Day2 after the 8.1RC2 upgrade - All quiet on the (disabled) dedup front - will need to engage the lead engineers on this one since we like the dedup savings, but not the 100's of VMs starving for IO.
After a major upgrade, ONTAP usually runs a background job to upgrade the WAFL filesystem. Maybe that is what caused your load problems. Presumably that has finished, so perhaps you can enable dedupe again.
Last night (first since the upgrade from 7.3.5.1P2 to 8.1RC2) we experienced much higher load on our 3270 cluster and some VM timeouts coinciding with our dedup schedule (11pm -2am)
Anyone heard if dedup changed in 8.1?
I am disabling the regular dedup schedule until this is sorted out
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thanks
Fletcher
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Steve Losen scl@virginia.edu phone: 434-924-0640
University of Virginia ITC Unix Support