New storage features in vSphere 5.1

Posted by on August 28, 2012 in vCenter Server, vCloud, View, VMware, VMworld, vSphere, vStorage API | 0 comments

With the announcement of vSphere 5.1 at VMworld yesterday some more detailed information is becoming available around the new storage features included in vSphere 5.1.There are some really great stuff on this list that has not gotten much notice yet. I really like that many of these features are now supported in both View and vCloud director.

  1. VMFS file sharing limits – The previous limit for number of hosts that could share a single file was 8 for block storage, in 5.0 it was raised to 32 hosts for NFS datastores. In vSphere 5.1 the limit for block storage or VMFS datastore has been raised to 32 hosts also. This is compatible with both VMware View and vCloud director, the primary use for this is linked clones.
  2. VAAI updates – The use of VAAI NAS based snapshots for vCloud director is now available, this was previously available to only View in vSphere 5.0. This allows hardware based snapshots for faster provisioning of linked clones in both products.
  3. Larger MSCS clusters – The previous limit of 2 node MSCS clusters has been raised to allow for up to 5 node MSCS clusters with vSphere 5.1
  4. All Paths Down update – The timing out I/O on devices that enter into an APD state has been updated to address hostd from being tied up.
  5. Storage Protocol enhancements РThe ability to boot from software FCOE was added to vSphere 5.1.  Jumbo frame support has been added for all iSCSI adapters with UI support. Full support for 16Gb Fibre Channel HBA adapters that can run at full speed. In vSphere 5.0 16GB adapters could be used but had to run at 8Gb speeds.
  6. Storage IO control (SIOC) updates РSIOC will not figure out the best latency setting for your datastore as opposed to the manual setting in vSphere 5.0. By default SIOC is not turned in a Stats only mode so that it wont take any action but will be collecting stats for your before you configure  settings.
  7. Storage DRS (SDRS) enhancements – vCloud director can now use SDRS for initial placement of Fast provisioning linked clones for managing free space and IO utilization. This is an update from the previous free space method that vCloud 1.5 used and had no support for SDRS.
  8. Storage vMotion enhancements – Storage vMotion performs up to 4 parallel disk migrations per Storage vMotion operation.


About Brian Suhr

Brian is a VCDX5-DCV and a Sr. Tech Marketing Engineer at Nutanix and owner of this website. He is active in the VMware community and helps lead the Chicago VMUG group. Specializing in VDI and Cloud project designs. Awarded VMware vExpert status 6 years for 2016 - 2011. VCP3, VCP5, VCP5-Iaas, VCP-Cloud, VCAP-DTD, VCAP5-DCD, VCAP5-DCA, VCA-DT, VCP5-DT, Cisco UCS Design

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