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25.6.17.3 The ndbinfo backup_id Table

This table provides a way to find the ID of the backup started most recently for this cluster.

The backup_id table contains a single column id, which corresponds to a backup ID taken using the ndb_mgm client START BACKUP command. This table contains a single row.

Example: Assume the following sequence of START BACKUP commands issued in the NDB management client, with no other backups taken since the cluster was first started:

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ndb_mgm> START BACKUP Waiting for completed, this may take several minutes Node 5: Backup 1 started from node 50 Node 5: Backup 1 started from node 50 completed StartGCP: 27894 StopGCP: 27897 #Records: 2057 #LogRecords: 0 Data: 51580 bytes Log: 0 bytes ndb_mgm> START BACKUP 5 Waiting for completed, this may take several minutes Node 5: Backup 5 started from node 50 Node 5: Backup 5 started from node 50 completed StartGCP: 27905 StopGCP: 27908 #Records: 2057 #LogRecords: 0 Data: 51580 bytes Log: 0 bytes ndb_mgm> START BACKUP Waiting for completed, this may take several minutes Node 5: Backup 6 started from node 50 Node 5: Backup 6 started from node 50 completed StartGCP: 27912 StopGCP: 27915 #Records: 2057 #LogRecords: 0 Data: 51580 bytes Log: 0 bytes ndb_mgm> START BACKUP 3 Connected to Management Server at: localhost:1186 (using cleartext) Waiting for completed, this may take several minutes Node 5: Backup 3 started from node 50 Node 5: Backup 3 started from node 50 completed StartGCP: 28149 StopGCP: 28152 #Records: 2057 #LogRecords: 0 Data: 51580 bytes Log: 0 bytes ndb_mgm>

After this, the backup_id table contains the single row shown here, using the mysql client:

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mysql> USE ndbinfo; Database changed mysql> SELECT * FROM backup_id; +------+ | id | +------+ | 3 | +------+ 1 row in set (0.00 sec)

If no backups can be found, the table contains a single row with 0 as the id value.