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Forum Discussion
Poor performance of 4200 on XenServer 5.60
Hardware: Two IBM xSeries servers with dual Xeon Quad-Core processors and 64GB RAM each ReadyNAS 4200 12TB Model (no 10G ethernet): LACP bonding of both 1 gig ports GS724TR gigabit switch with la...
Just an update to this thread. Since drives 1-4 and 5-12 are on different controllers (on the 4200), Netgear Level3 support and I re-built the entire unit after copying the data to a new "temp" 4200.
We ultimately did two things for the best performance with multiple VM's:
1) Setup three RAID 10 volumes: Disks 1-4, 5-8, and 9-12. Created one NFS share for each volume and distributed the VM's across those three NFS shares.
2) Used NFS vs iSCSI (slightly less overhead) and changed thread count to 6.
This alone made an enormous difference. I believe the write penalty using XRAID2 before (RAID 6) really hurt the overall performance, and we just didn't see this unit shine until this reconfiguration.
We ultimately did two things for the best performance with multiple VM's:
1) Setup three RAID 10 volumes: Disks 1-4, 5-8, and 9-12. Created one NFS share for each volume and distributed the VM's across those three NFS shares.
2) Used NFS vs iSCSI (slightly less overhead) and changed thread count to 6.
This alone made an enormous difference. I believe the write penalty using XRAID2 before (RAID 6) really hurt the overall performance, and we just didn't see this unit shine until this reconfiguration.
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