"Rick Gigger" <[EMAIL PROTECTED]> writes: >> This is only a problem for ext2. Ext3, Reiser, XFS, JFS are all fine, >> though you get better performance from them by mounting them >> 'writeback'. > > What does 'writeback' do exactly?
AFAIK 'writeback' only applies to ext3. The 'data=writeback' setting journals metadata but not data, so it's faster but may lose file contents in case of a crash. For Postgres, which calls fsync() on the WAL, this is not an issue since when fsync() returns the file contents are commited to disk. AFAIK XFS and JFS are always in 'writeback' mode; I'm not sure about Reiser. -Doug ---------------------------(end of broadcast)--------------------------- TIP 7: don't forget to increase your free space map settings
