IBM High Performance Storage System HPSS Installation Manual page 93

values may need to be overridden in env.conf.
Key SM Environment Variables
Variable
HPSS_SM_SRV_CONNECT_FAIL_COUNT
HPSS_SM_SRV_CONNECT_INTERVAL_MI
N
HPSS_SM_SRV_CONNECT_INTERVAL_MA
X
HPSS_SM_SRV_MONITOR_THREADS
HPSS_SM_SRV_QUEUE_SIZE
HPSS_SM_SRV_TPOOL_SIZE
HPSS Installation Guide
Release 6.2 (Revision 2.0)
Default
Value
Connection Fail Count: number of
connection failures to a server before the
3 Max Connection Interval takes affect (*)
Interval between attempting server
connections when Connection Fail
Count has not yet been reached
20 (seconds) (*)
Max Connection Interval: interval
between server connections when
Connection Fail Count has been reached
without a successful connection
60 (seconds) (*)
Number of threads created to monitor
5 server connections
Request Queue Size used by the System
Manager server interface - default of 5
slots in the server interface request
queue to be used when the server
interface thread pool is completely full.
The queue is used to hold RPC requests
from servers until a thread is available to
process the request.
Note that if the request queue has any
entries in it, it means that all the threads
in the server thread pool are busy and
the SM response will be degraded. If
this happens then it would be good to
increase the number of threads available
to the server interface using the
HPSS_SM_SRV_TPOOL_SIZE
variable. Increasing the size of the
5 queue will not help with performance.
Thread Pool Size used by the System
Manager server interface. If the Thread
Pool is exhausted then server RPC
requests will be queued in the server
RPC Request Queue to wait for a thread
to become available. When the thread
pool is exhausted SM performance may
be degraded. Increase this value if that is
the case. Typically 1 thread per HPSS
server should be adequate. But a few
100 extra wouldn't hurt.
July 2008
Functionality
93