-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Luis Paulo wrote: > Hi, Adam > 38.3 MB/s seems a very high speed for old IDE disks through NFS
Sorry, that is a RAID1 array made up of these two disks (cat /proc/hd[ac]/model): WDC WD800JB-00ETA0 8M cache WDC WD800JB-00ETA0 8M cache Specs available at http://wdc.custhelp.com/cgi-bin/wdc.cfg/php/enduser/std_adp.php?p_faqid=699 > I'll expect that speed measuring the disk on the machine, not through > the home LAN No, it is definitely speed over the LAN. The machine I was testing from is a diskless system, so it has no local HDD at all. Definitely testing over NFS. > Thanks for the command. I think of=/tmp/test may be wrong. Or not, I'm > really no expert here. of=/tmp/test specifies the output file (of=) as /tmp/test which is just a scratch file.... It will overwrite the existing file if it exists. > I have a similar configuration (2x250 SATA1 local disks with lvm/mdadm), > and I'm interested on NAS, not for backuppc (not for now, at least) > 104857600 bytes (105 MB) copied, 10.8521 s, 9.7 MB/s (NFS mount) Locally on the NFS server I get varying results (this is under a live load!) 104857600 bytes (105 MB) copied, 8.99671 s, 11.7 MB/s 104857600 bytes (105 MB) copied, 2.14727 s, 48.8 MB/s 104857600 bytes (105 MB) copied, 5.18016 s, 20.2 MB/s 104857600 bytes (105 MB) copied, 2.097 s, 50.0 MB/s Each run done a few seconds apart. I don't think cacheing is an issue here, cache should be much faster than that! nfsserver:/proc/ide# hdparm -tT /dev/md0 (the RAID array) /dev/md0: Timing cached reads: 454 MB in 2.00 seconds = 226.61 MB/sec Timing buffered disk reads: 104 MB in 3.01 seconds = 34.49 MB/sec > I also have a running 100Mb LAN, shouldn't we start there? How to get a > 1Gb LAN, that is, maybe the NAS speed are limited by that. Well, on a 100M LAN, you are looking at a max speed of around 10MegaBytes/sec... This is way under the desired performance ... hence I've upgraded my switch plus ethernet cards to operate at 1G which should give approx 100MegaBytes/sec transfer speed. > Forgive if I said something very stupid. No problem, just trying to get some decent performance out of this. BTW, I've also got other issues with the device that I am working through with netgear (slowly)... Regards, Adam - -- Adam Goryachev Website Managers www.websitemanagers.com.au -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEARECAAYFAku74eEACgkQGyoxogrTyiVbuACePKYhdpIIXjKyBzgALJ7KN2l/ R0EAoKRzXlLna/SOyIQDaI3DbTRLIplY =R0qm -----END PGP SIGNATURE----- ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ BackupPC-users mailing list BackupPC-users@lists.sourceforge.net List: https://lists.sourceforge.net/lists/listinfo/backuppc-users Wiki: http://backuppc.wiki.sourceforge.net Project: http://backuppc.sourceforge.net/
