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?
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.
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).
Version 1.03 ------Sequential Output------ --Sequential Input- --Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
xfs-adaptec- 10000M 9494 7 4944 4 10659 3 98.3 0
------Sequential Create------ --------Random Create--------
-Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
files:max:min /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
50:1000:100/64 933 14 53578 99 842 13 1074 17 40257 80 478 10
xfs-adaptec-250maxtor,10000M,,,9494,7,4944,4,,,10659,3,98.3,0,50:1000:100/64,933,14,53578,99,842,13,1074,17,40257,80,478,10
Version 1.03 ------Sequential Output------ --Sequential Input- --Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
reiserfs-ada 10000M 9800 9 5003 4 10343 3 86.9 0
------Sequential Create------ --------Random Create--------
-Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
files:max:min /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
50:1000:100/64 5016 92 8231 21 8086 94 3591 88 796 4 524 9
reiserfs-adaptec-250maxtor,10000M,,,9800,9,5003,4,,,10343,3,86.9,0,50:1000:100/64,5016,92,8231,21,8086,94,3591,88,796,4,524,9
Version 1.03 ------Sequential Output------ --Sequential Input- --Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
ext3-adaptec 10000M 9814 9 5004 4 10407 3 86.6 0
------Sequential Create------ --------Random Create--------
-Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
files:max:min /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
50:1000:100/64 6820 62 47836 98 1301 5 6738 61 44981 94 1198 5
ext3-adaptec-250maxtor,10000M,,,9814,9,5004,4,,,10407,3,86.6,0,50:1000:100/64,6820,62,47836,98,1301,5,6738,61,44981,94,1198,5
--
Carl Soderstrom
Systems Administrator
Real-Time Enterprises
www.real-time.com
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