On Mon, Nov 2, 2009 at 8:54 AM, Bill Davidsen <davidsen@xxxxxxx> wrote: > Jon Nelson wrote: >> >> I have a 4 disk raid6. The disks are individually capable of (at >> least) 75MB/s on average. >> The raid6 looks like this: >> >> md0 : active raid6 sda4[0] sdc4[5] sdd4[4] sdb4[6] >> 613409536 blocks super 1.1 level 6, 64k chunk, algorithm 2 [4/4] >> [UUUU] >> >> The raid serves basically as an lvm physical volume. >> >> While rsyncing a file from an ext3 filesystem to a jfs filesystem, I >> am observing speeds in the 10-15MB/s range. >> That seems really really slow. >> >> > > It is really slow, recent kernels seem to be unsuitable for use as large > file servers, as the performance is, as you described it, "unbelievably > bad." Yeah. I'm hoping that the 2.6.31.XX stable kernel series gets some of these improvements, the .27 series has been not the most stable for me either. 2.6.27.25 was the last rock-solid of the .27 series for me. -- Jon -- 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
