Jeff Frost wrote:
> Is it reasonable to mount the PGDATA filesystem with data=writeback on ext3 as
> long as the PGXLOG filesystem is mounted data=ordered and fsync=on? Or is
> this only acceptable if you have battery backed controllers?
data=writeback is fine on all PostgreSQL file systems, including pg_xlog
because we fsync() it on commit. In fact it is the recommended mount
option for ext3.
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Bruce Momjian | http://candle.pha.pa.us
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