On Wed, 7 Nov 2012, Gandalf Corvotempesta wrote: > I'm evaluating some SSD drives as journal. > Samsung 840 Pro seems to be the fastest in sequential reads and write. > > What parameter should I consider for a journal? I think that none of > read benchmark are influent because when dumping journal to disk, the > bottleneck will always be the SAS/SATA write speed. (in this case, the > SSD will never reach it's read best performance) > So, should I evaluate only the write speed when datas are wrote to the > journal ? Sequential or random ?
Sequential write is the only thing that matters for the osd journal. I'd look at both large writes and small writes. sage -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
