Mertol Ozyoney wrote: > > 2540 controler can achieve maximum 250 MB/sec on writes on the first > 12 drives. So you are pretty close to maximum throughput already. > > Raid 5 can be a little bit slower. >
I'm a bit irritated now. I have ZFS running for some Sybase ASE 12.5 databases using X4600 servers (8x dual core, 64 GB RAM, Solaris 10 11/06) and 4 GBit/s lowest cost Infortrend Fibrechannel JBODs with a total of 4x 16 FC drives imported in a single mirrored zpool. I benchmarked them with tiobench, using a filesize of 64 GB and 32 parallel threads. With an untweaked ZFS the average throughput I got was: sequential & random read > 1GB/s, sequential write 296 MB/s, random write 353 MB/s, leading to a total of approx. 650,000 IOPS with a maximum latency of < 350 ms after the databases went into production and the bottleneck are basically the FC HBA's. These are averages, the peaks flatline with reaching the 4 GBit/s FibreChannel maximum capacity pretty soon afterwards. I'm a bit disturbed because I think about switching to 2530/2540 shelves, but a maximum 250 MB/sec would disqualify them instantly, even with individual RAID controllers for each shelf. So my question is: Can I do the same thing I did with the IFT shelves, can I buy only 2501 JBOBDs and attach them directly to the server, thus *not* using the 2540 raid controller and still having access to the single drives? I'm quite nervous about this, because I'm not just talking about a single databases - I'd need a total number of 42 shelves and I'm pretty sure SUN doesn't offer Try&Buy deals at such a scale. -- Ralf Ramge Senior Solaris Administrator, SCNA, SCSA Tel. +49-721-91374-3963 [EMAIL PROTECTED] - http://web.de/ 1&1 Internet AG Brauerstraße 48 76135 Karlsruhe Amtsgericht Montabaur HRB 6484 Vorstand: Henning Ahlert, Ralph Dommermuth, Matthias Ehrlich, Andreas Gauger, Thomas Gottschlich, Matthias Greve, Robert Hoffmann, Markus Huhn, Norbert Lang, Achim Weiss Aufsichtsratsvorsitzender: Michael Scheeren _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
