Fujitsu Siemens Computers CentricStor V3.1D, User Manual

Page: 287 / 640

U41117-J-Z125-7-76
287
Global Status History data
number of parallel requests to VLM (REORG)
Number of “Move Requests” to be processed simultaneously which the PLM sends
to the VLM for the purpose of reorganizing PVs. The higher this value, the more
resources are reserved by the reorganization.
cancel time for REORG
If a move request issued by the PLM to the VLM remains in an unchanged status
beyond this time it is canceled by the PLM. This does not apply for a PV reorgani-
zation started by an operator command.
estimated MB/s
estimated overhead for 1 write job
With the “estimated MB/s” and “estimated overhead for 1 write job” parameters the
PLM selects the physical volume which it can release in the shortest time in the
event of a reorganization. MB/s specifies the estimated write performance of the
write drive, “Write Overhead” the estimated overhead per volume to be written.
refresh interval
Threshold value in days. If the first write job for a PV was executed before more than
the specified value, the PV will be reorganized in the time range specified in
“timeframe”.
write size per PDS
number of write jobs per PDS
These two parameters control the number of drives to be used for write jobs.
–
write size:
Maximum write data volume per drive.
– number of write jobs
Maximum number of write jobs per drive.
The drive assignment is determined from the maximum value ascertained from the
two values. The number of drives used for save requests is defined by the PLM
according to the following formula:
n = int (max ((Write_data_volume/WriteWatermark_1), (Number_of_write_jobs/
WriteWatermark_2)) +1)
n = 0 if no write jobs are present.