On Nov 20, 2007 1:48 AM, Louwtjie Burger <[EMAIL PROTECTED]> wrote: > > > > That is still 256MB/s . I am getting about 194MB/s > > No, I don't think you can take 2Gbit / 8bits per byte and say 256MB is > what you should get... > Someone with far more FC knowledge can comment here. There must be > some overhead in transporting data (as with regular SCSI) ... in the > same way ULTRA 320MB SCSI never yields close to 320 MB/s ... even > though it might seem so. > > > Adding a second loop by adding another non active port I may have to > > rebuild the > > FS, no? > > No. Use MPXio to help you out here ... Solaris will see the same LUN's > on each of the 2,3 or 4 ports on the primary controller ... but with > multi-pathing switched on will only give you 1 vhci LUN to work with. > > What I would do is export the zpool(s). Hook up more links to the > primary and enable scsi_vhci. Reboot and look for the new cX vhci > devices. > > zpool import should rebuilt the pools from the multipath devices just fine. > > Interesting test though. > > > I am gettin 194MB/s. Hmm my 490 has 16G memory. I really I could benefit > > some > > from OS and controller RAM, atleast for Oracle IO > > Close to 200MB seems good from 1 x 2Gb.
Should I not gain a lot (I am not getting any) of performance gain with 2 x 2GB RAM on my raid controllers NVRAM? > > Something else to try ... when creating hardware LUNs, one can assign > the LUN to either controller A or B (as preferred or owner). By doing > assignments one can use the secondary controller ... you are going to > then "stripe" over controllers .. as one way of looking at it. > > PS: Is this a direct connection? Switched fabric? > -- Asif Iqbal PGP Key: 0xE62693C5 KeyServer: pgp.mit.edu _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
