3.7.0 HP StorageWorks HP Scalable NAS File Serving Software command reference guide HP Scalable NAS for Linux (AG513-96003, October 2009)

NOTE:
The administrative filesystem is preconfigured on HP StorageWorks 4400 Scalable
NAS systems.
IMPORTANT:
Do not use psfssuspend to suspend the administrative filesystem. Doing this can
cause issues with the cluster.
Determine the size for the administrative filesystem
The minimum size for the administrative filesystem is 10GB; however HP recommends
that the filesystem be at least 50GB. If the replication feature is used, you may need
to create a larger filesystem. Use the following formula to determine the space required
for replication.
S = ((4KB * C) * (N+1)) * B
The variables in the formula are as follows:
Space needed for replicationS
Average number of unique changes per replication interval per nodeC
Number of nodes in the clusterN
Backlog; the number of replication intervals (≥1) that replication is behindB
For example, if there is no backlog (B=1) and 1000 files change per node per interval
on a 16-node cluster, the formula would be:
S = (4KB * 1000) * 17 = 68000KB = 68MB
If 100,000 files changed, the size would be 6.8GB. Similarly, if 750,000 files
changed, the size would be 51GB.
Add 1GB to the total if the Performance Dashboard will be used and 1GB if the mxfs
reply cache will be configured on the administrative filesystem.
HP Scalable NAS File Serving Software command reference guide 99