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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...
Not as far as I know. EXT3/4 is just inferior when it comes to running virtualization datastores on.
I've installed several of their ReadyDATA 5200 units since then (Running Nexenta's version of ZFS), with configurations consisting of SATA,SAS, and SSD drives. These units blow away the 4200's for close to the same cost.
The ReadyDATA's are much faster, more capable units with online drive-shelf expansion, unlimited "zero performance cost" snapshots, and built-in block replication/dedupe. ZFS itself (Oracle originally created) is an almost identical file system to NetApp's WAFL... where they both are RoW (Redirect on Write) vs file systems like EXT that are of CoW (Copy of Write) nature. NetApp does have an advantage that their dedupe can be run asynchronously, vs ZFS being real-time. I don't run ZFS dedupe on VMware / XenServer datastores, but if you have enough write-cache SSD's attached to the RAID groups, you can potentially alleviate the ZFS dedupe penalty altogether.
Probably a more lengthy answer than you were expecting, but hope it helps.
I've installed several of their ReadyDATA 5200 units since then (Running Nexenta's version of ZFS), with configurations consisting of SATA,SAS, and SSD drives. These units blow away the 4200's for close to the same cost.
The ReadyDATA's are much faster, more capable units with online drive-shelf expansion, unlimited "zero performance cost" snapshots, and built-in block replication/dedupe. ZFS itself (Oracle originally created) is an almost identical file system to NetApp's WAFL... where they both are RoW (Redirect on Write) vs file systems like EXT that are of CoW (Copy of Write) nature. NetApp does have an advantage that their dedupe can be run asynchronously, vs ZFS being real-time. I don't run ZFS dedupe on VMware / XenServer datastores, but if you have enough write-cache SSD's attached to the RAID groups, you can potentially alleviate the ZFS dedupe penalty altogether.
Probably a more lengthy answer than you were expecting, but hope it helps.
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