3.7.0 HP StorageWorks HP Scalable NAS File Serving Software administration guide - HP Scalable NAS 3.7 for Linux (AG513-96002, October 2009)

Membership partition timeout
The membership partition timeout should be increased to 120 seconds (120000ms).
The timeout is specified in the mxinit.conf file, which is located in the /etc/
opt/hpcfs directory. Locate the following line in the file:
# sanpulse_start_options = { “--mxinit” };
Change the line as follows:
# sanpulse_start_options = { “mxinit”, “-o sdmp_io_timeout=120000” };
PSFS/psd timeout
This timeout affects the psd devices that make up the abstracted block layer to PSFS
filesystems. Increase the timeout to 180 seconds. The timeout is set in the scl.conf
file, which is located in the /etc/opt/hpcfs directory.
Locate the following line in the file:
#psd_timeout 90
Remove the comment character (#) at the beginning of the line and set the psd_timeout
value to 180:
psd_timeout 180
Restart the nodes
After changing the timeouts on all nodes, stop and restart HP Scalable NAS on each
node. The stop/restart can be performed on one node at a time.
Caveat: Increasing the timeouts allows the array to complete its data rebalancing
operations. However, the performance of the running cluster will be impacted. For
example, if an I/O of a 4K block takes one minute, it is possible that all users will
be serialized behind this cluster-wide blocking I/O. This is more likely when creating
files than with a read-only workload. For this reason, HP recommends that you
insert/replace new drives at times of lower user workload.
After the storage capacity upgrade
When the disk upgrade is complete, restore the original mxinit.conf and
scl.conf files. After this changes are made on all nodes, stop and restart HP
Scalable NAS on each node. The stop/restart can be performed on one node at a
time.
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