[lkml]   [2000]   [Nov]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: e2fs performance as function of block size
Alan Cox wrote:
> I see higher performance with 4K block sizes. I should see higher
> latency too but have never been able to measure it. Maybe it depends
> on the file system.
> It certainly depends on the nature of requests

If the files get somewhat bigger (eg. > 1G) having a bigger block
size also greatly reduces the ext2 overhead. Especially fsync()
used to be really bad on big file but choosing a bigger block
size changed a lot.

If the database used by the original poster is based on
something like c-isam then (AFAIR) it is in fact using
1k blocks which may explain the better results of 1k block
size. With a 100 MB file size fs management overhead should
not be that visible.


Michael Marxmeier Marxmeier Software AG
E-Mail: Besenbruchstrasse 9
Phone : +49 202 2431440 42285 Wuppertal, Germany
Fax : +49 202 2431420
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
Please read the FAQ at

 \ /
  Last update: 2005-03-22 12:47    [W:0.067 / U:0.328 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site