Categories
Performance Snapshots Storage Storage vMotion VMware vSphere

Snapshot Consolidation changes in vSphere 6.0

This is something I only learnt about very recently, and something I was unaware of. It seems that we have made a major improvement to the way we do snapshot consolidation in vSphere 6.0. Many of you will be aware of the fact that when they VM is very busy, snapshot consolidation may need to […]

Categories
Performance Snapshots Storage VMDK VMFS VMware vSphere

I/O Scheduler Queues Improvement for Virtual Machines

This is a new feature in vSphere 6.0 that I only recently became aware of. Prior to vSphere 6.0, all the I/Os from a given virtual machine to a particular device would share a single I/O queue. This would result in all the I/Os from the VM (boot VMDK, data VMDK, snapshot delta) queued into […]

Categories
iSCSI Storage VMFS VMware vSphere

Heads Up! Misbehaving APD functionality in vSphere 6.0

A very quick “public service announcement” post this morning folks, simply to bring your attention to a new knowledge base article that our support team have published. The issue relates to APD (All Paths Down) which is a condition that can occur when a storage device is removed from an ESXi host in an uncontrolled […]

Categories
vCenter Server VMware vSphere

fsck of vCenter Server Appliance 6.0 partitions

I hadn’t realized that we had now begun to use the LVM (Logical Volume Manager) in our vCenter Server Appliance (VCSA) version 6.0. Of course, I found out the hard way after a network outage in our lab brought down our VCSA which was running on NFS. On reboot, the VCSA complained about file system […]

Categories
Licensing Storage Storage vMotion VAAI VASA VMware VVols

VAAI now available with vSphere Standard Edition

A short post today, but it highlights what I feel is an important enhancement to vSphere licensing. I’ve had lots of questions recently about why VAAI (Storage APIs for Array Integration) is not available in the standard edition of vSphere. This is especially true since I began posting about Virtual Volumes earlier this year, and […]

Categories
VAAI VMware vSphere

vSphere 6.0 Storage Features Part 8: VAAI UNMAP changes

A few weeks, my good pal Cody Hosterman over at Pure Storage was experimenting with VAAI and discovered that he could successfully UNMAP blocks (reclaim) directly from a Guest OS in vSphere 6.0. VAAI are the vSphere APIs for Array Integration. Cody wrote about his findings here. Effectively, if you have deleted files within a […]

Categories
Performance Storage VAAI VMware vSphere

vSphere 6.0 Storage Features Part 7: VAAI XCOPY improvements

The more astute of you who have already moved to vSphere 6.0, and like looking at CLI outputs, may have observed some new columns/fields in the PSA claimrules when you run the following command: # esxcli storage core claimrule list –claimrule-class=VAAI The new fields are as follows (slide right to view full output): XCOPY Use […]