> is there a way to batch explicitely write requests raid5 issues? sort of like TCP_CORK? > for example, there is a raid5 built from 3 disks with chunk=64K. > one types dd if=/dev/zero of=/dev/md0 bs=128k count=1 OK, so this is an aligned, whole-stripe write. >and 128K > bio gets into the raid5. raid5 processes the request, does xor > for parity stripe, then issues 2 64KB requests down to lower level. don't you mean _3_ chunk-sized writes? if so, are you actually asking about the case when you issue an aligned two-stripe write? (which might get broken into 6 64K writes, not sure, rather than three 2-chunk writes...) _not_ that I know this code at all! - 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
