SSD for log and cache how BIG?

[chalan]

if i have 2x4TB zfsradi1 and want to log/cache on separate SSD to speed up the system how BIG should i buy? and which one do you prefer?

 

[wolfgang]

Hi,

see
https://pthree.org/2012/12/06/zfs-administration-part-iii-the-zfs-intent-log/
https://pthree.org/2012/12/07/zfs-administration-part-iv-the-adjustable-replacement-cache/

SSD used as zil are sync write only storage so you need enterprise class write incentive storage.