On Thu, Nov 6, 2008 at 2:05 PM, Scott Carey <scott@xxxxxxxxxxxxxxxxx> wrote: > To others that may stumble upon this thread: > Note that Write Barriers can be very important for data integrity when power > loss or hardware failure are a concern. Only disable them if you know the > consequences are mitigated by other factors (such as a BBU + db using the > WAL log with sync writes), or if you accept the additional risk to data > loss. Also note that LVM prevents the possibility of using write barriers, > and lowers data reliability as a result. The consequences are application > dependent and also highly file system dependent. I am pretty sure that with no write barriers that even a BBU hardware caching raid controller cannot guarantee your data. -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
