----- Original Message ----- > On Jul 20, 2010, at 6:12 AM, v <victor_zh...@hotmail.com> wrote: > > > Hi, > > for zfs raidz1, I know for random io, iops of a raidz1 vdev eqaul to > > one physical disk iops, since raidz1 is like raid5 , so is raid5 has > > same performance like raidz1? ie. random iops equal to one physical > > disk's ipos. > > On reads, no, any part of the stripe width can be read without reading > the whole stripe width, giving performance equal to raid0 of > non-parity disks.
Are you sure this is true? I know it is, in theory, but some testing with bonnie++ showed me I didn't get so large a gain. Perhaps my tests were done wrong? Vennlige hilsener / Best regards roy -- Roy Sigurd Karlsbakk (+47) 97542685 r...@karlsbakk.net http://blogg.karlsbakk.net/ -- I all pedagogikk er det essensielt at pensum presenteres intelligibelt. Det er et elementært imperativ for alle pedagoger å unngå eksessiv anvendelse av idiomer med fremmed opprinnelse. I de fleste tilfeller eksisterer adekvate og relevante synonymer på norsk. _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
