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Posted to hdfs-dev@hadoop.apache.org by "chenrongwei (JIRA)" <ji...@apache.org> on 2016/12/30 04:02:58 UTC

[jira] [Created] (HDFS-11283) why should we not introduce distributed database to storage hdfs's metadata?

chenrongwei created HDFS-11283:
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             Summary: why should we not  introduce distributed database to storage hdfs's metadata?
                 Key: HDFS-11283
                 URL: https://issues.apache.org/jira/browse/HDFS-11283
             Project: Hadoop HDFS
          Issue Type: Wish
            Reporter: chenrongwei


why should we not  introduce distributed database to storage hdfs's metadata?
In my opinion,it maybe loss some performance,but it has below improvements:
1、enhance NN's extend ability,such as NN can support much more files and blocks. The problem of massive little files always make me headache.
2、In most MR cluster aren't care the performance loss,but more care the cluster's scale.
3、NN's HA implements maybe more simply and reasonable.




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