<div><font face="verdana,sans-serif">Hi All,</font></div>
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<div><font face="verdana,sans-serif">I'm having problems to put the Multipathing tools to work correctly with NetApp Cluster Solution.</font></div>
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<div><font face="verdana,sans-serif">I have a xenpool with 3 machines the multipathing are enabled on them, the HBA are Qlogic, two FAS3140 controllers in Cluster. I created a lun to be a storage repository (SR), the lun is visible and was recognized on the 3 machines, but when we say to the XenServer to build a SR with this Lun, all I/O operations arrive to the FAS3140 by the non-optimized path.</font></div>
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<div><font face="verdana,sans-serif"><strong>XenServer multipath.conf</strong></font></div>
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<div><font face="courier new,monospace">defaults {<br> user_friendly_names no<br>}<br></font></div>
<div><font face="courier new,monospace">devices {</font></div>
<div><font face="courier new,monospace"> device {<br> vendor "NETAPP"<br> product "LUN"<br> path_grouping_policy group_by_prio<br>
getuid_callout "/sbin/scsi_id -g -u -s /block/%n"<br> prio_callout "/sbin/mpath_prio_netapp /dev/%n"<br> features "1 queue_if_no_path"<br>
path_checker directio<br> failback immediate<br> }</font></div>
<div><font face="courier new,monospace">}</font></div>
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<div><font face="verdana,sans-serif">We made two tests, one with prio_callout as /sbin/mpath_prio_alua and other with prio_callout as /sbin/mpath_prio_netapp, both returns the same results.</font></div>
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<div><font face="verdana,sans-serif"><strong>Lun Stats from the Storage Controller</strong></font></div>
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<div><font face="verdana,sans-serif"><font face="courier new,monospace"> Read Write Other QFull Read Write Average Queue Partner Lun<br> Ops Ops Ops kB kB Latency Length Ops kB<br> 0 0 0 0 0 0 0.00 0.00 0 0 /vol/vol_cmprh01/cmprh01_disk01.lun<br>
---<br> 0 0 0 0 0 0 0.00 0.00 0 0 /vol/vol_cmprh01/cmprh01_disk01.lun<br>---<br> 0 0 0 0 0 0 0.00 0.00 0 0 /vol/vol_cmprh01/cmprh01_disk01.lun<br>
---<br> 10 0 41 0 5 0 0.37 5.04 23 3 /vol/vol_cmprh01/cmprh01_disk01.lun<br>---<br> 0 0 0 0 0 0 0.00 0.00 0 0 /vol/vol_cmprh01/cmprh01_disk01.lun<br>
---<br> 0 0 0 0 0 0 0.00 0.00 0 0 /vol/vol_cmprh01/cmprh01_disk01.lun<br>---<br> 0 0 0 0 0 0 0.00 0.00 0 0 /vol/vol_cmprh01/cmprh01_disk01.lun<br>
---<br> 0 0 0 0 0 0 0.00 0.00 0 0 /vol/vol_cmprh01/cmprh01_disk01.lun<br>---<br> 7 0 10 0 3 0 0.52 5.01 5 1 /vol/vol_cmprh01/cmprh01_disk01.lun<br>
---<br> 7 0 11 0 28 0 0.44 0.08 6 12 /vol/vol_cmprh01/cmprh01_disk01.lun<br>---<br> 0 0 0 0 0 0 0.00 0.00 0 0 /vol/vol_cmprh01/cmprh01_disk01.lun</font><br>
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<div><font face="Verdana">When we have an I/O operation, more than 50% arrives to the storage controller by the Partner interface.</font></div>
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<div><font face="verdana,sans-serif"><strong>igroup configuration</strong></font></div>
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<div><font face="courier new,monospace">NETAPP314001> igroup show -v<br> xenpool_ntap01 (FCP):<br> OS Type: linux<br> Member: 50:01:43:80:03:b9:36:f8 (logged in on: vtic, 0c, 0a)<br> Member: 50:01:43:80:03:b9:36:fa (logged in on: 0d, 0b, vtic)<br>
Member: 50:01:43:80:03:b9:36:d8 (logged in on: 0c, 0a, vtic)<br> Member: 50:01:43:80:03:b9:36:da (logged in on: 0d, 0b, vtic)<br> Member: 50:01:43:80:03:b9:36:d4 (logged in on: 0c, 0a, vtic)<br> Member: 50:01:43:80:03:b9:36:d6 (logged in on: 0d, 0b, vtic)<br>
Member: 50:01:43:80:03:b9:37:54 (logged in on: 0c, 0a, vtic)<br> Member: 50:01:43:80:03:b9:37:56 (logged in on: 0d, 0b, vtic)<br> Member: 50:01:43:80:03:b9:37:58 (logged in on: 0c, 0a, vtic)<br> Member: 50:01:43:80:03:b9:37:5a (logged in on: 0d, 0b, vtic)<br>
Member: 50:01:43:80:03:b9:37:10 (logged in on: 0c, 0a, vtic)<br> Member: 50:01:43:80:03:b9:37:12 (logged in on: 0d, 0b, vtic)<br> Member: 50:01:43:80:03:b9:37:20 (logged in on: 0c, 0a, vtic)<br> Member: 50:01:43:80:03:b9:37:22 (logged in on: 0d, 0b, vtic)<br>
Member: 50:01:43:80:03:b9:37:0c (logged in on: vtic, 0c, 0a)<br> Member: 50:01:43:80:03:b9:37:0e (logged in on: 0d, 0b, vtic)<br> Member: 50:01:43:80:03:b9:79:b8 (logged in on: 0c, 0a, vtic)<br> Member: 50:01:43:80:03:b9:79:ba (logged in on: 0d, 0b, vtic)<br>
Member: 50:01:43:80:03:b9:35:54 (logged in on: vtic, 0c, 0a)<br> Member: 50:01:43:80:03:b9:35:56 (logged in on: 0d, 0b, vtic)<br> Member: 50:01:43:80:03:ba:0c:c8 (logged in on: vtic, 0c, 0a)<br> Member: 50:01:43:80:03:ba:0c:ca (logged in on: 0d, 0b, vtic)<br>
Member: 50:01:43:80:03:b9:35:50 (logged in on: 0c, 0a, vtic)<br> Member: 50:01:43:80:03:b9:35:52 (logged in on: 0d, 0b, vtic)<br> Member: 50:01:43:80:03:ba:0c:d0 (logged in on: vtic, 0c, 0a)<br> Member: 50:01:43:80:03:ba:0c:d2 (logged in on: 0d, 0b, vtic)<br>
Member: 50:01:43:80:03:b9:79:5c (logged in on: 0c, 0a, vtic)<br> Member: 50:01:43:80:03:b9:79:5e (logged in on: 0d, 0b, vtic)<br> Member: 50:01:43:80:03:ba:0c:dc (logged in on: 0c, 0a, vtic)<br> Member: 50:01:43:80:03:ba:0c:de (logged in on: 0d, 0b, vtic)<br>
Member: 50:01:43:80:03:b9:35:28 (logged in on: vtic, 0c, 0a)<br> Member: 50:01:43:80:03:b9:35:2a (logged in on: 0d, 0b, vtic)<br> ALUA: Yes</font></div>
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<div><font face="verdana,sans-serif">The ALUA was configured at the igroup.</font></div>
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<div><font face="verdana,sans-serif">We made another test putting a Windows machine with NetApp DSM(Multipathing software) and everything works fine.</font></div>
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<div><font face="Verdana">Anyone could help me?</font></div>
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<div><font face="Verdana">Rgds,</font></div>
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<div><font face="verdana,sans-serif"><font face="verdana,sans-serif">-- <br></font>Rodrigo Nascimento<br></font></div>