Database 版 (精华区)
发信人: thank (飞云), 信区: Database
标 题: 关于DB2的LOAD(5)
发信站: 紫 丁 香 (Thu Oct 8 20:34:48 1998), 转信
Since regular logging is not performed, LOAD uses pending states to
preserve consistency of the database. The Load and Build phases of
the LOAD process place any associated table spaces into a load pending
state. The Delete phase of the LOAD process places any associated table
spaces into a delete pending state. If you complete the LOAD process
but you do not have either logretain or userexit "on"; and, you have
not specified the COPY YES option nor the NONRECOVERABLE option,
then any associated table spaces are placed in a backup pending state.
These states can be checked by using the LIST TABLESPACES command.
(For more information on LIST TABLESPACES, see the Command Reference
manual.) One last possible state associated with the LOAD process is
concerned with referential and check constraints. Dependent tables may
be placed in a check pending state following the completion of the
LOAD process.
LOAD can also be used with a non-recoverable option. This allows you
to perform a non-recoverable LOAD without affecting the recoverability
of all other tables in the database. When this type of LOAD is run,
there is no requirement for either using the COPY YES option or having
a backup taken.
If a LOAD fails, the table space(s) involved could be in an
inconsistent state because there is no logging. For this reason,
the table spaces are left in a load pending state. To remove the
load pending state, you will have to restart the LOAD, perform a
LOAD REPLACE on the same table on which the LOAD failed, or recover
the table space(s) using a RESTORE with the most recent backup (either
table space or database backup) and then carry out further recovery
actions. (You could also drop the table space and then re-create it.)
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