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• Product Update Bulletin: Oracle Solaris Cluster October 2013

  - by uwes

  Announcing new qualifications and general news for the Oracle Solaris Cluster product. Hardware Qualifications Sun Server X4-2 and X4-2L servers, Sun Blade X4-2B server module with Oracle Solaris Cluster 3.3 Sun Storage 16 Gb Fibre Channel ExpressModule Universal HBA, Emulex Oracle Dual Port QDR InfiniBand Adapter M3 Software Qualifications Oracle Database 12c Real Application Cluster with Oracle Solaris Cluster 4.1 Oracle Database 11.2.0.4 single instance and RAC with Oracle Solaris Cluster 4.1 Oracle VM server for SPARC 3.1 SAP Netweaver with new kernel versions ZFS Storage Appliance Kit version 2011.1.7.0 and 2013.1.0.0 Application monitoring in Oracle VM for SPARC failover guest domain Storage Partner Update Oracle Solaris Cluster 3.3 3/13 with the HDS Enterprise Storage arrays EMC SRDF for Oracle database 12c RAC in Oracle Solaris Cluster 4.1 geo cluster configuration Oracle Solaris Cluster References Korea Enterprise Data, HDFC Securities, Dealis Fund Operations Web Updates New blog entry: Oracle Solaris 10 Brand Zone cluster Solaris Application Engineering website now includes Oracle Solaris Cluster application support information Please read the Oracle Solaris Cluster Product Update Bulletin on Oracle HW TRC for more details. (If you are not registered on Oracle HW TRC, click here ... and follow the instructions..) _____________________________________________________________________ For More Information Go To:Oracle.com Oracle Solaris Cluster page Oracle Technology Network Oracle Solaris Cluster pageOracle Solaris Cluster mos communityPartner web Oracle Solaris Cluster pageOracle Solaris Cluster Blog Solaris.us.oracle.com page

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• How to set printer permissions using PowerShell / some other script?

  - by Borek

  I need to update printer's permissions in a script, i.e. do the same as I would manually do this way: Open Devices and Printers applet Double-click the default printer (open its queue) Go to Printer - Properties In the properties dialog, go to Security tab Change permissions for Everyone (e.g., check Manage documents permissions) How to do that? For example, in PowerShell, I can do Get-WmiObject -class win32_printer -filter Default=True to get the default printer and there are then methods getSecurityDescriptor() and setSecurityDescriptor() but for instance this command: (Get-WmiObject -class win32_printer -filter Default=True).getsecuritydescriptor().Descriptor return null so I'm not sure if I'm doing it the right way. Does anyone have a working example to set printer permissions? Am I on the right path or should I use something other than WMI entirely? Thanks.

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• How to use shared_ptr for COM interface pointers

  - by Seefer

  I've been reading about various usage advice relating to the new c++ standard smart pointers unique_ptr, shared_ptr and weak_ptr and generally 'grok' what they are about when I'm writing my own code that declares and consumes them. However, all the discussions I've read seem restricted to this simple usage situation where the programmer is using smart in his/her own code, with no real discussion on techniques when having to work with libraries that expect raw pointers or other types of 'smart pointers' such as COM interface pointers. Specifically I'm learning my way through C++ by attempting to get a standard Win32 real-time game loop up and running that uses Direct2D & DirectWrite to render text to the display showing frames per second. My first task with Direct2D is in creating a Direct2D Factory object with the following code from the Direct2D examples on MSDN: ID2D1Factory* pD2DFactory = nullptr; HRESULT hr = D2D1CreateFactory(D2D1_FACTORY_TYPE_SINGLE_THREADED, &pD2DFactory); pD2DFactory is obviously an 'out' parameter and it's here where I become uncertain how to make use of smart pointers in this context, if indeed it's possible. My inexperienced C++ mind tells me I have two problems: With pD2DFactory being a COM interface pointer type, how would smart_ptr work with the Add() / Release() member functions for a COM object instance? Are smart pointers able to be passed to functions in situations where the function is using an 'out' pointer parameter technique? I did experiment with the alternative of using _com_ptr_t in the comip.h header file to help with pointer lifetime management and declared the pD2DFactory pointer with the following code: _com_ptr_t<_com_IIID<pD2DFactory, &__uuidof(pD2DFactory)>> pD2DFactory = nullptr; and it appears to work so far but, as you can see, the syntax is cumbersome :) So, I was wondering if any C++ gurus here could confirm whether smart pointers are able to help in cases like this and provide examples of usage, or point me to more in-depth discussions of smart pointer usage when needing to work with other code libraries that know nothing of them. Or is it simply a case of my trying to use the wrong tool for the job? :)

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• Checking All Checkboxes in a GridView Using jQuery

  In May 2006 I wrote two articles that showed how to add a column of checkboxes to a GridView and offer the ability for users to check (or uncheck) all checkboxes in the column with a single click of the mouse. The first article, Checking All CheckBoxes in a GridView, showed how to add "Check All" and "Uncheck All" buttons to the page above the GridView that, when clicked, checked or unchecked all of the checkboxes. The second article, Checking All CheckBoxes in a GridView Using Client-Side Script and a Check All CheckBox, detailed how to add a checkbox to the checkbox column in the grid's header row that would check or uncheck all checkboxes in the column. Both articles showed how to implement such functionality on the client-side, thereby removing the need for a postback. The JavaScript presented in these two previous articles still works, but the techniques used are a bit antiquated and hamfisted given the advances made in JavaScript programming over the past few years. For instance, the script presented in the previous articles uses server-side code in the GridView's DataBound event handler to assign a client-side onclick event handler to each checkbox. While this works, it violates the tenets of unobtrusive JavaScript, which is a design guideline for JavaScript programming that encourages a clean separation of functionality from presentation. (Ideally, event handlers for HTML elements are defined in script.) Also, the quantity of JavaScript used in the two previous articles is quite hefty compared to the amount of code that would be needed using modern JavaScript libraries like jQuery. This article presents updated JavaScript for checking (and unchecking) all checkboxes within a GridView. The two examples from the previous articles - checking/unchecking all checkboxes using a button and checking/unchecking all checkboxes using a checkbox in the header row - are reimplemented here using jQuery and unobtrusive JavaScript techniques. Read on to learn more! Read More >

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• Lenovo ThinkPad L520 slows down when AC power adapter is plugged in

  - by Aamir

  I have a new laptop Lenovo ThinkPad L520 (7859-5BG) Core i5-2520M(2.5GHz) with 4GB RAM. Having installed Ubuntu 11.10 32-bit, while browsing with Chrome on GNOME classic (no effects), I noticed 173% CPU usage by chrome browser process, and the system slowly got very very slow, Now, at this stage as I removed the power adapter, the system suddenly got faster (and stopped the lagging behavior) and CPU usage drops down to 48% !! Observation 1: I was browsing through chrome when my system seemed to be seriously lagging, so I killed chrome to see if it gets any faster. But there remained no difference. Notice that CPU usage was a bit strange here. It showed no high activity, but as soon as I would click on applications in gnome panel, it would shoot CPU usage to 70, or 80 or 90 or 143% etc. depending on how quickly i clicked back and forth. At this instance I removed by AC adapter of my laptop, and suddenly system got fine. So i again clicked on gnome panel, and noticed that it now took only 7% or 12% or 13% at max, with same kind of clicks in application menu. Observation 2: At the other times, with AC adapter plugged in, top indicates four instances of chromium taking 90%, 60%, 47% and 2% (for example), and then once I take out the AC adapter same processes take lesser CPU all of a sudden Intermediate conclusions: What does this indicate ? I cannot figure out any "other" process in "top" that is suddenly being triggered, its the same process that hogs up my CPU once AC power is plugged in ! NOTE: the problem is now CONFIRMED, as i can repeat that when I have power adapter plugged in ! Can anyone tell me what exactly does this indicate ? What is wrong, is it some bug with power management or what ?

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• Both servers running keepalived become master

  - by pcent

  After a network failure,both servers running keepalived become master. When the network is reestablished, both keep the MASTER state. What could be causing it? Edited: Another information that might be relevant, each server has two NICs. Here is the virtual instance configuration: vrrp_instance VGAPP { interface eth0 virtual_router_id 61 state BACKUP nopreempt priority 50 advert_int 3 virtual_ipaddress { 10.26.57.61/24 } track_interface { eth0 } track_script { jboss_check #tomcat_check #interface_check #interface_check02 } notify_master "/opt/keepalived/scripts/set_state.sh MASTER" notify_backup "/opt/keepalived/scripts/set_state.sh BACKUP" notify_fault "/opt/keepalived/scripts/set_state.sh FAULT" notify_stop "/opt/keepalived/scripts/set_state.sh STOPPED"}

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• Overlapping appointments in Outlook 2003

  - by iansinke

  I'm using Microsoft Outlook 2003 (Home and Student, if that makes any difference, which I doubt) as my calendar, and I have one minor gripe: it can't really handle appointments that don't begin and end right on the half-hour mark. For instance, if I have a class that ends at 9:22 AM and another class that begins at 9:27 AM, they will appear to overlap in the day view. Not a big deal, but it bugs me nonetheless. Anybody know of a hack or patch that will fix this issue? I've searched the Outlook documentation as well as Google to no avail.

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• Is inconsistent formatting a sign of a sloppy programmer?

  - by dreza

  I understand that everyone has their own style of programming and that you should be able to read other people's styles and accept it for what it is. However, would one be considered a sloppy programmer if one's style of coding was inconsistent across whatever standard they were working against? Some example of inconsistencies might be: Sometimes naming private variables with _ and sometimes not Sometimes having varying indentations within code blocks Not aligning braces up i.e. same column if using start using new line style Spacing not always consistent around operators i.e. p=p+1, p+=1 vs other times p =p+1 or p = p + 1 etc Is this even something that as a programmer I should be concerned with addressing? Or is it such a minor nit picking thing that at the end of the day I should just not worry about it and worry about what the end user sees and whether the code works rather than how it looks while working? Is it sloppy programming or just over obsessive nit picking? EDIT: After some excellent comments I realized I may have left out some information in my question. This question came about after reviewing another colleagues code check-in and noticing some of these things and then realizing that I've seen these kind of in-consistencies in previous check-ins. It then got me thinking about my code and whether I do the same things and noticed that I typically don't etc I'm not suggesting his technique is either bad or good in this question or whether his way of doing things is right or wrong. EDIT: To answer some queries to some more good feed back. The specific instance this review occurred in was using Visual Studio 2010 and programming in c# so I don't think the editor would cause any issues. In fact it should only help I would hope. Sorry if I left that piece of info out and it effects any current answers. I was trying to be a bit more generic in understanding if this would be considered sloppy etc. And to add an even more specific example of a code piece I saw during reading of the check-in: foreach(var block in Blocks) { // .. some other code in here foreach(var movement in movements) { movement.Moved.Zero(); } // the un-formatted brace } Such a minor thing I know, but many small things add up(???), and I did have to double glance at the code at the time to see where everything lined up I guess. Please note this code was formatted appropriately before this check-in. EDIT: After reading some great answers and varying thoughts, the summary I've taken from this was. It's not necessarily a sign of a sloppy programmer however as programmers we have a duty (to ourselves and other programmers) to make the code as readable as possible to assist in further ongoing development. However it can hint at inadequacies which is something that is only possible to review on a case by case (person by person) basis. There are many reasons why this might occur. They should be taken in context and worked through with the person/people involved if reasonable. We have a duty to try and help all programmers become better programmers! In the good old days when development was done using good old notepad (or other simple text editing tool) this occurred much more frequently. However we have the assistance of modern IDE's now so although we shouldn't necessarily become OTT about this, it should still probably be addressed to some degree. We as programmers vary in our standards, styles and approaches to solutions. However it seems that in general we all take PRIDE in our work and as a trait it is something that can stand programmers apart. Making something to the best of our abilities both internal (code) and external (end user result) goes along way to giving us that big fat pat on the back that we may not go looking for but swells our heart with pride. And finally to quote CrazyEddie from his post below. Don't sweat the small stuff

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• Hiding some users in the user list of the OSX 10.6 login panel

  - by Lohoris

  Is there a way to show only some users in the login panel? I'm using OSX 10.6, and if I recall correctly I did something like that in a distant past but I really can't find out how. In the system preferences there seem to be nothing like that (neither in Accounts nor in Security, for instance), and Tinkertool does not do that. Google didn't help. edit: I hoped there was a graphical solution, such as while hiding them from the first screen, having also a button like "show all". I guess there isn't or somebody would have answered. Maybe I'll just change the usernames adding leading Z at the start of the usernames of the ones to "hide", so they'll appear lower in the list... :/

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• Handling changes to data types and entries in a database migration

  - by jandjorgensen

  I'm fully redesigning a site that indexes a number of articles with basic search functionality. The previous site was written about a decade ago, and I'm salvaging about 30,000 entries with data stored in less-than-ideal formats. While I'm moving from MSSQL to MySQL, I don't need to make any "live" changes, so this is not a production-level migration issue so much as a redesign. For instance, dates are stored the same as tags/subjects about the articles, but in strings as "YYYYMMDDd" (the lowercase d stands for "date" in the string). Essentially, before or after I move from the previous database format to a new one, I'm going to need to do a lot of replacement of individual entries. While I understand how to do operations with regular expressions in non-database issues, my database experience isn't robust enough to know the best way to handle this. What is the best (or standard) way to handle major changes like this? Is there an SQL operation I should be looking into? Please let me know if the problem isn't clear--I'm not entirely sure what kind of answer I'm looking for.

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• ORA-12705: invalid or unknown NLS parameter value specified

  - by viky

  I have a j2ee application hosted on jboss and linux platform. When I try to access the application , I see following error in server.log file. ORA-12705: invalid or unknown NLS parameter value specified When I point the same jboss instance to a different schema, the application works fine. I tried to go through few forum and found that the NLS parameter settings are fine. Can anyone help. Jboss version = 4.0.2 DB version = oracle 10.2 output of locale command on linux $ locale LANG=en_US.UTF-8 LC_CTYPE="en_US.UTF-8" LC_NUMERIC="en_US.UTF-8" LC_TIME="en_US.UTF-8" LC_COLLATE="en_US.UTF-8" LC_MONETARY="en_US.UTF-8" LC_MESSAGES="en_US.UTF-8" LC_PAPER="en_US.UTF-8" LC_NAME="en_US.UTF-8" LC_ADDRESS="en_US.UTF-8" LC_TELEPHONE="en_US.UTF-8" LC_MEASUREMENT="en_US.UTF-8" LC_IDENTIFICATION="en_US.UTF-8" LC_ALL=

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• Naming a class that decides to retrieve things from cache or a service + architecture evaluation

  - by Thomas Stock

  Hi, I'm a junior developer and I'm working on a pet project that I want to learn as much as possible from. I have the following scenario: There's a WCF service that I use to retrieve and update data, lets say Cars. So it's called CarWCFService and has a GetCars(), SaveCar(), ... . It implements interface ICarService. This isn't the Actual WCF service but more like a wrapper around it. Upon retrieving data from the service, I want to store them in local memory, as cache. I have made a class for this called CarCacheService which also implements interface ICarService. (I will explain later why it implements ICarService) I don't want client code to be calling these implementations. Instead, I want to create a third implementation for ICarService that tries to read from the CarCacheService before calling the WCFCarService, stores retrieved data in the CarCacheService, etc. 3 questions: How do I name this third class? I was thinking about something as simple as CarService. This does not really says what the service does exactly, tho. Is the naming for the other classes good? Would this naming and architecture be obvious for future programmers? This is my biggest concern. Does this architecture make sense? The reason that I implement ICarService on the CarCacheService is mainly because it allows me to fake the WCFService while debugging. I can store dummy data in a CarCacheService instance and pass it to the CarService, together with an(other) empty CarCacheService. If I made CacheCarService and WCFService public I could let client code decide if they want to drop the caching and just work directly on the WCFService.

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• Alternative to Windows Home Server (WHS) backups

  - by Adam Tegen

  Since Microsoft announced the end of life for WHS, are there any alternatives? Specifically, I am interested in recovering from a catastrophic disk failure with WHS. For example, this is my ideal scenario when a desktop hard-drive fails (has a bad virus, etc): Install a disk of the same size or greater Boot the desktop with the Recovery Disc Point the recovery application at the WHS Pick the machine, the drive(s) and the date of the backup Have a couple beers Reboot to a working machine as if nothing happened. I would need to slap multiple disks in the machine without raid. It sounds like LVM will work here. It would be nice, but not required to have de-duplication of files when multiple machines are backed up. (Single Instance Storage)

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• Entering data into AD LDS

  - by Robert Koritnik

  I need some help configuring AD LDS (Active Directory Lightweight Directory Services). I'm not an administrator, have never configured domains and I don't have a clue how to add new users to existing domains. The thing is I need to develop an app that must be connected to AD. I've chosen AD LDS because I can install it on Windows 7 and it acts as an active directory even though there's no dmain controller present in the network. What I've done so far: I've installed AD LDS I've added a new instance with appication directory partition name DN=Air,DC=Watanabe,DC=pri I can connect to it using ADSI Edit and see all kinds of strange But now I don't know what to do? When it opens I can see the window below, but where's next? Can anybody give me some guidelines, how can I add domain users, so I can use them in my app AD required app?

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• Bash - Program is writing directly to terminal

  - by Salis

  Valve's dedicated server for the Source Engine (srcds_run) on Linux writes directly to the terminal, not stdout. I want to run it as an /etc/init.d daemon on Debian 6, and I'd like to redirect/capture the output to a file. How can I do that? And better yet, why would they output directly to the terminal, is there any benefit in doing that? I suppose I could start another bash instance just for srcds_run, but that seems like a dirty solution, and I still don't know how to redirect the output.

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• Swap, Swapiness and Standby: swapping starts when waking up

  - by mdo

  I'm running running Ubuntu 12.04 on a Lenovo W500 (Core2Duo T9400, 4GB Ram) Current kernel: 3.2.0-32-generic #51-Ubuntu SMP Wed Sep 26 21:33:09 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux -- but the problems exists since a couple of months, surviving quite a few software (includig kernel) updates I regularly put my machine into suspend-to-ram (S3) and when the machine comes back up Ubuntu starts to swap out processes. I was able to observe that the used swap-space starts to grow right after the box returns. See munin graphs below, the gap (obviously) shows the timeframe in STR. Needless to say that the box becomes unusable while swapping, load goes up beyond 10. What I've done so far: lowered swappiness from default (60) to 10 (via /etc/sysctl.conf: vm.swappiness=10) -- this has improved the situation much, but sometimes the problem comes back, I have not found a trigger (like memory usage) for this for now lowered swappiness to 5 -- perhaps this has brought an improvement again Before going to STR the box ran stable without (swapping) problems for hours. Today when the issue showed up again I used this script (- http://stackoverflow.com/questions/479953/how-to-find-out-which-processes-are-swapping-in-linux) to find what processes have the most used swap space. The result after the swap orgy is like that (all PIDs with more than 10M usage): Overall swap used: 2121344 kB ======================================== kB pid name ======================================== 439520 17491 java 208148 22719 firefox 136640 4337 /usr/bin/quodli 120852 5271 chrome 81832 5264 chrome 74284 17003 chrome 65368 16960 chrome 57088 3675 chrome 56184 30923 chrome 54412 11331 chrome 54264 3878 chrome 51508 18382 chrome 50088 3163 zeitgeist-fts 49772 15543 chrome 41344 15355 compiz 35040 1161 mysqld 32124 18374 chrome 30940 11339 chrome 30044 5752 chrome 28780 4235 plugin-containe 24576 31246 empathy-chat 23840 17703 chrome 22512 3207 ubuntuone-syncd 21588 1937 ntop 18336 2021 asterisk 17200 3915 chrome 13964 1935 Xorg 12036 10679 chrome 11104 30782 empathy 11056 2889 python 10932 16565 knotify4 The java instance at the top is IntelliJ. IntelliJ, Firefox and Chrome also were all used right before the box was put to STR. So my question is: can I somehow prevent these swapouts AND why do they happen? Is it perhaps related to some misidentification of idle processes? I'm not looking for resolutions like: turn off swap buy more RAM Thanks in advance!

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• Universal Windows XP With Ghost and Sysprep

  - by RobertPitt

  Hey I have an idea but im not sure whether it is possible and looking for advice on how to accomplish this. If i was to try and deploy Windows XP Sysprepped image from a Lenovo Thinkcentre 6073-CTO and tried to drop it onto a Dell Optiplex for instance I would get a BSOD due to the hardware change. What im looking to do is create a few images like so: Windows XP x86 SP3 (Sysprepped) Windows XP x64 SP3 (Sysprepped) ... So that we can use throughout the organization without having to create individual images per computer type. Is there anyway's to accomplish this such as some modification of files pre-ghost, removal a certain drivers pre-sysprep Any advice is appreciated.

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• Introducing NFakeMail

  - by João Angelo

  Ever had to resort to custom code to control emails sent by an application during integration and/or system testing? If you answered yes then you should definitely continue reading. NFakeMail makes it easier for developers to do integration/system testing on software that sends emails by providing a fake SMTP server. You’ll no longer have to manually validate the email sending process. It’s developed in C# and IronPython and targets the .NET 4.0 framework. With NFakeMail you can easily automate the testing of components that rely on sending mails while doing its job. Let’s take a look at some sample code, we start with a simple class containing a method that sends emails. class Notifier { public void Notify() { using (var smtpClient = new SmtpClient("localhost", 10025)) { smtpClient.Send("[email protected]", "[email protected]", "S1", "."); smtpClient.Send("[email protected]", "[email protected]", "S2", ".."); } } } Then to automate the tests for this method we only need to the following: [Test] public void Notify_T001() { using (var server = new FakeSmtpServer(10025)) { new Notifier().Notify(); // Verifies two messages are received in the next five seconds var messages = server.WaitForMessages(count: 2, timeout: 5000); // Verifies the message sender Debug.Assert(messages.All(m => m.From.Address == "[email protected]")); } } The created FakeSmtpServer instance will act as a simple SMTP server and intercept the messages sent by the Notifier class. It’s even possible to verify some fields of each intercepted message and by default all intercepted messages are saved to the file system in MIME format.

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• Designing configuration for subobjects

  - by Stefano Borini

  I have the following situation: I have a class (let's call it Main) encapsulating a complex process. This class in turn orchestrates a sequence of subalgorithms (AlgoA, AlgoB), each one represented by an individual class. To configure Main, I have a configuration stored into a configuration object MainConfig. This object contains all the config information for AlgoA and AlgoB with their specific parameters. AlgoA has no interest to the information relative to the configuration of AlgoB, so technically I could have (and in practice I have) a contained MainConfig.AlgoAConfig and MainConfig.AlgoBConfig instances, and initialize as AlgoA(MainConfig.AlgoAConfig) and AlgoB(MainConfig.AlgoBConfig). The problem is that there is some common configuration data. One example is the printLevel. I currently have MainConfig.printLevel. I need to propagate this information to both AlgoA and AlgoB, because they have to know how much to print. MainConfig also needs to know how much to print. So the solutions available are I pass the MainConfig to AlgoA and AlgoB. This way, AlgoA has technically access to the whole configuration (even that of AlgoB) and is less self-contained I copy the MainConfig.printLevel into AlgoAConfig and AlgoBConfig, so I basically have three printLevel information repeated. I create a third configuration class PrintingConfig. I have an instance variable MainConfig.printingConfig, and then pass to AlgoA both MainConfig.AlgoAConfig and MainConfig.printingConfig. Have you ever found this situation? How did you solve it ? Which one is stylistically clearer to a new reader of the code ?

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• PHP cannot connect to AWS RDS server

  - by Eugene Lim

  I have a EC2 Instance with apchane, PHP and phpmyadmin. I have connect phpmyadmin to manage the aws RDS server. they are in the same security group. But when i try to use a php script to connect to the AWS rds server, it gave me SQLSTATE[HY000] [2003] Can't connect to MySQL server on (xxx.xxx.xxx.xxx). I did some researched, and most of them says use setsebool -P httpd_can_network_connect=1 reference: http://www.filonov.com/2009/08/07/sqlstatehy000-2003-cant-connect-to-mysql-server-on-xxx-xxx-xxx-xxx-13/ But i have no idea which server to configure? and how to?

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• Is this method pure?

  - by Thomas Levesque

  I have the following extension method: public static IEnumerable<T> Apply<T>( [NotNull] this IEnumerable<T> source, [NotNull] Action<T> action) where T : class { source.CheckArgumentNull("source"); action.CheckArgumentNull("action"); return source.ApplyIterator(action); } private static IEnumerable<T> ApplyIterator<T>(this IEnumerable<T> source, Action<T> action) where T : class { foreach (var item in source) { action(item); yield return item; } } It just applies an action to each item of the sequence before returning it. I was wondering if I should apply the Pure attribute (from Resharper annotations) to this method, and I can see arguments for and against it. Pros: strictly speaking, it is pure; just calling it on a sequence doesn't alter the sequence (it returns a new sequence) or make any observable state change calling it without using the result is clearly a mistake, since it has no effect unless the sequence is enumerated, so I'd like Resharper to warn me if I do that. Cons: even though the Apply method itself is pure, enumerating the resulting sequence will make observable state changes (which is the point of the method). For instance, items.Apply(i => i.Count++) will change the values of the items every time it's enumerated. So applying the Pure attribute is probably misleading... What do you think? Should I apply the attribute or not?

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• Task Manager: VM Size smaller than Mem usage?

  - by shoosh

  The windows XP tasks manager can show two different columns regarding the memory usage of the processes. One is called Mem Usage and the other is VM Size (not on by default, you need to activate it) From what I've gathered, VM size is the size of the entire memory space occupied by the process and Mem Usage is the amount of memory currently committed and used. This assumption is verified by most processes when the VM Size is only slightly larger than Mem Usage for instance my Outlook currently has 79,724 K in VM Size and 56,600 K in Mem Usage But it fails for other processes such as Firefox which currently has 171,900 K for Mem Usage and only 156,440 K in VM Size. How can a process use more memory than the amount of virtual memory allocated to it? So Maybe my interpretation of these columns is wrong. What do they actually mean?

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• Amazon mount EBS

  - by William

  I'm trying to mount /vol to a EBS volume on an Amazon EC2 instance. I'm formatting the device to xfs, adding "/dev/sdh /vol xfs noatime 0 0" to my /etc/fstab file, making the /vol dir and mounting it and whenever I try to do anything with that volume (create a file in /vol, cd, ls, anything) or I try to run df the server just freezes. Anyone have any idea what this might be? It's driving me crazy. Edit: It seems to freeze after I mount, has nothing to do with doing any commands to the volume it's self.

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• Jerky animation on window open/close

  - by Jan Zich

  Today, I received and installed Windows 7, and one of the first (slightly) annoying things I noticed is a visible jerk when opening of closing new windows. When I minimize or maximize already running window, the animation is smooth from beginning to end, but when I start a new program, it seems that just at the end of the animation Windows thinks for a fraction of a second. It is a bit distracting; especially since Windows 7 seems to be overall more responsive than Windows Vista. Does anybody has the same experience? Could it, for instance, a 64bit version specific issue (just in case)? I upgraded Vidia drivers, and even though my video card is not capable running latest games, it should be able to handle this (since it was OK in Vista, and since it does not look like a video issue).

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• MSSQL Replace Database in Live Web App

  - by casoninabox

  I have a web app that is currently live. I had the need to make major modifications to the database and now I need to replace the current one. My dev SQL instance is not the live one. I usually just make a backup of the new DB, blow the old one away and Restore my updated one. But now I have data I need to preserve. Most of the current tables have changed, in that extra columns have been added, all existing columns are still there and unchanged. I have access to Management Studio. What is the right way to do this?

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