Network Hardware User Manual

U3585-J-Z125-8-76 289
SM2 reports PFA CONTROLLER report
PREFETCH LENGTH Information on the prefetching strategy (only supported for 3419/21)
CTL MN Mnemonic name of the controller or of the CONTROL DEVICE
(3419/21)
#DEV Number of disk devices supported by the cache
SEC NR Cache sector number on this controller (3419/21 only)
SIZE Size of the cache sector in this controller in MB (3419/21 only)
READ Number of read operations to hiperfiles (in I/Os per second)
RD HIT Percentage of hits in the total number of read operations to hiper-
files
WRITE Total number of write operations (in the case of 3860, the number of
fast write operations) to hiperfiles (in I/Os per second)
WR HIT Percentage of fast write operations in the total number of write
operations to hiperfiles
OVERRUNS Number of unsuccessful attempts to use the cache due to overload
(per second)
Note
The PFA controller screens are output in the order in which the caches occur in the PFA
CACHE report.
If PFA serves the cache via DAB and the DAB monitoring program is activated, DAB
monitored data will be supplied in addition to PFA monitored data. If PFA serves the
caches of 3419/21 controllers via PCA and the PCA monitoring program is activated,
PCA monitored data will be supplied.
NONE: No prefetching
LOW: A small number of blocks are prefetched
HIGH: A large number of blocks are prefetched