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  • small light laptop with docking station that has a PCI(e) slot

    - by laramichaels
    Hi everyone, I am looking for a new laptop/netbook and I have two simple requirements: must be small (10-12in screen) and light (<=3-3.5pounds); must work with a dock into which I can put a PCI or PCI Express card. Basically, I have no performance requirements. Discontinued or low-end are fine. All I want is something easy to carry that when at work I can use a PCI/PCI Express card with to do multi-head. Eg, if an Acer Aspire 1410 fitted the second requirement I would by one in a blink. The only solution with which I am acquainted are Thinkpads that can go into the Thinkpad Advanced Dock. Do other laptop (or netbook brands) also offer the possibility of using Although this is not a "requirement" per se, I would rather hear about options that would not involve buying the latest-greatest-+$2k model... : ) Thank you for any advice! ~lara

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  • VMware ESXi 4 On-Disk Data Deduplication - possible and supported?

    - by hurikhan77
    Environment: We are running multiple web, database, and application servers which usually share a pretty common installation (gentoo linux) and similar configuration in VMware ESXi 4. The differences are usually only some installed features or differing component versions. To create a new server, I usually choose the most similar (by features) running server, rsync a copy of it into freshly mounted filesystems, run grub, reconfigure and reboot. Problem: Over time this duplicates many on-disk data blocks which probably sums up to several 10's of gigabytes. I suppose if I could use a base system as template with the actual machines based on top of that, only writing changed blocks to some sort of "diff image", performance should improve (increased cache hit rate) and storage efficiency should increase (deduplicated storage space). This would be similar to what ESXi already supports for RAM deduplication (page sharing). Question: Is there any way to easily do this on ESXi 4? I already share the portage tree via NFS but this would not work for the rootfs.

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  • redundant/multi-site terminal server

    - by Adam
    Hi We have a Hyper-V cluster running 5 virtual terminal servers using HA. We need to be able make this system redundant and so if this site was to fail our users could log into the backup system at another location and access their data via the terminal servers. Any ideas? We were thinking of maybe using a NAS which replicated the data to the other location in real-time(pass-through disks)? and having a similar Hyper-V cluster setup in the backup location. However we would need to create the users in both location and create a virtual mirror without the data ie applications, directories, settings etc. Is this the best way to achieve this? We have read that using Hyper-v pass through disks is a big performance de-grade.

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  • Test site speed

    - by Elad Lachmi
    I am test driving an Akmai CDN architecture and before committing to buy, I would like to gauge the real performance gain from the acceleration feature. What would be the best MO for doing speed tests from different locations around the world? I would like to test the page load speed and not just the server response time. I would like to test speed from as many edge locations as possible. I do not mind a paid service as well, if it is optimal. Thank you!

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  • Sync a specific folder of contacts to iPhone

    - by colemanm
    Is there a simple way to organize contacts in Outlook/Entourage and only have a subset of them synchronize with the iPhone over Exchange ActiveSync? Our CEO has thousands of contacts in his mailbox, but would prefer if only a small portion of them synched to his phone over the air... The iPhone's performance takes a huge hit keeping that massive dataset in order. If he could put some of the records in subfolders or something and only sync the top level, I think that would work for him. Does anyone know if this is possible?

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  • Aironet 1200's Auto-Channel Feature: When should it be used?

    - by Josh Brower
    In our building we have around 25 1200 series Aironets, with a bit of overlap in some areas. Up until this point, we have had them deployed in alternating 1/6/11 channels, but we are wondering if we would get better performance if we used the auto-channel select feature. In looking around, I have seen comments that this feature should not be used as the WAP does a channel scan only on the radio startup, but I have not found this in any Cisco docs. Anybody have anymore information, or real-world experience with this feature? Thanks! -Josh

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  • CentOS Vs Windows Server 2008

    - by Steve
    Hi, Apologies if the question appears ambiguous, I have little experience in this area and was after some informed opinions. I am deploying a test scenario of a server/client network and need to make some choices for Server. The client will be a Windows system as it meets the requirements for the client, the server choice has more room for selection. From my experience with Linux in general and the appealing nature of open source for low cost, security etc and the availability and performance of database and web server programs I have been considering CentOS as a server choice. I have the ability to make most of the choices of what software / server packages I wish to install. This includes Active Directory (something I have no experience with). How well does this operate with Windows clients? Am I being too selective and creating unnecessary complication by setting out not to use a Windows Server OS?

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  • How do I fix "Setup did not find any hard disk drives installed in your computer" error during Win X

    - by CT
    I just bought a nettop. It came with WinXP Home. I first installed Win 7 on it. I wasn't that happy with the performance so I decided to go back to XP. I am using an external dvd drive and a Win XP Pro disc. I boot from the dvd drive and during the install get this error: Setup did not find any hard disk drives installed in your computer. Make sure any hard disk drives are powered on and properly connected to your computer, and that any disk-related hardware configuration is correct. This may involve running a manufacturer-supplied diagnostic or setup program. Setup cannot continue. To quit Setup, press F3. This is the nettop in question: http://www.newegg.com/Product/Product.aspx?Item=N82E16883103228

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  • replacement drive cage for power edge R710

    - by bumble_bee_tuna
    Hi I'm performance tuning a DB server its a Dell R710 there is a very significant I/O bottleneck. Unfortunately the server was purchased with the 6 x 3.5 inch sata configuration which doesn't give me the leeway I need to address the issue. Before going to DAS does anyone know if it is possible to purchase a replacement front drive enclosure ? I know the server is configurable with something like 12 or 16 2.5 inch drives and it appears to be modular ? I tired contacting dell but the offshore parts department reps are not very bright lol. Thanks.

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  • dell vostro 1310 with nVidia 8400M display problem

    - by Arthur
    Hi everyone, i hope someone can help me with this problem. I have a Dell vostro 1310 Laptop with 32 bit vista and a 8400M nVidia chip. Recently i have noticed performance issues when my girlfriend was playing Sims 3, and then one day i turned it on and all i got was a thick white line at the bottom of the screen. i heard the OS start up so automatically i thought it was a damaged screen, but i had doubts so i plugged it into an external display via the vga port. it worked but everything appart worm the OS choice menu looks distorted beyond belief. even the bios screen had multicoloured lines running down the screen. The resolution is non existant, the screen only shows a 256 colour pallette and is heavily distorted. i barely managed to get to the device manager where i found the gfx card with an exclamation mark. does anybody have suggestions? should i buy a new mobo or are repairs possible? thanks in advance

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  • How long do managed gigabit ethernet switches take to boot up?

    - by Warren P
    One critical drawback that I have found in researching managed-switches, and one that I have some past experience with is that anything with "lots" of firmware is going to have lots of issues associated with that firmware. We are in the middle of researching rackmount gigabit switches (48 port). It looks like for 48 ports, our only choice is managed switches (Dell, Cisco/Linksys,HP, etc). What I want to know, that I can not find out much about is the boot-time for various managed switches. If you own one, can you please answer with the model number, and the cold boot time in seconds. I have read online that Linksys (now Cisco) SRW series sometimes take almost 5 minutes before they are fully booted up, and that is an unacceptable cost for us. I particularly want to know about Dell PowerConnect managed switch bootup time (model 3548 and 5448), and would like to confirm the 5-minute boot time on the SRW2048 or similar model, and any HP ProCurve boot up times. The composite of all those figures ought to form an interesting overall performance picture.

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  • Should I split my website into different servers

    - by Nyxynyx
    I have a website where a user uploads photos, the photos gets resized and thumbnailed, and stored on the server. At the same time, there are some INSERTS into a MySQL table regarding the photo uploaded (like description, user id etc). The site currently runs off a managed VPS, and I love the support it provides. However it is expensive to store the many small photos and the resizing and thumbnailing processes do cause spikes on the app performance. (Amazon S3 is pretty expensive, especially considering the costs for uploading many small files) Question: Will it be a good idea to move the image processing operations and image storage to another server which is an unmanaged dedicated server with a much lower cost/gb and keep the current VPS for its 24/7 support and hosting the webapp? Or should I move the entire site to the dedicated server? VPS Specs 16 cores 2.4GHz (E5620) 1GB memory 60GB Storage 3.5TB transfer $43/mth Managed (24/7) Dedicated Specs i3 2130 2 cores 3.4+ GHz 16 GB DDR3 2 x 1TB SATA2 storage 15 TB transfer $79/mth Unmanaged (Weekdays support) Software used Apache PHP MySQL Solr PostgreSQL ImageMagick

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  • why udp client work when wirshark capture?

    - by herzl shemuelian
    I have two machine A,B windows 7 os .I connect them end to end and try run a performance test by using tcpreplay. step 1) I check conectivity between to point by netcat In A i run nc -lvup 5432 when I run on B nc -u 1.2.3.4 5432 I can send data from B to A step 2) when in I run tcpreplay in B tcpreplay -i %0 myudp.pcap in A I don't recevice any data . when I open wireshark in A then my nc can read data why? I check dst mac and dst ip in pcap file they are correct. is importan udp src mac or src ip for udp how that I open udp server ?

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  • external HDD with SATA & USB interface?

    - by Greg
    Anyone know of an external HDD that would have (in addition to USB) a SATA (eSATA) port/cable? i.e. Brand/Model. Preferably one of the name brands so I have a better change of finding it here or locally if possible. Background - In one location I want to use it is I would like to increase the performance by cabling it directly to the PC SATA port, HOWEVER I don't want to have to open up the PC to do this each time. I was thinking of running a SATA cable out through the PC case so I just plug it directly into the external HDD in question. Perhaps it should be also externally powered too so I don't need to run a power cable out from the PC power supply.

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  • IPtables rate-limit, What are the differences between modules? Recent, Limit

    - by TechZilla
    I am doing some rate-limiting with IPtables, and i'm not sure if I should use "Recent" or "Limit" What are the differences between the two? If they both achieve the same result, which one has better performance? I would like to know, regardless if any difference would be perceivable. I am looking to ACCEPT if under limit, and REJECT if over. I'm not interested in thus bandwidth throttling, I don't want a queue. I don't need any syntax examples, both have ample use examples online. I have also used Limit in the past. I appreciate any responses.

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  • Quad Core host with hyper-threading, how many processors to configure in VirtualBox?

    - by Anthony
    I have a quad-core i7 processor with hyperthreading (8 logical cores), when I configured a virtual machine to use 8 processors, VirtualBox gave me a warning saying that I only have four cores (which is true) and that this may cause a performance issue. But hyper-threading is a hardware feature, so the OS sees 8 cores and it sends instructions to all 8. What if setting it to 4 caused the VM to use 2 cores (4 threads) instead of 4 simultaneous threads (on all 4 cores)? Does the warning I got take into account that my machine has hyper-threading?

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  • Thoughts on Apache log file sizes?

    - by Nathan Long
    Do you place any limits on the size of Apache log files - access.log and error.log? Specifically, can you give: Reasons to limit log file sizes Disk space Any other? Reasons NOT to limit log file sizes Research into performance issues or security breaches Any other? Methods of doing so Cron job that periodically deletes the file, or the first N lines? Any other? Anything you might salvage before deleting For example, grep out how many times a file was downloaded before deleting the access logs I'd like get the thoughts of experienced sysadmins before I do anything. (Marking as community wiki since this may be a matter of opinion.)

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  • How do UEFI and virtual machines relate to each other?

    - by Iterator
    I am trying to get my head around UEFI (Unified Extensible Firmware Interface) and it's not entirely clear to me how this affects virtual machines. Thus, there are three parts to this question: Is UEFI an advance in hardware support for virtualization? All other things being equal, would a machine with UEFI be more likely to run a virtual machine more efficiently than one without, or does UEFI cause any performance hits that negate any speed improvements from a virtual machine? Would the difference in execution be visible to code running in a virtual machine? (In theory, it shouldn't, but in practice?)

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  • How to force my laptop to use the discrete GPU?

    - by Anton Roth
    My laptop (Asus X7BSV) is stuck using only the integrated GPU. It has a nVidia GT540M as well, but I cannot get it to work. I am using a Windows 7 x64 with latest drivers. This occurred after I attached an external USB monitor I need for work, and since then I cannot swap back to the nVidia GPU (dxdiag for example says that the primary GPU is the Intel integrated one). Asus support asked me to completely reinstall the system, but that is something I do not want to do. I checked the BIOS, there is no option as to what GPU to use. The nVidia card itself is working, since I can use CUDA on it, and it worked with a Ubuntu Live CD. In the nVidia software management I tried setting it to global setting, high performance GPU (nVidia), but that had no impact. What am I missing here? I did uninstall/delete all drivers and software related to the external monitor, but that did not help.

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  • How to scale out OpenStreetMap data efficiently

    - by Pierre
    For over a year now, I'm running an in-house PostGIS server filled with OSM data, used for both Mapnik-based tile generation and Nominatim-based geocoding, updated with day replicates. This works pretty well. However, as usage is growing exponentially, I would like to achieve better reliability and performance by adding additional PostgreSQL servers. And I'm kind of lost. Since PostgreSQL doesn't seem to handle replication by itself, I would think about using a piede of middleware like PgPool-II to keep the servers in sync. But I'm afraid it would be nothing but necessary for this usage : very high read-to-write ratio, where all writes are done at the same exact time every day. My questions are simple : What would you do to keep these servers in sync? And, what is done for this at the OpenStreetMap Foundation, MapQuest, Mapbox or CloudMade? Thanks.

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  • perfmon reporting higher IOPs than possible?

    - by BlueToast
    We created a monitoring report for IOPs on performance counters using Disk reads/sec and Disk writes/sec on four servers (physical boxes, no virtualization) that have 4x 15k 146GB SAS drives in RAID10 per server, set to check and record data every 1 second, and logged for 24 hours before stopping reports. These are the results we got: Server1 Maximum disk reads/sec: 4249.437 Maximum disk writes/sec: 4178.946 Server2 Maximum disk reads/sec: 2550.140 Maximum disk writes/sec: 5177.821 Server3 Maximum disk reads/sec: 1903.300 Maximum disk writes/sec: 5299.036 Server4 Maximum disk reads/sec: 8453.572 Maximum disk writes/sec: 11584.653 The average disk reads and writes per second were generally low. I.e. for one particular server it was like average 33 writes/sec, but when monitoring in real-time it would often spike up to several hundreds and also sometimes into the thousands. Could someone explain to me why these numbers are significantly higher than theoretical calculations assuming each drive can do 180 IOPs? Additional details (RAID card): HP Smart Array P410i, Total cache size of 1GB, Write cache is disabled, Array accelerator cache ratio is 25% read and 75% write

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  • Which VNC for Mac to WinXP Home control?

    - by IVR Avenger
    Hi, all. I've got a MacBook and a Windows XP Home machine. I'd like to be able to connect into the XP machine from the Mac over VNC, but not through the Web method, where performance seems to be a bit iffy. I've done some research, and it seems everyone is interested in the XP-Mac connection, where I'm looking to go in the other direction. Is there a free VNC Server out there that will let me accomplish this? Thanks! IVR Avenger

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  • Need advice on PC components for high-end games but in limited budget

    - by Md Atif
    I need advise, I want to buy PC components which will be good for gaming as well as be under my budget. First thing I chose is Graphics card : ATI HD 7850 2GB DDR5 then matching things up with this selected following: Processor: AMD 3.5 GHz AM3 FX 8320 8 Core Piledriver Mobo: MSI 990FXA-GD65 RAM : 8GB DDR3 (4x2) Is this setup looks compatible? If making any of above component inferior will have negligible affect on performance/gaming(like buying 970 chip mobo instead of 990) then please let me know so I can save some money :) ? Any other advice?

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  • Dell EqualLogic vs. EMC VNXe [closed]

    - by Untalented
    We've been looking into SMB SANs and based on the competitive pricing I've been getting we're really liking these two array's. There are some pro's to both solutions, but I've unable to really decide which to choose. The EMC offers better expandability since you can buy an additional shelf (roughly $1200) and can add drives then to the array. However, the Dell unit is still very nice. Can anyone comment on their experiences with the two and thoughts on this? Also, to get the VMware Storage API support you need VMware Enterprise. How much additional performance does this provide? It's roughly $15k more than the Essentials Plus bundle we're looking at (this is a small environment [3 Hosts 1 Array].

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  • Will I experience problems running a Corsair Force GT SSD in IDE mode?

    - by Ian
    I'm planning to buy the Corsair Force GT 120GB (CSSD-F120GBGT-BK) and I'm planning to use it with an older motherboard that doesn't support AHCI (ASUS P5K SE). Will I experience any problems when running this SSD in IDE mode? A slight performance drop is acceptable. EDIT See my answer below. Conclusion: It works great. Follow the discussion here: http://forum.corsair.com/v3/showthread.php?p=570829#post570829 So far so good. Running Corsair Force GT 120GB (using FW1.3.3) on IDE. No BSOD/Freeze whatsoever. Here are my atto benchmark results:

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