Table Rebuild is a utility that repairs data corruption. It does so by rebuilding tables on a specific AMP vproc based on data located on the other AMP vprocs in the fallback cluster.
Table Rebuild can rebuild data in the following subsets:
- The primary or fallback portion of a table
- An entire table (both primary and fallback portions)
- All tables in a database
- All tables that reside on an AMP vproc
- Table Rebuild performs differently based on the type of table (for example, fallback or not).
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Type of Table
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Action
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Fallback Tables
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Delete the table header (one row table which defines a user data table)
Delete specified portion of the table being rebuilt
Rebuild the table header
Rebuild the specified portion of the table
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Non-fallback Tables
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Delete the table header.
Rebuild the table header.
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Permanent Journal Tables
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Delete data for the table being rebuilt.
Rebuild the table header.
Locks the table pending rebuild.
Note: You must restore non-fallback data.
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Note: You can start REBUILD when the failed AMP has been fixed and brought back to the OFFLINE state
