January 2008 - openSUSE Users - openSUSE Mailing Lists

Re: [opensuse] Raid5/LVM2/XFS alignment
by Neil 30 Jan '08

30 Jan '08

On Jan 30, 2008 5:41 PM, Greg Freemyer <greg.freemyer(a)gmail.com> wrote: > Thanks Neil, > > I did not think about the on disk cache when I set the count. You > should also do a sync after called dd and include that in your timing. > There may even be a way from user space to tell the drives to flush > their caches. hdparm? Isn't that usually done when shutting down? I'd imagine it could cause a lot of trouble when a pc shuts down with some data in the drive cache. I dunno much about these things, but to find a program that forces the driver caches to be flushed I'd look in the shutdown scripts > > As to the block size, dd will invoke a kernel write call for each > block. In theory the kernel can coalesce those into bigger blocks, so > there is not an easy way to say what is being sent to the disk. But > the kernel should not be breaking down individual writes I don't > think. > > So as I put in another e-mail, if dd is called with bs = 3x chunksize > (for a 4-disk raid5), and the writes are stripe aligned, then the > kernel has the ability to fully optimize the parity calculation. And > parity calculation is by far the biggest performance issue related to > raid5. > > Greg > > > > On Jan 30, 2008 6:12 AM, Neil <hok.krat(a)gmail.com> wrote: > > > > On 1/28/08, Greg Freemyer <greg.freemyer(a)gmail.com> wrote: > > > On Jan 28, 2008 11:25 AM, Ciro Iriarte <cyruspy(a)gmail.com> wrote: > > > > Hi, anybody has some notes about tuning md raid5, lvn and xfs?. I'm > > > > getting 20mb/s with dd and I think it can be improved. I'll add config > > > > parameters as soon as i get home. I'm using md raid5 on a motherboard > > > > with nvidia sata controller, 4x500gb samsung sata2 disks and lvm with > > > > OpenSUSE 10.3@x86_64. > > > > > > > > Regards, > > > > Ciro > > > > -- > > > > > > I have not done any raid 5 perf. testing: 20 mb/sec seems pretty bad, > > > but not outrageous I suppose. I can get about 4-5GB/min from new sata > > > drives. So about 75 MB/sec from a single raw drive (ie. dd > > > if=/dev/zero of=/dev/sdb bs=4k) > > > > > > You don't say how your invoking dd. The default bs is only 512 bytes > > > I think and that is totally inefficient with the linux kernel. > > > > > > I typically use 4k which maps to what the kernel uses. ie. dd > > > if=/dev/zero of=big-file bs=4k count=1000 should give you a simple but > > > meaningful test.. > > > > > > I think the default stride is 64k per drive, so if your writing 3x 64K > > > at a time, you may get perfect alignment and miss the overhead of > > > having to recalculate the checksum all the time. > > > > > > As another data point, I would bump that up to 30x 64K and see if you > > > continue to get speed improvements. > > > > > > So tell us the write speed for > > > bs=512 > > > bs=4k > > > bs=192k > > > bs=1920k > > > > > > And the read speeds for the same. ie. dd if=big-file of=/dev/null bs=4k, etc. > > > > > > I would expect the write speed to go up with each increase in bs, but > > > the read speed to be more or less constant. Then you need to figure > > > out what sort of real world block sizes your going to be using. Once > > > you have a bs, or collection of bs sizes that match your needs, then > > > you can start tuning your stack. > > > > > > Greg > > > -- > > > Greg Freemyer > > > Litigation Triage Solutions Specialist > > > http://www.linkedin.com/in/gregfreemyer > > > First 99 Days Litigation White Paper - > > > http://www.norcrossgroup.com/forms/whitepapers/99%20Days%20whitepaper.pdf > > > > > > The Norcross Group > > > The Intersection of Evidence & Technology > > > http://www.norcrossgroup.com > > > -- > > > To unsubscribe, e-mail: opensuse+unsubscribe(a)opensuse.org > > > For additional commands, e-mail: opensuse+help(a)opensuse.org > > > > > > > > Isn't there a minimum to the total transmitted data to get a reliable > > reading? Something like (4 (number of disks)-1(redundant disk)) * > > 16(MB of disk cache) wich would result in 48MB minimum send in this > > case. > > I belive this because all data send to a disk is first cached (as far > > as I know) in the disk cache (most high volume drives have 16 MB of > > it). Or does DD circomvent that? > > > > Also I belive the dd block size should be above (4(number of > > disks)-1(redundand disk))*256k(array chunck size) = 768k. > > If you use a block size smaller than 256k the increased speed will not > > be visible: the system is still writing to 1 disk at a time! > > ie: bs=4k, so there are 64 blocks in each chunk > > What does dd do? It writes 64 blocks to disk 1, continues to write 64 > > blocks to disk 2, continues to write 64 blocks to disk 3, and so > > forth. (this is without paying mind to the redundancy). > > > > Correct me if I am worng, but that's the way I used to test my old raid0 array > > > > Neil > > > > -- > > There are two kinds of people: > > 1. People who start their arrays with 1. > > 1. People who start their arrays with 0. > > > > > > -- > > Greg Freemyer > Litigation Triage Solutions Specialist > http://www.linkedin.com/in/gregfreemyer > First 99 Days Litigation White Paper - > http://www.norcrossgroup.com/forms/whitepapers/99%20Days%20whitepaper.pdf > > The Norcross Group > The Intersection of Evidence & Technology > http://www.norcrossgroup.com > -- There are two kinds of people: 1. People who start their arrays with 1. 1. People who start their arrays with 0. -- To unsubscribe, e-mail: opensuse+unsubscribe(a)opensuse.org For additional commands, e-mail: opensuse+help(a)opensuse.org

1 0

[opensuse] repos back?
by Sergey Mkrtchyan 30 Jan '08

30 Jan '08

Hi List, How do you find out if the repos are back? there is nothing on the website, and when I go to the repositories link (download.opensuse.org/repositores/...), everything seems to be ok there (no messages like "currently being worked out...") When I try to update Kaffeine, Xine... it gives missing dependencies of speex, and some others too (xine, etc...). For other stuff updates seems to be working (office, KDE) Many thanks! Sergey p.s. I need to mention that unfortunately I reinstalled my system right before the crash, so I still need to update some stuff... -- Sergey Mkrtchyan, PhD Student @ Department of Physics & Astronomy, Faculty of Science, University of Waterloo -- To unsubscribe, e-mail: opensuse+unsubscribe(a)opensuse.org For additional commands, e-mail: opensuse+help(a)opensuse.org

4 10

[opensuse] ¿how can i open the floppy disquette?
by Victor Antonio Chávez de Anda 30 Jan '08

30 Jan '08

i was searching in every possible place... and i can't find what must i do for save things in my disquette... i found kfloppy but, this program format the disquette... anyone can help please? (yes, i know, this is a stupid question, but i'm new in opensuse... please, understand...) Correo escaneado contra virus Subdireccion de Tecnologia de la Informacion del ISSSTE Correo escaneado contra virus Subdireccion de Tecnologia de la Informacion del ISSSTE

1 1

[opensuse] Redirecting port 25 to another server
by Jerry Feldman 30 Jan '08

30 Jan '08

I am using Postfix on SuSE 10.3. I currently have relayhost set to my ISP, but I would like to intelligently set up an SSH tunnel to another server based on my email address: For instance, when my email address is gaf(a)blu.org, I want to set up an ssh tunnel on port 25 to the blu.org server but if my email address is not gaf(a)blu.org, or one of the virtual domains, I would just like to go to the ISP. I can easily set up a script to set up the ssh tunnel to forward my localhost port 25 to the blu mail server: ssh -L 25:blu.org:25 Alternatively, I could redirect all the email through the blu server simply by removing the relayhost from main.cf, and setting up the tunnel permanently (or by cron). So, what I am looking for is: 1. An opinion on whether I should just send all my email out on the ssh tunnel. or 2. Set up the intelligent postfix script. I can also set up my mail client to use the ISP directly for outgoing email on my ISP mail address. -- -- Jerry Feldman <gaf(a)blu.org> Boston Linux and Unix PGP key id: 537C5846 PGP Key fingerprint: 3D1B 8377 A3C0 A5F2 ECBB CA3B 4607 4319 537C 5846

1 0

[opensuse] I have been un-subscribed without my request
by Carlos E. R. 30 Jan '08

30 Jan '08

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi, Suddenly all my mails to this list were rejected, with the mail server saying I was not subscribed. Further more, the archive has dissapeared: Object not found! Object not found! The requested URL was not found on this server. If you entered the URL manually please check your spelling and try again. If you think this is a server error, please contact the webmaster. Error 404 lists.opensuse.org Wed Jan 30 15:48:16 2008 Apache/2.2.3 (Linux/SUSE) - -- Cheers, Carlos Robinson -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.4-svn0 (GNU/Linux) iD8DBQFHoJx8tTMYHG2NR9URAojlAKCBx2oe2znNzhNkLxXFq9a675ho9QCdFk+X FNWlLJqK3hwszoIfu1m5IiI= =YhMx -----END PGP SIGNATURE----- -- To unsubscribe, e-mail: opensuse+unsubscribe(a)opensuse.org For additional commands, e-mail: opensuse+help(a)opensuse.org

3 4

Re: [opensuse] I have been un-subscribed without my request
by Erik Jakobsen 30 Jan '08

30 Jan '08

Gabriel . wrote: > On Jan 30, 2008 1:49 PM, Carlos E. R. <robin.listas(a)telefonica.net> wrote: > >> -----BEGIN PGP SIGNED MESSAGE----- >> Hash: SHA1 >> >> >> >> Hi, >> >> Suddenly all my mails to this list were rejected, with the mail server >> saying I was not subscribed. >> >> Further more, the archive has dissapeared: >> >> > > mmm .... are you sure? there a a couple of mails from you in the archive: > > http://lists.opensuse.org/opensuse/2008-01/msg03303.html > http://lists.opensuse.org/opensuse/2008-01/msg03305.html > http://lists.opensuse.org/opensuse/2008-01/msg03258.html > > Maybe a problem with your ISP ? > > I had the same issue, but only for one mail, and another e-mail address, that is not in use. -- Venlig hilsen - Best regards - Erik Jakobsen Licensed HAM-RADIO with the callsign OZ4KK http://www.urbakken.dk Registered Linux user #114875 with http://counter.li.org -- To unsubscribe, e-mail: opensuse+unsubscribe(a)opensuse.org For additional commands, e-mail: opensuse+help(a)opensuse.org

2 1

[opensuse] How to mount a NFS-share as user?
by peter 30 Jan '08

30 Jan '08

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi list I got a small issue with mounting a nfs-share. One computer runs kernel-space-nfs-server with following export: /hihi *(rw,root_squash,async,no_subtree_check) (The asterisk is only for testing) The the fstab of the nfs-client contains: /etc/fstab 192.168.x.x:/hoho /haha nfs noauto,user,intr,rsize=8192,wsize=8192 0 0 But the following mount command succeed only as root: 'mount /haha' Evoked as user provides an error: 'mount: 192.168.x.x:/hoho failed, reason given by server: Permission denied' What am I doing wrong? -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.4-svn0 (GNU/Linux) Comment: Using GnuPG with SUSE - http://enigmail.mozdev.org iD8DBQFHoKJHh8q3OtgoGAwRAnhyAJ9bu3h8vVVam6qC4ZZV0mrf+qSSVQCdG/XQ k8DrHhHvSB4SugsCgGfOYqA= =sUWI -----END PGP SIGNATURE----- -- To unsubscribe, e-mail: opensuse+unsubscribe(a)opensuse.org For additional commands, e-mail: opensuse+help(a)opensuse.org

1 0

[opensuse] Any one tried in syslog-ng a "program() destination driver"?
by Carlos E. R. 30 Jan '08

30 Jan '08

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 (repost after my unsubscribe by server) Hi, I'm trying to get a program executed or do something when certain message is logged. I'm trying the following in syslog-ng: filter f_router_got_ip { host("router") and match("Received valid IP address from server"); }; destination router2 { file("/var/log/router2"); }; log { source(ext); filter(f_router_got_ip); destination(router2); }; This does work, I get the expected entry in /var/log/router2. However, if I try this, per the documentation: destination routerip { program("/usr/local/syslog-askandlogrouterip"); }; log { source(ext); filter(f_router_got_ip); destination(routerip); }; The destination program (a script) never runs. According to the documentation, the program should be loaded only once right at the start: program() This driver executes the specified program with the specified arguments and sends messages to the standard input (stdin) of the child. The program() driver has a single required parameter, specifying a program name to start. The program is executed with the help of the current shell, so the command may include both file patterns and I/O redirection, they will be processed. Declaration: program(commandtorun); Note The program is executed once at startup, and kept running until - -- Cheers, Carlos R. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.4-svn0 (GNU/Linux) iD8DBQFHoKGUtTMYHG2NR9URAr4OAJ9WbNn2fgvPNil5rt4XnuPS8OS5xwCdEJBU tjaXr3SVAQPupE0mtRP5Mu8= =sSSq -----END PGP SIGNATURE----- -- To unsubscribe, e-mail: opensuse+unsubscribe(a)opensuse.org For additional commands, e-mail: opensuse+help(a)opensuse.org

1 0

[opensuse] Problem mit nfs und openSUSE-10.3
by Frank Fiene 30 Jan '08

30 Jan '08

Hi, ich habe ein NFS-Problem. Ich habe einen Server von 10.0 auf 10.3 upgedatet und seitdem kann ich keine großen Datein mehr kopieren. Ein cp bricht bei ca. 350MB ab. Ich habe schon folgendes ausprobiert: Umstellung rsize,wsize auf 1024 (vorher 8192) auf dem Client. Auf dem Server hab ich auch schon versucht, NFSv4 abzuschalten. NFS über TCP hab ich noch nicht versucht, aber ich vermute ein anderes Problem. Brachte beides nichts, ausser das bei kleiner packet size die Transferrate von 11-12MBit auf 5-6 zusammenbricht. /var/log/messages sagt auf keiner Seite etwas dazu. Gibt es da neuerdings ein Traffic-Quota? Hilfe! -- Frank Fiene / IT-Services Fon: +49 2526 29-6200 Fax: +49 2526 29-16-6200 mailto: ffiene(a)veka.com www.veka.com VEKA AG Dieselstr. 8 48324 Sendenhorst Deutschland/Germany Vorstand: Andreas Hartleif (Vorsitzender), Dr. Andreas W. Hillebrand Bonifatius Eichwald, Elke Hartleif, Dr. Werner Schuler Vorsitzender des Aufsichtsrates: Heinrich Laumann HRB 8282 AG Münster -- To unsubscribe, e-mail: opensuse+unsubscribe(a)opensuse.org For additional commands, e-mail: opensuse+help(a)opensuse.org

2 4

[opensuse] Open Suse 10.3 64bit Hardware Compatibility "problem"
by AleXX® 30 Jan '08

30 Jan '08

Hi all, I am running OpenSuse 10.3 64bit on a Intel Dual Core 1.6Ghz CPU and MainBoard Asus P5KPL-VM (Chipset Intel CH7) and a Silicon Image SiI 3512 Sata Raid Controller (Mirror), the scope of this server is to play File/Print/Fax Server Role and I need to use the console trough the serial interface. My problem is about Hardware: The Modem I am using has to be PCI (because the only com port available has to be used for console) and I have a Conexant modem with the Linuxant Drivers Installed. The whole server is working fine unless Hylafax tries to send a Fax. Sending a fax is causing a total freeze of the server at the end of the fax handshaking... So I tried to use a different (PCI) modem with a Motorola Chipset (SM56) but I wasn't able to find any driver to make this work. So, again, I re-installed OpenSuse 10.3 32bit and the Modem started working great... but the whole system began to be pretty unstable (there is some issue with IRQ's and similar stuff...) So, again and agan, I re-installed the 64bit version of OpenSuse 10.3 and the system is Rock-Solid but the modem problem is still there... So, I am writing here seeking help in one of those option: a. Someone who can help me to fix the Conexiant Modem in the 64bit OpenSuse b. Someone who can tell me where I can find a PCI Modem Working with OpenSuse 64bit c. Someone who can tell me how to get the Motorola SM56 Modem Working d. Someone who can tell me where I can find a PCI Card with an extra Com Port that is supported by OpenSuse 10.3 (so I can use an External Serial Modem) I am totally lost in that... I've been working night and days to find some solution but I am flat and I am in a hurry... :( Thank you all... AleXX -- To unsubscribe, e-mail: opensuse+unsubscribe(a)opensuse.org For additional commands, e-mail: opensuse+help(a)opensuse.org

3 2