Arne Jansen wrote: > Hi, > > Roy Sigurd Karlsbakk wrote: >> Crucial RealSSD C300 has been released and showing good numbers for use as >> Zil and L2ARC. Does anyone know if this unit flushes its cache on request, >> as opposed to Intel units etc? >> > > Also the IOPS with cache flushes is quite low, 385 is not much better than > a 15k hdd, while the latter scales better. On the other hand, from the large > drop in performance when using flushes one could infer that they indeed flush > properly, but I haven't built a test setup for that yet. >
Result from cache flush test: While doing synchronous writes with full speed we pulled the device from the system and compared the contents afterwards. Result: no writes lost. We repeated the test several times. Cross check: we pulled also while writing with cache enabled, and it lost 8 writes. So I'd say, yes, it flushes its cache on request. -- Arne _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
