Vinay created HDFS-5463:
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Summary: NameNode should limit to number of blocks per file
Key: HDFS-5463
URL: https://issues.apache.org/jira/browse/HDFS-5463
Project: Hadoop HDFS
Issue Type: Bug
Reporter: Vinay
Assignee: Vinay
Currently there is no limit to number of blocks user can write to a file.
And blocksize also can be set to minimum possible.
User can write any number of blocks continously, which may create problems in
NameNodes performance and service as the number of blocks of file increases.
Because each time new block allocated, all blocks of the file will be
persisted, and this can cause serious performance degradation
So proposal is to limit the number of maximum blocks a user can write to a file.
May be 1024 blocks(if 128*MB is block size then 128 GB can be max file size)
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