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January 9th, 2012 15:00
ACOFW and VMAX enginuity 5875
I would like to know if TF/Snap Async copy on first write (ACOFW) is supported for thin devices on a VMAX with 5875 code and how is performance impacted if both the source and target (VDEVs) are written to simultaneously.
I am trying to move away from a clone to a snap design if ACOFW can provide good performance without a COFW penalty for my nightly batch job - both the source STD dev and target (VDEV) would be written to simultaneously.
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sauravrohilla
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January 11th, 2012 08:00
Hi Ashish,
Iits supported from 5773 Q1,10 release and higher (5875 ofcourse).. Also if I am right, ACOFW is only for writes on source device. If you are writing to target devices, it will still use sync COFW and pay COFW penalty..
regards,
Saurabh Rohilla
ashish2009
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January 12th, 2012 14:00
Thanks for the answer Saurabh, I have logged a case with EMC to get a definite answer about ACOFW
sauravrohilla
859 Posts
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January 12th, 2012 17:00
Thats the right thing you did... do post the suggestions u get from support.
regards,
Saurabh