Special vdev (fusion pool) for zvols

BabaJega

Dabbler
Joined
Sep 2, 2017
Messages
15
Will there be any kind of performance benefit on using a special vdev for metadata caching on a pool that solely hosts zvols presented to a hyper-v cluster via iscsi?

Can the special_small_blocks parameter be used to make zfs store blocks from those zvols on the special vdev? For example: the blocksize of the zvol is set to 32k while the special_small_blocks is set to 64k. Shouldnt all the blocks of that zvol go straight to the special vdev?

Maybe Im mixing things up here. I would be happy if someone could explain if this can work or not (and maybe why because I would like to know more).
 

Chris Moore

Hall of Famer
Joined
May 2, 2015
Messages
10,080
Did you ever get any answers on this?
 
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