Search Results

Search found 6196 results on 248 pages for 'minimum requirements'.

Page 99/248 | < Previous Page | 95 96 97 98 99 100 101 102 103 104 105 106  | Next Page >

• Could a computer act (dependably) as a wireless router for 200+ clients? [closed]

  - by awkwardusername

  That is, I have a Core 2 Duo E7500 at 2.93GHz, with 2GB memory. I plan to install either Windows Server 2012 or Zeroshell 2.0RC1, and it also (planning to) includes two PCIe Wireless Card Adapters. It also has one ethernet port, and I will connect that to another machine which will be a Database and a Web Server. My plan is to have a corporate level wireless intranet with 200+ clients. I cannot afford to buy routers because I want to operate at zero costs as possible, utilizing my available resources. Is that plan plausible? Also, what minimum specs should my wireless card have? @SvenW: Oh, I meant corporate on the deployment level. I am still an undergraduate and this is more of an educational and expiremental work than an actual project. I got Windows Server 2012 for free though, and this isn't actually for commercial use.

  Read the article

• win2008 R2 server core software RAID

  - by shimonyk

  I am trying to set up software raid on a win2008 R2 server core. I have the disks configured as dynamic. In the server manager gui, i can see the disks, but when i right click, the option to set up "new mirrored volume" is not listed. I tried it with the command line using diskpart, and it gives the error "Virtual Disk Service Error: The size of the extent is less than the minimum." The drive are a new pair of 1Tb disks. Is this not supported in server core, or am i missing something else? Thank you

  Read the article

• Various problems with software raid1 array built with Samsung 840 Pro SSDs

  - by Andy B

  I am bringing to ServerFault a problem that is tormenting me for 6+ months. I have a CentOS 6 (64bit) server with an md software raid-1 array with 2 x Samsung 840 Pro SSDs (512GB). Problems: Serious write speed problems: root [~]# time dd if=arch.tar.gz of=test4 bs=2M oflag=sync 146+1 records in 146+1 records out 307191761 bytes (307 MB) copied, 23.6788 s, 13.0 MB/s real 0m23.680s user 0m0.000s sys 0m0.932s When doing the above (or any other larger copy) the load spikes to unbelievable values (even over 100) going up from ~ 1. When doing the above I've also noticed very weird iostat results: Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util sda 0.00 1589.50 0.00 54.00 0.00 13148.00 243.48 0.60 11.17 0.46 2.50 sdb 0.00 1627.50 0.00 16.50 0.00 9524.00 577.21 144.25 1439.33 60.61 100.00 md1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 md2 0.00 0.00 0.00 1602.00 0.00 12816.00 8.00 0.00 0.00 0.00 0.00 md0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 And it keeps it this way until it actually writes the file to the device (out from swap/cache/memory). The problem is that the second SSD in the array has svctm and await roughly 100 times larger than the second. For some reason the wear is different between the 2 members of the array root [~]# smartctl --attributes /dev/sda | grep -i wear 177 Wear_Leveling_Count 0x0013 094% 094 000 Pre-fail Always - 180 root [~]# smartctl --attributes /dev/sdb | grep -i wear 177 Wear_Leveling_Count 0x0013 070% 070 000 Pre-fail Always - 1005 The first SSD has a wear of 6% while the second SSD has a wear of 30%!! It's like the second SSD in the array works at least 5 times as hard as the first one as proven by the first iteration of iostat (the averages since reboot): Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util sda 10.44 51.06 790.39 125.41 8803.98 1633.11 11.40 0.33 0.37 0.06 5.64 sdb 9.53 58.35 322.37 118.11 4835.59 1633.11 14.69 0.33 0.76 0.29 12.97 md1 0.00 0.00 1.88 1.33 15.07 10.68 8.00 0.00 0.00 0.00 0.00 md2 0.00 0.00 1109.02 173.12 10881.59 1620.39 9.75 0.00 0.00 0.00 0.00 md0 0.00 0.00 0.41 0.01 3.10 0.02 7.42 0.00 0.00 0.00 0.00 What I've tried: I've updated the firmware to DXM05B0Q (following reports of dramatic improvements for 840Ps after this update). I have looked for "hard resetting link" in dmesg to check for cable/backplane issues but nothing. I have checked the alignment and I believe they are aligned correctly (1MB boundary, listing below) I have checked /proc/mdstat and the array is Optimal (second listing below). root [~]# fdisk -ul /dev/sda Disk /dev/sda: 512.1 GB, 512110190592 bytes 255 heads, 63 sectors/track, 62260 cylinders, total 1000215216 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00026d59 Device Boot Start End Blocks Id System /dev/sda1 2048 4196351 2097152 fd Linux raid autodetect Partition 1 does not end on cylinder boundary. /dev/sda2 * 4196352 4605951 204800 fd Linux raid autodetect Partition 2 does not end on cylinder boundary. /dev/sda3 4605952 814106623 404750336 fd Linux raid autodetect root [~]# fdisk -ul /dev/sdb Disk /dev/sdb: 512.1 GB, 512110190592 bytes 255 heads, 63 sectors/track, 62260 cylinders, total 1000215216 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x0003dede Device Boot Start End Blocks Id System /dev/sdb1 2048 4196351 2097152 fd Linux raid autodetect Partition 1 does not end on cylinder boundary. /dev/sdb2 * 4196352 4605951 204800 fd Linux raid autodetect Partition 2 does not end on cylinder boundary. /dev/sdb3 4605952 814106623 404750336 fd Linux raid autodetect /proc/mdstat root # cat /proc/mdstat Personalities : [raid1] md0 : active raid1 sdb2[1] sda2[0] 204736 blocks super 1.0 [2/2] [UU] md2 : active raid1 sdb3[1] sda3[0] 404750144 blocks super 1.0 [2/2] [UU] md1 : active raid1 sdb1[1] sda1[0] 2096064 blocks super 1.1 [2/2] [UU] unused devices: Running a read test with hdparm root [~]# hdparm -t /dev/sda /dev/sda: Timing buffered disk reads: 664 MB in 3.00 seconds = 221.33 MB/sec root [~]# hdparm -t /dev/sdb /dev/sdb: Timing buffered disk reads: 288 MB in 3.01 seconds = 95.77 MB/sec But look what happens if I add --direct root [~]# hdparm --direct -t /dev/sda /dev/sda: Timing O_DIRECT disk reads: 788 MB in 3.01 seconds = 262.08 MB/sec root [~]# hdparm --direct -t /dev/sdb /dev/sdb: Timing O_DIRECT disk reads: 534 MB in 3.02 seconds = 176.90 MB/sec Both tests increase but /dev/sdb doubles while /dev/sda increases maybe 20%. I just don't know what to make of this. As suggested by Mr. Wagner I've done another read test with dd this time and it confirms the hdparm test: root [/home2]# dd if=/dev/sda of=/dev/null bs=1G count=10 10+0 records in 10+0 records out 10737418240 bytes (11 GB) copied, 38.0855 s, 282 MB/s root [/home2]# dd if=/dev/sdb of=/dev/null bs=1G count=10 10+0 records in 10+0 records out 10737418240 bytes (11 GB) copied, 115.24 s, 93.2 MB/s So sda is 3 times faster than sdb. Or maybe sdb is doing also something else besides what sda does. Is there some way to find out if sdb is doing more than what sda does? UPDATE Again, as suggested by Mr. Wagner, I have swapped the 2 SSDs. And as he thought it would happen, the problem moved from sdb to sda. So I guess I'll RMA one of the SSDs. I wonder if the cage might be problematic. What is wrong with this array? Please help!

  Read the article

• Excel 2010: Copy row conditionaly

  - by TimothyHeyden

  I've searched for a similar question here, but haven't been able to find something that answers my issue. I'm a mediocre user of Excel 2010 with no experience in macro's. I have a dataset where each row represents a data entry. Let's say each row can be for each of its values (the columns) the maximum or minimum of the entire dataset. How can I create a row at the top where the, for instance, maximum row is shown dynamicly? So when extra data is added to the bottom of the dataset, the new maximum (if applicable) is shown in that row at the top. Thank you in advance!

  Read the article

• How do I remove the Refresh button from the Address toolbar?

  - by Iszi

  I like being able to run commands straight from my Task Bar. So, I've enabled the Address toolbar on my new Windows 7 system - just like I had on my old XP system. However, the bar seems to have a mandatory minimum length (I've posted a separate question about that) that's a bit longer than I'd prefer. Additionally, a bit more horizontal space is consumed by a Refresh button at the end of it. This Refresh button appears similar to the Go button that used to show by default in older versions. That button was easily removed by changing a registry value that doesn't seem to exist in Windows 7. Is there a similar registry hack I can use to remove the new Refresh button?

  Read the article

• Linux QoS: bulk data transmission during idle times

  - by syneticon-dj

  How would I do a QoS setup where a certain low-priority data stream would get up to X Mbps of bandwidth, but only if the current total bandwidth (of all streams/classes) on this interface does not exceed X? At the same time, other data streams / classes must not be limited to X. The use case is an ISP billing the traffic by calculating the bandwidth average over 5 minute intervals and billing the maximum. I would like to keep the maximum usage to a minimum (i.e. quench the bulk transfer during interface busy times) but get the data through during idle/low traffic times. Looking at the frequently used classful schedulers CBQ, HTB and HSFC I cannot see a straightforward way to accomplish this.

  Read the article

• Best way to find the computer a user last logged on from?

  - by Garrett

  I am hoping that somewhere in Active Directory the "last logged on from [computer]" is written/stored, or there is a log I can parse out? The purpose of wanting to know the last PC logged on from is for offering remote support over the network - our users move around pretty infrequently, but I'd like to know that whatever I'm consulting was updating that morning (when they logged in, presumably) at minimum. I'm also considering login scripts that write the user and computer names to a known location I can reference, but some of our users don't like to logout for 15 days at a time. If there is an elegant solution that uses login scripts, definitely mention it - but if it happens to work for merely unlocking the station, that would be even better!

  Read the article

• Installing linux mint in one partition

  - by sha404

  So, I have a disk with a MBR setup(image below). I've managed to have 50 GB unallocated space for intalling Linux Mint 14. And I want to keep the current windows OS too(but don't want the Mint inside windows). Now I've seen in some tutorials that Linux Mint needs several partitions for bootloader, swap, & home. I don't like to have so many partitions & maybe MBR stuff won't let me create more than one now. So, is it possible to install Linux Mint in one partition only? If it is really impossible than what's the minimum number? & how can I accomplish that? Thanks in advance.

  Read the article

• A space-efficient guest filesystem for grow-as-needed virtual disks ?

  - by Steve Schnepp

  A common practice is to use non-preallocated virtual disks. Since they only grow as needed, it makes them perfect for fast backup, overallocation and creation speed. Since file systems are usually based on physical disks they have the tendency to use the whole area available1 in order to increase the speed2 or reliability3. I'm searching a filesystem that does the exact opposite : try to touch the minimum blocks need by an aggressive block reuse. I would happily trade some performance for space usage. There is already a similar question, but it is rather general. I have very specific goal : space-efficiency. 1. Like page caching uses all the free physical memory 2. Canonical example : online defragmentation 3. Canonical example : snapshotting

  Read the article

• Umbraco on Windows 7 64-bit

  - by HeavyWave

  I'm trying to install Umbraco CMS on Windows 7 64-bit and I get the following exception: [HttpException (0x80004005): Could not load file or assembly 'ImageManipulation, Version=1.0.2105.41209, Culture=neutral, PublicKeyToken=null' or one of its dependencies. Failed to grant minimum permission required. The application pool's trust mode is set to 'Full', all the user permissions are just as on other sites hosted on the same machine. I went through all relevant topics on Umbraco's forum, but all advices are about the trust level. How do I fix this?

  Read the article

• Check a list of passwords strength

  - by user144705

  Is there any way to check a list of passwords whether they strong or not? I have a list of passwords, around 2000, and want to check them against this policy Password must contain a minimum of eight (8) characters Password must contain at least one letter Password must contain at least one number Password must contain at least one punctuation character And count how many compliant with that policy before we save them. Is there any tool, script or maybe rules in excel to do this instead of doing it manually? Could you please help me?

  Read the article

• Permissions to run a SharePoint 2010 Application Pool?

  - by Michael Stum

  I'm currently in the process of setting up a SharePoint 2010 farm. In my Dev Environments, I have one account that is Local Admin, Farm Administrator and runs all Application Pools. For Production Environment, I would like to go with best Security Practices and run the Web Applications (At least 2: Main Portal and My Sites) with separate Domain Accounts. It's been some time that I worked with IIS, and I remember that there were issues with accessing files in c:\inetpub by non-Admin users. On the other hand, SharePoint "automagically" sets most permissions anyway. Does anyone have some experience with which permissions I need to give to the domain account at minimum in order to work?

  Read the article

• Chipset GPU causes a massive slowdown

  - by zyboxenterprises

  My AMD Radeon HD 7700 recently broke (fan stopped working and GPU overheated), and now I'm running on internal chipset graphics, and it causes a massive slowdown of the whole PC. I've changed the graphics memory from 32MB (minimum) to 256MB (highest), and it hasn't made any difference whatsoever. I'm using Windows Aero, and disabling it should have made a small difference, but it didn't; the whole PC is still slow. I know that it's not the computer build, because I built it myself, and it was a lot faster when it had the AMD Radeon HD 7700 in it, which is the reason why I believe it's the internal chipset graphics that are causing the problem. Is this behavior normal? I don't have the cash right now to go out and buy a new dedicated GPU. I'm using an ASRock N68C-GS FX motherboard with an AMD FX 4100 (overclocked to 4.3GHZ), with 4GB RAM. The overclock was an attempt to resolve this issue, and it isn't related to this issue that the integrated graphics is causing a slowdown.

  Read the article

• Meaning of tcp_delack_min

  - by Phi

  Hi, the current Linux Kernel (e.g. 2.6.36) uses Delayed Acknowledgments (delack). In /include/net/tcp.h it says: define TCP_DELACK_MIN ((unsigned)(HZ/25)) So, for a Kernel using a HZ value of 1000, an ACK should be delayed by a minimum of 40 ms. However, RFC 2581 says a TCP implementation should acknowledge every second full sized segment without further delay. Does anybody know whether the Linux Kernel follows that 'should' or whether the TCP_DELACK_MIN value means that even after a full sized segment was received, the ACK continues to be delayed until 40 ms have passed?

  Read the article

• High shmmax value in Redhat 6.3

  - by xpapad

  We are using Redhat 6.3 with 30G RAM to host our Postgres server. The (default) shmmax value is 68,719,476,736 In some forums I have read that having an shmmax value larger than the RAM causes extensive paging, but in the Redhat forums it warns against changing a kernel parameter that is already configured to a value larger than the minimum requirements for an environment. In ServerFault I've read that this probably has no impact. So is there any impact of having shmmax value RAM in a DB server, or the kernel understands this and handles it appropriately? Thanks

  Read the article

• How to efficiently dump a huge MySQL innodb database?

  - by Jagbir

  I got an Ubuntu 10.04 production MySQL database server where total size of database is 260 GB while size of root partition is itself 300 GB where DB is stored, essentially means around 96% of / is full and there's no space left for storing dump/backup etc. No other disk is attached to server as of now. My task is to migrate this database to other server sitting in different datacenter. Question is how to do that efficiently with minimum downtime? I'm thinking in line of: Request to attach an extra drive to server and take a dump in that drive. Transfer dump to new server, restore it and make new server slave of existing one to keep data in sync When migration is needed, break replication, update slave config to accept read/write requests and make old server read-only so it won't entertain any write requests and tell app developers to update there config with new IP address for db. What's your suggestions to improve this or any alternate better approach for this task?

  Read the article

• Cisco ASA 5505 inside interface multiple ip addresses

  - by Oneiroi

  I have an issue this morning where I want to be able to assign multiple ip addresses to the inside interface to facilitate an ip range migration for an office. Namely from a 192.168.1.x range to the new range, with the minimum of interruption for those working in the office. (New DHCP leases will use the new range, whilst those still on the 192.168.1.x range can continue to work until their lease is renewed). However I can not for the life of me figure out how to achieve this, trying to create multiple interfaces for the job leads to complaints about the license only allowing 2 active interfaces. Any suggestions? thanks in advance.

  Read the article

• How to change resolution in Ubuntu 10.04, where xvinfo is showing no adapters present?

  - by YumYum

  I am trying to maximize my resolution where I have Resolution: 800x600 (4:3) and Refresh rate: 61Hz I tried the following, but it did not work: $ xvinfo X-Video Extension version 2.2 screen #0 no adaptors present $ cvt 1920 1080 # 1920x1080 59.96 Hz (CVT 2.07M9) hsync: 67.16 kHz; pclk: 173.00 MHz Modeline "1920x1080_60.00" 173.00 1920 2048 2248 2576 1080 1083 1088 1120 -hsync +vsync $ xrandr --newmode clever_name 173.00 1920 2048 2248 2576 1080 1083 1088 1120 $ xrandr -q Screen 0: minimum 640 x 480, current 800 x 600, maximum 800 x 600 default connected 800x600+0+0 0mm x 0mm 800x600 61.0* 640x480 60.0 clever_name (0x11d) 173.0MHz h: width 1920 start 2048 end 2248 total 2576 skew 0 clock 67.2KHz v: height 1080 start 1083 end 1088 total 1120 clock 60.0Hz $ xrandr --addmode default clever_name $ xrandr --output default --mode clever_name xrandr: Configure crtc 0 failed

  Read the article

• 2 DSL lines...any benefit?

  - by EJB

  I have verizon DSL in my office, I put DSL in about a year ago for $29.95 month...I added a new phone line recently and it was cheaper to actually get it bundled with DSL so now I have two DSL lines...my plan was to shut the first one off when my 1 year contract comes up (in September). A couple of times DSL has gone out on one line so I just used the other, which is a nice redundancy to have - but it doesn't happen often. (I unplugged one line and plugged in the other) Question is, is there any way to use both DSL lines together so that 1) I can increase bandwidth and effective speed might increase (is that possible?) or 2) have them both on and connected someway so that traffic on my network would just use either one, and if one went down the traffic would route automatically? If I can either increase speed by having two, or at a minimum get some automatic redundancy, I see no reason to keep both on.... Thanks!

  Read the article

• Minimal Linux distribution with sshd and apt

  - by Sergey Mikhanov

  When I signed up for my Debian Linux VPS hosting and first logged on and invoked ps, there was the only user process running: sshd. As I can see, this was minimal Linux with only two things installed and configured: sshd and apt (plus all dependencies, of course). I want to build (or use existing) similar Linux distro, any advice on how to build (or pick) one? Googling "minimum linux", or "linux with sshd only" usually brings up Debian's netinstall, which is not what I want. Thanks in advance.

  Read the article

• Why does HDTune report better performing drives 2 months after installing them?

  - by Rolnik

  OK, so this is really weird. I ran HDTune on a newly set-up home-built computer and got the following readings from my drives in mid-November. SSD 154 MB/s RAID1 87 RAID0 198 (software installs) RAID0 98 Swap drive Today, in January, I run HDTune (same version) and get these results, in MB/s: SSD 186 RAID1 98 RAID0 241 RAID0 98 (Swap drive) Here are more details that HDTune reports on the SSD drive: HD Tune: OCZ-VERTEX Benchmark Blockquote Transfer Rate Minimum : 135.4 MB/sec Transfer Rate Maximum : 219.4 MB/sec Transfer Rate Average : 185.7 MB/sec Access Time : 0.1 ms Burst Rate : 187.3 MB/sec CPU Usage : -1.0% To get to my question: Why are my hard drives improving in performance? Most of my logical drives are in some form of RAID, except for the SSD. Will this performance ever deteriorate? Note, none of my drives are a hybrid drive that uses some form of SSD to enhance the write/reads on actual platters.

  Read the article

• duplicate video stream using a router (?)

  - by Dani

  I have a viedo stream coming from one site, I want to do the following with the minimum delay possible: I want to duplicate the stream (inside the router - preferred) and send it to a few more locations one of them is local network and the rest - on other networks. I want to be able to do it to several streams simultaneously. Is it possible to do this - using network devices only ? What device is capable to do this ? (I can always record the stream and rebroadcast it - but that's a lot of delay, I'm looking for functionality that similar to port duplicating, but on higher layers). Thanks.

  Read the article

• Which server requirment for a Redmine, Git and website hosting?

  - by Ephismen

  Me and 9 other students are going to start a project that will last a minimum of 2 years, for this purpose we are looking to host all our work on a server. Here are a few tools we would like to work with: Redmine GIT Hosting a website/blog to show our work Hosting an internal and private development website/blog We haven't decided yet which OS we will install, but we were looking toward Ubuntu or Fedora. Having a limited budget, 300$/year, we would like to have some advices on the following dedicated server specifications: Kimsufi 2G: Hardware: Intel Celeron/Atom, 1.20 Ghz, 64 bits, 2Gb DDR2, HDD 1 To, Backup FTP 100Gb Network: Connection 100 Mbps, Illimited trafic Dedibox SC: Hardware: Dell Nano U2250, 1x 1,6GHz, 64 bits, 2Gb DDR2, HDD 160 Gb Network: Connection 1Gbit/sec, Illimited trafic Will these server be sufficient? Should we host the websites on another platform? Would a virtualized server be more appropriate? Thank you for your answers, Ephismen.

  Read the article

• Free / Cached / Available memory on Linux

  - by pkoraca

  I have read that linux uses free memory for caching, to make system faster. However, both Nagios and Paessler PRTG monitoring system show me that my memory usage is critical. I could change Nagios mem_usage script to sum free and cached memory, but would that be correct information? I doubt that they misunderstood Linux memory usage. Lets say I have 8 GB RAM. 5 GB are used, 2 GB is cached, and I have 1 GB of free memory. Real available memory should be free+cached (3 GB)? If some new application would need additional 3 GB RAM, could it take everything from cache and free without using swap, or is there a minimum that should be in cache? Real example: $ cat /proc/meminfo MemTotal: 5984256 kB MemFree: 137052 kB Buffers: 140484 kB Cached: 3439616 kB SwapCached: 244 kB Active: 3148824 kB Inactive: 2341768 kB ... My monitoring tools show that I have 137 MB free RAM, however I have ~3,5 GB in Cache. Thanks!

  Read the article

• FreeBSD 9 (amd64) reboot/shutdown process is very slow

  - by nbari

  I have a Dell Poweredge 2900 III with FreeBSD 9 (amd64), the server uses mfi wich handles a raid10, I had to reboot the server, but notice that either when rebooting or shutting down the server, something is going wrong, besides taking to much time to reboot/shutdown, after rebooting I notice that that some ldap instances within some jails could'nt start and this was because the database was corrupted. This make me think that probably something was wrong with the disks or mfi card, but checking the disk array / logs everything seems to be working fine. My set up is something like this: Host server has the minimum base of FreeBSD 9 amd64, within I create some jails, the ones contain services like mysql, email, and some others ldap. With FreeBSD 7 and 8 I didn't notice this behavior but with FreeBSD 9 something is not working well. I did a clean installation of FreeBSD 9 and root filesystem is using ZFS. Attached is an image hoping some one can give me a hint of what to check or any kind of advice. reboot capture screen image

  Read the article

< Previous Page | 95 96 97 98 99 100 101 102 103 104 105 106  | Next Page >