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• RAID0 array of USB 2 disks, both connected to a single hub. Any benefit?

  - by Josh

  I have two unused USB 2 drives. I wanted to stripe them in a RAID0 configuration for fast disk access for virtual machines. (I find running a VMware virtual machine off a USB2 drive to be painfully slow. Especially Windows Vista) If I have both USB drives attached to the same USB2 hub, will that negate any benefit I gain by creating a RAID0 array? That is to say, is the speed of USB2 the limiting factor or is the speed of the drives? Would I get better performance by attaching one or both drives directly to my computer?

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• What software can I use to pinpoint why Windows Server 2003 takes 15 seconds for any operation?

  - by Dr. Zim

  Ram is about 1/2 in use, four CPUs are all but idle. I tried "Microsoft Server Performance Advisor" with no luck. No entries in the Event Log for hardware failures, etc. And yet I can click on the start menu and wait 15 seconds for any new attempt. Launching software takes 30 seconds to respond. The server has an 8 drive WD RE 250 gig each Dell Perc 6 Sata raid array with Intel gigabit network cards. Anyone have any software titles that could analyze what is going wrong with this server?

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• Remote Desktop not following display settings

  - by John

  I have my RDP client set up to use highest settings for connecting to another PC on my LAN, which has display settings 1280x1024x32bit. RDP is specifically set to use 32bit depth, but when I connect it drops to 16bit. The PC I connect to is (amongst other things) used to do some 3D graphics. I don't expect great performance, just to check it works... but it doesn't over RDP, the 3D app doesn't think the hardware is the same. Does RDP's integration with Windows mean it is providing some virtualised rendering system? Should I use something less 'clever' like VNC, to literally screen-grab the contents of the screen without altering the settings?

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• Aptana Ext code completion in .php files

  - by Frederik Wordenskjold

  I'm having problems getting the code-completion for the Ext 3.2 plugin to work, when working with .php files. I've also installed the php plugin for Aptana, and the same thing applies for php - I cannot access php code-completion when working with a html-file, so it seems like a general issue... It's also not possible to write Ext in .js files, which is weird... The latter case does make sense of course. But I should be able to write both php and Ext in .php files! Is this possible in any way? I have of course tested the code-completion for php in a .php file, which works. The same applies for Ext code in .html documents!

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• Experiences using VLC for video-on-demand streaming? (VLM)

  - by StackedCrooked

  I'm considering my options for implementing a VOD service. Until recently my choices seemed to be either Wowza or Darwin, but now I discovered VLM, which looks really cool. I am going to stream MPEG4 H.264 video with AAC audio. I'm probably going to use the RTSP protocol, but I'm willing to use HTTP as well (after reading this article). Can anyone comment on his or her experiences with VLM? How does it compare to Darwin or Wowza? Is it stable and worthy of production use? Are there any limitations or performance problems?

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• Links won't open in Outlook

  - by Scott Mitchell

  About a week ago Chrome (my default browser) stopped working and I ended up reinstalling. After that, however, links in Outlook 2007, when clicked, no longer open. Instead, I get a warning that reads: General failure. The URL was: URL. Application not found. I presume that there is some MIME or file type association that needs to be configured at the OS level, but I've not had any luck so far. My operating system is Windows 7. Any ideas? EDIT #1 Wayne Johnston suggested I set Chrome as my default browser, but when I go to the Set Default Programs screen in Windows 7 (via Control Panel) I do not see Chrome in the list of programs. How do I get it to show up there?

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• TCP Tweaking options and Results: Any suggestions?

  - by krishnakumar

  I first tried with the default windows XP TCP option(It doesn't have TCPWindowSize option and TCP1323 in its Registry setting). I dynamically set those options using TCP optimizer. Here I list out the result with and without TCP Tweaking option. I see no major improvements in TCP after increasing window size optimally too. What value should I set to increase the performance? Results: Without any window size and MTU setting from server to client (receiving) TCPWindowSize : MTU : TTL: Size:586 MB total duration : 03:47 With window size extension from server to client (receiving) Bandwidth :100 Mbps Latency: 100ms BDP :1250000 TCPWindowSize : 1250000 MTU :1500 TTL:128 Size:586MB total duration : 03:44 With window size extension from server to client (receiving) TCPWindowSize :64240 MTU :1500 TTL :112 Size: 586MB total duration : 03:49

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• Where Catalyst stores applist for switchable graphics?

  - by noober

  I cannot add an app to the list to manually set it to high performance (Radeon instead of Intel HD). When I browse for an exe, nothing happens, the list is still empty. So, maybe I can edit some .cfg or .ini? UPDATE This is NOT my screenshot... actually I've found it on the Net. The list with iexplore.exe is what I meant. When I click 'Browse' and choose any exe (Portal2.exe, for instance) nothing happens. The list is empty, so I cannot set mode for Portal2.exe.

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• What's the best solution for file sharing in my case? DAS or NAS?

  - by jakub

  I want to have in my network small, cheap and energy efficient server with will be fully customizable (Gnu/Linux, OpenBSD). What is more I want to have big, redundant storage in my network and access to it via server. I have already small terminal without hard drive (no SATA/PATA, one drive on USB) which works fine. I don't want to buy big server, or to use regular computer for that. It's not cheap. I thought about a small case (ITX?), and cheap computer in this with SATA ports, but I cannot find anything interesting :( I thought about NAS in network and server independently and booting server from NAS, I'm not sure which technologies will be good for that, and I don't know what with performance. Direct connection to NAS through network from workstation is next pro for that. What do you think about DAS? It will be good for that?

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• How to make IIS7 stop adding etag to response headers?

  - by user20028

  For performance reasons, I'm using expire headers for static files (adding long expiration periods like 50 years or so). Now I'm trying to get rid of etag headers which are automatically added by IIS7. I've done some searching but it seems harder than what I thought (there doesn't seem to be a straight forward way). I found some workarounds but they all use httpmodules (which I'm keeping as a last resort). I strongly prefer to not get the etag header added in the first place. Did anyone manage to do this? Thanks

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• Set 802.1Q tagged port on VLAN1 on Dell PowerConnect switch

  - by Javier

  I'm having big troubles when adding this Dell switch to my network. Here we use several VLANs to segment traffic. All switches (3com and DLink mostly) have configured the same VLANs, most ports are 'untagged' and belong to a single VLAN, except for the ports used to join together the switches (in a star topology), these ports belong to all VLANs and use 802.1Q tags. So far, it works really well. But on this new switch (a Dell PowerConnect 5448), the settings are very different (and confusing). I have configured the same VLANs, an the uplink ports are set in 'general' mode (supposed to be fully 802.1Q compliant), I can set the VLAN membership as 'T' on these ports for all VLANs except VLAN 1. It always stay as 'U' on VLAN 1. Any ideas?

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• MacBook Pro - 72k vs 54k rpm drives - Heat and Noise

  - by webworm

  I am looking at a new 15" MacBook Pro for development purposes. I am planning to run a Virtual Machine for about 50% of my work (Windows 7 x64, IIS, SQL Server, and VS 2010). The upgrade from a 54000 rpm drive to a 72000 rpm is only $45. From what I understand the faster rotational speed of the 72000 rpm drive will help virtual machine performance. However, I am concerned that additional heat and fan noise might be an issue. I will be running mostly on A/C power so decreased battery life is not a major concern for me. Since I would be running with a Core i7 processor which gives off a fair amount of heat already I was wondering if it might be best to stay at 54000 rpm for the hard drive. What do you all think? Thanks!

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• Kernel config file generator

  - by lisak

  Hey guys, could please anybody recommend some kind of kconfig generator that would trim modules and built-in stuff that is not needed according to current hardware ? The best I have found is this : http://lkml.org/lkml/2008/9/16/290 I don't care about compilation time and the amount of modules that are not built-in. I'm concerned about performance. I don't know how much memory and runtime is wasted on huge kernels with almost everything possible. I'm a java developer and I don't know what most of the modules and drivers are for. So there is not much I can disable and be sure that I don't screw it up. Thanks in advance

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• SQL Server 2008 Optimization

  - by hgulyan

  I've learned today, if you append to your query OPTION (MAXDOP 0) your query will run on multiple processors and if it's huge query, query will perform faster. I know general guidelines on query optimizations (using indexes, selecting only needed fields etc.), my question is about SQL Server optimization. Maybe changing some options in configurations or anything else. What guidelines are there for SQL Server Optimization? Thank you. P.S. I suppose, this is not the right place to ask server related questions. Should I delete it or maybe it can be migrated to serverfault?

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• Guaranteeing ACID properties for InnoDB databases.

  - by plinehan

  What steps must one take to ensure that an otherwise defaultly-configured InnoDB server is truly ACID compliant? The InnoDB configuration page mentions that the hardware itself must be configured to honor fsync calls, i.e. disable any write-back caches. This page mentions some other concerns, but may be conflating the binary log and the InnoDB log, and may be a bit out of date regarding default settings for MySQL 5.x. Upon reading the binary log document page it would seem that the "sync_binlog=1" setting is not required for ACID properties in general, only for ACID properties vis a vis point-in-time recovery and replication. So, is disabling write-back disk caching sufficient, or are there other settings that must be tweaked?

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• Latency in TCP/IP-over-Ethernet networks

  - by aix

  What resources (books, Web pages etc) would you recommend that: explain the causes of latency in TCP/IP-over-Ethernet networks; mention tools for looking out for things that cause latency (e.g. certain entries in netstat -s); suggest ways to tweak the Linux TCP stack to reduce TCP latency (Nagle, socket buffers etc). The closest I am aware of is this document, but it's rather brief. Alternatively, you're welcome to answer the above questions directly. edit To be clear, the question isn't just about "abnormal" latency, but about latency in general. Additionally, it is specifically about TCP/IP-over-Ethernet and not about other protocols (even if they have better latency characteristics.)

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• Streaming Flash Video - getting my feet wet

  - by Travis

  I'm working on a project that will involve having a couple thousand short videos online. I haven't done anything with online video before and this is all a bit new to me, so I am looking for some general advice... I would like to use Flowplayer, and I would like to encode the videos as H264s. I am enamoured with Flowplayer's slow motion feature, which if I understand correctly, is only available using a Wowza server. I'm wondering: Is it advisable to use a delivery network of some sort? (Flowplayer seems to have a partnership with HDDN, and recommends them. http://www.hddn.com/) Or would I be better off purchasing Wowza and installing it on our own server? (At first glance, it looks as though signing up with a network like HDDN is much simpler, but perhaps there are problems that come along with this...?) Any tips / warnings of imminent peril would be much appreciated. Thanks in advance.

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• Increase data transfer speed through bonding/lacp?

  - by Matteo

  I want to maximize the throughput of a data transfer between two servers. The copy will be made at the application layer using Robocopy. To clear things up, please check my Visio schema of the network: FS1---------(SW1)===========(SW2)--------- FS2 SW1 to SW2 is connected through 10 gigabit Fiber Channel ethernet FS1 to SW1 is connected through 1 gigabit ethernet FS2 to SW2 is connected through 1 gigabit ethernet I first idea I've come up with is to use LACP, so I could use two Gigabit Ethernet between each server and the switch. A collegue told me that LACP is for availability and not performance, so he reckon this solution will not work. Is he right? Do I have other options? Thank you very much

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• Switching from Windows Virtual PC to VirtualBox without formatting

  - by djechelon

  I have a Win7 virtual machine running on Windows Virtual PC where I'm currently developing. I found that I dislike WVPC, and installed VirtualBox, hoping for better performance. However, importing the existing VHD into a new VM seems to not work, because even if I see the Windows boot screen, the OS will crash on a BSOD and requires the restore tool to run. That tool finds no problem, reboots but the BSOD is still present. I wouldn't like to format a new VM if possible. Is it possible to do such switching?

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• What's the best external hard drive configuration for a software developer laptop?

  - by Dan

  I've got a Dell laptop that I use as a software developer box at work and find that the drive is usually the bottleneck. I'd like to hook up two 10k RPM drives that are striped for performance. I've looked for drive cases with RAID but there don't seem to be very many choices and I'm worried about compatibility with the drives (preferably SATA 2). Also I don't have a SATA connection on my machine so it'll have to USB 2.0 for now. Am I headed down the right path or am I missing a much simpler configuration?

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• SQL Server Files Local or NAS or SAN?

  - by Jedi Master Spooky

  I have to install a new Server with SQL Server 2008, What do you recommend, One server with Raid 10 or the Files in a NAS? What about iSCSI should I use it? What about SAN? The server has 4Gb of RAM and that database file is about 2GB. To make my self clear today the server has no RAID, I have to implement some kind of strategy so if something happend I can have my files safe, so What should I choose Local Files, NAS, SAN? What option has the most performance, what is the more secure?

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• A keyboard shortcut from a sequence of keystrokes for Linux

  - by Little Bobby Tables

  I am looking for a way to define an Emacs-style keys sequence as a keyboard shortcut in Linux - Specifically, in Gnome, but more general solutions are also acceptable. For example, I would like a sequence like "Alt-w t" (that is, first press Alt-w and then t) to open a terminal, "Alt-w c" to close a window, and so on. The rationale behind this question is twofold: Make more use of desktop-wide keyboard shortcuts Make an old keyboard, that has no Win key, usable with desktop-wide keyboard shortcuts, without causing too many collisions with application - Specifically with Emacs. Thanks!

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• How to make BASH try and autocomplete on Enter

  - by swatso33

  I've noticed that for many of the commands I use in bash I have actually learned how many letters of the command I must type before I can press [TAB] to have bash successfully autocomplete the command. For example when opening chromium I dont usually type the whole command but instead type $ chrom[TAB][ENTER] and bash successfully autocompletes the command to chromium before I hit the [ENTER] key. Is there a way to make autocomplete work without having to hit [TAB]? My general thinking is that if I type $ chrom[ENTER] bash could check and see that chrom isnt a valid command, but it would make sense to autocomplete it to chromium since that is the only command that starts with chrom

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• Buying Dual Monitors of different size and resolution

  - by rutherford

  I'm about to go choose a dual monitor setup: 1) Is there any reason why I can't just walk out and buy the two TFT screens I like (a wide screen and a 'portrait' screen) and combine them? Mainly wide screen would be for gaming, and portrait for browsing. I'd want the desktop stretching from one to the other (ie drag pointer, apps from one screen to the other) 2) Also do I need separate gfx cards for each monitor or can one cover both? any performance cost? 3) And can I have separate background images for each, seeing as they'll be different resolutions?

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• How do I convert this filetype to pdf?

  - by Gnoupi

  This question is coming back often, and the general answers are very often the same. In an objective to concentrate useful information in one place, here is a community wiki about it. How can I convert this filetype to pdf? This question will have two kind of answers: The generic case, which works for most filetypes. The specific cases, which should be one answer per filetype. Restricting the OS field to Windows, as most of these questions are about this OS. This may change eventually. As it is community wiki, feel free to edit this question to improve it as well.

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