ONTAP Discussions

Flexgroup aggregate best practice

STEVEWILLSQ

As per Tr-4571 best practice for a FAS based flexgroup is 2 aggregates per node.

 

What would be the conequences of adding a 3rd aggregate per node.

 

Environment

6 node FAS8200 cluster 3x DS460C shelves per pair loaded with 10TB drives

ONTAP 9.7P5

2 data aggregates per node ~288TB per aggr

Aggregates are 42x 10TB drives 12 drive RAID-TEC raid groups.

4 member volumes per aggr, ~68TB

 

so far so comforming to the Tr

 

Single flexgroup spans the cluster and is approaching 95% full

 

Customer has additional shelves available and would like to expand the flexgroup.

Adding an aggregate breaks the 2 per node best practice rule

Adding a raid group breaks the 400TB aggr size limit

 

So without adding nodes what would the implications be of adding a 3rd aggregate per node.  I'm loath to break best practice

1 ACCEPTED SOLUTION

parisi

No real consequence. The best practice is based on the number of aggregate affinities available in ONTAP; there are only two aggregate affinities per node. Adding a third aggregate doesn't add more affinities so no perf gain. You do get capacity gains however.

View solution in original post

2 REPLIES 2

parisi

No real consequence. The best practice is based on the number of aggregate affinities available in ONTAP; there are only two aggregate affinities per node. Adding a third aggregate doesn't add more affinities so no perf gain. You do get capacity gains however.

View solution in original post

STEVEWILLSQ

great to know,  thanks for the responding so quickly!

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