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  • Php5-fpm Crash if much visitors

    - by chillah
    I decided to change my OP to Nginx from Litespeed because i read much about the low resource that Nginx would cost. Im running a Wordpress site with 500 users online My www.conf in "/etc/php5/fpm/pool.d" pm.max_children = 200 pm.start_servers = 20 pm.min_spare_servers = 20 pm.max_spare_servers = 60 ;pm.process_idle_timeout = 10s; ;pm.max_requests = 1000 Since i changed that config to higher requests and more children the Site needs longer till it shows me a White blank page. If i restart the php5-fpm prozess then, the site is running fine again. The CPU usage is at 5% if the php5-fpm is crashed and if its running its about 20 to 90%! Heres my Nginx.conf: user www-data; worker_processes 2; pid /var/run/nginx.pid; events { worker_connections 3048; # multi_accept on; } http { ## # Basic Settings ## sendfile on; tcp_nopush on; tcp_nodelay on; keepalive_timeout 65; types_hash_max_size 2048; # server_tokens off; I already tried changing the settings, tryed all variants but nothing worked. The Mashine: Dualcore 4gb ram

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  • How do I set up dual monitors on Kubuntu 10.04 using the latest nVidia drivers with a 9800M video ca

    - by NoCatharsis
    I'm a Linux newb so please try to keep the lingo low-key. I installed the latest nVidia drivers on my laptop using the 9800M card. The laptop is a Gateway P-7805u and I'm connected to the second monitor using VGA. Also, before installing the nVidia drivers (and just using the basic drivers included with Kubuntu 10.04), basic dual monitor support worked, except I could not enable compositing features for some reason. So I thought the proprietary drivers would fix this. Several issues have arisen since installation: 1) I've clicked through all of the display settings to activate the second screen with absolutely no change. 2) When I try to apply settings and Save Configuration as the nVidia help suggests, I am told that I cannot save to the X.conf file. I assume this is due to innate permissions on my user settings, which I have no idea how to properly configure. 3) I have no idea where to go from here, as most of the fixes I found online involve Linux syntax and verbiage, to which I'm totally clueless after spending over half my life with Windows.

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  • Creating a Jenkins build farm in a hands-off manner?

    - by user183394
    My colleague and I have set up and run Jenkins on a KVM guest running Ubuntu 12.04 with good results for a while now. We are thinking about deploying a cluster of Jenkins CI hosts in master/slave configuration, with the libvirt slave plugin to keep our hardware count low. Our environment is strictly Linux (CentOS, Scientific Linux, Fedora, and Ubuntu). Both of us are competent in setting up large clusters. We typically use tools like cobbler + a configuration management tool (Puppet, Chef, and alike) to set up a large number of machines (physical and/or virtual) hands off (hundreds of nodes in less than an hour typical). We would like to do the same for nodes running Jenkins. But the step by step guide doesn't give us any clues in this regard. I did see a Multi-slave config plugin. But, being used to dealing with hundreds or more machines completely hands-off, clicking the UI for many machines just doesn't feel right. Can someone point to us a reference that talks about how to set up large cluster of Jenkins CI hosts more in the hands-off way?

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  • Is there any way for ME to improve routing to an overseas server? [migrated]

    - by Simon Hartcher
    I am trying to make a connection to a gaming server in Asia from Australia, but my ISP routes my connection through the US. Tracing route to worldoftanks-sea.com [116.51.25.54]over a maximum of 30 hops: 1 <1 ms <1 ms <1 ms 192.168.1.1 2 34 ms 42 ms 45 ms 10.20.21.123 3 40 ms 40 ms 43 ms 202.7.173.145 4 51 ms 42 ms 36 ms syd-sot-ken-crt1-ge-6-0-0.tpgi.com.au [202.7.171.121] 5 175 ms 200 ms 195 ms ge5-0-5d0.cir1.seattle7-wa.us.xo.net [216.156.100.37] 6 212 ms 228 ms 229 ms vb2002.rar3.sanjose-ca.us.xo.net [207.88.13.150] 7 205 ms 204 ms 206 ms 207.88.14.226.ptr.us.xo.net [207.88.14.226] 8 207 ms 215 ms 220 ms xe-0.equinix.snjsca04.us.bb.gin.ntt.net [206.223.116.12] 9 198 ms 201 ms 199 ms ae-7.r20.snjsca04.us.bb.gin.ntt.net [129.250.5.52] 10 396 ms 391 ms 395 ms as-6.r20.sngpsi02.sg.bb.gin.ntt.net [129.250.3.89] 11 383 ms 384 ms 383 ms ae-3.r02.sngpsi02.sg.bb.gin.ntt.net [129.250.4.178] 12 364 ms 381 ms 359 ms wotsg1-slave-54.worldoftanks.sg [116.51.25.54] Trace complete. Since I think it will be unlikely that my ISP will do anything, are there any ways to improve my routing to the server without them having to intervene? NB. The game runs predominately over UDP, so I believe most low ping services are out of the question, as they rely on TCP traffic.

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  • Passwortgeschützter Traffic-meter

    - by UncleBob
    Hallo erstmal, ich habe hier ein kleines Problem für das ich bis jetzt noch keine Lösung habe. Ich lebe in Bosnien und teile hier die Internetverbindung mit der Vermieterin, und wie es in Bosnien so ist haben wir keine Flatrate, sondern eine 15 Giga traffic limite. Das wäre eigentlich mehr als genug, wenn der Sohn der Vermieterin nicht immer überziehen würde, sodass die Rechnungen immer ziemlich teuer ausfallen. Ich habe ihm bereits ein Messprogramm installiert, aber das schaltet er offensichtlich aus sobald er in die Nähe seiner Limite kommt und behauptet dann die Limite nicht überzogen zu haben. Ich brauche also mindestens ein Messprogramm das Passwortgeschützt ist und/oder im Log Zeiten vermerkt wärend denen es nicht eingeschaltet war. Noch besser wäre ein Programm das ihm den Netzzugriff einfach abklemmt wenn er seinen Anteil überschreitet, also eine Mischung aus Trafic-meter und Parental Guard. Kann mir da jemand weiterhelfen? Gtranslated version Hi first, I have a small problem for which I yet have no solution. I live in Bosnia and share the Internet connection here with the owner, and how it is in Bosnia, we do not have a flat rate, but a 15 Giga traffic limite. That would actually would be more than enough, if the son of the landlady does not always cover so that the bills always turn out quite expensive. I have it already installed a monitoring program, but he apparently turns out as soon as he comes close to its limit and then claims not to have the limit excessive. I therefore need at least a measurement program that is password protected and / or in the log notes During low periods where it has not turned on. Even better would be a program that disconnects him from accessing the network if it simply exceeds its share, ie a mixture of Traffic parameters and Parental Guard. Can someone help me there?

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  • Apache using 100% CPU, once again

    - by CBenni
    Recently, apache2 started using 100% of CPU power: top gives me From other, similar threads, I took the tip to use mod_status. Aside from HUGE amounts of NULL requests, it gives: CPU Usage: u2.16 s1.32 cu0 cs0 - .0835% CPU load 1.2 requests/sec - 17.6 kB/second - 14.6 kB/request 8 requests currently being processed, 42 idle workers The access and error logs do not show anything surprising or intriguing at all. Note the .8% CPU usage. Another tip was to use strace: root@server:~# strace -p 1956 Process 1956 attached - interrupt to quit restart_syscall(<... resuming interrupted call ...> And remains like this for at least half an hour, without producing any additional output. Restarting apache fixed the problem for less than a second The server runs a few custom python scripts aswell as a django-powered website on apache2 (up-to-date), but even turning the scripts off (or not having them active in the first place) did not change anything. After I stopped apache and powered my server off, powered it on a few minutes afterwards and restarted all my services, the CPU usage remained low for several hours, just in order to pop up again randomly (?) The DigitalOcean CPU stats on my server are: You can see how the CPU usage was super high for almost half a day until I restarted the bot - just to remain stable for several hours and then pop up again. I am completely at a loss of words and don't know what I could do to find out what piece of my code is giving me these problems or if apache itself is the cause... Therefore I would greatly appreciate any hints to the questions: What else can I try to do? Which things might I not have checked? Is this definitely in my own code? How do you find what part of python code crashes an app via a infinite loop or similar?

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  • CPU operating temperature ranges

    - by osij2is
    I have an AMD Phenom II 960T with 2 cores unlocked for a total of 6 cores. I don't overclock at all. I have a Arctic Cooling ACALP64 Heatsink/Fan installed. I'm currently running ESXi 5.0 so I have to go into the BIOS to read the CPU temperatures, which at idle seem to be in the 71-74C range. To me, this is pretty high, but I cannot find any official temperature ranges that AMD says the CPU can work well within. There seems to be a lot of questions on superuser and numerous forums around CPU temperatures but no one seems to have a clear consensus as to what the manufacturer temperature ranges are for specific CPUs. I've tried searching through AMDs site to no avail. At this point, I'd be willing to shut off the 2 extra cores if it keeps the heat down but until I get some sort of tolerance or range for temperature, I have no idea if the CPU is being damaged or not. Can anyone point to a direct source, article, FAQ from AMD that specifically states their CPUs temperature range? Or are CPU temperature ranges so varying that there's no possible baseline? Am I being too paranoid about this? To me, anything over 65C is a bit much and if I'm in the low-mid 70s range with NO VMs running, what can I expect if I have several VMs running?

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  • Many different BSOD

    - by Exa
    I'm experiencing multiple bluescreens for a couple of months now. Their error code is as diverse as their time of occurence... Sometimes it happens during gaming, sometimes when watching videos, sometimes when the computer is idle. These are the bluescreens I see most often: PAGE_FAULT_IN_NONPAGED_AREA KMODE_EXCEPTION_NOT_HANDLED IRQL_NOT_LESS_OR_EQUAL SYSTEM_SERVICE_EXCEPTION SYSTEM_THREAD_EXCEPTION INTERRUPT_EXCEPTION_NOT_HANDLED DRIVER_IRQL_NOT_LESS_OR_EQUAL DRIVER_OVERRAN_STACK_BUFFER Responsible drivers (according to the memory dumps): hal.dll tcpip.sys dxgmms1.sys ndis.sys mouhid.sys atikmdag.sys dump_atapi.sys and of course: ntoskrnl.exe My first thought was a driver incompatibility because I am using Windows 8 and some of the bluescreens seem to come from driver issues. All drivers are up to date. I'm afraid that my memory is broken or the mainboard or both. I used the windows integrated memtest which didn't find any errors. Memtest86 found some errors. Does it make sense to buy new memory? Couldn't it be a problem of the board as well? I also read that my memory could run at a too low voltage. But it's set to 1.5V as recommended. Another guess would be to set the memory's latencies manually, but how do I know which ones to try? Here is a screenshot of bluescreenview showing the latest bluescreens. Maybe someone has faced the same behavior before and found a solution. Any ideas or suggestions? Current setup on which the bluescreens occur. Windows 8 RTM (6.2.9200) Asrock 970 Extreme4 AMD FX-8150 ATI Radeon HD5850 16 GB RAM (DDR3-1800) Latest drivers for all devices

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  • Measure Upload Speed between a client and our server

    - by tresstylez
    We host a SAAS application specially customized for multiple clients. For one customer in particular -- they are reporting sporadic performance issues from various locations on their network, in particular UPLOADING documents through a form on our website. The client claims they have "bandwidth to spare" and that utilization of their "pipe" is so low that it MUST be our application, but our application has MANY clients and all features are working fine for all other clients. Interestingly enough -- DOWNLOADS (ie. just accessing the website, or downloading documents) is working fine. Speed test shows that they should get 1.2Mbps UP. So, a 3MB file should take 20 secs to upload. It takes 60+ seconds on their network. Sometimes even small files take OVER 10 minutes to upload or they timeout. Pings and Traceroutes don't show any abnormally long hops or response times. They claim other SAAS applications they use allow them to upload just fine. Both IT teams are working together to resolve this issue. What kind of data can I request from the clients to begin ruling things out. Seems like we need to somehow measure LATENCY of the networks involved or even at the switch level, we need to understand if packets are getting dropped somewhere and why. Where should I start? Any help is appreciated. I'll provide more info upon requests

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  • Sending e-mail on behalf of our customer(s), with Postfix

    - by NathanE
    We send e-mail on behalf of our customers, via our own SMTP services. It's always been a problem for us because usually our "spoofing" of their source address results in the mails being caught in spam traps. This hasn't been a problem in the past due to the small volume and low importance of these mails that we sent. However this requirement has recently changed and we need to fix this issue. We realise that fundamentally our application is sending e-mail incorrectly, as per this post: Send email on behalf of clients However, we would like to resolve the problem at the SMTP server level. We have deployed a server running Postfix. Is it possible to have Postfix automatically adjust the mail headers so that we get this "Sent on behalf of" behaviour? I figure it should just be a case of Postfix noticing that the FROM address is the spoofed (i.e. a domain that is not mentioned in its config anywhere) and therefore inject/replace the appropriate headers to get the desired effect. Thanks.

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  • Joomla performance problems on AWS

    - by Bobby Jack
    I'm running a site on AWS with the following setup: Single m1.small instance (web server) Single RDS m1.small db Joomla 1.5 Generally, the site is performant, but is fairly low-traffic - say around 50-100 visits / hour. However, at peak time, we see about double that traffic. During peak time, pretty much every day: CPU usage on the web server slowly climbs to 100% CPU usage on the RDS server climbs quite quickly to about 30%, from an average of about 15 Database connections shoot up to about 140, from a normal average of about 2 or 3 The site is then occasionally unreachable, certainly according to pingdom monitoring. Does anyone recognise this behaviour? Can you point me in the right direction to begin investigating? Of course, RDS makes it difficult to do things like slow query logging, so I've started by regularly dumping the mysql process list into a file to see if there's anything I can spot there, but it would be good to have something more concrete to investigate. UPDATE At least, can someone confirm that I'm definitely right in saying that the level of traffic implies the problem must be a specific type of query taking way longer than it should to execute? This would happen if a table gets locked, and many queries need to write to it, right? For this very reason, I've already changed the __session table type to InnoDB.

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  • 1080p monitor: connected through VGA - perfect, HDMI - awful

    - by develroot
    When I connect my 23" monitor (1920x1080) to my pc through HDMI, I encourage some problems. It's not full screen That's it. There are ~1cm black borders on right and left side and ~0,5cm black borders on the top and the bottom of the monitor. That's pretty frustrating. I tried adjusting overscan, but I can't mannualy type the % of overscan that I need. I can only select between ex. 8 and 10% in AMD Vision Engine Control center, but what I need is 9%. Next, even if i select 10% and the image fits all the corners, but after log off all the settings are lost and I have to do it again and again. Text, images, everything looks blurry That surprised me a lot. Should'nt HDMI quality be better than VGA's one? When connected through HDMI, the text isn't readable. It's like a very low refresh rate, although i'm running at 60Hz. Also the text has something like little shadows, very very annoying. Are there any tips to get the same quality as with VGA, with HDMI ? (running on integrated ATI Radeon HD4200, which, appearently, is the best card I have ever seen in terms of integrated ones)

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  • Aging SBS needs updates / Thoughts for one-off, off-line complete backup?

    - by tcv
    Hey guys, So, we checked out the status of an SBS 2003 at one of our more recent, spend-averse clients and found it to be woefully out-of-date. Scary out of date. I think it's running IE2. Ok, maybe not that far back. Anyway, I was thinking that I could use some kind of disk-imaging software to image the four IDE drives within and, in the event the server gets some kind of Update Induced Indigestion, I could completely restore. Usually my go-to software for this is Acronis, but my client will likely balk at a $500 price tag for a one-off backup with their server product. I had thought we could use the boot media from, say, Backup & Recovery 10 to take an off-line image of all the drives. According to their CHAT tech support, however, it will not work. I pressed for the technical reasons and they said they'd email me. They haven't emailed me. They still might. This server is running SBS 2003, pre sp2. It's got four IDE disks. One is a Basic disk, which contains the O/S. The others are bound as a dynamic disk. You might ask: "Don't they already have backup software?" They do! Backup Exec, a very low-end version that won't even do VSS. I don't know much about BE, but it seems to me that if the worst were to happen, it would mean building a new server O/S, installing BE (if the media is available), then restoring. Would it even work? I can take the system down for hours to do a backup and my goal here is a pretty dead-simple restore if the worst happens. Any and all suggestions are exciting. m

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  • How do I send e-mails with attachments to a Microsoft WebTV user?

    - by Petr 'PePa' Pavel
    my friend uses Microsoft WebTV (e-mail address ends with @webtv.net) and I'd like to send him an e-mail with a picture attached to it. We went through a series of attempts one of which ended up a success, all others a failure. He just can't see my e-mail in his mailbox, when it contains an attachment. E-mails without attachments always go through all right. What seemed to help in the first successful case, was that he added my e-mail address to his address book and my e-mail suddenly showed up. Seemed to have been delivered before but hidden. He kept my address in his address book however, it didn't help with the following trials. He did look into his junk folder, nothing there. I made sure the file name contains no spaces. It's a regular jpeg, named something-like-this.jpg I downsized it to have only about 50k, as I've read somewhere that that's a limit. I actually doubt this piece of information, because I think the successful attempt was larger. webtv.net contains zero information. I watched their video demo for the e-mail client, so I at least know how the user interface looks like. I've never laid my hands on the real thing. I'm an advanced user myself (a programmer) but I can't wrap my mind around this. He on the other hand, is a very technically inexperienced user and because he's half way across the globe, I can't come and look over his shoulder. He doesn't have a computer, afaik there's no way I could see what he sees. Any ideas on how to debug this? Thanks for your time, guys. P.S. I can't tag this "webtv" because such tag doesn't exist yet and my reputation is too low, sorry.

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  • High disk I/O activity in CentOS server

    - by triiim
    I have about 16 websites in a CentOS dedicated, and I am having some problems on high traffic hours, it seems to be a high disk I/O activity causing a general slowdown. I've installed atop and this is what I see on the bottom (the server has been restarted thats why the values are so low): *** system and process activity since boot *** PID RDDSK WRDSK WCANCL DSK CMD 1/18 2176 1.7G 7.3G 854.4M 39 mysqld 671 1248K 3.0G 0K 13 flush-8:0 566 0K 1.1G 0K 5 jbd2/sda2-8 2401 124.2M 529.1M 22408K 3 crond 2032 2.2G 502.0M 0K 12 nginx 2360 425.8M 115.3M 4188K 2 httpd flush-8:0 and jbd2/sda2-8 are the processes I see with iotop using 99% on the IO column, and they are the processes that write the most on the hdd (after mysql). From what I saw in google this could be caused by some ext4 related bug, the current kernel is: Linux srvr.com 2.6.32-71.29.1.el6.x86_64 #1 SMP Mon Jun 27 19:49:27 BST 2011 x86_64 x86_64 x86_64 GNU/Linux I asked the hosting support to update the kernel and they tried but they now say that the server wont boot with the new installed kernel and they had to go back to the previous, they are not helping very much. Does someone has any idea how could I solve the high disk usage caused by flush-8:0 and jbd2/sda2-8 processes?

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  • Network topology for both direct and routed traffic between two nodes

    - by IndigoFire
    Despite it's small size, this is the most difficult network design problem I've faced. There are three nodes in this network: PC running Windows XP with an internal WiFi adapter.Base station with both WiFi and a Wireless Modem (WiModem)Mobile device with both WiFi and WiModem The modem is a low-bandwidth but high-reliability connection. We'd like to use WiFi for high-bandwidth stuff like file transfers when the mobile is nearby, and the modem for control information. Here's the tricky part: we'd like the wifi traffic to go directly from the mobile to the PC, as rebroadcasting packets on the same WiFi channel takes up double the bandwidth. We can do that with a manual configuration by giving the both the PC and the base station two IP addresses for their WiFi interfaces: one on a subnet shared with the mobile, and one on their own subnet. The routes on the PC are set up so that any traffic going to the mobile via WiModem goes through the secondary IP address so that return traffic from the mobile also goes through the WiModem. Here's what that looks like: PC WiFi 1: 192.168.2.10/24 WiFi 2: 192.168.3.10/24 Default route: 192.168.2.1 Base Station WiFi 1: 192.168.2.1/24 WiFi 2: 192.168.3.1/24 WiModem: 192.168.4.1/24 Mobile WiFi: 192.168.3.20/24 WiModem: 192.168.4.20/24 We'd like to move to having the base station automatically configure the mobile and PC, as the manual setup is problematic when you start having multiple mobiles and PCs. This means that the PC can only have 1 IP address and needs to be treated as being pretty simple. Is it possible to have a setup driven by DHCP on the base station that is efficient with bandwidth?

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  • Why is my server performance degrading to the point of stopping, periodically?

    - by Pascal Aschwanden
    So, once in a while, I see in firebug that a request takes over 15 or even 60 seconds to respond and sometimes never. Here is what I've ruled out: It's not the CPU, cuz every time I check the Server load its less then 6 for all 3 numbers It's not the memory, because thats fairly low too, less the 50% It's not the I/O anymore, because I've seen the graphs that Joyent sent back to me when I requested them, and they show less then 3MB of I/O (mostly all read). It's not the SQL performance - I've profiled every last SQL command that runs, and they're all (99.9% of them anyway) running in less then 30ms, most run in less then 5ms. Oh and I've been profiling all the script execution times, and even the when the problem occurs, the script always manages to finish in 50ms or less (that's 1 / 20th of a second ). Now, I do run alot of ajax calls. 1 every 2 seconds per user and I have 300 DAU+. But, even if all 300 are playing simultaneously, thats still only 150 calls per second max. The only other thing I can think of is that one of my neighbors is funky. The problem is highly intermittent. 99% of the time it works perfectly and there's excellent performance. but 99%+ is not good enough. Eventually the performance gets so bad I have to restart the server, at which point everything is fine again. I've done this about 4 times now. Any ideas? Note: this is on joyent, vps, intro package 256mb of ram with bursting. here are the mysql dump info: Traffic ø per hour Received 18 MiB 29 MiB Sent 134 MiB 221 MiB Total 151 MiB 251 MiB Connections ø per hour % max. concurrent connections 5 --- --- Failed attempts 0 0.00 0.00% Aborted 0 0.00 0.00% Total 9,418 15.59 k 100.00%

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  • How do I lower the hardware volume? (volume too high)

    - by Zom-B
    I have a 4yo Dell laptop with Windows XP Pro (modern ones unfortunately don't have a physical volume knob), and lately I'm using my Apple earphones, because they have much better low frequency response than my $10 earphones. They also have the side effect of being much louder. To give an indication of my agony, for most tasks (movie, music, games) I have my main volume at 3 ticks: drag to 0 with the mouse and press the up key 3 times (the handle does not even raise 1 pixel) and my wave volume at 50%. I notice that when I do this, I have a lot of digital noise, because I'm using just a tiny fraction of the 16-bit space. If I drag the Wave slider down until I barely hear the audio, it becomes really distorted and noisy, indicating that this is digital volume (in the DirectSound driver or something) and not hardware volume. I experimented in Audition. When I make a tone of 1000Hz at -50db, (all windows volumes at max) the volume is just below my pain threshold. When I zoom in to see how high the sample values reach, I see that just 8 of the 16 bits are used (about -100 ~ 100). When I generate such tone at -80db (minimum I can specify) then I can still clearly hear the tone, although really noisy. When I zoom in, I see that just 3 out of 16 bits are used. I created a squarewave tone that is just 1 bit high, and I can still hear it! For most uses, this is not a big problem (audiophiles will disagree!), as I just have more noise than usual (about the same as old 8 bit hardware), but I'm also in the process of programming a hearing test program, in which case this problem is a death blow as the test subjects will even hear tones at the bottom of the theoretical range (lowering the windows volume is futile, see above) (I cannot update drivers, as Dell has discontinued XP support for my model)

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  • which is best smart automatic file replication solution for cloud storage based systems.

    - by TORr0t
    I am looking for a solution for a project i am working on. We are developing a websystem where people can upload their files and other people can download it. (similar to rapidshare.com model) Problem is, some files can be demanded much more than other files. The scenerio is like: I have uploaded my birthday video and shared it with all of my friend, I have uploaded it to myproject.com and it was stored in one of the cluster which has 100mbit connection. Problem is, once all of my friends want to download the file, they cant download it since the bottleneck here is 100mbit which is 15MB per second, but i got 1000 friends and they can only download 15KB per second. I am not taking into account that the hdd is serving same files. My network infrastrucre is as follows: 1 gbit server(client) and connected to 4 Nodes of storage servers that have 100mbit connection. 1gbit server can handle the 1000 users traffic if one of storage node can stream more than 15MB per second to my 1gbit (client) server and visitor will stream directly from client server instead of storage nodes. I can do it by replicating the file into 2 nodes. But i dont want to replicate all files uploadded to my network since it is costing much more. So i need a cloud based system, which will push the files into replicated nodes automatically when demanded to those files are high, and when the demand is low, they will delete from other nodes and it will stay in only 1 node. I have looked to gluster and asked in their irc channel that, gluster cant do such a thing. It is only able to replicate all the files or none of the files. But i need it the cluster software to do it automatically. Any solutions ? (instead of recommending me amazon s3) S

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  • Software/hardware to build video streaming server?

    - by Sasha Yanovets
    I am looking for a video streaming server solution, something like online TV server, with ability to make live broadcasts in the internet. What software could you recommend for that? What kind of hardware it should run on, should be there anything special? I am looking for a solution that could be scaled up to at least 1000 simultaneous users online with good resolution of video. I think it is good to have general answer on what direction to choose. But here more details on my specific case: I just looking for a solution almost from scratch. We have some video content that we've produced, but it is not delivered over internet yet. We do not tied to any particular vendor for now. We want to make 24 hours of steaming three 8 hour blocks with change of content every day. We want the ability to make regular live broadcasts. I guess we will need to have several options of streaming quality (low ~56 kb/s mid ~273 kb/s). Some terms just foreign to me (like play-truncation rate), if you could point out what parameters we should avare of, it would be great. Uplink to the internet is to be determined. We plan to start from something and scale up on the way. If you are already have some kind of media streaming server, just describe its configuration here (hardware, OS, software), peak number of concurrent users it serves. I think it could help people approaching this task.

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  • HP/Lenovo alternative to Buffalo iSCSI TerraStation?

    - by Robin Day
    I'm looking at virtualising some of our infrastructure in order to allow for more resiliance and future expandability. We have successfully virtualised on single servers with Direct Attached Storage and are now looking for a more future proof solution using a high powered host (or two) and a SAN (or two). I'm thinking that the host machine will probably be an HP ProLiant DL360 G7 (all of our exisiting infrastructure is HP). Unfortunately, I am new to the world of SANs. From what I can see, the Buffalo Terrastation III is all I would need in order to setup an iSCSI SAN for VMWare to use. However, I'm a little reticent to go that way as it's a bit too "entry level" for my liking. In particular I would be very keen for more redundancy, power, networking, etc. I'm also very aware that you "get what you pay for". Therefore, can anyone reccommend equivalents from the big boys? HP/Lenovo? I have searched high and low on the HP site and seen many options but am struggling to work out if it is all the hardware I will need. Some options appear to need separate controllers from disk enclosures, etc.

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  • Load is 0, yet site crawls (sometimes). What gives?

    - by Yegor
    I have a ~1.5-2mil page views per day site running on 2 servers. One for mysql, other for everything else. Mysql box has a load of 3, frontend is usually 0.0-0.1. Both are dual quad core with 8GB ram running SAS drives in raid5. CPU is idle for majority of the time, iowait is non-existent. Im running nginx, memcache, and site is built on php. Half the time everything runs perfect, while at other times it lags something severe, when it takes 10-15 seconds for a page to load. Page execution time is always super low, but it seems to hang, waiting for something before it actually loads the page. Whats even more weird is that it only happens to 1 file on the site (but its the one thats most commonly accessed, that actually loads the content on the site). Other pages are super fast at all times, even when it takes 15 seconds to load actual content. I have nginx_stats plugin installed, and if I monitor it, the lag spikes happen when the write column starts going above 100, and it frequently does... all the way to 500-1000. It does so at totally random times... not when traffic is heavy... it can do this in the middle of the night, and work perfectly at 5pm when traffic is at its highest. Any ideas?

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  • Cisco configuration for public library internet

    - by AlternateZ
    I'm a C/C++ computer programmer turned IT support guy working for a public library. My day is usually spent helping random grandparents learn how to use email, so my networking knowledge is limited to what I can glean from google. Here's the situation. We have a public library with 20 PCs on a LAN and also public wifi access. Previously we were running all of this on 1 ADSL connection and people complained about low speeds. We hired a networking company to set up a Cisco dual-WAN router for us, and purchased an additional ADSL connection. The intention was to give the LAN PCs a guaranteed amount of bandwidth each, and then let the wifi users split the rest. The results were far worse than what we expected, and all we got from the company was excuses and they've since washed their hands of us. During busy periods, net performance on the LAN PCs are so poor that attaching files to gmail etc often times out and fails - far from the "guaranteed amount of bandwidth each" that we hope for! Sometimes it feels like performance is worse than before when we had 1 ADSL link and an unconfigured router? Anyways, surely this is a problem encountered a million times over across the world? (Sharing internet across many users effectively.) What are standard solutions for something like this? I admit to not even knowing the right jargon to google for (load balancing?) I'd appreciate any links to resources/guides that might help me get a better understanding of the problem/solutions, and perhaps some stories of your own experience in solving similar problems. This will help us evaluate and negotiate with network consultants in the future. If its relevant, our router config contains a section "policy-map" with "bandwidth percent" for each class of user (LAN, wifi), and "fair queue".

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  • Why am I missing 4GB of RAM on Windows Server 2008 R2 64bit?

    - by Nick G
    I noticed today that a server was very low on memory. It physically has 8GB installed and runs Windows 2008 R2 Standard 64bit. It also hosts 2 virtual machines using HyperV. Server is Dell Poweredge R510. However the host OS reports in task manager that it only has 4GB of RAM, despite actually having 8GB and it being a 64bit OS. Computer properties shows Installed memory: 8.00GB (3.99GB usuable). Why would "usable" be half the real RAM installed under a 64bit OS? Additionally nearly all of the 4GB of visible RAM on the host OS is being used by something without anything showing up in task manager (presumably HyperV as it's allocated 3.6GB to the virtual machines its hosting). However that doesn't explain where the other 4GB has gone which Windows can't even see. Where is my missing 4GB of RAM? Update: Dell OpenManage says this: Total Installed Capacity 8192 MB Total Installed Capacity Available to the OS 4096 MB So looks like Nathan's suggestion of memory mirroring might be correct. I'll have to reboot to check this (I think?) Update 2 OK. So I reboot and I get a message saying "the amount of system memory has changed" (despite not having touched the hardware in a year). Once Windows has booted, all 8GB is visible again. Looks like I probably have a hardware RAM issue (I'll perhaps try reseating it whenever I can chuck everyone off the server next). Thanks for your answers and comments. I was hoping it was going to be the mirrored-RAM option but it seems not - that's not even mentioned in the BIOS.

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  • IP to IP forwarding with iptables [centos]

    - by FunkyChicken
    I have 2 servers. Server 1 with ip 1.1.1.1 and server 2 with ip 2.2.2.2 My domain example.com points to 1.1.1.1 at the moment, but very soon I'm going to switch to ip 2.2.2.2. I have already setup a low TTL for domain example.com, but some people will still hit the old ip a after I change the ip address of the domain. Now both machines run centos 5.8 with iptables and nginx as a webserver. I want to forward all traffic that still hits server 1.1.1.1 to 2.2.2.2 so there won't be any downtime. Now I found this tutorial: http://www.debuntu.org/how-to-redirecting-network-traffic-a-new-ip-using-iptables but I cannot seem to get it working. I have enabled ip forwarding: echo "1" > /proc/sys/net/ipv4/ip_forward After that I ran these 2 commands: /sbin/iptables -t nat -A PREROUTING -s 1.1.1.1 -p tcp --dport 80 -j DNAT --to-destination 2.2.2.2:80 /sbin/iptables -t nat -A POSTROUTING -j MASQUERADE But when I load http://1.1.1.1 in my browser, I still get the pages hosted on 1.1.1.1 and not the content from 2.2.2.2. What am I doing wrong?

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