On Wed, Aug 21, 2002 at 09:55:57AM +0200, Mindaugas Riauba wrote: > From what I read I understood that for typical operations > data=ordered is prefered. For the cases when there are many writes > not appending to files data=journal is the choice. And if I want to > get the most performance or in case where program is doing journaling > itself (Oracle) - data=writeback is the answer. My rationale is this: I use data=journal for a Postfix queue. How much data can come in via the 100MBit backbone in 5s (the commit interval): 100MBit/s * 5s = 500MBit The journal should be about that size. > But what about the size of the journal? The only clues I found is > that data=journal journal should be the size ~ 5 seconds worth of > writes to the disk. And that other types journals are typically > sized enough by default. One could argue that the journal must be 5s * max transfer rate/s big. How do I estimate that? -- Ralf Hildebrandt (Im Auftrag des Referat V A) Ralf.Hildebrandt@charite.de Charite Campus Virchow-Klinikum Tel. +49 (0)30-450 570-155 Referat V A - Kommunikationsnetze - Fax. +49 (0)30-450 570-916 Sysadmins don't go to hell; we're already doing our time in purgatory.
