Oren, You are seeing expected behavior, which is dependent on the type of the array. The 6140 is a ASYMMETRIC array with ACTIVE-STANDBY configuration. The STANDBY path (will become ACTIVE and accept IOs) only when the current ACTIVE path is down.
I'm not sure about the model of the Equallogic array, but based on the behavior, I guess the array is a SYMMETRIC device. The symmetric device uses an ACTIVE-ACTIVE configuration where the IOs are accepted on both the channels. If you hook up the Equallogic array to Solaris (and the 6140 to Linus, if Linux supports it) you should see the same array dependent behavior. Let us know if you get a chance. /Ramana I believe the Equallogic array is > 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
