EXT3 performance on Large (multi-TeraByte) RAID

Charles P. Wright cpwright at cpwright.com
Thu May 13 02:49:35 UTC 2004

This can easily be explained by seek time.

If you have a 3GB partition on a 300GB disk, you are only using 1% of
the surface of your disk.  During the test on a smaller partition, head
doesn't have to move as far as it does with the larger partition.


On Wed, 2004-05-12 at 22:09, M K wrote:
> Has anyone experienced a significant degradation in ext3 performance
> when using it on a Multi-TeraByte RAID? As part of an experimental
> setup, I hooked up three 300GB drives and made an EXT3 RAID5 out of
> them, using the entire space one each drive, and started throwing a
> large number of files in the size-range 3KB to 50 KB. Then, I deleted
> the raid, and created a new one, but this time, I used only 3 Gigs
> from each drive (a very small RAID compared to the earlier one). After
> repeating the same test, a huge improvement in performance was see -
> hence, the question : does ext3 performance degrade significantly as
> the file system size increases?
> Thanks in Advance,
> MK
> ______________________________________________________________________
> Do you Yahoo!?
> Yahoo! Movies - Buy advance tickets for 'Shrek 2' 
> ______________________________________________________________________
> _______________________________________________
> Ext3-users mailing list
> Ext3-users at redhat.com
> https://www.redhat.com/mailman/listinfo/ext3-users

More information about the Ext3-users mailing list