ONTAP Hardware

max-write-alloc-blocks and when to use it?

mdotten

Hi All,

 

I'm starting with a bit of a greenfield CDOT system, and have been reading up on some performance tweaks to put in ahead of time prior to this going production... things like zero-block dedupe, scheduling reallocates, etc

 

 

The one thing I need help with is I see a few documents telling me to change max-write-alloc-blocks to 256.

 

 

Is this a no-brainer change? or are there certain scenarios this could be a hindrance? 

 

This is going to be a dominantly MS-SQL cluster over iSCSI.

 

 

Thanks!!

Matt

1 REPLY 1

scottgelb

I haven't seen a SQL recommendation to modify the default.  There are some SAP docs recommending setting to 256 and Exchange to 512 for jetstress.  Do you have a support case open?  I wouldn't modify without a support recommendation since modifying is not listed in best practice documentation for SQL.

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