Anyone Used Veritas Hostbased Mirroring on EVA LUNs?

[Alzhy]

Those that are using Veritas Volume Manager (VxVM) on HP-UX 11.x, what's the performance of mirroring (with or without FlashSnap)compared to array based mirroring?

For one, I know VxVM mirroring is faster than LVM MirrorDisk/UX since one can have several simultaneous mirror processes going on as oppposed to just one with LVM.

I am interested in the performance of hostbased mirroring since our current solution (array based mirroring/snapclones) seem to have a huge performance impact not only during the synching process but during the "undoing" of these "snaps/mirrors'.

We are currently successfully doing this on Solaris 8/VxVM and Hitachi Arrays -- wherein we use Veritas Mirroring, and submit anywhere from 4-8 simultaneous "mirror resynchs" during the night/post-batch window. In the morning, we detach and move the LUNs to the backup server where it is backed up or to a DSS server for further batch processing. When done, we move the disk back to the prod server for another cycle.

Doing this on the HP-UX, "snapclone" environment (I will not name the array) -- once we're done with backups and DSS, our disk team "undo" the snapclones in preparation for another snapclone ... the undo process itself takes a couple of hours and is impacting the other servers connected to the array.. Same thing during the snapclone process... whereas the veritas approach does not entail any undo as the LUNS are peremanetly allocated...