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52 DB2 Manager User Guide
StorageTek Proprietary
the status of the internal scheduler queue lock and the length of the
scheduler queue, in message OTD20062.
In addition, message OTD20063 will be displayed for each reader, writer and
scheduler task in the system, giving the following details:
Status - this field indicates the current status of the identified task. It
can take the following values:
NULL - the task has never been initialized. It is not
available for object recall.
WAIT - the task is currently waiting for work. For tape
reader tasks, no tape volume is currently allocated.
WTRT - a tape reader task is currently waiting for work, and
the last tape volume accessed by the task is still
allocated.
WTSH - a termination request has been made for a waiting
task.
BUSY - the task is currently busy performing object
retrieval. For tape reader tasks, the task type will
indicate whether the tape volume being processed
will be retained on the drive after all outstanding
requests have been completed, or whether the tape
will be de-allocated and dismounted.
BYSH - the task is currently busy performing object
retrieval, but will terminate when all queued
requests have been completed.
TERM - a terminated task. A task may be terminated either
explicitly by operator command, or implicitly via a
reduction in the system MAXTRDR, MAXDRDR,
MAXTWTR and MAXSCHED settings. It may be
restarted by increasing the value of MAXTRDR,
MAXDRDR, MAXTWTR or MAXSCHED. A
terminated task is not available for object recall or
storage.
Qlen - this gives the number of requests queued for processing by
this task. All requests will be for retrieval of objects from the
tape or disk dataset currently being processed by this task.
The queue length will be non-zero for tasks with status =
BUSY. For waiting tasks, this value will always be zero.
For busy tasks and waiting tape reader tasks with tape volume still allocated,
message OTD20063 may also contain the following information:
DBID - this gives the 4-character identifier of the Archive Manager
database currently being processed.
Stg level - identifies the Archive Manager database storage level (in
range 0-7) containing the object currently being processed.