Hi All,
We have just completed a "Copy Free" transition from 7-mode to C-dot onTap 9.0 using the 7 mode Transition Tool (7MTT) . We did the Copy Free transition by moving the shelves from a FAS3220 to a FAS8040.
The upgrade went well, but on completion, our home drives volume (18TB/50million files), is seeing huge snapshot deltas up to 10 times the size they were before. As a result they are rapidly filling up the volume. The Filer generates these changes at certain points during the day. We can see the snapshot suddenly surge in size from a few hundred MB to over ~200GB in just an hour. Its definitely a Filer process, as it is happening once or twice every day, and no users have quotas of more than 10GB. In fact most users aren't here due to the Xmas holidays.
There is no storage efficiency enabled on this volume, so we know this isn't the cause, and the volume belongs to an SVM, in case that is relevant.
We have a case open with support, via our support partner, but we've not had any response yet, and given this is our primary Home Drives volume, and these huge snapshots are happening every day, we are very quickly going to be in a sticky situation.
I'm just wondering if anyone has seen anything like this, or can give us some clues on where to look.
I ran a wafl scan status whilst the problem was happening, but there was nothing showing there.
The only other thing that was identified from our Autosupports as a possible cause was something called an L2I scan, but neither we, not our support partner know what this is.
Many TIA
Mark