Ubuntu Servers :: Next Steps In Improving SAMBA Performance?
Jul 13, 2011
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?
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Oct 15, 2010
1) Disable blur effect in System settings>Desktop effects>All effects.
2) Press Alt+F2 and type oxygen-settings. Then go to "animations" tab and uncheck "enable animations". Also under "Window decorations" uncheck "enable animations".
3) System settings>Application appearance>Style>Fine tuning tab. Choose "Low display resolution and low CPU"
4) System settings>Desktop effects>Advanced tab choose fastest texture filter.
5) If your desktop effect are disabled on every reboot then you'll have to disable functionality checks. Go to System settings>Desktop effects>Advanced and check "disable functionality checks".
6) If you are running opensource drivers (ati or intel cards) you could try to improve your desktop effects with updating your drivers from xorg-edgers ppa. If updated drivers doesn't work better, you could safely downgrade your drivers to official ones with ppa-purge comand.
Code:
sudo apt-get install aptitude
sudo apt-add-repository ppa:xorg-edgers/ppa
sudo aptitude update
sudo aptitude install ppa-purge
sudo aptitude safe-upgrade
Then reboot. If updated drivers do not work better you can downgrade them:
[Code]....
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Feb 4, 2010
I am starting to get bottlenecks in the loading of webpages via squid. It is not the actual playback of video that has performance issues, this is very good. However, when a webpage is first requested, it is the initial response that takes more than a few seconds to load the page. I am wondering how to troubleshoot the issue as I don't know whether it is squid, the dns lookup, the number of users, RAM, or the bandwidth. Bandwidth seems to be the least likely since the server has a high bandwidth and video streaming appears to have no problems. I do not have caching turned on yet, which would certainly help because I do not want to cache flb, mp3, etc. files and the last time I turned on caching the performance was actually worse. The slow loading of pages has only just beguin to creep into the performance, it wasn't an issue before.
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Jun 4, 2010
I 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?
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Aug 1, 2011
I have a WinXP virtual box and have setup a Samba server to have it use directly a couple of directories on the Linux side. The Samba performance is definitely better than the built-in shared folders of the virtualbox, but there is nothing to write home about either: transfer seem to top at around 3Mbyte/sec.
The machine is a laptop (Core i5 CPU (M520@2.40GHz) and a 7200RPM HDD) running Kubuntu 10.04.The Samba share uses a dedicated "host-only" network adapter. There is an iptable-based firewall to which i added the required 4 statements to let the Netbios traffic go through (without them nothing works...)So, given the hardware, are the 3MB/s a decent figure? And if not, what should I aceeive, and where can I look improve on the current numbers?
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May 29, 2010
Setup a SVN for my network
Please tell me the complete steps for that
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Jan 4, 2011
I have installed a linux server, centos gui server with Raid1, his role will be only a file server. I installed samba and configured it. The file system is EXT3. the server got 4 gigs of memory.There is a program in windows that writes files to the share.I searched and i found that there is some commands that you add and they boost the performance.
I got complains that the writes are not fast enough. Before me another IT guy configured the file server and it was faster, what he told my customer that he changed some command of cache but i dont know exactly what he did. I have been asked to find how to boost the performance.Please give me more commands to try to boost the performance of Samba or tell me if i need to change anything..
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Mar 18, 2010
I wish to prevent the samba messages (mainly nmbd and winbindd) from appearing in the system log (/var/log/messages). I want to allow samba logging to the standard samba logfiles, but prevent the syslog getting clogged up by samba. I added syslog = 0 to smb.conf and reloaded the config but the messages were still appearing. I also tried the following (and restarted the syslog via /sbin/service syslog restart) # Suppress messages from samba.
nmbd.* /dev/null
smbd.* /dev/null
winbindd.* /dev/null
For interests sake the messages I'm getting are below (I'm not concerned about the messages themselves, I can chase them up at my leisure via the samba logs) Mar 18 09:58:29 SERVER nmbd[3808]: query_name_response: Multiple (2) responses received for a query on subnet xx.yy.z.zz for name DOMAIN<1d>. Mar 18 09:58:29 SERVER nmbd[3808]: This response was from IP xx.yy.z.zz, reporting an IP address of xx.yy.z.zz.
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Mar 5, 2010
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!
[Code]...
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Mar 9, 2011
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?
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Aug 3, 2011
how 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
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Feb 26, 2010
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.
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Sep 7, 2010
I'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.
[code]...
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.
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Nov 26, 2010
this is my output when I try to compile samba 4.0.0 alpha 7 in Ubuntu using the spec file provided in the samba packages:
bin/mergedobj/samba-util.o: In function `file_lines_parse':
(.text+0x595c): undefined reference to `_talloc_steal'
bin/mergedobj/samba-util.o: In function `data_blob_talloc_named':[code]....
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Mar 11, 2010
Mac and Windows Vista have such pretty user interfaces with all the transparencies and stuff. Is there anything for Ubuntu Linux to improve the way it looks?
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Apr 10, 2010
My camera takes (QuickTime) videos with abominable sound quality. I've got one that I'd like to improve the sound quality on. What I'd actually like to do is to separate out the audio track, run some filters over the audio track with Sox, and then splice it back in. I'm comfortable doing the sox-based improvements, but have no idea how to get the sound out of the video in the first place or to mix it back in. Perfectly comfortable with winding up with a non-Quicktime video as a result, though.
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Jul 5, 2011
I use a Mac, but do all my development on a remote Linux machine which I access over SSH. Recently I've started using X forwarding to show some of the remote machine's graphical applications in windows on the Mac desktop. For the most part, this works really well - except that the applications look terrible: huge fonts, ugly widgets. Being the Mac-using perfectionist I am, I want to try and improve the look of these windows. Is there any way of using alternative widgets in an X-forwarded application? What would I need to install on the Mac, or on the remote machine?
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Apr 29, 2010
im interested in improving my web designing. ive been trying to learn ajax and flash completed a couple tutorials and i was thinking about starting a project. the goal of the project is to make a banner on top of a webpage that basicly is a slide show of thumbnails. but at the same time when u click on the image that flashes by it send you to the page where u can buy a print of the image. when you hover over the banner it stops. and is all contained in its own box. i did try to use a banner slide show box b4 but it didnt do everything i wannted and at the same time it expanding the length of the webpage as it scrolled the top.i was wondering how i might get the tools and knowlege i need to acomplish my goal.
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Feb 9, 2010
It 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.
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Jun 6, 2010
I 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?
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Sep 4, 2010
I run a dedicated specialty Quake 3 Arena Server.It currently runs a stock Debian 5.05. These are the hardware specifications.
256mb SD Ram
10gb Hard Drive
Intel Celeron
I think I should be getting more speed then I am.I would like to install Ubuntu Server.What version is the most stable, and will provide the best speed?I have to download my server files from the internet. Is this possible without the GUI?Is there anyway to control my server remotely, without any impact on performance, VNC is a huge impact.I want to run a mail server as well, is this possible with out a performance hit?
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Apr 25, 2011
I am using MonoDevelop with SQL Server whenever I try to do use the Select method on the Datatable object the performance really detoriates it is 3 times slow than it is with .Net. Are there any work arounds?
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Aug 6, 2011
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?
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Aug 18, 2011
It stores all my important stuff, as well as some music and movies.I use a second linux box in my living room to "stream" content via NFS or SAMBA share.The streaming tends to stop several times during playback, and needs to fill up its buffer again before continuing to play.I also have some Windows XP and 7 based computers that connect to this file server.I have noticed that directory listing is VERY slow, and there is a huge lag when I want to save/read a file from/to my home directory.
This is my setup:Ubuntu Server 10.10 64 bit (I have the same problem with 32bit ubuntu)
3 RAID5 arrays with 4 hard drives eachLVM on top of the 3 raid5 arrays.The Logical Volume i use is about 6.5TB, and I use the ReiserFS file systemThis LVM has grown over the years, and has had som replaced disks. So I have used the pvmove, and extend commands a bit.I have tried using IOTop and top to check if there is not enough resources available, but that doens't seem to be the problem.I haven't been able to find out why streaming over the network stops, but I know it is the server that causes the problem.Does ReiserFS have any performance problems with large logical volumes? Would changing to EXT4 or some other FS give any performance gain?
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Jul 31, 2010
I just wanted to know if having my laptop set to ondemand, will this affect performance in any way? I realize it increases the clock speed to performance when the CPU is under load, but does the time it take to go from ondemand to performance affect speed? Will there be any noticeable difference between the two setups? I have a dual core intel at 2.2GHz when in performance. When ondemand is set with no load it downclocks to 800Mhz.
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Jun 15, 2009
The kvm and qemu packages are integrated into a single package, but this doesn't mean qemu is integrated into the kernel now in any way does it? I should still install kqemu to the the performance improvements, right?
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Jun 7, 2010
On F13 i386 inside Virtualbox. Host is a Win7 x64 box.
This may just be more idle curiosity than anything else since the server still works. . . but it's really bothering me because I can't explain it.
My (limited) understanding is that the devel files are just the source files and shouldn't actually affect peformance.
Yet, prior to installing httpd-devel (and its dependencies), /etc/init.d/httpd restart takes about 2 seconds total. After installing httpd-devel, the "stopping" phase of the httpd restart take 5-7 seconds (which seems really long when you're just sitting there waiting on it.
yum install httpd-devel also installs the following for dependencies:
db4-cxx
db4-devel
cyrus-sasl-devel
apr-devel
apr-util-devel
openldap-devel
expat-devel
All but one of those are devel files as well. And here's the real kicker: Uninstalling them through YUM doesn't put things back to normal (even after reboot).
I'm no linux expert. But I wouldn't think installing devel files would have this effect or any effect like this since they're just source code files (?). Can anyone explain what's happening or give me tips on how I can watch the apache process stop and see what's hanging it up?
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Feb 4, 2010
I recently got myself a new hard drive and I want to use it as my Samba share. I just want the hard drive itself to store the files.I know once I get it set up it should be easy to tell Samba that's where I want it to store and look for files.Problem is I need to make it so the computer can use the hard drive first. I have already installed the drive. I just don't know how to get Ubuntu to recognize the drive.I also need to create a partition that uses the whole drive and format it to ext3, then I need to mount it somewhere for Samba to use.This would be easy to do with Ubuntu desktop, but I am using Ubuntu server and I don't know how to do it. I have read that I will need to use fdisk, but the post wasn't to clear on what to do.
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Feb 16, 2010
i have ubuntu server 8.04 witch preinstalled samba 3.0.28. I like to install from repositories samba 3.4.5.
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Mar 16, 2010
this is my first post ever, so sorry if i'm not very descriptive. I just installed Ubuntu Server 9.10 x86 and I cannot use the net command that comes with Samba
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