On 06/23/10 14:00, Florian Weimer wrote: > * Ivan Voras: > >> On the other hand, RAID10 is simple enough that soft-RAID >> implementations should be more than adequate - any ideas why a dedicated >> card has it "slow"? > > Barrier support on RAID10 seems to require some smallish amount of > non-volatile storage which supports a high number of write operations > per second, so a software-only solution might not be available. If I understand you correctly, this can be said in general for all spinning-disk usage and is not specific to RAID10. (And in the case of high, constant TPS, no amount of NVRAM will help you). -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
