Messages in this thread | | | Date | Sat, 10 Nov 2001 18:41:15 +0100 (CET) | From | Oktay Akbal <> | Subject | Re: Numbers: ext2/ext3/reiser Performance (ext3 is slow) |
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On Sat, 10 Nov 2001 arjan@fenrus.demon.nl wrote: > ext3 by default imposes stricter ordering than the other journalling > filesystems in order to improve _data_ consistency (as opposed to just > the guarantee of consistent metadata as most other filesystems do). > if you mount the filesystem with > > mount -t ext3 -o data=writeback /dev/foo /mnt/bar > > will make it use the same level of guarantee as reiserfs does. > > mount -t ext3 -o data=journal /dev/foo /mnt/bar
test with writeback and journal a already running. But this will take some time. as far as i can tell now writeback is really much faster. The question is, when to use what mode. I would use data=journal on my CVS-Archive, and maybe writeback on a news-server. But what to use for an database like mysql ? Someone mailed me and asked why use a journal for an database ? Well, I think for speed of reboot after failover or crash. I don't know if mysql journals data itself.
Oktay Akbal
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