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. ***
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