On Wed, 21 Nov 2007, Ian G Batten wrote: >> however a fsync on a journal ed filesystem just means the data needs to be >> written to the journal, it doesn't mean that the journal needs to be >> flushed to >> disk. >> >> on ext3 if you have data=journal ed then your data is in the journal as well >> and >> all that the system needs to do on a fsync is to write things to the >> journal (a >> nice sequential write), > > Assuming the journal is on a distinct device and the distinct device can take > the load. It isn't on ZFS, although work is in progress.
I was responding to the comments about ext3 and other journal ed filesystems as alternatives to zfs and the claim that doing a fsync on one of them required flushing the entire journal. sorry if I wasn't clear enough about this. David Lang ---- Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
