Script#: Script# import library for Sencha Ext JS Javascript Framework Separating Vertices: Given a graph as a collection of edges and vertices, it identifies the separating vertices, biconnected components, and edges. SIG - SISTEMA DE GESTÃO INTERNA: Projeto feito para a empresa MODEMTELECOM, consultoria em telecomunicoções.Smart Card COM: Smart Card COM Library, useful to access smart cards from a Web page in Internet ExplorerSocial Hub: Social HubStock Research: Test project for stocke researchtaokeba: ????????????????????，???????????。Temporary Data Storage Folder: This software creates a folder that stores temporary data that you want to store for temporary tasks. Temporary tasks such as storing a file that is to be deleted after some time. It automatically deleted those files on exit. Learn more at www.neutronsoftwares.weebly.comTukUI Updater: A OpenSource Windows Updater tool for the World of Warcraft(R) addon TukUI Developed in .NET 3.5 Discusion thread are found at the official TukUI forums: http://www.tukui.org/v2/forums/topic.php?id=4982 WebUtil: This is a project for using all of features by the web.

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Where to learn how to replicate an Excel template?

- by Rosarch

This Excel template is really cool. There are a lot of things in it I don't know how to do, such as: Having header rows that "stick" to the top even when you scroll down Slider on the first page changes where the chart pulls its data from Functions seem to be referring to named ranges in tables, like =SUM([nov]). Where do those names come from? Clicking "back to overview" on the "Budget" page returns you to the "Dashboard" page The number under "starting balance" of the top right corner of "Budget" changes when you change cell C5 On "Budget", each cell in the first column of each table has a drop-down menu for text, which seems to come from the "Setup" page The background isn't just plain white, but when I try to format paint it onto a new sheet, nothing happens If you know how any of these effects are achieved, I'm definitely curious. But I guess the main point of my question is where I can go to answer these questions for myself. Are templates explained anywhere?

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cannot delete IPv6 default gateway

- by NulledPointer

The commands below should be pretty self-explanatory. Please note that the route for which i get failure is obtained by RA and has very less expiry ( e Flag in UDAe). @vm:~$ ip -6 route 2001:4860:4001:800::1002 via fe80::20c:29ff:fe87:f9e7 dev eth1 proto static metric 1024 2001:4860:4001:800::1003 via fe80::20c:29ff:fe87:f9e7 dev eth1 proto static metric 1024 2001:4860:4001:800::1005 via fe80::20c:29ff:fe87:f9e7 dev eth1 proto static metric 1024 2001:4860:4001:803::100e via fe80::20c:29ff:fe87:f9e7 dev eth1 proto static metric 1024 fd00:ffff:ffff:fff1::/64 dev eth1 proto kernel metric 256 expires 2592300sec fe80::/64 dev eth1 proto kernel metric 256 default via fe80::20c:29ff:fe87:f9e7 dev eth1 proto static metric 1 default via fe80::20c:29ff:fe87:f9e7 dev eth1 proto kernel metric 1024 expires 1776sec @vm:~$ @vm:~$ @vm:~$ @vm:~$ sudo route -6 delete default gw fe80::20c:29ff:fe87:f9e7 @vm:~$ ip -6 route 2001:4860:4001:800::1002 via fe80::20c:29ff:fe87:f9e7 dev eth1 proto static metric 1024 2001:4860:4001:800::1003 via fe80::20c:29ff:fe87:f9e7 dev eth1 proto static metric 1024 2001:4860:4001:800::1005 via fe80::20c:29ff:fe87:f9e7 dev eth1 proto static metric 1024 2001:4860:4001:803::100e via fe80::20c:29ff:fe87:f9e7 dev eth1 proto static metric 1024 fd00:ffff:ffff:fff1::/64 dev eth1 proto kernel metric 256 expires 2592279sec fe80::/64 dev eth1 proto kernel metric 256 default via fe80::20c:29ff:fe87:f9e7 dev eth1 proto kernel metric 1024 expires 1755sec @vm:~$ @vm:~$ @vm:~$ sudo route -6 delete ::/0 gw fe80::20c:29ff:fe87:f9e7 dev eth1 SIOCDELRT: No such process @vm:~$ @vm:~$ @vm:~$ route -n6 Kernel IPv6 routing table Destination Next Hop Flag Met Ref Use If 2001:4860:4001:800::1002/128 fe80::20c:29ff:fe87:f9e7 UG 1024 0 0 eth1 2001:4860:4001:800::1003/128 fe80::20c:29ff:fe87:f9e7 UG 1024 0 0 eth1 2001:4860:4001:800::1005/128 fe80::20c:29ff:fe87:f9e7 UG 1024 0 0 eth1 2001:4860:4001:803::100e/128 fe80::20c:29ff:fe87:f9e7 UG 1024 0 0 eth1 fd00:ffff:ffff:fff1::/64 :: UAe 256 0 0 eth1 fe80::/64 :: U 256 0 0 eth1 ::/0 fe80::20c:29ff:fe87:f9e7 UGDAe 1024 0 0 eth1 ::/0 :: !n -1 1 349 lo ::1/128 :: Un 0 1 3 lo fd00:ffff:ffff:fff1:a00:27ff:fe7f:7245/128 :: Un 0 1 0 lo fd00:ffff:ffff:fff1:fce8:ce07:b9ea:389f/128 :: Un 0 1 0 lo fe80::a00:27ff:fe7f:7245/128 :: Un 0 1 0 lo ff00::/8 :: U 256 0 0 eth1 ::/0 :: !n -1 1 349 lo @vm:~$ UPDATE: Another question is whats the use of link local address as the default route?

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Multiple home routers

- by netvope

Suppose I have the following configuration: Router A: WAN port connected to the Internet, LAN = 192.168.1.0/24 Computer A: Connected to router A as 192.168.1.101 Router B: WAN port connected to router A as 192.168.1.102, LAN = 192.168.2.0/24 Computer B: Connected to router B as 192.168.2.101 Now I want computer A to communicate with computer B seamlessly (e.g. can establish a TCP connection by running nc 192.168.2.101 <port>) by means of routing, rather than merging the two networks into one (which can be easily accomplished using router B as a switch). Most routers are shipped with NAT turned on, of which I definitely need to turn off in router B. But what other steps do I need to take so that packets from computer A to computer B would go through router B? I could manually add a routing table entry in computer A so that all packets targeted to 192.168.2.0/24 go through gateway 192.168.1.102, but I would prefer an automatic way if it exist.

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Multiple home routers

- by netvope

Suppose I have the following configuration: Router A: WAN port connected to the Internet, LAN = 192.168.1.0/24 Computer A: Connected to router A as 192.168.1.101 Router B: WAN port connected to router A as 192.168.1.102, LAN = 192.168.2.0/24 Computer B: Connected to router B as 192.168.2.101 Now I want computer A to communicate with computer B seamlessly (e.g. can establish a TCP connection by running nc 192.168.2.101 <port>) by means of routing, rather than merging the two networks into one (which can be easily accomplished using router B as a switch). Most routers are shipped with NAT turned on, of which I definitely need to turn off in router B. But what other steps do I need to take so that packets from computer A to computer B would go through router B? I could manually add a routing table entry in computer A so that all packets targeted to 192.168.2.0/24 go through gateway 192.168.1.102, but I would prefer an automatic way if it exist.

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External Hard-Drive Randomly Ejects; Stays On

- by Kaleb F.

My 250GB I/O Magic USB external hard-drive randomly disconnects / ejects from the computer after between 2-30 minutes of use. When this happens, the blinking activity light on the front of the hdd turns off; however, the disks can still be heard spinning. Unplugging & replugging in the USB does not reconnect the device and the activity light remains unlit. The only way to continue using it is to flip off then on the power switch of the hdd. The hard-drive was formatted with MBR partition table and 2 NTFS volumes. I recently tried switching to GUID with two Mac OS Extended (Journaled), but the problem remains. This error occurs with my new Macbook Pro with Snow Leopard as well as with my DELL E520 with Windows 7 Ultimate.

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Microsoft ISA 2006 Log Extraction Issues

- by Johandk

Hi, We have a client running ISA2006 with logs going to MSDE. The MSDE database gets rotated. We have NO control over the client infrastructure. We need to get the logs out to a TEXT file on the server itself which will be forwarded to a remote server by other software we already have in place. My first thought was doing it via Stored Procs. Another option is vbscript? The actual table holding the logs has no primary key or other identifier so I think the dump should be done once a day for the previous day, but ideally it should run several times a day. Any ideas?

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RAID FS detection at boot time

- by alex

An excerpt from dmesg: md: Autodetecting RAID arrays. md: Scanned 2 and added 2 devices. md: autorun ... md: considering sdb1 ... md: adding sdb1 ... md: adding sda1 ... md: created md1 md: bind<sda1> md: bind<sdb1> md: running: <sdb1><sda1> raid1: raid set md1 active with 2 out of 2 mirrors md1: detected capacity change from 0 to 1500299198464 md: ... autorun DONE. md1: unknown partition table EXT3-fs (md1): error: couldn't mount because of unsupported optional features (240) EXT2-fs (md1): error: couldn't mount because of unsupported optional features (240) EXT4-fs (md1): mounted filesystem with ordered data mode Is it OK that kernel tries to mount an ext4 raid as ext3, ext2 first? Is there a way to tell it to skip those two steps? Just in case: /dev/md1 / ext4 noatime 0 1 TIA.

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Storage Forum at Oracle OpenWorld

- by kgee

For anyone attending Oracle OpenWorld and involved in Storage, join us at the Storage Forum & Reception. This special engagement offers you the ability to meet Oracle’s top storage executives, architects and fellow storage colleagues. Features include interactive sessions and round-table discussions on Oracle's storage strategy, product direction, and real-world customer implementations. It’s your chance to ask questions and learn first-hand about Oracle's response to top trends and what keeps storage managers up at night, including how to contain storage costs, improve performance, and ensure seamless integration with Oracle software environments. Featured Speakers: Mike Workman, SVP of Pillar Axiom Storage Group; Phil Bullinger, SVP of Sun ZFS Storage Group; and Jim Cates, VP of Tape Systems Storage Group Added Bonus: The Storage Forum will be followed by an exclusive Wine and Cocktail Reception where you can... Meet and network with peers, and other storage professionals Interact with Oracle’s experts in a fun and relaxed setting Wind down and prepare for the Oracle Customer Appreciation Event featuring Pearl Jam and Kings of Leon Date & Times:Wednesday, October 3, 20123:30 – 5:00 p.m. Forum 5:00 – 7:00 p.m. Reception Disclaimer: Space is limited, so register at http://bit.ly/PULcyR as soon as possible! If you want any more information, feel free to email [email protected]

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Large invoice database structure and rendering

- by user132624

Our client has a MS SQL database that has 1 million customer invoice records in it. Using the database, our client wants its customers to be able to log into a frontend web site and then be able to view, modify and download their company’s invoices. Given the size of the database and the large number of customers who may log into the web site at any time, we are concerned about data base engine performance and web page invoice rendering performance. The 1 million invoice database is for just 90 days sales, so we will remove invoices over 90 days old from the database. Most of the invoices have multiple line items. We can easily convert our invoices into various data formats so for example it is easy for us to convert to and from SQL to XML with related schema and XSLT. Any data conversion would be done on another server so as not to burden the web interface server. We have tentatively decided to run the web site on a .NET Framework IIS web server using MS SQL on MS Azure. How would you suggest we structure our database for best performance? For example, should we put all the invoices of all customers located within the same 5 digit or 6 digit zip codes into the same table? Or could we set up a separate home directory for each customer on IIS and place each customer’s invoices in each customer’s home directory in XML format? And secondly what would you suggest would be the best method to render customer invoices on a web page and allow customers to modify for best performance? The ADO.net XML Data Set looks intriguing to us as a method, but we have never used it.

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How can I dual boot a UEFI OS and a legacy boot OS, or convert stock Windows 8 to BIOS?

- by The Great Widi

I have a computer (HP Pavilion g6-2342dx) which came with Windows 8, and thus the new UEFI boot system. I would like to install a few OS's which are not EFI compatible, and Arch GNU/Linux with BIOS mode. However, I would not like to completely wipe all my files to set to legacy. My preferred options would be to: 1. Multiboot legacy OS alongside my EFI os 2. Convert Windows 8 and Ubuntu to legacy without reformatting or switching to MSDOS part table. If anyone could suggest a solution or a method, your help would be appreciated! Thanks!

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The internal storage of a DATETIME2 value

- by Peter Larsson

Today I went for investigating the internal storage of DATETIME2 datatype. What I found out was that for a datetime2 value with precision 0 (seconds only), SQL Server need 6 bytes to represent the value, but stores 7 bytes. This is because SQL Server add one byte that holds the precision for the datetime2 value. Start with this very simple repro declare @now datetime2(7) = '2010-12-15 21:04:03.6934231' select cast(cast(@now as datetime2(0)) as binary(7)), cast(cast(@now as datetime2(1)) as binary(7)), cast(cast(@now as datetime2(2)) as binary(7)), cast(cast(@now as datetime2(3)) as binary(8)), cast(cast(@now as datetime2(4)) as binary(8)), cast(cast(@now as datetime2(5)) as binary(9)), cast(cast(@now as datetime2(6)) as binary(9)), cast(cast(@now as datetime2(7)) as binary(9)) Now we are going to copy and paste these binary values and investigate which value is representing what time part. Prefix Ticks Ticks Days Days Original value ------ ---------- ------------ ------ ------ -------------------- 0x 00 442801 75844 A8330B 734120 0x00442801A8330B 0x 01 A5920B 758437 A8330B 734120 0x01A5920BA8330B 0x 02 71BA73 7584369 A8330B 734120 0x0271BA73A8330B 0x 03 6D488504 75843693 A8330B 734120 0x036D488504A8330B 0x 04 46D4342D 758436934 A8330B 734120 0x0446D4342DA8330B 0x 05 BE4A10C401 7584369342 A8330B 734120 0x05BE4A10C401A8330B 0x 06 6FEBA2A811 75843693423 A8330B 734120 0x066FEBA2A811A8330B 0x 07 57325D96B0 758436934231 A8330B 734120 0x0757325D96B0A8330B Let us use the following color schema Red - Prefix Green - Time part Blue - Day part What you can see is that the date part is equal in all cases, which makes sense since the precision doesm't affect the datepart. What would have been fun, is datetime2(negative) just like round accepts a negative value. -1 would mean rounding to 10 second, -2 rounding to minute, -3 rounding to 10 minutes, -4 rounding to hour and finally -5 rounding to 10 hour. -5 is pretty useless, but if you extend this thinking to -6, -7 and so on, you could actually get a datetime2 value which is accurate to the month only. Well, enough ranting about this. Let's get back to the table above. If you add 75844 second to midnight, you get 21:04:04, which is exactly what you got in the select statement above. And if you look at it, it makes perfect sense that each following value is 10 times greater when the precision is increased one step too. //Peter

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How can I run the pixel shader effect?

- by Yashwinder

Stated below is the code for my pixel shader which I am rendering after the vertex shader. I have set the wordViewProjection matrix in my program but I don't know to set the progress variable i.e in my pixel shader file which will make the image displayed by the help of a quad to give out transition effect. Here is the code for my pixel shader program::: As my pixel shader is giving a static effect and now I want to use it to give some effect. So for this I have to add a progress variable in my pixel shader and initialize to the Constant table function i.e constantTable.SetValue(D3DDevice,"progress",progress ); I am having the problem in using this function for progress in my program. Anybody know how to set this variable in my program. And my new pixel shader code is float progress : register(C0); sampler2D implicitInput : register(s0); sampler2D oldInput : register(s1); struct VS_OUTPUT { float4 Position : POSITION; float4 Color : COLOR0; float2 UV : TEXCOORD 0; }; float4 Blinds(float2 uv) { if(frac(uv.y * 5) < progress) { return tex2D(implicitInput, uv); } else { return tex2D(oldInput, uv); } } // Pixel Shader { return Blinds(input.UV); }

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/planes and /clubs or /wiki/planes and /wiki/clubs

- by Jelmer

I am currently working on a nice application about which I can't share all the details, but it will have some sort of a wiki part. In this wiki, you will be able to change the planes as well as the clubs, maybe in the future it will be possible to change the countries and manufacturers as well. But I have to think about this and I have to check how good this is. But, you will understand that it has to be expendable! That is really important. Use the planes controller with a edit page and the same for the clubs Route the planes and clubs controller to the wiki controller, so we have 1 nice "path" to edit this stuff. I want to have it called wiki that is for sure. Because that is what it is, but I am storing the planes and clubs data in its down table in my database. I think that is kinda obvious since it has to be maintainable. Right now you could edit a plane via the url: example.com/wiki/planes/edit/Duo_Discus.html Do you think that is better than example.com/planes/edit/Duo_Discus.html since it is easy to understand for the user, that he is working in the wiki instead of in the planes ? Or do you think this will break the user experience?

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Multicast doesn't seem to be working on RHEL 5.5

- by NullUser

I'm trying to install Oracle Grid Infrastructure on two machines. Their documentation states You must enable multicasting for the cluster on the IP address subnet ranges 224.0.0.0/24 and 230.0.1.0/24 So I ran: route add -net 224.0.0.0/24 dev eth2 route add -net 230.0.1.0/24 dev eth2 route -n produces: Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 230.0.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth2 224.0.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth2 # and others An ifconfig eth2 shows, among other things, UP BROADCAST RUNNING MULTICAST. However, when I run their multicast test utility, it fails me: Test for Multicast address 230.0.1.0 Sep 3 19:40:39 | Multicast Failed for eth2 using address 230.0.1.0:42000 Test for Multicast address 224.0.0.251 Sep 3 19:41:10 | Multicast Failed for eth2 using address 224.0.0.251:42001 What am I doing wrong?

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New training on Power Pivot with recorded video courses

- by Marco Russo (SQLBI)

I and Alberto Ferrari started delivering training on Power Pivot in 2010, initially in classrooms and then also online. We also recorded videos for Project Botticelli, where you can find content about Microsoft tools and services for Business Intelligence. In the last months, we produced a recorded video course for people that want to learn Power Pivot without attending a scheduled course. We split the entire Power Pivot course training in three editions, offering at a lower price the more introductive modules: Beginner: introduces Power Pivot to any user who knows Excel and want to create reports with more complex and large data structures than a single table. Intermediate: improves skills on Power Pivot for Excel, introducing the DAX language and important features such as CALCULATE and Time Intelligence functions. Advanced: includes a depth coverage of the DAX language, which is required for writing complex calculations, and other advanced features of both Excel and Power Pivot. There are also two bundles, that includes two or three editions at a lower price. Most important, we have a special 40% launch discount on all published video courses using the coupon SQLBI-FRNDS-14 valid until August 31, 2014. Just follow the link to see a more complete description of the editions available and their discounted prices. Regular prices start at $29, which means that you can start a training with less than $18 using the special promotion. P.S.: we recently launched a new responsive version of the SQLBI web site, and now we also have a page dedicated to all videos available about our sessions in conferences around the world. You can find more than 30 hours of free videos here: http://www.sqlbi.com/tv.

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Improving the performance of a db import process

- by mmr

I have a program in Microsoft Access that processes text and also inserts data in MySQL database. This operation takes 30 mins or less to finished. I translated it into VB.NET and it takes 2 hours to finish. The program goes like this: A text file contains individual swipe from a corresponding person, it contains their id, time and date of swipe in the machine, and an indicator if it is a time-in or a time-out. I process this text, segregate the information and insert the time-in and time-out per row. I also check if there are double occurrences in the database. After checking, I simply merge the time-in and time-out of the corresponding person into one row only. This process takes 2 hours to finished in VB.NET considering I have a table to compare which contains 600,000+ rows. Now, I read in the internet that python is best in text processing, i already have a test but i doubt in database operation. What do you think is the best programming language for this kind of problem? How can I speed up the process? My first idea was using python instead of VB.NET, but since people here telling me here on SO that this most probably won't help I am searching for different solutions.

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Stupid Geek Tricks: Change Your IP Address From the Command Line in Linux

- by Taylor Gibb

Almost everybody can figure out how to change their IP address using an interface, but did you know you can set your network card’s IP address using a simple command from the command line? Changing Your IP From the Command Line in Linux Note: This will work on all Debian based Linux Distro’s. To get started type ifconfig into the terminal and hit enter, take note of the name of the interface that you want to change the settings for. To change the settings, you also use the ifconfig command, this time with a few parameters: sudo ifconfig eth0 192.168.0.1 netmask 255.255.255.0 That’s about all all you need to do to change your IP, of course the above command assumes a few things: The interface that you want to change the IP for is eth0 The IP you want to give the interface is 192.168.0.1 The Subnet Mask you want to set for the interface is 255.255.255.0 If you run ifconfig again you will see that your interface has now taken on the new settings you assigned to it. If you wondering how to change the Default Gateway, you can use the route command. sudo route add default gw 192.168.0.253 eth0 Will set your Default Gateway on the eth0 interface to 192.168.0.253. To see your new setting, you will need to display the routing table. route -n That’s all there is to it. How to Play Classic Arcade Games On Your PC How to Use an Xbox 360 Controller On Your Windows PC Download the Official How-To Geek Trivia App for Windows 8

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/dev/sda1 not a subset of /dev/sda?

- by Guillaume Brunerie

Hi, the first entry of my partition table is: $ sudo hexdump -Cv -n 16 -s 446 /dev/sda 000001be 80 01 01 00 83 fe ff ff 3f 00 00 00 81 1c 20 03 |........?..... .| (-Cv describe the output format, -n 16 asks for 16 bytes and -s 446 skips the first 446 bytes) You can see that my first partition is a primary Linux partition and that this partition begin at sector 63 (see for example here for the structure of the partition table). I would then expect that except for the first 63 sectors and the other partitions, /dev/sda1 and /dev/sda are exactly the same. But this is not the case, the sector #2 of /dev/sda1 is not exactly the same as the sector #65 of /dev/sda (but they are very similar, only 16 bytes are different): $ sudo hexdump -Cv -n 512 -s 65b /dev/sda 00008200 00 20 19 00 90 03 64 00 2d 00 05 00 5a 2f 56 00 |. ....d.-...Z/V.| 00008210 b6 b1 16 00 00 00 00 00 02 00 00 00 02 00 00 00 |................| 00008220 00 80 00 00 00 80 00 00 00 20 00 00 d8 38 ee 4c |......... ...8.L| 00008230 9a 01 ef 4c 05 00 24 00 53 ef 01 00 01 00 00 00 |...L..$.S.......| 00008240 59 23 e9 4c 00 4e ed 00 00 00 00 00 01 00 00 00 |Y#.L.N..........| 00008250 00 00 00 00 0b 00 00 00 00 01 00 00 3c 00 00 00 |............<...| 00008260 42 02 00 00 7b 00 00 00 85 23 eb f2 71 67 44 f5 |B...{....#..qgD.| 00008270 bb 8f 6f f2 3a 59 ff 4d 55 62 75 6e 74 75 00 00 |..o.:Y.MUbuntu..| 00008280 00 00 00 00 00 00 00 00 2f 75 62 75 6e 74 75 00 |......../ubuntu.| 00008290 d8 3c df 5d 00 88 ff ff 52 d0 ef 1d 00 00 00 00 |.<.]....R.......| 000082a0 c0 40 51 b6 00 88 ff ff 00 4e c8 bb 00 88 ff ff |[email protected]......| 000082b0 c0 f6 86 b8 00 88 ff ff 30 2e 0d a0 ff ff ff ff |........0.......| 000082c0 38 3d df 5d 00 88 ff ff 00 00 00 00 00 00 fe 03 |8=.]............| 000082d0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| 000082e0 08 00 00 00 00 00 00 00 00 00 00 00 8a 53 d3 0e |.............S..| 000082f0 7c 7a 43 e4 8b fb ca e0 72 b7 fa c8 01 01 00 00 ||zC.....r.......| 00008300 00 00 00 00 00 00 00 00 16 4c 47 4b 0a f3 03 00 |.........LGK....| 00008310 04 00 00 00 00 00 00 00 00 00 00 00 fe 7f 00 00 |................| 00008320 24 b7 0c 00 fe 7f 00 00 01 00 00 00 22 37 0d 00 |$..........."7..| 00008330 ff 7f 00 00 01 00 00 00 23 37 0d 00 00 00 00 00 |........#7......| 00008340 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 08 |................| 00008350 00 00 00 00 00 00 00 00 00 00 00 00 1c 00 1c 00 |................| 00008360 01 00 00 00 e9 7f 00 00 00 00 00 00 00 00 00 00 |................| 00008370 00 00 00 00 04 00 00 00 9f 7d bb 00 00 00 00 00 |.........}......| 00008380 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| 00008390 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| 000083a0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| 000083b0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| 000083c0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| 000083d0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| 000083e0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| 000083f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| versus $ sudo hexdump -Cv -n 512 -s 2b /dev/sda1 00000400 00 20 19 00 90 03 64 00 2d 00 05 00 5a 2f 56 00 |. ....d.-...Z/V.| 00000410 b6 b1 16 00 00 00 00 00 02 00 00 00 02 00 00 00 |................| 00000420 00 80 00 00 00 80 00 00 00 20 00 00 df 76 ef 4c |......... ...v.L| 00000430 df 76 ef 4c 06 00 24 00 53 ef 01 00 01 00 00 00 |.v.L..$.S.......| 00000440 59 23 e9 4c 00 4e ed 00 00 00 00 00 01 00 00 00 |Y#.L.N..........| 00000450 00 00 00 00 0b 00 00 00 00 01 00 00 3c 00 00 00 |............<...| 00000460 46 02 00 00 7b 00 00 00 85 23 eb f2 71 67 44 f5 |F...{....#..qgD.| 00000470 bb 8f 6f f2 3a 59 ff 4d 55 62 75 6e 74 75 00 00 |..o.:Y.MUbuntu..| 00000480 00 00 00 00 00 00 00 00 2f 75 62 75 6e 74 75 00 |......../ubuntu.| 00000490 d8 3c df 5d 00 88 ff ff 52 d0 ef 1d 00 00 00 00 |.<.]....R.......| 000004a0 c0 40 51 b6 00 88 ff ff 00 4e c8 bb 00 88 ff ff |[email protected]......| 000004b0 c0 f6 86 b8 00 88 ff ff 30 2e 0d a0 ff ff ff ff |........0.......| 000004c0 38 3d df 5d 00 88 ff ff 00 00 00 00 00 00 fe 03 |8=.]............| 000004d0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| 000004e0 08 00 00 00 00 00 00 00 00 00 00 00 8a 53 d3 0e |.............S..| 000004f0 7c 7a 43 e4 8b fb ca e0 72 b7 fa c8 01 01 00 00 ||zC.....r.......| 00000500 00 00 00 00 00 00 00 00 16 4c 47 4b 0a f3 03 00 |.........LGK....| 00000510 04 00 00 00 00 00 00 00 00 00 00 00 fe 7f 00 00 |................| 00000520 24 b7 0c 00 fe 7f 00 00 01 00 00 00 22 37 0d 00 |$..........."7..| 00000530 ff 7f 00 00 01 00 00 00 23 37 0d 00 00 00 00 00 |........#7......| 00000540 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 08 |................| 00000550 00 00 00 00 00 00 00 00 00 00 00 00 1c 00 1c 00 |................| 00000560 01 00 00 00 e9 7f 00 00 00 00 00 00 00 00 00 00 |................| 00000570 00 00 00 00 04 00 00 00 a3 7d bb 00 00 00 00 00 |.........}......| 00000580 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| 00000590 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| 000005a0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| 000005b0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| 000005c0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| 000005d0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| 000005e0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| 000005f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| For example in the third line, there is a 8.L in the first hexdump and v.L in the second. Why are there differences?

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WebCenter Spaces 11g PS2 Task Flow Customization

- by Javier Ductor

Previously, I wrote about Spaces Template Customization. In order to adapt Spaces to customers prototype, it was necessary to change template and skin, as well as the members task flow. In this entry, I describe how to customize this task flow.Default members portlet:Prototype Members Portlet:First thing to do, I downloaded SpacesTaskflowCustomizationApplication with its guide.This application allows developers to modify task flows in Spaces, such as Announcements, Discussions, Events, Members, etc. Before starting, some configuration is needed in jDeveloper, like changing role to 'Customization Developer' mode, although it is explained in the application guide. It is important to know that the way task flows are modified is through libraries, and they cannot be updated directly in the source code like templates, you must use the Structure panel for this. Steps to customize Members portlet:1. There are two members views: showIconicView and showListView. By default it is set to Iconic view, but in my case I preferred the View list, so I updated in table-of-members-taskflow.xml this default value.2. Change the TableOfMembers-ListView.jspx file. By editing this file, you can control the way this task flow is displayed. So I customized this list view using the structure panel to get the desired look&feel.3. After changes are made, click save all, because every time a library changes an xml file is generated with all modifications listed, and they must be saved.4. Rebuild project and deploy application.5. Open WLST command window and import this customization to MDS repository with the 'import' command.Eventually, this was the result:Other task flows can be customized in a similar way.

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Windows 7 laptop's volume with headphones way too loud

- by jcao219

I have two headphones, neither has any amps or volume control, and both have the same problem with this computer. I normally have the volume on 10%, and that is optimal. I'm still very afraid that someday it will be at 100% and i'll accidentally have my headphones on. I tested how loud it is at maximum volume -- it's earsplittingly loud! In fact, it's so loud that if I lay the headphones down on the table, I can listen to a song perfectly clearly from meters away. Is there any way to make the volume control more safe for the ears?

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