Hi, On Tuesday 07 March 2006 16:23, Carl Wilhelm Soderstrom wrote: > I'm experimenting with an external firewire drive enclosure, and I > formatted it with 3 different filesystems, then used bonnie++ to generate > 10GB of sequential data, and 1,024,000 small files between 1000 and 100 > bytes in size. > > I tried it with xfs, reiserfs, and ext3; and contrary to a lot of hype out > there, ext3 seems to have won the race for random file reads and deletes > (which is what BackupPC seems to be really heavy on). > > Reiserfs of course wins hands-down when it comes to *creating* files, but > isn't always so good at reading them back or deleting them. > > Am I missing something here? Am I mis-interpreting the data? Is there > anyone else out there with more bonnie experience than I, who can suggest > other things to try to gain more surety about this?
I think you're right. I have 2 suggestions for additional testing. It's my experience that backuppc became really really slow after a few weeks when more data began to accumulate. Could you test ext3 again, but with a few million more files? I'm also rather interested to know if the dir_index option of ext3 makes any difference. Could you try that too (mke2fs -j -O dir_index /dev/whatever) please? You can let bonnie use softlinks or hardlinks instead of real files in the test, so maybe that would be a nice additional test to run. > Of course, one of the nice things about Reiserfs is that you don't have to > worry about running out of inodes. For that alone, it is likely worthwhile > on backuppc storage filesystems. mke2fs -j -T news should take care of that. > This was done with an 800MHz Dell X200 laptop with an Adaptec external > drive enclosure, attached via firewire (400M). The filesystem was > re-created between each run, then the same bonnie command re-run. > In my copious spare time, I should try this on another testbed machine I > have. (Also, more runs on the same box, since they seem to vary somewhat). What kernel did you use? Regards, Guus ------------------------------------------------------- This SF.Net email is sponsored by xPML, a groundbreaking scripting language that extends applications into web and mobile media. Attend the live webcast and join the prime developer group breaking into this new coding territory! http://sel.as-us.falkag.net/sel?cmd=lnk&kid=110944&bid=241720&dat=121642 _______________________________________________ BackupPC-users mailing list BackupPC-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/backuppc-users http://backuppc.sourceforge.net/
