Dell EMC Series Server Sizing Manual page 24

Testing and validation
Dell EMC Storage with ISS SecurOS Sizing Guide
24
The following code makes the group changes to the cluster that reduce the
interruption from 30 seconds to 1minute to 9 seconds or less. The changes affect
the "lazy queue" and other cache related operations on each node.
These changes are required to modify the remove or add node interruption:
declare -i COUNT MDS
BASE=10000
COUNT=$((1.01 * $BASE))
MDS=$(($BASE * 0.75))
isi_sysctl_cluster kern.maxvnodes=$BASE
isi_sysctl_cluster kern.minvnodes=$BASE
isi_sysctl_cluster efs.lin.lock.initiator.lazy_queue_goal=$COUNT
isi_sysctl_cluster efs.ref.initiator.lazy_queue_goal=$COUNT
isi_sysctl_cluster efs.mds.block_lock.initiator.lazy_queue_goal=
$MDS
isi_sysctl_cluster efs.bam.datalock.initiator.lazy_queue_goal=
$MDS
WARNING
If running a mixed workload, these changes can adversely affect the other
workloads that might be present on the cluster.