Hi,
I would like to know what is the best practices and your expirience on setting and how to configure (NVMe) flash cache card to work on a flash pool aggregate.
Some facts about the platform:
Ontap 9.1p13
FAS9000 with NVMe card (caching currently disabled)
two sata aggregates both of them are fabric pools
the application hosted on those aggregates is mail application with 95% read and 5% write workload
One KB articel about enabling flash cache on a flash pool aggregate states this command:
clusthershell> node run <node_name>
nodeshell> options flexscale.flash_pool_caching on
another sources says enable it like this:
system node external-cache modify -is-hya-enabled true
Does it matter which command to use? Are they doing both the same = enable flash cache on flash pool aggregates?
And there are a couple other caching options like mbuf-inserts, pcs-size, rewarm
Which setting for a flash cache/flash pool combination works best?
The current configuration looks like this:
netapp::*> system node external-cache show -node netapp-*
Node enabled rewarm mbuf-inserts pcs-size hya-caching
---------- ------- ------ ------------ -------- -----------
netapp-01 true true true 4096 false
netapp-02 true true true 4096 false
netapp-03 true false true 894 false
netapp-04 true false true 894 false
netapp-05 true false true 894 false
netapp-06 true false true 894 false
netapp-07 true false true 894 false
netapp-08 true false true 894 false
netapp-09 true false true 894 false
netapp-10 true false true 894 false
netapp-11 true false true 894 false
netapp-12 true false true 894 false
12 entries were displayed.
Highly appriciate any input, so far I only got feedback "it depends" and unfortunately that option is not available 😉
Thanks
Alex
