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  1. HBase
  2. HBASE-25099

Change meta replica count by altering meta table descriptor

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      Now you can change the region replication config for meta table by altering meta table.
      The old "hbase.meta.replica.count" is deprecated and will be removed in 4.0.0. But if it is set, we will still honor it, which means, when master restart, if we find out that the value of 'hbase.meta.replica.count' is different with the region replication config of meta table, we will schedule an alter table operation to change the region replication config to the value you configured for 'hbase.meta.replica.count'.
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      Now you can change the region replication config for meta table by altering meta table. The old "hbase.meta.replica.count" is deprecated and will be removed in 4.0.0. But if it is set, we will still honor it, which means, when master restart, if we find out that the value of 'hbase.meta.replica.count' is different with the region replication config of meta table, we will schedule an alter table operation to change the region replication config to the value you configured for 'hbase.meta.replica.count'.

    Description

      As now we support altering meta table, it will be better to also deal with changing meta replica number using altering meta, i.e, we could unify the logic in MasterMetaBootstrap to ModifyTableProcedure, and another benefit is that we do not need to restart master when changing the replica number for meta.

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          is related to

          Task - A task that needs to be done. HBASE-23055 Alter hbase:meta

          • Major - Major loss of function.
          • Resolved
          relates to

          Bug - A problem which impairs or prevents the functions of the product. HBASE-25216 The client zk syncer should deal with meta replica count change

          • Major - Major loss of function.
          • Resolved

          New Feature - A new feature of the product, which has yet to be developed. HBASE-18070 Enable memstore replication for meta replica

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed
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              zhangduo Duo Zhang
              zhangduo Duo Zhang
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