Collocation settings
After you define a storage pool, you can change the collocation setting by updating the storage pool. The change in collocation for the pool does not affect files that are already stored in the pool.
For example, if collocation is off for a storage pool and you turn it on, from then on client
files that are stored in the pool are collocated. Files that were previously stored in the storage
pool are not moved to collocate them. As volumes are reclaimed or restored, the data in the pool
tends to become more collocated. You can also use the MOVE DATA or MOVE
NODEDATA commands to move data to new volumes to increase collocation. Moving data to new
volumes causes an increase in the processing time and the volume mount activity.
Tip: A
mount wait can occur or take longer than usual when collocation by file space is enabled and a node
has a volume that contains multiple file spaces. If a volume is eligible to receive data, IBM
Storage Protect waits for that volume.