Details
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New Feature
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Status: Closed
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Major
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Resolution: Duplicate
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None
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Description
There is planning to add region count and table count quota mentioned in HBASE-8410. However, it's also quite useful to control the requesting throughput inside the region server. For example, we don't want a data dumping task affecting the online services and it's better to enforce the throughput quota inside HBase. Another common scenario is multi-tenancy, i.e. a cluster is shared by multiple applications.
The following rules will be supported:
1. per user quota
limits the total read/write throughput initiated by a single user on any table.
2. per (user, table) quota
limits the total read/write throughput initiated by a single user on a specified table.
The implementation will use coprocessor to intercept and check each request on each region. And each region server allocate a portion of quota from the total specified quota (for that user or user + table) based on the portion of active regions (the whole cluster or the specified table) assigned on that region server. The request will be rejected or delayed if the limit is reached.