On 18/02/2014 12:27, Hans J. Albertsson wrote:
1. Is it really worthwhile to mirror an SSD-based ZIL & L2ARC cache, if the SSD has proper power loss protection??
SSD logs no longer need to be mirrors, in case of a loss you can now simply delete them. But if you loose the SSD when the server panics or reboots, you can loose some TXGs, so if you want absolute data consistency, a mirror is still a good idea. With the old OSOL 2009.06, you could not import filesystems with logs that were broken, so a mirror was mandatory for a log device. -- Dr.Udo Grabowski Inst.f.Meteorology a.Climate Research IMK-ASF-SAT www.imk-asf.kit.edu/english/sat.php KIT - Karlsruhe Institute of Technology http://www.kit.edu Postfach 3640,76021 Karlsruhe,Germany T:(+49)721 608-26026 F:-926026
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