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• How do I set default values on new properties for existing entities after light weight core data migration?

  - by Moritz

  I've successfully completed light weight migration on my core data model. My custom entity Vehicle received a new property 'tirePressure' which is an optional property of type double with the default value 0.00. When 'old' Vehicles are fetched from the store (Vehicles that were created before the migration took place) the value for their 'tirePressure' property is nil. (Is that expected behavior?) So I thought: "No problem, I'll just do this in the Vehicle class:" - (void)awakeFromFetch { [super awakeFromFetch]; if (nil == self.tirePressure) { [self willChangeValueForKey:@"tirePressure"]; self.tirePressure = [NSNumber numberWithDouble:0.0]; [self didChangeValueForKey:@"tirePressure"]; } } Since "change processing is explicitly disabled around" awakeFromFetch I thought the calls to willChangeValueForKey and didChangeValueForKey would mark 'tirePresure' as dirty. But they don't. Every time these Vehicles are fetched from the store 'tirePressure' continues to be nil despite having saved the context.

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• Dedicated Web Server: Dual Core 3.0GHz Verses Quad Core 2.4GHz

  - by Harry

  In most benchmark tests the Quad core isn't always ahead and frequently behind (tomshardware CPU Charts etc) BUT the test cases are primarily orientated towards the desktop/game rig. AS a Dedicated Server for a Database driven website. Should I consider more cores over speed?

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• Core data migration failing with "Can't find model for source store" but managedObjectModel for source is present

  - by Ira Cooke

  I have a cocoa application using core-data, which is now at the 4th version of its managed object model. My managed object model contains abstract entities but so far I have managed to get migration working by creating appropriate mapping models and creating my persistent store using addPersistentStoreWithType:configuration:options:error and with the NSMigratePersistentStoresAutomaticallyOption set to YES. NSDictionary *optionsDictionary = [NSDictionary dictionaryWithObject:[NSNumber numberWithBool:YES] forKey:NSMigratePersistentStoresAutomaticallyOption]; NSURL *url = [NSURL fileURLWithPath: [applicationSupportFolder stringByAppendingPathComponent: @"MyApp.xml"]]; NSError *error=nil; [theCoordinator addPersistentStoreWithType:NSXMLStoreType configuration:nil URL:url options:optionsDictionary error:&error] This works fine when I migrate from model version 3 to 4, which is a migration that involves adding attributes to several entities. Now when I try to add a new model version (version 5), the call to addPersistentStoreWithType returns nil and the error remains empty. The migration from 4 to 5 involves adding a single attribute. I am struggling to debug the problem and have checked all the following; The source database is in fact at version 4 and the persistentStoreCoordinator's managed object model is at version 5. The 4-5 mapping model as well as managed object models for versions 4 and 5 are present in the resources folder of my built application. I've tried various model upgrade paths. Strangely I find that upgrading from an early version 3 - 5 works .. but upgrading from 4 - 5 fails. I've tried adding a custom entity migration policy for migration of the entity whose attributes are changing ... in this case I overrode the method beginEntityMapping:manager:error: . Interestingly this method does get called when migration works (ie when I migrate from 3 to 4, or from 3 to 5 ), but it does not get called in the case that fails ( 4 to 5 ). I'm pretty much at a loss as to where to proceed. Any ideas to help debug this problem would be much appreciated.

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• RDS installation failure on 2012 R2 Server Core VM in Hyper-V Server

  - by Giles

  I'm currently installing a test-bed for my firms Infrastructure replacement. 10 or so Windows/Linux servers will be replaced by 2 physical servers running Hyper-V server. All services (DC, RDS, SQL) will be on Windows 2012 R2 Server Core VMs, Exchange on Server 2012 R2 GUI, and the rest are things like Elastix, MailArchiver etc, which aren't part of the equation thus far. I have installed Hyper-V server on a test box, and sucessfully got two virtual DC's running, SQL 2014 running, and 8.1 which I use for the RSAT tools. When trying to install RDS (The old fashioned kind, not the newer VDI(?) style), I get a failed installation due to the server not being able to reboot. A couple of articles have said not to do it locally, so I've moved on. Sitting at the Powershell prompt on the Domain Controller or SQL server (Both Server Core), I run the following commands: Import-Module RemoteDesktop New-SessionDeployment -ConnectionBroker "AlstersTS.Alsters.local" -SessionHost "AlstersTS.Alsters.local" The installation begins, carries on for 2 or 3 minutes, then I receive the following error message: New-SessionDeployment : Validation failed for the "RD Connection Broker" parameter. AlstersTS.Alsters.local Unable to connect to the server by using WindowsPowerShell remoting. Verify that you can connect to the server. At line:1 char:1 + NewSessionDeployment -ConnectionBroker "AlstersTS.Alsters.local" -SessionHost " ... + + CategoryInfo : NotSpecified: (:) [Write-Error], WriteErrorException + FullyQualifiedErrorID : Microsoft.PowerShell.Commands.WriteErrorException,New-SessionDeployment So far, I have: Triple, triple checked syntax. Tried various other commands, and a script to accomplish the same task. Checked DNS is functioning as it should. Checked to the best of my knowledge that AD is working as it should. Checked that the Network Service has the needed permissions. Created another VM and placed the two roles on different servers. Deleted all VMs, started again with a new domain name (Lather, rinse, repeat) Performed the whole installation on a second physical box running Hyper-V Server Pleaded with it Interestingly, if I perform the installation via a GUI installation, the thing just works! Now I know I could convert this to a Server Core role after installation, but this wouldn't teach me what was wrong in the first instance. I've probably got 10 pages through various Google searches, each page getting a little less relevant. The closest matches seem to have good information, but it doesn't seem to be the fix for my set-up. As a side note, I expected to be able to "tee" or "out-file" the error message into a text file, but couldn't get that to work either, so I've typed in the error message manually. Chaps, any suggestions, from the glaringly obvious, to the long-winded and complex? Thanks!

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• Windows Web Server 2008 R2 Server Core local password complexity

  - by Dennis Allen

  How can I disable the local user account password complexity settings on Windows 2008 R2 "Server Core"? I am trying to migrate our windows 2003 web server to windows 2008 R2. I am trying to see if I can use the "Server Core" install, and it has been a very internet search intensive experience. What I can't find out how to do is to find out how to disable password complexity for local user accounts. While our user account generator currently creates nice strong passwords, there was a time when this was not the case and unfortunately forcing the users to change their password is not an option at this time. Any help greatly appreciated. Dennis

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• Windows Server 2008 R2 Server Core with AD Role having GUI Admin Console

  - by Robert Koritnik

  I would like to setup a machine with Windows Server 2008 R2 Server Core and install following server roles: Active Directory Domain Services Active Directory Federation Services Active Directory Lightweight Directory Services (I'm not sure whether I actually need this one - see note below) I'm obviously going to install Enterprise Edition. Question Can I have an AD administration graphical user interface to manage Active Directory on Server Core machine? I would really like to have it, because I'm not so keen to do stuff using power-shell, because I've never managed AD as well, so a GUI would be much more helpful, because I could at least visualize it a bit better and maybe understand AD structures. Note: I'm setting up development environment machine as well and installing Sharepoint Foundation 2010 on in so it would use this AD machine.

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• Will Intel be releasing anymore 6-core processors soon?

  - by jasondavis

  I am about to start buying parts every week for as long as it takes me to build the best PC I can build. I am looking at the Intel i7-920 processor right now because it is about 250$ and it is a quad-core processor based on the x58 chipset I believe. From what I have read so far, intel is coming out with some 6-core processors soon that will also use the x58 chipset and will allow me to use the same motherboard and memory/ram to upgrade to a 6-core. This sounds really good to me right now. I just read that the new 6-core processor. The Core i7-980X (extreme edition) was just released which is the first 6-core processor but it is supposed to be around $1,000 so I will probably just get the i7-920 for now and then upgrade to the 6-core version when the price goes down. The motherboard I am looking at getting the GIGABYTE GA-X58A-UD5 which is around $280 at newegg.com So that is my basic plan SO far. I have not purchased any parts yet. I am just wanting to ask if this sounds like a good idea or if I should wait longer if I am wanting to eventually have a 6-core processor. Does anyone know if Intel is planning on releasing any other 6-core processor in addition to the Core i7-980X in the near future? I just want to make sure I am buying the best setup for my money if I am going all out on it, thanks for any tips/advice.

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• Dual Core or Quad Core CPU for NetBeans/Eclipse development?

  - by cdb

  I am going to buy a new desktop CPU. I am a programmer who mainly uses NetBeans IDE for Java web application development, with GlassFish application server. I went through the discussion regarding Dual Core or Quad Core. My doubt is that software like IDEs (NetBeans, Eclipse, etc., with a server running) may not be written with multiple cores in mind? I am not a game addict... So what is best for me, and which company should I choose, AMD/Intel?

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• JSP / Tomcat / Apache setup overview on Fedora Core

  - by Richard T

  Hi Folks, For someone with so much Java experience, boy do I feel clueless - thanks in advance for your help in my grocking the present (Feb, 2010) JSP environment. Here's what I am hoping to learn: Do I understand correctly that most people use Apache to "front-end" their Tomcat servers, such that Apache "talks" directly to web clients and "proxies" Tomcat servers? Do I understand correctly that Apache isn't capable of serving JSP directly but requires a server (like Tomcat)? Is there an RPM package for Fedora Core so I don't have to build one myself? Or, does Fedora Core's package installer do a good job on this one from source code? (Some do, some don't!) While I'm here asking questions; Does Tomcat come with a working example that one can start hacking on as a way to get started quickly? If not, got a good suggestion? Thanks folks, RT

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• Any way for ubuntu to use more than one core of i7 cpu on my Asus laptop?

  - by G. He

  Newly installed ubuntu 11.10 on a new Asus U46E laptop. /proc/cpuinfo correctly identified the cpu but shows only one core: processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 42 model name : Intel(R) Core(TM) i7-2640M CPU @ 2.80GHz stepping : 7 cpu MHz : 800.000 cache size : 4096 KB physical id : 0 siblings : 1 core id : 0 cpu cores : 1 apicid : 0 initial apicid : 0 fpu : yes fpu_exception : yes cpuid level : 13 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc up arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm sse4_1 sse4_2 x2apic popcnt aes xsave avx lahf_lm ida arat epb xsaveopt pln pts dts tpr_shadow vnmi flexpriority ept vpid bogomips : 5587.63 clflush size : 64 cache_alignment : 64 address sizes : 36 bits physical, 48 bits virtual power management: I search here and found the answer to one post suggesting remove boot parameter 'nolapic'. However, on my particular laptop, ubuntu won't boot without this nolapic parameter. Is there anyway for ubuntu correly utility the full cpu power?

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• What hardware combonation is better one with a i7-720QM processor and GeForce 310M graphics or one w

  - by Mason

  I am looking for a new laptop and the two i am deciding between is an Asus with Intel® Core™ i5-430M processor and NVIDIA GeForce GTS 360M graphics. Or a Toshiba with the Intel® Core™ i7-720QM processor and NVIDIA GeForce 310M graphics. I am looking for a computer to use for college and be able to play games on. I want to know what one I should get they are both the same price.

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• 3d Studio Max and 2+CPUs - Core limit ?

  - by FreekOne

  Hi guys, I am scouting for parts to put in a new machine, and in the process, while looking at different benchmarks I stumbled upon this benchmark and it got me a bit worried. Quote form it: Noticably absent from this review is an old-time favorite, 3ds Max. I did attempt to run our custom 3ds Max benchmark on both the 2009 and 2010 versions of the software, but the application would simply not load on the Westmere box with hyper-threading enabled. Evidently Autodesk didn't plan far enough ahead to write their software for more than 16 threads. Once there is an update that addresses this issue, I will happily add 3ds Max back into the benchmarking mix. Since I was looking at dual hexa-core Xeons (x5650), that would put my future machine at 24 logical cores which (duh) is well over 16 cores and since I'm mostly building this for 3DS Max work, you can see how this would seriously spoil my plans. I tried looking for additional information on this potential issue, but the above article seems to be the only one who mentions it. Could anyone who has access to a 16 core machine or an in-depth knowledge about 3DS Max please confirm this ? Any help would be much appreciated !

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• Boot disc Dual-Core CPU stress tool

  - by Ssvarc

  Looking for a tool that can test a daul-core cpu via a boot disc, thus bypassing Windows (and ensuring that only the hardware is being tested). UBCD4Win's included Prime95 is an older version and it can't run two threads at once. Ditto for UBCD. Any idea? And while I'm asking, is there a boot tool for GPU's? Thanks!

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• Core i7 & x58 overclocking?

  - by user9611

  Is there any problem overclocking the Core i7 chip on an x58 mb with you have all 6 memory slots filled? I just heard somewhere that if you want to overclock you should stick to 3 modules? Is there any truth to this? thanks, Ncage

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• Core i7 c1e and speedstepping - BSOD on shutdown

  - by DeaconDesperado

  I'm having an interesting problem with my recent Core i7 Digital Audio workstation build that I am curious to see if others have encountered. First, here are the specs on the machine. ASUS P6TD Deluxe Intel X58 Socket LGA1366 MB Intel Core i7-950 3.06Ghz 8M LGA1366 CPU CORSAIR DOMINATOR 6GB (3 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 Western Digital Caviar Black WD5001AALS 500GB Plus a couple ASUS optical drives and a 750W Corsair PSU. Running Windows 7 x64. All this is connected to the nefarious Digi 002 firewire audio interface for use with Pro Tools. I following mostly the specs posted by many other I7 users in the digidesign community who pooled their collective knowledge in this thread. Now after completing my build, I fell victim to the "UD5 squeal" described at that forum thread. So taking the advice posted, I disabled c1e advanced halt state and Intel speed stepping (I would likely have done this anyway to maintain a stable clock, power consumption isn't really a relevant concern on this machine.) I enabled XMP to set the ram timings properly as well. What I am experiencing is a BSOD upon shutdown, but only immediately after windows fully exits and ends all processes. The error is a MACHINE_CHECK_EXCEPTION 0x000000. The funny thing is that it is extremely intermitent and only occurs if the shutdown immediately followed a period of relative idleness. It does not a generate a minidump, I suspect because windows monitoring has terminated by the time this error occurs. No damage is evident and one can simply turn off manually and the system will act as though a proper shutdown had occurred. If anything it is a annoyance, I just want to be certain it is not affecting my long term stability. I have read that the i7 950 does not like DRAM voltages past 1.65, but that they are acceptable if they are within .5 of the BLCK setting. I have tried disabling XMP and setting all timings to auto and the problem still manifests in an identical way. It is suspect that the cpu idleness preceding shutdown is the determining factor, as both c1e and speedstepping are both settings intended to modify handling of this state. Any suggestions or prior experiences would be greatly appreciated. EDIT: The behavior very closely resembles what's described in this thread: http://www.tomshardware.com/forum/12003-63-shut-problem-windows The benign nature of it of is identical. I can't seem to download the hotfix cited there however.

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• Multi-core processors: Better performance running multiple applications?

  - by aip.cd.aish

  I realize for single applications - the application itself has to be designed to take advantage of multiple cores. But what about executing many different applications simultaneously? On my development machine at an average instance, I run multiple servers (a database server, a web server), multiple instance of IDEs (either Visual Studio or NetBeans), Web-browser with multiple tabs (in Chrome, each tab is a process on its own), FTP client, SSH client etc. Does having a multi-core system improve the ability to run multiple applications simultaneously?

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• Dual Booting Ubuntu on my Core i7 64 bit with Windows 7

  - by Bragaadeesh

  Hi, I downloaded the ubuntu version 10 from internet and tried to run the wbu.exe inside the image that I burnt into a CD. I am getting the following error during running it My Details OS: Windows 7 Ultimate; Processor : Core Quad i7; RAM : 4GB; Graphics Card : 1GB nVidia Any help is much appreciated. Thanks!

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• Can you install Windows Messaging on Windows Server Core 2008 R2

  - by user179632

  We have Windows Server Core 2008 R2. We have successfully installed .NET and the Visual C++ runtimes. Our application requires the ability to post messages to an MSMQ server To be clear we do not want to install MSMQ server on the machine. However we want to be able to post messages to a remote MSMQ server so we need to install the client parts of Windows Messaging. Has anybody succeeded in doing this?

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• My Intel Core i3 frequently shuts down due to "Processor Thermal Trip error"

  - by explorest

  My Desktop PC running Windows 7 on Intel Core i3 dual processor machine started shutting down during the boot process a couple of days ago. I left it alone for about 48 hours and tried again. The boot process informed me about Processor Thermal Trip as being the cause of boot failures and suggested a Windows recovery process. I went through the recovery process which completed without problems. The PC booted normally and Windows 7 worked as expected but after 10 minutes it again tripped and now whenever I start it, it shuts down during the boot process. What should I do next?... is there a boot menu / setup settings that needs to be adjusted to avoid it... Or is there a hardware problem (which seems unlikely as the machine occasionally boots perfectly )?

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• Why does CentOS Linux use cpu/core #1 so much more in a 4-core system?

  - by ck_

  I've been watching top and htop for awhile on a very active server and I am wondering why linux does not automatically use cpu affinity better? CPU #1 (actually core #1 of 4) is used much more heavily than the others. Is there a setting similar to what vm.swappiness does for vm swap that forces a preferred affinity pattern? Should I be using forced affinity settings within mysql/apache/nginx/exim to get better results? This is on CentOS 2.6.32-279 x86_64 SMP Thanks for any suggestions.

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• Store XML data in Core Data

  - by ct2k7

  Hi, is there any easy way of store XML data into core data? Currently, my app just pulls the values from the XML file directly, however, this isn't efficient for XML files which holds over 100 entries, thus storing the data in Core Data would be the best option. XML file is called/downloaded/parsed ever time the app opens. With the Core Data, the XML data would be downloaded ever 3600 seconds or so, and refresh the current data in the core data, to reduce the loading time when opening the app. Any ideas on how I can do this? Having reviewed the developer documentation, it doesn't look very tasty.

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• Core Data vs. SQLitePersistentObjects

  - by Macatomy

  I'm creating an iPhone app and I'm trying to choose between 2 solutions for a persistent store. Core Data, or SQLitePersistentObjects. Basically, all my app needs is a way to store an array of model objects and then load them again to display in a UITableView. Its nothing too complicated. Core Data seems to have a much higher learning curve than the simple to use SQLitePersistentObjects. Are there any obvious benefits of using Core Data over SQLitePersistentObjects in my case?

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• Can Core Data be used on Linux?

  - by glenc

  This might be a stupid question, but I was wondering whether or not you can use the Core Data libraries on Linux at all? I'm planning how to build the server side of an iPhone app that I'm working on, and have found that you can use PyObjC to get access to Core Data in a Python environment, e.g. use Core Data in a TurboGears web application. At this point I'm thinking that you would have to run the web server on Mac OSX, because I can't find any evidence on the internet that you can access the Objective-C libraries on Linux. I've always written webapps on Linux but will obviously make the jump to an OSX server if it allows me to use the same datastore implementation on the iPhone and the server, the only job remaining being the Core Data <- Web Services XML translation that has to happen on the wire.

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• How can Core Data store an NSData?

  - by mystify

  The documentation says, that core data properties can only store NSString, NSNumber and NSDate types. However, a lot of Core Data users claim Core Data could also store an NSData type. But I wasn't able to see that in the documentation, although the Xcode Data Modeler allows to choose a data type called "binary" (which seems to be NSData). Did I miss something? Is there a hidden place in the documentation that indeed lists NSData for binary stuff?

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• Linux core dumps are too large!

  - by themoondothshine

  Hey guys, Recently I've been noticing an increase in the size of the core dumps generated by my application. Initially, they were just around 5MB in size and contained around 5 stack frames, and now I have core dumps of 2GBs and the information contained within them are no different from the smaller dumps. Is there any way I can control the size of core dumps generated? Shouldn't they be at least smaller than the application binary itself? Binaries are compiled in this way: Compiled in release mode with debug symbols (ie, -g compiler option in GCC). Debug symbols are copied onto a separate file and stripped from the binary. A GNU debug symbols link is added to the binary. At the beginning of the application, there's a call to setrlimit which sets the core limit to infinity -- Is this the problem?

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