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  • Maximizing TCP connections on HAProxy load balancer

    - by imaginative
    I am currently using HAProxy in order to load balance tcp connections from clients to my Erlang app server. The connection is persistent, which means I'm limited to roughly 64K clients on an optimized server (I'm currently running HAProxy on an m1.large EC2 instance). My app server is designed to horizontally scale based on the number of TCP connections. What's worrying me though is I'll need an equal number of HAProxy servers as app servers since it's a 1:1 connection. Is there currently a way to "proxy" the tcp connection to the app server so that once HAProxy sends the client off to my Erlang server, it can free up the connection, ready to serve another client? Are there any papers, existing solutions out there I can read so that I only have to worry about the 64K limit on my app servers, and not on the load balancing servers themselves?

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  • Farmyard

    - by Richard Jones
    Moooooooo     For a while now we’ve been using Apple’s enterprise device app distribution mechanism.   This allows you to have a user, click on a URL on their iOS device and it pulls down a new version of an enterprise app. of of our servers. Its really nice,  have a look at - http://developer.apple.com/library/ios/#featuredarticles/FA_Wireless_Enterprise_App_Distribution/Introduction/Introduction.html   I’ve embedded this, into a check on application launch, that a web-service is called to detect a newer version of the software is available.  It then calls the URL to the App and a new version is deployed. You can alert users that a new App update is available by sending them a push notification.  See screenshot at the top. We send our push notifications out to users,  using a simple C# service.    The fun part is this.   You can instruct the push notification to play a sound (embedded in the app already). So our push notification’s play a random farmyard noise, i.e from a selection of - cow.wav dogbrk.wav duck.wav goose.wav horse.wav lamb.wav monkey.wav – left field I know rooster.wav Imagine my amusement being able to periodically send out an update and watch our office (of about 60 people) turn into farm for a few seconds. I’ve messed up a few times, with people being interrupted on customer conference calls,  but people seem good humoured about it. (so far) Simple(ish) pleasures…

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  • How to: Apply themes using Server Object Model in SharePoint 2013 Preview

    - by panjkov
    One of new functionalities introduced in SharePoint 2013 Preview is new theming engine. Themes that are managed by this new engine don’t use Office Theme .thmx format and can’t be created using PowerPoint like it was case before. New themes are based on set of xml files stored in Theme Gallery “15” subfolder (on relative path _catalogs/theme/15): .spcolor files  which define color palettes for components of SharePoint interface .spfont files which contain set of predefined font schemes. There...(read more)

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  • Can I release complementary Windows 8 and WP8 apps on their respective stores?

    - by Clay Shannon
    I am creating a pair of apps, one to run preferably on tablets, but also laptops and PCs, and the other for WP8. These apps are complementary - having one is of no use without the other. I know there is a Windows Store, and a Windows Phone store, so one would be released on one, and one on the other. My question is: as these apps are useless by themselves (although in most cases it won't be the same people running both apps), will there be a problem with offering these useless-when-used-alone apps? IOW: Person A will use the Windows 8 app to interact with some people that have the WP8 app installed; those with the WP8 app will interact with a person or people who have the Windows 8 app installed. What I'm worried about is if these apps go through a certification process where they must be useful "standalone" - is that the case?

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  • adding executable file to path and launching from terminal directly

    - by ubunnttuu
    i just downloaded sublime text for my ubuntu, and its working fine. i have the executable file in my ~/sublime folder. now i would like to invoke this app from the terminal by just typing sublime. i suppose that is possible, pls let me know how. also, since this application did not need any configure/make/install (i just had to extract it and then use the exec file to run the app), i cannot add this to my gnome launcher fav apps panel. how can i put the app shortcut there, so that when i do a top-left and then type sublime, the results will show the applicaion and then i can click on it and invoke the app from there? thanks!

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  • AngularJS: structuring a web application with multiple ng-apps

    - by mg1075
    The blogosphere has a number of articles on the topic of AngularJS app structuring guidelines such as these (and others): http://www.johnpapa.net/angular-app-structuring-guidelines/ http://codingsmackdown.tv/blog/2013/04/19/angularjs-modules-for-great-justice/ http://danorlando.com/angularjs-architecture-understanding-modules/ http://henriquat.re/modularizing-angularjs/modularizing-angular-applications/modularizing-angular-applications.html However, one scenario I have yet to come across for guidelines and best practices is the case where you have a large web application containing multiple "mini-spa" apps, and the mini-spa apps all share a certain amount of code. I am not referring to the case of trying to have multiple ng-app declarations on the same page; rather, I mean different sections of a large site that have their own, unique ng-app declaration. As Scott Allen writes in his OdeToCode blog: One scenario I haven't found addressed very well is the scenario where multiple apps exist in the same greater web application and require some shared code on the client. Are there any recommended approaches to take, pitfalls to avoid, or good sample structures of this scenario that you can point to?

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  • Online SEO Tool to Analyze Your Website

    Learning search engine optimization can be difficult without some sort of SEO tool to help decipher in which direction your marketing efforts are headed. Though there are, in fact, many online SEO tools that can help with your internet marketing campaign, perhaps the most beneficial is an SEO tool that analyzes your entire website. This type of tool, usually offered free of charge, acts in a similar way to search engine crawlers.

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  • APIs that deal with logins

    - by Brandon Still
    I have been asked to make a mobile app for a friends website. The website is a Multi level marketing site that sells products and franchises. A client logs in in to the website and can view his or her dashboard ( user can view team members, business volume, commissions, invoices, etc.) The app is supposed to bring the dashboard to user's mobile devices (w/ some added features). The company does not have any APIs that deal with interaction or authentication, and I am new to the whole secure login side of app development. My questions is this, how do I let the users gain access to their information via my app from the secure website when there is no API?

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  • CodePlex Daily Summary for Wednesday, June 12, 2013

    CodePlex Daily Summary for Wednesday, June 12, 2013Popular ReleasesWeb Pages CMS: 0.5.0.5: Added empty media directoryWindows 8 App Desing Reference Template: Education Big Picture: EducationBigPicture: Download includes the following -> Source (C# and JS) -> Package -> Snapshots -> DocumentationModern UI for WPF: Modern UI 1.0.4: The ModernUI assembly including a demo app demonstrating the various features of Modern UI for WPF. Related downloads NuGet ModernUI for WPF is also available as NuGet package in the NuGet gallery, id: ModernUI.WPF Download Modern UI for WPF Templates A Visual Studio 2012 extension containing a collection of project and item templates for Modern UI for WPF. The extension includes the ModernUI.WPF NuGet package. DownloadToolbox for Dynamics CRM 2011: XrmToolBox (v1.2013.6.11): XrmToolbox improvement Add exception handling when loading plugins Updated information panel for displaying two lines of text Tools improvementMetadata Document Generator (v1.2013.6.10)New tool Web Resources Manager (v1.2013.6.11)Retrieve list of unused web resources Retrieve web resources from a solution All tools listAccess Checker (v1.2013.2.5) Attribute Bulk Updater (v1.2013.1.17) FetchXml Tester (v1.2013.3.4) Iconator (v1.2013.1.17) Metadata Document Generator (v1.2013.6.10) Privilege...Document.Editor: 2013.23: What's new for Document.Editor 2013.23: New Insert Emoticon support Improved Format support Minor Bug Fix's, improvements and speed upsChristoc's DotNetNuke Module Development Template: DotNetNuke 7 Project Templates V2.4 for VS2012: V2.4 - Release Date 6/10/2013 Items addressed in this 2.4 release Updated MSBuild Community Tasks reference to 1.4.0.61 Setting up your DotNetNuke Module Development Environment Installing Christoc's DotNetNuke Module Development Templates Customizing the latest DotNetNuke Module Development Project TemplatesLayered Architecture Sample for .NET: Leave Sample - June 2013 (for .NET 4.5): Thank You for downloading Layered Architecture Sample. Please read the accompanying README.txt file for setup and installation instructions. This is the first set of a series of revised samples that will be released to illustrate the layered architecture design pattern. This version is only supported on Visual Studio 2012. This samples illustrates the use of ASP.NET Web Forms, ASP.NET Model Binding, Windows Communications Foundation (WCF), Windows Workflow Foundation (WF) and Microsoft Ente...Papercut: Papercut 2013-6-10: Feature: Shows From, To, Date and Subject of Email. Feature: Async UI and loading spinner. Enhancement: Improved speed when loading large attachments. Enhancement: Decoupled SMTP server into secondary assembly. Enhancement: Upgraded to .NET v4. Fix: Messages lost when received very fast. Fix: Email encoding issues on display/Automatically detect message Encoding Installation Note:Installation is copy and paste. Incoming messages are written to the start-up directory of Papercut. If you do n...SFDL.NET: SFDL.NET v1.1.0.4: Changelog: Ciritical Bug Fixed : Downloading of Files not possibleMapWinGIS ActiveX Map and GIS Component: MapWinGIS v4.8.8 Release Candidate - 32 Bit: This is the first release candidate of MapWinGIS. Please test it thoroughly.MapWindow 4: MapWindow GIS v4.8.8 - Release Candidate - 32Bit: Download the release notes here: http://svn.mapwindow.org/svnroot/MapWindow4Dev/Bin/MapWindowNotes.rtfLINQ to Twitter: LINQ to Twitter v2.1.06: Supports .NET 3.5, .NET 4.0, .NET 4.5, Silverlight 4.0, Windows Phone 7.1, Windows Phone 8, Client Profile, Windows 8, and Windows Azure. 100% Twitter API coverage. Also supports Twitter API v1.1! Also on NuGet.VR Player: VR Player 0.3 ALPHA: New plugin system with individual folders TrackIR support Maya and 3ds max formats support Dual screen support Mono layouts (left and right) Cylinder height parameter Barel effect factor parameter Razer hydra filter parameter VRPN bug fixes UI improvements Performances improvements Stabilization and logging with Log4Net New default values base on users feedback CTRL key to open menuSimCityPak: SimCityPak 0.1.0.8: SimCityPak 0.1.0.8 New features: Import BMP color palettes for vehicles Import RASTER file (uncompressed 8.8.8.8 DDS files) View different channels of RASTER files or preview of all layers combined Find text in javascripts TGA viewer Ground textures added to lot editor Many additional identified instances and propertiesWsus Package Publisher: Release v1.2.1306.09: Add more verifications on certificate validation. WPP will not let user to try publishing an update until the certificate is valid. Add certificate expiration date on the 'About' form. Filter Approbation to avoid a user to try to approve an update for uninstallation when the update do not support uninstallation. Add the server and console version on the 'About' form. WPP will not let user to publish an update until the server and console are not at the same level. WPP do not let user ...AJAX Control Toolkit: June 2013 Release: AJAX Control Toolkit Release Notes - June 2013 Release Version 7.0607June 2013 release of the AJAX Control Toolkit. AJAX Control Toolkit .NET 4.5 – AJAX Control Toolkit for .NET 4.5 and sample site (Recommended). AJAX Control Toolkit .NET 4 – AJAX Control Toolkit for .NET 4 and sample site (Recommended). AJAX Control Toolkit .NET 3.5 – AJAX Control Toolkit for .NET 3.5 and sample site (Recommended). Notes: - Instructions for using the AJAX Control Toolkit with ASP.NET 4.5 can be found at...Rawr: Rawr 5.2.1: This is the Downloadable WPF version of Rawr!For web-based version see http://elitistjerks.com/rawr.php You can find the version notes at: http://rawr.codeplex.com/wikipage?title=VersionNotes Rawr Addon (NOT UPDATED YET FOR MOP)We now have a Rawr Official Addon for in-game exporting and importing of character data hosted on Curse. The Addon does not perform calculations like Rawr, it simply shows your exported Rawr data in wow tooltips and lets you export your character to Rawr (including ba...VG-Ripper & PG-Ripper: PG-Ripper 1.4.13: changes NEW: Added Support for "ImageJumbo.com" links FIXED: Ripping of Threads with multiple pagesJson.NET: Json.NET 5.0 Release 6: New feature - Added serialized/deserialized JSON to verbose tracing New feature - Added support for using type name handling with ISerializable content Fix - Fixed not using default serializer settings with primitive values and JToken.ToObject Fix - Fixed error writing BigIntegers with JsonWriter.WriteToken Fix - Fixed serializing and deserializing flag enums with EnumMember attribute Fix - Fixed error deserializing interfaces with a valid type converter Fix - Fixed error deser...Biller: Biller 1.49: This release fixes company sales statisticsNew Projectsapiviewer: Documentation viewer for your service API.ArgusLib: Set of libraries I use in most of my projects.arwani: this is armani project.Blue Mercs Data Gateway: The Data Gateway is an open source project which simplifies coding fluently database SQL statements, stored procedure, connections and transactions.Convert Hashtable Rows into DataTable Columns in C#: Simplest way to convert a Hashtable into a DataTable with all the Hashtable rows converted into DataTable columns.everynet: EveryNet is an internet service provider servicing homes Fraktalysator: Software to visualize fractals such as the Mandelbrot Set. Still in early development state.Free BarCode API for .NET: Freee BarCode API for .NETGraphic filters in WPF: FiltersGrid Plugin: Grid Plugin , Turn your <table> into a fully functional price grid.mediamonitor: this is mediamonitor project.MyCodingStuffs: This solution includes C#, WCF, MVC4.0, ASP.net libraries.OpenErp .Net Connector: Access to OpenErp from .NetPhong and Flat shading: Phong shadingPixel Replacer: The Pixel Replacer is a simple library for replacing pixel colors with a new color, by setting a filter rule.plainetl in vb.net: a one db to another db transform, threaded, commandline tool, ... initially created to get a flat-File db (FoxPro) into a mssql.Programming in HTML5 with JavaScript and CSS3: Contains material developed while visiting a Microsoft course for the MCSD exam 70-480ProjectLinker2012: This tool helps to automatically create and maintain links from a source project to a target project to share code that is common to Silverlight and WPF.SALDERA Project: SALDERA TEST Project Summary Mire lesz ez jó? Majd Kiderül.TCPMessageServer: Simple TCP Client/Server used to pass an object between client and serverThats-Me Dot Net API: Thats-Me Dot Net API is a library which implements the Thats-Me.ch API for the Dot Net Framework.T-Sql Code Documentor: Document T-SQL Code and Extract Comments for all objects in a database.Windows 8 App Design Reference Template: Measurement: Measurement template will help if you want to build an app which addresses Mass/Weight, Distance/Length, Capacity/Volume etc. measurement placeholders.Windows 8 App Design Reference Template: Weather Clock: Weather Clock Template will help if you want to build an app which has the features to add Current/Previous day temperatures and add cities for coverage. Windows 8 App Desing Reference Template: Education Big Picture: Education Big Picture Template will help if you want to build an app which has an option for showcasing campus details, courses, student life etc dataWinodws 8 App Design Reference Template: Social Feed: Social Feed template will help if you want to build an app which has the Messaging, Facebook, twitter feeds sections. WP7FlacPlayer: Implemented JFlacLib in C# A simple player to play flac in windows phone system

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  • What are my options for selling software independently on Windows?

    - by technomalogical
    I am looking to port a tool from the Mac app store over to Windows, the platform where I spend most of my time these days. I've spoken with the author of the original app and we've begun talking about licensing options should I decide to sell the application, and it seems like it would be feasible. I've never sold software independently, let alone on Windows. That I know of, there is not (yet) an equivalent app store for Windows (maybe one coming with Windows 8). Assuming my product was done today and I was ready to go to market, what options do I have for selling software for Windows as an independent developer or Micro-ISV? I know can sell it through my own website and accept PayPal, but are there options that will offer more visibility, similar to that of the Apple app stores? Any options to avoid?

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  • White Hat Plus Black Hat Equals Grey Hat SEO

    SEO or search engine optimization is one of the many popular Internet marketing techniques used today. Part of its popularity lies with its techniques. Unlike SEM or search engine marketing which dea... [Author: Margarette Mcbride - Web Design and Development - May 03, 2010]

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  • Get Free Backlinks

    Having a good ranking from Google or Yahoo, or any other search engine is the key of online business. No matter how good is the product that you are selling online, nobody will buy it if it can not be found on the Internet. Search engine optimization helps you to increase the coefficient of ratings and the backlinks have an important role.

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  • How to associate all file types within Wine with its corresponding native application?

    - by MestreLion
    This is easily done for a single file type, as answered in How to associate a file type within Wine with a native application?, by creating a .reg for the desired filetype. But this is for AVI only. I use some wine apps (uTorrent, Soulseek, Eudora, to name a few) that can launch a wide range of files. Email attachments, for example, can be JPG, DOC, PDF, PPS... its impossible (and not desirable) to track down all possible file types that one may receive in an email or download in a torrent. So I neeed a solution to be more generic and broad. I need the file association to honor whatever native app is currently configured. And I want this to be done for all file types configured in my system. I've already figured out how to make the solution generic. Simply replacing the launched app in .reg for winebrowser, like this: [HKEY_CLASSES_ROOT\.pdf] @="PDFfile" "Content Type"="application/pdf" [HKEY_CLASSES_ROOT\PDFfile\Shell\Open\command] @="C:\\windows\\system32\\winebrowser.exe \"%1\"" Ive tested this and it works correctly. Since winebrowser uses xdg-open as a backend, and converts my windows path to a Unix one, the correct (Linux) app is launched. So I need a "batch" updater to wine's registry, sort of a wine-update-associations script that I can run whenever a new app is installed. Maybe a tool that can: List all Mime Types types in my system that have a default, installed app associated Extract all the needed info (glob, mime type, etc) Generate the .REG file in the above format The tricky part is: i've searched a LOT to find info about how association is done in Ubuntu 10.10 onwards, and documentation is scarce and confusing, to say the least. Freedesktop.org has no complete spec, and even Gnome docs are obsolete. So far I've gathered 4 files that contain association info, but im clueless on which (or why) to use, or how to use them to generate the .reg file: ~/.local/share/applications/mimeapps.list ~/.local/share/applications/miminfo.cache /usr/share/applications/miminfo.cache /etc/gnome/defaults.list Any help, script or explanation would be greatly appreciated! Thanks!

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  • SEO-ing Your Website

    What is SEO? The abbreviation SEO stands for Search Engine Optimization. It is the process of improving the volume of traffic to a web site via search engines through relevant keywords. The more traffic a website gets, the higher his ranking will be in search engine results. This is essentially SEO promotion and it is used by many webmasters today.

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  • With Slick, how to change the resolution during gameplay?

    - by TheLima
    I am developing a tile-based strategy game using Java and the Slick API. So far so good, but I've come to a standstill on my options menu. I have plans for the user to be able to change the resolution during gameplay (it is pretty common, after all). I can already change to fullscreen and back to windowed, this was pretty simple... //"fullScreenOption" is a checkbox-like button. if (fullScreenOption.isMouseOver(mouseX, mouseY)) { if (input.isMouseButtonDown(Input.MOUSE_LEFT_BUTTON)) { fullScreenOption.state = !fullScreenOption.state; container.setFullscreen(fullScreenOption.state); } } But the container class (Implemented by Slick, not me), contrary to my previous beliefs, does not seem to have any resolution-change functions! And that's pretty much the situation...I know it's possible, but i don't know how to do it, nor what is the class responsible! The AppGameContainer class, used on the very start of the game's initialization, is the only place with any functions for changing the display-mode that I've found so far, but it's only used at the very start, and i haven't found a way to travel back to it from my options menu. //This is my implementation of it... public static void main(String[] args) throws SlickException { AppGameContainer app = new AppGameContainer(new Main()); // app.setTargetFrameRate(60); app.setVSync(true); app.setDisplayMode(800, 600, false); app.start(); } I can define it as a static global on the Main, but it's probably a (very) bad way to do it...

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  • CCUserDefault, iOS/Android and game updates

    - by Luke
    My game uses cocos2d-x and will be published on iOS platform first, later on Android. I save a lot of things with CCUserDefault (scores, which level was completed, number of coins taken, etc...). But now I have a big doubt. What will happen when the game will receive its first update? CCUserDefault uses an XML file stored somewhere in the app storage space. This file is created and retained until one uninstalls the app. I am wondering what happens when the app is updated. Will the old XML file be maintained? Because if not, how should I handle app updates (updates in the sense that 2, 3 or more new level packages will be added, but the informations about the old ones, like scores, which level was finished and which not, number of coins, etc., need absolutely not to be lost)?

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  • Online ALTER TABLE in MySQL 5.6

    - by Marko Mäkelä
    This is the low-level view of data dictionary language (DDL) operations in the InnoDB storage engine in MySQL 5.6. John Russell gave a more high-level view in his blog post April 2012 Labs Release – Online DDL Improvements. MySQL before the InnoDB Plugin Traditionally, the MySQL storage engine interface has taken a minimalistic approach to data definition language. The only natively supported operations were CREATE TABLE, DROP TABLE and RENAME TABLE. Consider the following example: CREATE TABLE t(a INT); INSERT INTO t VALUES (1),(2),(3); CREATE INDEX a ON t(a); DROP TABLE t; The CREATE INDEX statement would be executed roughly as follows: CREATE TABLE temp(a INT, INDEX(a)); INSERT INTO temp SELECT * FROM t; RENAME TABLE t TO temp2; RENAME TABLE temp TO t; DROP TABLE temp2; You could imagine that the database could crash when copying all rows from the original table to the new one. For example, it could run out of file space. Then, on restart, InnoDB would roll back the huge INSERT transaction. To fix things a little, a hack was added to ha_innobase::write_row for committing the transaction every 10,000 rows. Still, it was frustrating that even a simple DROP INDEX would make the table unavailable for modifications for a long time. Fast Index Creation in the InnoDB Plugin of MySQL 5.1 MySQL 5.1 introduced a new interface for CREATE INDEX and DROP INDEX. The old table-copying approach can still be forced by SET old_alter_table=0. This interface is used in MySQL 5.5 and in the InnoDB Plugin for MySQL 5.1. Apart from the ability to do a quick DROP INDEX, the main advantage is that InnoDB will execute a merge-sort algorithm before inserting the index records into each index that is being created. This should speed up the insert into the secondary index B-trees and potentially result in a better B-tree fill factor. The 5.1 ALTER TABLE interface was not perfect. For example, DROP FOREIGN KEY still invoked the table copy. Renaming columns could conflict with InnoDB foreign key constraints. Combining ADD KEY and DROP KEY in ALTER TABLE was problematic and not atomic inside the storage engine. The ALTER TABLE interface in MySQL 5.6 The ALTER TABLE storage engine interface was completely rewritten in MySQL 5.6. Instead of introducing a method call for every conceivable operation, MySQL 5.6 introduced a handful of methods, and data structures that keep track of the requested changes. In MySQL 5.6, online ALTER TABLE operation can be requested by specifying LOCK=NONE. Also LOCK=SHARED and LOCK=EXCLUSIVE are available. The old-style table copying can be requested by ALGORITHM=COPY. That one will require at least LOCK=SHARED. From the InnoDB point of view, anything that is possible with LOCK=EXCLUSIVE is also possible with LOCK=SHARED. Most ALGORITHM=INPLACE operations inside InnoDB can be executed online (LOCK=NONE). InnoDB will always require an exclusive table lock in two phases of the operation. The execution phases are tied to a number of methods: handler::check_if_supported_inplace_alter Checks if the storage engine can perform all requested operations, and if so, what kind of locking is needed. handler::prepare_inplace_alter_table InnoDB uses this method to set up the data dictionary cache for upcoming CREATE INDEX operation. We need stubs for the new indexes, so that we can keep track of changes to the table during online index creation. Also, crash recovery would drop any indexes that were incomplete at the time of the crash. handler::inplace_alter_table In InnoDB, this method is used for creating secondary indexes or for rebuilding the table. This is the ‘main’ phase that can be executed online (with concurrent writes to the table). handler::commit_inplace_alter_table This is where the operation is committed or rolled back. Here, InnoDB would drop any indexes, rename any columns, drop or add foreign keys, and finalize a table rebuild or index creation. It would also discard any logs that were set up for online index creation or table rebuild. The prepare and commit phases require an exclusive lock, blocking all access to the table. If MySQL times out while upgrading the table meta-data lock for the commit phase, it will roll back the ALTER TABLE operation. In MySQL 5.6, data definition language operations are still not fully atomic, because the data dictionary is split. Part of it is inside InnoDB data dictionary tables. Part of the information is only available in the *.frm file, which is not covered by any crash recovery log. But, there is a single commit phase inside the storage engine. Online Secondary Index Creation It may occur that an index needs to be created on a new column to speed up queries. But, it may be unacceptable to block modifications on the table while creating the index. It turns out that it is conceptually not so hard to support online index creation. All we need is some more execution phases: Set up a stub for the index, for logging changes. Scan the table for index records. Sort the index records. Bulk load the index records. Apply the logged changes. Replace the stub with the actual index. Threads that modify the table will log the operations to the logs of each index that is being created. Errors, such as log overflow or uniqueness violations, will only be flagged by the ALTER TABLE thread. The log is conceptually similar to the InnoDB change buffer. The bulk load of index records will bypass record locking. We still generate redo log for writing the index pages. It would suffice to log page allocations only, and to flush the index pages from the buffer pool to the file system upon completion. Native ALTER TABLE Starting with MySQL 5.6, InnoDB supports most ALTER TABLE operations natively. The notable exceptions are changes to the column type, ADD FOREIGN KEY except when foreign_key_checks=0, and changes to tables that contain FULLTEXT indexes. The keyword ALGORITHM=INPLACE is somewhat misleading, because certain operations cannot be performed in-place. For example, changing the ROW_FORMAT of a table requires a rebuild. Online operation (LOCK=NONE) is not allowed in the following cases: when adding an AUTO_INCREMENT column, when the table contains FULLTEXT indexes or a hidden FTS_DOC_ID column, or when there are FOREIGN KEY constraints referring to the table, with ON…CASCADE or ON…SET NULL option. The FOREIGN KEY limitations are needed, because MySQL does not acquire meta-data locks on the child or parent tables when executing SQL statements. Theoretically, InnoDB could support operations like ADD COLUMN and DROP COLUMN in-place, by lazily converting the table to a newer format. This would require that the data dictionary keep multiple versions of the table definition. For simplicity, we will copy the entire table, even for DROP COLUMN. The bulk copying of the table will bypass record locking and undo logging. For facilitating online operation, a temporary log will be associated with the clustered index of table. Threads that modify the table will also write the changes to the log. When altering the table, we skip all records that have been marked for deletion. In this way, we can simply discard any undo log records that were not yet purged from the original table. Off-page columns, or BLOBs, are an important consideration. We suspend the purge of delete-marked records if it would free any off-page columns from the old table. This is because the BLOBs can be needed when applying changes from the log. We have special logging for handling the ROLLBACK of an INSERT that inserted new off-page columns. This is because the columns will be freed at rollback.

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  • Is there a way to check if redistributed code has been altered?

    - by onlineapplab.com
    I would like to redistribute my app (PHP) in a way that the user gets the front end (presentation) layer which is using the API on my server through a web service. I want the user to be able to alter his part of the app but at the same time exclude such altered app from the normal support and offer support on pay by the hour basis. Is there a way to check if the source code was altered? Only solution I can think of would be to get check sums of all the files then send it through my API and compare them with the original app. Is there any more secure way to do it so it would be harder for the user to break such protection?

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  • The Benefits of Doing Proper Keyword Research

    First of all, let's get one thing straight: keyword research is the hands down the absolute base for any marketing or search engine optimization campaign. You can't get absolutely anything done without doing proper keyword research first. The simple reason behind this fact is that you will be needing the results provided by keyword services for everything from the actual content of your website, to future search engine optimization campaigns, pay per click campaigns, and so on.

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  • Basic SEO Mistakes

    Search engine optimization mistakes are quite common, and they are made by both seasoned SEO experts, and those who are new to it alike. Search engine optimization is a precise practice, thus there is no such thing as a tiny SEO mistake. The reason for this is that all SEO mistakes, big or small, all produce repercussions, which could affect the ranking if your website in one way or another.

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  • Google I/O Sandbox Case Study: WebFilings

    Google I/O Sandbox Case Study: WebFilings We interviewed WebFilings at the Google I/O Sandbox on May 10, 2011 and they explained to us the benefits of using App Engine to build their website. WebFilings provides a secure, cloud-based end-to-end financial reporting solution for SEC reporting companies. For more information on App Engine Developers, visit: code.google.com For more information on WebFilings, visit: www.webfilings.com From: GoogleDevelopers Views: 29 1 ratings Time: 02:31 More in Science & Technology

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