Re: Throughput drops with VMware GFS2 cluster when using fence_scsi

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



<Responding to myself for benefit of the list>

This looks like it was caused by the device mapping defaulting to a
round-robin path selection policy.  While I couldn't find any mention
of it in the RedHat cluster documentation, I did see some MSCS
postings[1] that said:

Round Robin can interfere with applications that use SCSI reservations
for sharing LUNs among VMs and thus is not supported with the use of
LUNs with MSCS.

so I changed the policy to "Most Recently Used" and was able to get
sustained writes of 40MB/s and sustained reads of 100MB/s down one
NIC.

  Regards,
    Greg

[1] http://en.community.dell.com/techcenter/storage/w/wiki/2671.aspx

--
Linux-cluster mailing list
Linux-cluster@xxxxxxxxxx
https://www.redhat.com/mailman/listinfo/linux-cluster



[Index of Archives]     [Corosync Cluster Engine]     [GFS]     [Linux Virtualization]     [Centos Virtualization]     [Centos]     [Linux RAID]     [Fedora Users]     [Fedora SELinux]     [Big List of Linux Books]     [Yosemite Camping]

  Powered by Linux