Aug '09 23

Ext3/4 performance

I’ve converted my /home partition to EXT4, and running my root partition as EXT3. While EXT4 looks good, for some reason i’m getting bad write performance on RAID1, compared to a normal JBOD disk, which i would expect to be the same. I found an article about boosting performance of Ext3/4 and another with some perfomance tips, include reserved space. I think I’ll update to using writeback and noatime on home, as per this Forum.

Some interesting test results. I’m not sure if the low bandwidth on my ext (root) partition is influencing the results?
EXT3 - 2097152000 bytes (2.1 GB) copied, 66.2435 s, 31.7 MB/s. Deletion time - real 0m1.205s
EXT4 - 2097152000 bytes (2.1 GB) copied, 27.885 s, 75.2 MB/s. Deletion time - real 0m0.575s
JFS - 2097152000 bytes (2.1 GB) copied, 28.7924 s, 72.8 MB/s. Deletion time - real 0m0.273s

Need to re-do the tests with a larger file, all on the same disk, so bandwidth isnt an issue.