> Rumour has it that data=journal can actually improve performance in some > situations. If a program is writing lots of small files synchronously (quite > common for a mail server that has one tiny control file for every message, > and the average message file isn't too big) then journalling the data allows > for synchronous writes to a small (8M to 32M) region on disk (which is really > fast) and it'll then be written to it's final destination with the write-back > caching enabled which allows writes to be ordered for good performance.
Not rumour... I confirm I have seen the benchmarks for this somewhere. It was in a table format... it compared EXT3 with the various options, REISERFS which various options... too bad I can't remember the webpage, aye? But i am sure it is there somewhere, so I'm sure if you search long enough it'll pop up in google.com or alltheweb.com > Without the data=journal option ReiserFS is rumoured to beat Ext3, with > data=journal ext3 should win. > I would be interested in seeing benchmark data. Also one thing I have been > thinking of doing is benchmarking Qmail vs Postfix... ;) Can I see a mail war brewing? ;-)
