Inline. J-D On Thu, Jun 17, 2010 at 2:12 AM, 梁景明 <[email protected]> wrote: > Something confused me for a long time. > 1、how to recover hbase master?
The master doesn't have anything to recover. You can start as many masters as you want, one will be the active and the rest will just be waiting for the active to die and take its place. The important content when a cluster is live is all in ZooKeeper. > 2、how to recover hbase region server? The data is all in HDFS, you can lose up to 2 nodes at the same time and yon won't lose data. Then its all up to Hadoop. > as hadoop ,there is checkpoint mirror to recover the hadoop master. As I said, there's nothing to backup for the master. > and now i only know to backup tables and restore them. To backup tables to can currently distcp the content of the hbase root directory. See http://hadoop.apache.org/common/docs/r0.20.2/distcp.html. There are other solutions, this mailing list is full of them. Also coming is https://issues.apache.org/jira/browse/HBASE-50 > one way to rescue hbase is to reinstall habse and create tables again . > it cant write to shell or something ,all the stuff by manually. > > thanks for any help . >
