Chen Liang created HDFS-11154:
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Summary: Block Storage : store server state to persistent storage
Key: HDFS-11154
URL: https://issues.apache.org/jira/browse/HDFS-11154
Project: Hadoop HDFS
Issue Type: Sub-task
Reporter: Chen Liang
Assignee: Chen Liang
Currently, all the storage state are kept in server memory. If server crashes,
we would lose all the volume information. This JIRA stores server internal
state into its local disk. Such that on server failure, we can simply restart
server and restore volume information from disk.
More specifically, the internal state written to disk is mainly the mapping
from volume to its underlying containers, plus some meta information such as
volume size, block size, etc.
Note that this is only a simple, minimum set mechanism for persistence. It is
more like a counterpart of fsimage in HDFS, but without edit logs.
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