Hello list, I have searching the bottleneck of my system, and found something what i cant cleanly understand. I have use NBD with 4 disk nodes. (raidtab is the bottom of mail) The cat /dev/nb# >/dev/null makes ~ 350 Mbit/s on each nodes. The cat /dev/nb0 + nb1 + nb2 + nb3 in one time parallel makes ~ 780-800 Mbit/s. - i think this is my network bottleneck. But the cat /dev/md31 >/dev/null (RAID0, the sum of 4 nodes) only makes ~450-490 Mbit/s, and i dont know why.... Somebody have an idea? :-) (the nb31,30,29,28 only possible mirrors) Thanks Janos raiddev /dev/md1 raid-level 1 nr-raid-disks 2 chunk-size 32 persistent-superblock 1 device /dev/nb0 raid-disk 0 device /dev/nb31 raid-disk 1 failed-disk /dev/nb31 raiddev /dev/md2 raid-level 1 nr-raid-disks 2 chunk-size 32 persistent-superblock 1 device /dev/nb1 raid-disk 0 device /dev/hb30 raid-disk 1 failed-disk /dev/nb30 raiddev /dev/md3 raid-level 1 nr-raid-disks 2 chunk-size 32 persistent-superblock 1 device /dev/nb2 raid-disk 0 device /dev/nb29 raid-disk 1 failed-disk /dev/nb29 raiddev /dev/md4 raid-level 1 nr-raid-disks 2 chunk-size 32 persistent-superblock 1 device /dev/nb3 raid-disk 0 device /dev/nb28 raid-disk 1 failed-disk /dev/nb28 raiddev /dev/md31 raid-level 0 nr-raid-disks 4 chunk-size 32 persistent-superblock 1 device /dev/md1 raid-disk 0 device /dev/md2 raid-disk 1 device /dev/md3 raid-disk 2 device /dev/md4 raid-disk 3 - 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
