Hbase Master Backup

Snapshots

HBase snapshots are fully functional, feature rich, and require no cluster downtime during their creation.

http://hbase.apache.org/book/ops.snapshots.html https://blog.cloudera.com/blog/2013/03/introduction-to-apache-hbase-snapshots/ http://docs.hortonworks.com/HDPDocuments/HDP2/HDP-2.1.3-Win/bk_user-guide/content/user-guide-hbase-snapshots.html

The exportSnapshot command provide offsite backup of the data. It duplicate a table’s data into the local HDFS cluster or a remote HDFS cluster.

Replication

HBase provides a replication mechanism to copy data between HBase clusters. It can be used as a disaster recovery solution and as a mechanism for high availability.

Replication has three modes: master->slave, master<->master, and cyclic. You can also use replication to separate web-facing operations from back-end jobs such as MapReduce. It is for example possible to collect data into multiple clusters and replicate the data into all the running HBase clusters. In case of failure, client can choose an alternate location.

Replication is asynchronous, allowing clusters to be geographically distant or to have some gaps in availability. Eventual consistency it guarantees that, if no additional updates are made to a given data item, all reads to that item will eventually return the same value.

http://hbase.apache.org/book.html#cluster_replication

Export

hbase.apache.org/book/ops_mgt.html#export

CopyTable

http://hbase.apache.org/book/ops_mgt.html#copytable http://blog.cloudera.com/blog/2012/06/online-hbase-backups-with-copytable-2/ https://blog.safaribooksonline.com/2013/06/18/backing-up-and-restoring-data-on-a-live-hbase-cluster/

ZooKeeper Dump

Accessible from MasterUI https://master1.ryba:60010/zk.jsp