ALTERNATE—Recover to an Alternate VSAM File

The ALTERNATE keyword recovers a tablespace or index to an alternate VSAM file.
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The ALTERNATE keyword recovers a tablespace or index to an alternate VSAM file. If you specify ALTERNATE YES, the object is available during the recovery processing.
If a tablespace is in check pending status and the SORTLOG YES parameter was
not
used, you cannot recover the index using ALTERNATE YES. You can only recover the index using ALTERNATE NO. The index is unavailable during the recovery process.
Specify ALTERNATE YES with each TABLESPACE keyword in your syntax. ALTERNATE YES does not support concurrent copies.
If the indexes are recovered separately from the tablespace, the tablespace can prevent the recovery from completing because it is quiesced.
This keyword has the following format:
ALTERNATE [
NO
|YES]
  • NO
    Does not recover to an alternate VSAM file. The object is unavailable during the recovery process. The recovery does not use any temporary target VSAM data sets. This value is the default.
  • YES
    Recovers the object to an alternate VSAM file. The object is available in READ ONLY mode during the recovery, except for a short time at the beginning and end of the recovery, while data set renaming takes place.
    The recovered object is written to a new VSAM data set, which is renamed according to the specified RENAME-CONTROL value.