On Thu, May 20, 2010 at 2:19 AM, Marc Bevand <m.bev...@gmail.com> wrote: > Deon Cui <deon.cui <at> gmail.com> writes: >> >> So I had a bunch of them lying around. We've bought a 16x SAS hotswap >> case and I've put in an AMD X4 955 BE with an ASUS M4A89GTD Pro as >> the mobo. >> >> In the two 16x PCI-E slots I've put in the 1068E controllers I had >> lying around. Everything is still being put together and I still >> haven't even installed opensolaris yet but I'll see if I can get >> you some numbers on the controllers when I am done. > > This is a well-architected config with no bottlenecks on the PCIe > links to the 890GX northbridge or on the HT link to the CPU. If you > run 16 concurrent dd if=/dev/rdsk/c?d?t?p0 of=/dev/zero bs=1024k and > assuming your drives can do ~100MB/s sustained reads at the > beginning of the platter, you should literally see an aggregate > throughput of ~1.6GB/s...
SuperMicro X8DTi motherboard SuperMicro SC846E1 chassis (3Gb/s backplane) LSI 9211-4i (PCIex x4) connected to backplane with a SFF-8087 cable (4-lane). 18 x Seagate 1TB SATA 7200rpm I was able to saturate the system at 800MB/s with the 18 disks in RAID-0. Same performance was achieved swapping the 9211-4i for a MegaRAID 8888ELP. I'm guessing the backplane and cable are the bottleneck here. Any comments ? -- Giovanni _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
