Not really, the problem is the active-standby nature of asymmetric arrays (Sun 6140). Rather than having both controllers accepting IOs, one controller accepts IOs (active) while the other sits idle (standby).
However, as a result of a suggestion on this maillist, I connected both HBAs to a single controller and got IOs from both HBAs accepted by a single controller with subsequent performance boost. The EquaLogic that I mentioned in my initial inquiry on this maillist was symmetric (active-active). -----Original Message----- From: Torrey McMahon [mailto:[EMAIL PROTECTED] Sent: Monday, October 15, 2007 9:14 PM To: Lion, Oren-P64304 Cc: [email protected] Subject: Re: [storage-discuss] Only primary MPxIO channel gets IOs It looks like you only have one active path to the storage which is correct if you've only direct connected to the array. I'm going to guess that when you tested with Linux you used more then one LUN. Oren Lion wrote: > Hi, > > I was surprised to observe only the primary MPxIO channel getting IOs (see below iostat for fp0) while my expectation was to see IOs distributed (round-robin) on both paths, fp0 and fp1, with higher throughput than IOs only on single channel. > > As a sanity check to compare against iostat I ran Qlogic's SANsurfer GUI tool to observe HBA performance, sure enough, only a single HBA was servicing IO requests. > > Running a similar test on Linux against an EqualLogic array I observed multipath sending IOs down multiple channels. > > Is my expectation with Solaris x86 MPxIO valid? > > Config: > V40z 8-core, 16 GB RAM, latest Recommended Patch (uname -a returns > patch level 127112-01) 2x Sun StroageTek PCI-X (QLogic) 4Gb Single > Port HBA Sun 6140, 4GB cache, 16x 15K RPM drives, RAID 10 > > snippet /var/adm/messages > Oct 12 11:13:26 z8 genunix: [ID 834635 kern.info] > /scsi_vhci/[EMAIL PROTECTED] (sd19) multipath > status: degraded, path /[EMAIL PROTECTED],0/pci1022,[EMAIL > PROTECTED]/pci1077,[EMAIL PROTECTED]/[EMAIL PROTECTED],0 > (fp1) to target address: w201400a0b82a3946,0 is standby Load > balancing: round-robin Oct 12 11:13:26 z8 genunix: [ID 834635 > kern.info] /scsi_vhci/[EMAIL PROTECTED] (sd19) > multipath status: optimal, path > /[EMAIL PROTECTED],0/pci1022,[EMAIL PROTECTED]/pci1077,[EMAIL > PROTECTED]/[EMAIL PROTECTED],0 (fp0) to target address: > w201500a0b82a3946,0 is online Load balancing: round-robin > > iostat -X 2 > > extended device statistics > device r/s w/s kr/s kw/s wait actv svc_t %w %b > sd3 0.0 77.5 0.0 51193.6 0.0 1.0 12.5 0 76 > sd4 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 > sd5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 > sd6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 > sd19 58.5 0.0 50681.6 0.0 0.0 0.7 12.0 0 70 > sd19.fp1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 > sd19.fp0 58.5 0.0 50681.6 0.0 0.0 0.0 0.0 0 0 > ses16.fp1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 > ses17.fp0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 > extended device statistics > device r/s w/s kr/s kw/s wait actv svc_t %w %b > sd3 0.0 56.0 0.0 51204.8 0.0 0.7 12.4 0 69 > sd4 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 > sd5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 > sd6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 > sd19 59.0 0.0 51204.8 0.0 0.0 0.7 11.8 0 69 > sd19.fp1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 > sd19.fp0 59.0 0.0 51204.9 0.0 0.0 0.0 0.0 0 0 > ses16.fp1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 > ses17.fp0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 > > > This message posted from opensolaris.org > _______________________________________________ > storage-discuss mailing list > [email protected] > http://mail.opensolaris.org/mailman/listinfo/storage-discuss > > _______________________________________________ storage-discuss mailing list [email protected] http://mail.opensolaris.org/mailman/listinfo/storage-discuss
