anyone of you could share if you have been using ubuntu for large scale website or critical mission project, say for 500.0000 secure transaction per 3 hours with 4 million users accessing server. how does ubuntu perform?
View 1 RepliesI have been happily using Ubuntu for a good while now. It started out sometime around the end of '09 when I purpose-built a machine to continue using WinXP Pro as my primary OS, but using a ROMTEC Trios to mechanically switch to another hard disk, booting Ubuntu Karmic. I liked the fact that the Trios kept my two disks from "seeing each other", because, at the time (and perhaps, still now), I was not ready to keep the peace between a Linux boot and a Windows boot. It was simple: use XP for "day-to-day" for a while, then power down, flip a switch, and boot up Ubuntu to get my toes wet in the Linux world.
I very quickly developed an affinity for the Ubuntu experience, and ditched my XP installation in favor of a blank slate for Linux experimentation. The disk which previously contained XP has since housed various musings of mine, including Ubuntu Studio, Puppy Studio (yes, I am a recording musician), and straight Puppy, along with some recent tinkerings with straight Ubuntu Maverick (which I've had problems with due to what I believe is lack of driver support for nvidia-96).
BTW, my current primary install is that of the original Karmic install, but upgraded to Lucid...running just fine to this date, but wondering a bit at how I'm only showing 11GB of free space on a 160GB disk...I can't quite figure where the space has gone...the math doesn't seem to work in my head, but then again, I'm still a n00b in a lot of ways.
At any rate, I've gotten a lot of mileage out of Ubuntu so far, and I'd like to experiment with "pimping" a clean Lucid installation from the ground up (as I said, I'm having graphics driver issues with Maverick, and I'd kinda like to stay with an LTS release for the time being anyway).
I'm thinking that a customized partition scheme would be a good thing to think about, and the geek in me is inclined to reach beyond the installer defaults and even beyond the common recommendations of adding a separate /home partition. I've read an awful lot about the subject, and there are as many opinions as there are underarms, but I've just gotta ask it anyway:
For a single-user desktop, is there any efficacy in using separate partitions for /boot, /tmp, /usr, /var, /opt, and/or /usr/local? I know most that I can do without a separate /srv partition, but for the others, I just wonder if I can use separate partitions for both security and optimization reasons.
I think that Centros is closely connected to Red Hat, right?And, I have heard that if you are going to go for a non-free linux system for your business, Red Hat is rated # 1 followed by OpenSuse.So, if you are going for a free linux system, is it best to go with Centros, or, is Slackware good enough?
View 11 Replies View RelatedThe Linux samba server would be part of the Windows domain.What's the best way to add shares for all of the students, assuming there is 200 students per folder? Is there a way to add a wildcard like $(USER) (that's logged in)//fileserver/ students/classof2011/Bill_Gates? Or would a directory path have to be created for each student?Either way is fine. I'm just curious what the proper protocol is for completing that task.
View 1 Replies View RelatedI'm trying to design an inexpensive large scale DNS server but fail to find any metrics or methods to base scalabilty.Can anyone offer information on building a stable dedicated DNS server? That might be able to scale well.
View 8 Replies View RelatedI have 2 ASUS Boxes (one with 8GB, one with 4GB) When both mtus are set at 7200, using scp to copy a 56MB file takes 2:06. If I reduce either mtu to 1500, the speed is 2 seconds. I'm wondering if this is some kind of kernel bug or driver bug or what. For the moment, I've lowered the mtu to 1500 to get the performance out of the machines, but find it interesting that what should make it faster is actually slowing down. Where should I post this to get it looked at? Is anyone else seeing it.I see a similar performance issue with smbclient too.
View 2 Replies View Relatedwhat is the best way to scale up server set up for a high growth site? without getting a heart attack, where you can just open up a beer and watch tv as you push a red button to scale the server. lets assume the site is getting 100,000 people a day.And, in thirty days, it will be getting 9 million people a month, and in a few months it will get 9 million people a day. (I know it is a bit crazy)How would you structure a roll out?
two load balancers, two front end app servers, two database servers, and a cdn.And as traffic builds up, you would up the front end app servers, and maybe add two slave database servers? and maybe replicate the servers to east and the west to serve different parts of the world.What kind of hardware? I know it is a bit weird question, and it matters a lot on app, server hardware, server set up, style, class, lifestyle etc - I just want to see if there are any aha moments and awesome set ups that I am not aware of.
I need to set Nagios and permissions. I get one critical error in Nagios regarding disk. It says:
DISK CRITICAL - /home/administrator/.gvfs is not accessible: Permission denied
I guess Nagios need a permission to access the administrator folder. How can I set up a permission to fix this error?
I have currently 7 servers that report logwatch every day.Fact is that it's lot of information to process every day, I would like to have as short as possible overview of events happened in last 24h is only critical/warning information . It would be + if all servers output could be gathered in 1 email
View 2 Replies View RelatedI have 10.04 desktop basically running xbmc sabnzbd and as a file server. the loads aren't too large as it is just for my house. But i moved from a server install to the desktop because of sound issues and running xbmc at start was a bit of a pain... so bit of background done.
My problem is that after installing 10.04 i got the disk utility pop-up saying one of samsung spinpoint 1tb (HD103UJ) has a critical error... now i didn't panic (although in the next couple of months i am intending to get another drive) but in the meantime i am simply wondering if this is a false flag? i've been getting this error for over 6 months now... pretty much from the last time i formatted the disk, i wiped it and then used dd to copy over a smaller partition, after which i used gparted to grow the partition to the whole drive. could this have created a false flag?
The 184 error is the only one, here is all the data i can glean from my system, attached is a screen of the relevent info from the disk utility, and this it from smartctl:
Code:
Selective self-test flags (0x0):
After scanning selected spans, do NOT read-scan remainder of disk.
If Selective self-test is pending on power-up, resume after 0 minute delay.
I just finished getting a semi-old desktop computer up and running with ubuntu server edition. It's running subversion and samba for my office of 5 people. I was wondering if there was a simple online/cloud based backup service to automatically back up my subversion repository and samba shares in case of any hardware problems?
View 1 Replies View RelatedI'm trying to create an Ubuntu Server file server that will handle large file transfers (up to 50gb) from the LAN with Windows clients. We've been using a Windows server on our LAN on the file transfers will occasionally fail... though the server is used for other services as well.
The files will be up to 50gb. My thoughts are to create a VLAN (or separate physical switch) to ensure maximum bandwidth. Ubuntu server will be 64bit with 4tb of storage in a RAID 5 config.
I recently installed a new home backup server with Ubuntu 9.10 x86_64 using the alternate CD. I used the CD's installer to partition my disk and created a software RAID 5 array on 4 disks with no spares. The root file system is located outside the raid array.
At first the array performed nicely but as it started to fill up, the io performance dropped significantly to the point where I get a transfer rate of 1-2MB/s when writing!
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Recently set up a webserver at Linode. I've been reading alot about tuning the mysql, but other than hitting web pages and seeing how fast they load, how do I tell how well my tuning is working?
View 2 Replies View Relatedhow do you measure performance on a computer?I know there are benchmark sites, they do give a general guidance in selection. However, I want to learn how to build a cluster from commodity parts and want to make sure it is equivalent to a specific server in performance.I know clustering is a bit abstract and it will be difficult to measure direct performance and compare it to one specific board. I am fine with that
View 5 Replies View RelatedI'm having trouble keeping NTP synchronized and able to provide time updates to other devices on the private network. I believe this is because the server has a too large of offset, that causes all NTP clients syncing through the server to fail.
I have two setups, one working, one failing, with mostly identical installation and settings.
Setup A is the working setup, as I will name it, is ubuntu server edition 8.04 with kernel 2.6.33.1. ntpd version is 4.2.4p4.
ntpq -p outputs this information:
remote refid st t when poll reach delay offset jitter
================================================== ============================
*europium.canoni 193.79.237.14 2 u 925 1024 377 101.851 0.194 0.328
ntp.conf is:
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dns cache serThis is probably more of a network question but I figured some one who is a network expert might know. Currently my organization has DNS servers. But my questions is would setting up a cache server improve the performance any? When I first thought about it i thought probably not. But since it stores information in ram that made me think maybe it would improve network performance a little.
View 3 Replies View RelatedI'm currently experiencing some serious issues with WRITE performance on a RAID-1 array. I'm running Ubuntu 10.04 64 bit server with the latest updates. To evaluate the performance ran the following test: [URL]... (great article btw!) Using dd to measure, write performance is only at 8.7 MB/s. Read is great though at 74.5 MB/s. The tests were ran straight after rebooting and I have not (YET!) done any kernel tuning or customization, running the default server package of the Ubuntu kernel. Here's the motherboard in the server: [URL]... with a beta bios to support drives over 300GB.
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As you can see from the bo column there is definitely something stalling. As per top output, the %wa (waiting for i/o) is always around %75 however as per above, writes are stalling. CPU is basically idle all the time. Hard drives are quite new and smartctl (smartmontools) does not detect any faults.
I built my own file server based on the Intel Atom 525 and Ubuntu 11.04 (amd64):http:[url]....It has 2 2TB Western Digital Green drives connected via SATA.Internal file transfers (disk-to-disk) using Nautilus zip along at 80 Mb/sec. Over SAMBA, however, I'm getting 35 Mb/sec. Other than creating the shares, I haven't modified smb.conf.have a gigabit network. I've run atop on the receiving computer and it isn't being taxed. At 35 Mb/sec the file server is also not being taxed.
Should I be focusing on testing the onboard NIC (RealTek 8111E) in the file server or looking at SAMBA?
I'm unable to download large files from ftp.
The ftp server is: NCFTPD.
My server is:
Version:
istributor ID:Ubuntu
Description:Ubuntu 6.06.2 LTS
Release:6.06
Codename:dapper
Linux morpheus 2.6.15-55-amd64-server #1 SMP Tue Dec 1 18:31:51 UTC 2009 x86_64 GNU/Linux
when I download, it gives an 131 error unknown.
I tried the same file on a 32 b server, same version of all except 32 instead of x64.
I am running Ubuntu 9.10 with Apache, phpMyAdmin and MySQL. Normally phpMyAdmin loads properly, but the other day I created a large database of 6,000+ tables and 1.3 GB of data in the entire database. Now phpMyAdmin loads and shows my different databases, but if I try to open the new large database, it just loads a white page with no content. Does anyone know if I can reconfigure my server so it will be able to show parts of the database?
View 2 Replies View RelatedI am having a bit of a problem with my Ubuntu Server 10.04 install. I think it might be a kernel problem. Basically, what happens is when I copy a large file (a 160GB disk image) to my drive (>60GB) the system consistently crashes after about 60GB of the file is transferred. It doesn't matter if I am sending the file using cifs, or over SSH. Checking syslog (paste dump here), it seems these flush errors always appear shortly before the crash occurs. The destination filesystem is a hardware RAID 10 array with 2TB of space. It is formatted as EXT4.
View 7 Replies View RelatedI've been using Ubuntu on my fileserver for quite a while now, and I've always really had this problem, but I want to finally address it and get it fixed. At seemingly random points (when my fileserver is under stress - typically while I'm writing lots of data to it), my fileserver will crash. It generally completely crashes, not responding to any further file requests or any of my SSH commands, and must be reset hard (typically by flipping the power switch). After such an occasion, I end up with some corrupted files. It seems to corrupt a large array of files (it's not an isolated issue - for example, it corrupts files that were not being accessed anywhere near the time it crashed, including files that had never been accessed during that period of uptime). The files don't get completely smashed, but they're definitely corrupted (artifacts in images, skips in audio and video files, often complete failure of binary files such as virtual hard drives or disc images).
I'm using Ubuntu Server 11.04, but similar issues to this happened for me in 10.04 LTS (in fact, I upgraded to try to solve them). I'm using mdadm to create an 8-drive raid6 array. The drives are 1.5 TB each, mostly Samsung HD154UI, but with a WD drive in there too (sorry, I can't find the model number at the moment). The hard drives themselves appear to be working fine - SMART reports no issues with any of them, mdadm says they're all up, and I have no reason to believe that the drives are at fault here (although I can conduct further tests if necessary). I've posted about this problem before here and here. In these cases, the issues seemed to be with XFS - in fact, I switched from XFS to ext4 on my RAID array because I simply believed XFS to be unstable. Unfortunately, this issue occurs with ext4 as well, so I'm fairly certain it's an mdadm issue. Here is the output of "cat /proc/mdstat", for those interested:
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I am running ubuntu server in a virtual environment (vmware) and have setup apache and got mediawiki up and running which I can access on host machine by going to 172.16.170.130. But this is only available on my host machine and not elsewhere on the network. How do I make it available to others on LAN and eventually on the internet (associated with my host IP address?)
View 3 Replies View RelatedI'm trying to run ssh commands though PHP on my website. I found this tutorial for it: [URL] I've got a few problems here, when I do "apt-get install openssl-dev" I get this output:
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Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Couldn't find package openssl-dev
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My ISP provided me with a static IP and I went and bought a domain name with godaddy.com. The issue I'm having now is that I am getting a 403 forbidden error (You don't have permission to access / on this server). The strange part is that when I ssh into my server, and try to go to my website, everything works fine
View 5 Replies View RelatedI was with hostgator before that provided cPanel and i "believe" they used CentOS.Now that i have moved to a different host, unmanaged, i installed copy of ubuntu 10.04 LTS 32 bit.the website is www.terwax.com.I have to put files under /var/www. So i put all the files there, including index.html (a file of joomla), but if you see the website yourself, it shows up blank page with some weird stuf
View 9 Replies View RelatedIt is vital to get a useful server performance monitoring tool that prevents growth related performance issues. Moreover, it should offer long term capacity planning and trend analysis along with detecting performance issues and unwanted outages.
View 3 Replies View RelatedI installed a month or so ago a Samba File Server along with Active Directory integration in my company. I choose to install on my newly created raid array, all in ext3 filesystem. The purpose of this fileserver is to have lots of files from the different departments on the company (all windows workstations except mine). Everyone has a private folder and a department folder, along with the common folder for all employees.did I made a mistake formating all to ext3? would I get a significant increase in performance if I resize the current ubuntu partiton and created a new NTFS new one and move the files to it?
View 2 Replies View RelatedI am in the process of running a set of performance tests for the latest Sun JVM 1.6.0_20. I am using for that the dacapo test suite: [URL]
I ran the test suite very often with all sorts of settings, but recently it happened once that my Ubuntu system froze. I could still ping the machine, but nothing else was responding any more, no screen output, no ssh login, not possible to switch consoles. After rebooting the system the system logs were quiet. No single trace of any problem.
I am using a custom compiled kernel 2.6.34: Linux i7 2.6.34-custom-201005231602 #1 SMP PREEMPT Sun May 23 16:06:01 CEST 2010 x86_64 GNU/Linux and I am experimenting around with the -XX:+UseLargePages JVM switch the requires to set-up the hugetlbfs on the Linux system: [URL]
A similar issue happened in March 2010 on one of our CentOS 5.4 systems where we run a heavy load Java application on, where we had to hard power off the machine and after the reboot there was no trace of the problem in the logs. On that server we used JDK 1.6.0_17 and did not use hugetlbfs.
My first question would be what to do so that next time something like that happens I have more information available after the incident to debug and analyse the problem?