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Date: Fri, 30 Dec 2016 04:02:58 +0000 (UTC)
From: "chenrongwei (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
Message-ID: <JIRA.13031201.1483070567000.617109.1483070578447@Atlassian.JIRA>
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Subject: [jira] [Created] (HDFS-11283) why should we not  introduce
 distributed database to storage hdfs's metadata?
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archived-at: Fri, 30 Dec 2016 04:03:01 -0000

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 metadat=
a?
In my opinion,it maybe loss some performance,but it has below improvements:
1=E3=80=81enhance NN's extend ability,such as NN can support much more file=
s and blocks. The problem of massive little files always make me headache.
2=E3=80=81In most MR cluster aren't care the performance loss,but more care=
 the cluster's scale.
3=E3=80=81NN's HA implements maybe more simply and reasonable.


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