On Fri, Jan 24, 2014 at 08:56:02AM -0600, Matt Garman wrote: > On Fri, Jan 24, 2014 at 6:04 AM, <keld@xxxxxxxxxx> wrote: > > The reading is not balanced because it does not make sense to do balanced > > reads for sequential reading. In RAID-1 the disk sectors are consequitive. > > So if you would read one sector from one disk, and the following sector from the other disk, > > then the next read from disk 1 would need to skip a full resolvation of the disk, > > which may cost something like 8 ms. So better read contigously from the same disk, and hope > > for some other IO request that can use disk 2. > > > Does that rationale hold for SSDs? No, this is not relevant for SSDs as access time is almost zero. best regards keld -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
