Enable read reallocation on a volume?

dtapper — Wed, 04 Jun 2025 18:12:08 GMT

Hi,

We're having some read latency issues on a particular volume in our environment. We can see both random- and sequential reads on the particular volume. Block size also seems to be bigger than on our other NFS datastores in our environment.

I have enabled read reallocation with the space-optimized option on the volume. Question: Do I also need to run a manually reallocation on the volume or will the volume start the reallocation in the background? Reallocate show doesn't show anything, only "This table is currently empty".

Environment:

Ontap 8.3.1

VMware vSphere 6

NFS datastore, VMDK

BR,

David T

Re: Enable read reallocation on a volume?

asulliva — Tue, 22 Nov 2016 20:32:15 GMT

Hello @dtapper,

ONTAP will automatically move sequentially read data into a more optimized layout. You do not need to run a manual reallocate of the volume specifically for the read reallocation feature.

Andrew

topic Enable read reallocation on a volume? in ONTAP Discussions

Enable read reallocation on a volume?

Re: Enable read reallocation on a volume?