We noticed some performance issues on one of our Netapp Filers
and during my investigation I noticed a few things that happen
under the covers and I wanted to share them with you.
Netapp SnapMirror is an asynchronous method of mirroring files from one location to another. At my company we use it to replicate property images from one datacentre to another. I've always wondered what happens to the replica as SnapMirror is a block copy though obviously the destination may be different therefore it needs to do something 'smart' to correct the differences between the two filers.
The 'smart'ness is what is causing performance …