[dm-devel] DM-MP, Xen 5.0.0 and NetApp
Rodrigo Nascimento
nascimento.rp at gmail.com
Wed Apr 1 14:31:07 UTC 2009
Hi All,
I'm having problems to put the Multipathing tools to work correctly with
NetApp Cluster Solution.
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.
*XenServer multipath.conf*
defaults {
user_friendly_names no
}
devices {
device {
vendor "NETAPP"
product "LUN"
path_grouping_policy group_by_prio
getuid_callout "/sbin/scsi_id -g -u -s /block/%n"
prio_callout "/sbin/mpath_prio_netapp /dev/%n"
features "1 queue_if_no_path"
path_checker directio
failback immediate
}
}
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.
*Lun Stats from the Storage Controller*
Read Write Other QFull Read Write Average Queue Partner Lun
Ops Ops Ops kB kB Latency Length Ops kB
0 0 0 0 0 0 0.00 0.00 0 0
/vol/vol_cmprh01/cmprh01_disk01.lun
---
0 0 0 0 0 0 0.00 0.00 0 0
/vol/vol_cmprh01/cmprh01_disk01.lun
---
0 0 0 0 0 0 0.00 0.00 0 0
/vol/vol_cmprh01/cmprh01_disk01.lun
---
10 0 41 0 5 0 0.37 5.04 23 3
/vol/vol_cmprh01/cmprh01_disk01.lun
---
0 0 0 0 0 0 0.00 0.00 0 0
/vol/vol_cmprh01/cmprh01_disk01.lun
---
0 0 0 0 0 0 0.00 0.00 0 0
/vol/vol_cmprh01/cmprh01_disk01.lun
---
0 0 0 0 0 0 0.00 0.00 0 0
/vol/vol_cmprh01/cmprh01_disk01.lun
---
0 0 0 0 0 0 0.00 0.00 0 0
/vol/vol_cmprh01/cmprh01_disk01.lun
---
7 0 10 0 3 0 0.52 5.01 5 1
/vol/vol_cmprh01/cmprh01_disk01.lun
---
7 0 11 0 28 0 0.44 0.08 6 12
/vol/vol_cmprh01/cmprh01_disk01.lun
---
0 0 0 0 0 0 0.00 0.00 0 0
/vol/vol_cmprh01/cmprh01_disk01.lun
When we have an I/O operation, more than 50% arrives to the storage
controller by the Partner interface.
*igroup configuration*
NETAPP314001> igroup show -v
xenpool_ntap01 (FCP):
OS Type: linux
Member: 50:01:43:80:03:b9:36:f8 (logged in on: vtic, 0c, 0a)
Member: 50:01:43:80:03:b9:36:fa (logged in on: 0d, 0b, vtic)
Member: 50:01:43:80:03:b9:36:d8 (logged in on: 0c, 0a, vtic)
Member: 50:01:43:80:03:b9:36:da (logged in on: 0d, 0b, vtic)
Member: 50:01:43:80:03:b9:36:d4 (logged in on: 0c, 0a, vtic)
Member: 50:01:43:80:03:b9:36:d6 (logged in on: 0d, 0b, vtic)
Member: 50:01:43:80:03:b9:37:54 (logged in on: 0c, 0a, vtic)
Member: 50:01:43:80:03:b9:37:56 (logged in on: 0d, 0b, vtic)
Member: 50:01:43:80:03:b9:37:58 (logged in on: 0c, 0a, vtic)
Member: 50:01:43:80:03:b9:37:5a (logged in on: 0d, 0b, vtic)
Member: 50:01:43:80:03:b9:37:10 (logged in on: 0c, 0a, vtic)
Member: 50:01:43:80:03:b9:37:12 (logged in on: 0d, 0b, vtic)
Member: 50:01:43:80:03:b9:37:20 (logged in on: 0c, 0a, vtic)
Member: 50:01:43:80:03:b9:37:22 (logged in on: 0d, 0b, vtic)
Member: 50:01:43:80:03:b9:37:0c (logged in on: vtic, 0c, 0a)
Member: 50:01:43:80:03:b9:37:0e (logged in on: 0d, 0b, vtic)
Member: 50:01:43:80:03:b9:79:b8 (logged in on: 0c, 0a, vtic)
Member: 50:01:43:80:03:b9:79:ba (logged in on: 0d, 0b, vtic)
Member: 50:01:43:80:03:b9:35:54 (logged in on: vtic, 0c, 0a)
Member: 50:01:43:80:03:b9:35:56 (logged in on: 0d, 0b, vtic)
Member: 50:01:43:80:03:ba:0c:c8 (logged in on: vtic, 0c, 0a)
Member: 50:01:43:80:03:ba:0c:ca (logged in on: 0d, 0b, vtic)
Member: 50:01:43:80:03:b9:35:50 (logged in on: 0c, 0a, vtic)
Member: 50:01:43:80:03:b9:35:52 (logged in on: 0d, 0b, vtic)
Member: 50:01:43:80:03:ba:0c:d0 (logged in on: vtic, 0c, 0a)
Member: 50:01:43:80:03:ba:0c:d2 (logged in on: 0d, 0b, vtic)
Member: 50:01:43:80:03:b9:79:5c (logged in on: 0c, 0a, vtic)
Member: 50:01:43:80:03:b9:79:5e (logged in on: 0d, 0b, vtic)
Member: 50:01:43:80:03:ba:0c:dc (logged in on: 0c, 0a, vtic)
Member: 50:01:43:80:03:ba:0c:de (logged in on: 0d, 0b, vtic)
Member: 50:01:43:80:03:b9:35:28 (logged in on: vtic, 0c, 0a)
Member: 50:01:43:80:03:b9:35:2a (logged in on: 0d, 0b, vtic)
ALUA: Yes
The ALUA was configured at the igroup.
We made another test putting a Windows machine with NetApp DSM(Multipathing
software) and everything works fine.
Anyone could help me?
Rgds,
--
Rodrigo Nascimento
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