The arrow of time

Ivan Voras' blog

Nicer things in life - VMWare 4, ZFS, virtual hot-plugs

Sometimes, when things go right, they are really beautiful to watch. Like adding a virtual (SCSI) drive to a running virtual machine freshly copied from ESXi 3.5 to vSphere 4, seeing that drive simply appear in the guest system in a hot-plug fashion, creating a ZFS pool on it and watching iostat as data is migrated from the old drive which has gotten to be too small (and uses UFS), to the new one on which the magic of ZFS will allow the file system to grow indefinitely (as the damn application is greedy in a stupid way), and seeing that "pausing" problems ZFS caused on ESXi 3.5 really are solved in 4.

Things are looking fine...


(p.s. it's a good thing ZFS is finally a file system that can make full use of SCSI tags (aka NCQ)... and even nicer that they are fully supported in the above combination throughout the whole stack)

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