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• Kerio group calendaring private/public functionality

  - by bsigrist

  We are considering a change of email servers and Kerio Connect is attractive. However, I am concerned about calendaring functionality. I found an old forum post that states the question well: "We want to create a single public calendar that everyone can see - using Windows XP/Outlook 2003/KOC 6.4.1. We want a way for people to put an entry in their own personal calendar and some how mark it so the entry auto add's or syncs with the public one. If an entry is private it wouldn't sync to the shared public calendar... Has anyone ever heard of a way to do this - in any way with any software?" This is a high priority feature, so if Kerio cannot do this, we may consider Exchange. Does Exchange provide functionality like that described?

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• How to Shrink large Hyper-V VM

  - by autrevo

  Using Disk2VHD utility I converted my bare-metal OS into Hyper-V VHD - http://technet.microsoft.com/en-us/sysinternals/ee656415.aspx And I could obtain a huge 190GB VHD file. Apart from performance issues, this VHD worked fine as guest when hosted on Windows Server 200 R2, Hyper-V. Having realized need to keeping only system files and application installations on VHD. I have deleted most of the junk data from this VHD and now it contains only 20-25 GB. But I am not able to shrink the VHD VM. Having done some research, I came to know, this as a limitation of .VHD files. Subsequently I followed these two step using Edit Virtual Hard Wizard on Windows 2012 Box. Convert from VHD to VHDX (took close to 3 hrs.) Compact (Another 4 hrs.) This did not ever shrink the VHDX either. Does Hyper-V does not provide proper support to handle large VHDs or VHDXs whose size are the range of 200GB.

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• Mac Book Pro SSD

  - by LiamB

  I have a Mac Book Pro (I7 and 8 Gig Ram). I'm a developer - do a fair amount of .net via VMware but lots of Ruby and NodeJs on the Mac. I'm looking to extract some more performance and i think a SSD might be a good option. So I have 2 questions, Can I straight up replace the drive thats in there with a SSD or will this cause me problems? I have files on there as well as apps. What are my options in terms of available hardware.

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• Unable to create context rendering error when run OpenGL application

  - by Rodnower

  Hello, I try to run Mesa gears example and I get following error: freeglut (./gears): Unable to create direct context rendering for window 'Gears' This may hurt performance. though the application runs successfully, but I guess that in future I will have much problems with productivity. I run Linux CentOS 5 on WMvare 7. Mesa's version is 6.5 Relevant output of lspci -v gives: 00:0f.0 VGA compatible controller: VMware SVGA II Adapter (prog-if 00 [VGA controller]) Subsystem: VMware SVGA II Adapter Flags: bus master, medium devsel, latency 64, IRQ 9 I/O ports at 10d0 [size=16] Memory at d0000000 (32-bit, non-prefetchable) [size=128M] Memory at d8000000 (32-bit, non-prefetchable) [size=8M] [virtual] Expansion ROM at 30000000 [disabled] [size=32K] Capabilities: [40] Vendor Specific Information Any one have idea? There is driver of vmvare for CentOS? Thank you for ahead.

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• How to benchmark apache/nginx setup

  - by Saif Bechan

  I am planning to setup nginx as reverse proxy. I will have apache to deliver my dynamic content, and nginx will deliver the static content. My configuration i have now is just Apache with fastCGI. This gives me no configuration problems and runs great. After I have set up nginx I want to run some benchmarks to see if I really got some performance increases, else i will switch back. Does anyone know how I can benchmark this type of setup? Or maybe someone did this already and have some canned results, I will be glad to hear them.

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• Can admins monitor my activity locally even when I use a VPN?

  - by Arjun Create

  My school has one of those super overreacting web blockers (specifically Fortisnet) that blocks things that should be accessible by a high-school senior trying to research projects. Despite many students' complaints the administration's hands are tied due to parents' complaints. I have setup a VPN account from http://www.vpnreactor.com. With this I am able to bypass the blocker. I know this service hides my IP from websites and servers on the web. I also know that the school pays an IT guy just to monitor sites and network traffic that the students are using. Basically, will he be able to see my network traffic? More importantly, will he be able to trace it to my computer or its MAC address? I am connecting over Wi-Fi, not ethernet.

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• Trying to determine the correct number of XFS allocation groups for postgresql server on Linux

  - by HBlend

  I am running a postgres 8.4.5 server on the linux 2.6.33.7 kernel on an 8 disk raid array with an LSI controller. Most of the tables are around 1GB or less. I know that XFS uses allocation groups (AG) to achieve I/O parallelism. My first question is, does this mean that if two tables are in the same AG, all I/O requests are queued to both of them if either is being read from/written to? If so, I assume I would want to spread my tables across as my allocation groups as possible, correct? Wouldn't this ensure that multiple users querying different tables would get the best performance?

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• Can SATA be used to connect computers?

  - by André

  Can SATA be used to connect two computers together, just like a crossover Ethernet cable would do ? I know SATA has no "networking" features and even though a controller may have multiple ports, the drives don't "see" each other, and that in SATA one device acts as the host (the computer) and the other device is some kind of "client" (the storage drive). But still, did anyone attempt to make a kernel module that would make one computer appear as a "client" (so that the host's SATA controller detects it as a standard hard drive) and then set up like a pseudo-Ethernet link or a very high speed serial link (and then run pppd on it and do networking) ? Note : I know this is an unprofessional and totally stupid idea, I'm just asking out of curiosity.

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• NTFS write speed really slow (<15MB/s) on Ubuntu

  - by Zulakis

  When copying large files or testing writespeed with dd, the max writespeed I can get is about 12-15MB/s on drives using the NTFS filesystem. I tested multiple drives (all connected using SATA) which all got writespeeds of 100MB/s+ on Windows or when formatted with ext4, so it's not an alignment or drive issue. top shows high cpu usage for the mount.ntfs process. AMD dual core processor (2.2 GHz) Kernel version: 3.5.0-23-generic Ubuntu 12.04 ntfs-3g version: both 2012.1.15AR.1 (Ubuntu default version) and 2013.1.13AR.2 How can I fix the writespeed?

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• Exchange 2013 Virtual Machine: Backup just mailboxes and clear logs

  - by Ben Curtis

  I have a Windows Server 2012 machine running Exchange 2013 running as a KVM virtual machine. For my VM guests, I do full image based backups from the host, so that I can quickly restore to any host server simply by copying over the disk image files. This means I don't need a nightly full system backup. That being said, without running a VSS Full Backup, the Exchange logs get massive (Specifically, the performance logs which are 500MB a day). In addition, I would also like to have a nightly backup of just the mail database. What is the best way to accomplish this? A full backup of the C:\Program Files\Microsoft\Exchange Server\V15 folder as I found in one tutorial did not clear out the logs. Thanks, Ben

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• How to set expiration date for external files? [closed]

  - by garconcn

  I have a site included lots of external files, most of them are gif format. I have no control on the external files, but have to use them(with permission). When I check the site using Google Pagespeed, I got very low score(31) even though the page load is fast. One of the high priority suggestion is to leverage browser caching by setting an expiration date. However, all the files are on external links. I have already set the expiration date for local files.

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• windows server 2008 vs ubuntu 11 [closed]

  - by user472875

  I am working on implementing a custom server application that should be capable of handling a very large volume of traffic. I am aware that this type of question has been asked a lot, but I haven't been able to find a good answer. What I'm really looking for is for a server with given specs which OS will be able to handle a larger traffic faster and more reliably. I do not care about rights management or any other features. I am fairly good with both platforms, and so I would like to pick the OS with better performance on a clean install, and with nothing else running. Thanks in advance.

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• Drive configuration for 5 large databases

  - by Mr. Flibble

  I've got 5 databases, each 300GB, currently on a RAID 5 array consisting of 5 drives. All the databases are used heavily, at the same time, so drive speed is an issue. Would I see better performance if I got rid of the RAID 5 configuration and just put each database on a separate drive? The redundancy provided by RAID 5 is not necessary due to mirroring elsewhere. Will the server then be able to perform reads / writes to different databases drives in parallel? More so at least than when it's in RAID? This is all on Windows 2003 / SQL 2008.

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• Using a Raspberry Pi as a VPN?

  - by sudo rm -rf

  So I'm sure many of you have heard of the new Raspberry Pi project. I was looking at messing around with Model B, which has the following relevant specs: Broadcom BCM2835 700MHz ARM1176JZFS processor with FPU and Videocore 4 GPU 256MB RAM Boots from SD card, running the Fedora version of Linux (ARM Version) 10/100 BaseT Ethernet socket USB 2.0 socket So I was curious if it would be possible to create a simple VPN out of this little machine. I do realize that since it's an ARM processor that might mess up quite a few things. Any ideas if this is possible? Just for what it's worth, this would be a personal project so I'm not worried about performance.

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• Non-Apple RAID card for Mac PRO (TOWER)

  - by Arthor

  I have the following: MAC PRO (Model Number: A1186) (PCIe - SLOTS) At present I am using the software RAID however I wish to move to the hardware raid because of the following: Performance (4 x 300gb SATA II in RAID 5) Redundancy (Raid 5, 1 drive can fail and system will be online) I do not wish to use the Apple RAID card (very expensive), I would like to use an aftermarket one which is cheaper. Questions: Does anyone have a WORKING aftermarket RAID card working in their MAC PRO (TOWER)? -(Have done some research, ROCKETRAID, need confirmation) If so to the above, does it work from boot? Thanks

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• Apache - Difference between ScriptAlias and WSGIScriptAlias

  - by Jiri Kadlec

  I'm using apache on RHEL Linux server In my /etc/httpd/conf.d/httpd.conf there are two directives: WSGIScriptAlias /apps /var/www/apps <Directory /var/www/apps > Options MultiViews ExecCGI MultiviewsMatch Handlers SetHandler wsgi-script Order allow, deny allow from all </Directory> ScriptAlias /scripts /var/www/scripts <Directory /var/www/scripts > Options MultiViews ExecCGI MultiviewsMatch Handlers SetHandler wsgi-script Order allow, deny allow from all </Directory> What is the difference? I understand that WSGIScriptAlias is restricted for running Python scripts and ScriptAlias also allows running perl scripts. Can I always use ScriptAlias instead of WSGIScriptAlias? Are there any performance advantages of using WSGIScriptAlias instead of ScriptAlias?

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• .NET Framework 4.0 installation is very slow

  - by Dimitri C.

  On my Windows Vista, it takes a full 12 minutes to install the .NET Framework 4.0. a) Is this normal? b) If not, can something be done about it? The reason I'm concerned about the speed is because it slows down the testing of our product installer considerably. Testing an installer is time consuming already, but this new .NET Framework installer makes it almost undoable. Detail: I did the test on a clean Vista inside a VirtualBox virtual machine. This setup does not show any performance issues in other situations. I tried both dotNetFx40_Full_x86_x64.exe and dotNetFx40_Client_x86_x64.exe. They both take approximately the same time to install.

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• openQRM nagios password reset

  - by Entity_Razer

  Right so, basically the story is that to test a XenServer environment from citrix I deployed a openQRM install from SVN to a ubuntu 10.4 install (on a ESX Environment) All went well installs, I can connect to it, but I can't seem to access the nagios plug in. Every time i wish to go to it i'm asked for a pw, and if I input the pw I wrote down yesterday it just doesn't let me in. I'm trying to reset the password on the nagios plug in now but for the life of me can't find it. Googled high and low for a defenitive working solution but so far no luck. Anyone able to lend a hand ? Cheers ! Ubuntu 10.4 Beta as openQRM openQRM installed from SVN cheers

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• Do parent website application pools serve child application pools as well?

  - by Mike G

  I am running a .NET web application in its own application pool on IIS7. The parent website is set to run in its own application pool. Today we noticed a huge number of connections going to IIS. I tried to browse a plain ol' .html page in the directory of the web application and it hangs. I then try to browse another plain .html file in the root of the parent website, and it too hangs. In performance monitor, i see there are some 8k connections to the default website and climbing. I cant seem to understand if my application was the problem, or IIS itself. If it was my application, wouldnt the html page in the root of the parent website still be able to be served? edit: Also, if i shut down the app pool to my application, the html page on the root of the parent website is still not able to be displayed.

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• Architecture behind live streaming [on hold]

  - by l19

  I'm a Comp Sci undergraduate student, and I'm currently trying to understand the architecture behind streaming. I hear several terms and I'm not quite sure how they are related (e.g. streaming, broadcasting, ingesting, etc.) Is there a blog post or book that explains: How it all works in a high-level view (the workflow) The architecture (i.e. I capture content using my camera and want to display it real-time to an audience. I imagine that the content will be transferred to a server, but how does that server transmit the information to several users simultaneously?) Thanks!

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• Moving VMWare Fusion image to Boot Camp

  - by Kristopher Johnson

  I have Windows 7 64-bit running in VMWare Fusion on my MacBook, but am disappointed with the performance, and so I want to try Boot Camp. However, I'd like to avoid reinstalling Windows and all my applications; I just want to somehow copy my VMWare Fusion "disk image" to a Boot Camp partition. My initial thoughts are that I should be able to run a Windows backup program in VMWare Fusion to back up the entire virtual disk, then set up Boot Camp and restore from that backup. However, Googling finds a few posts by people who have tried that and have encountered problems. So, is there a "known good" procedure for doing this?

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• Considerations for a business looking to transition from PSTN to IP Telephony

  - by Bryce Thomas

  Full disclosure - This is related to a homework assignment question. I am not asking you to do my work for me, I am merely looking for some pointers and considerations to direct me in my further research. I have an assignment I'm working on where I've been given a scenario where a business wants to look into transitioning to using "Internet Telephone" as opposed to a traditional PSTN/PBX system and I need to write a report on it. I'm after some high level pointers from people, especially anyone that has been involved in a real life transition of this nature, on what some of the most important considerations are. These can be financial considerations, initial setup considerations, ongoing administrative considerations, quality of service considerations or anything else that is pertinent to performing such a transition.

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• How can I make WinXP bind to ports other than 1025-5000 for outgoing TCP connections?

  - by Chris Dolan

  (I originally posted a similar question on StackOverflow but readers recommended I post here instead) When you create outgoing TCP connections, most applications let the operating system choose which port to use. Most OSes use the IANA recommended dynamic port range of 49152-65535 for this purpose. But in Windows 2003 and earlier (including XP) Microsoft uses ports 1025-5000. Microsoft lets you change the high end of this range via the MaxUserPort TcpIP registry setting, but I see no way to change the low end. I need to have port 4160 free for incoming connections and on rare occasions an outgoing connection steals that port from me before I bind that port.

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• What does the "Maximum Frequency" number mean in the Windows Resource Monitor?

  - by nhinkle

  In the Windows Resource Monitor's CPU tab, there is a status box and graph for the "Maximum Frequency", right next to the "CPU Usage" values. What does this mean? The value is sometimes over 100% on my system... what could that imply? By looking at CPU-z's real-time report of the processor's clock speed, it seems to be loosely related to what frequency the CPU is running at, which would imply that it means "percent of maximum possible frequency the CPU is running at"; this would be of relevance on systems with SpeedStep and/or TurboBoost technology (or similar). Furthermore, setting the system to "power saving mode" lowers the "maximum frequency" value to around 60%, while setting it to "high performance" mode sets it to around 110%. However, the percentage does not seem to exactly correlate to the CPU speed being shown. What value is this actually representing then?

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• MySQL slave server not removing old relay binlogs

  - by MKzero

  I have a MySQL server with slave replication on another host. Today I stumbled across the high disk usage of the slave host and invastigated what takes up all the space. As it turns out this space is occupied by the slaves relay logs. I tried to turn the expire_logs_days variable down and restarted the MySQL daemon but the reported disk space stays the same. I could't really find anything exept that FLUSH LOGS should clear old logs. I tried that with no result. Is there any way I can reduce the disk space that the relay logs take?

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