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Finding the replica with the most advanced replication index (#1072)

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Thomas Schroeter 2018-06-26 11:07:16 +01:00 committed by GitHub
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docs/source/running-a-notary-cluster/operating-percona.rst
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@ -117,10 +117,12 @@ When all nodes of the cluster are down, manual intervention is needed to bring
the cluster back up. On the node with the most advanced replication index, the cluster back up. On the node with the most advanced replication index,
``set safe_to_bootstrap: 1`` in the file ``grastate.dat`` in the data directory. ``set safe_to_bootstrap: 1`` in the file ``grastate.dat`` in the data directory.
You can use ``SHOW GLOBAL STATUS LIKE 'wsrep_last_committed';`` to find out the You can use ``SHOW GLOBAL STATUS LIKE 'wsrep_last_committed';`` to find out the
sequence number of the last committed transaction. Start the first node using sequence number of the last committed transaction. Or, if MySQL is down, use
``mysqld_safe --wsrep-recover``. This command prints the recovered position.
Once you have found the most advanced node, start that node using
``/etc/init.d/mysql bootstrap-pxc``. Bring back one node at a time and watch ``/etc/init.d/mysql bootstrap-pxc``. Bring back one node at a time and watch
the logs. If a SST is required, the first node can only the logs. If a SST is required, the first node can only serve as a donor for
serve as a donor for one node a time. one node a time.
See the documentation of the safe to bootstrap feature. Similar to restoring See the documentation of the safe to bootstrap feature. Similar to restoring
from backup, restarting the entire cluster is an operation that deserves from backup, restarting the entire cluster is an operation that deserves