In RHGS 3.4.0, the cluster.lookup-optimize option will be turned on by default for all volumes. For existing volumes,any directories created after the upgrade will have lookup-optimize behaviour enabled. Existing directories will require a rebalance to be performed before they can use the lookup optimization. For new volumes, the lookup-optimize behaviour will be enabled by default except the root of the volume. Run a rebalance in order to enable lookup-optimize for the root of the volume.
*** Bug 1575868 has been marked as a duplicate of this bug. ***
here is the stage link for verification https://access.qa.redhat.com/documentation/en-us/red_hat_gluster_storage/3.4/html-single/administration_guide/
Looks Good. Changing status to Verified.