koan wrote: > Are you sure about that chunk size? In you initial posting you show > /proc/mdstat reporting: > > "md2 : active raid5 sdc3[2] sda3[0] sdb3[1] > 780083968 blocks level 5, 128k chunk, algorithm 2 [3/3] [UUU]" > > Which would seem to state a 128K chunk, and thus with a 4k block size > you would need a stride of 32.
Hi Koan, Yes, I'm sure... Those 128K chunk was my initial setup, before the enlightenment from http://tldp.org/HOWTO/Software-RAID-HOWTO-5.html My reported test setup is by using 256K chunk. > > > > On 7/18/07, Rui Santos <[EMAIL PROTECTED]> wrote: >> koan wrote: >> > How did you create the ext3 filesystem? >> >> The chunk_size is at 256KB, ext3 block size is 4k. I believe the correct >> option that should be passed trough to --stride is 64. >> Am I correct ? >> >> I've also tested ( after sending my first report ) with xfs. >> I've also increases readahead to 65535 on all HD's >> I've also increases the stripe_cache_size to 16384. >> >> I can now get ~100MB/sec... >> >> > >> > Did you use the appropriate --stride option as noted here: >> > http://tldp.org/HOWTO/Software-RAID-HOWTO-5.html (#5.11) >> > - >> > To unsubscribe from this list: send the line "unsubscribe >> > linux-kernel" in >> > the body of a message to [EMAIL PROTECTED] >> > More majordomo info at http://vger.kernel.org/majordomo-info.html >> > Please read the FAQ at http://www.tux.org/lkml/ >> > >> > >> > >> >> > > > - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/