[GitHub] [hadoop-ozone] supratimdeka opened a new pull request #107: HDDS-2301. Write path: Reduce read contention in rocksDB.

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supratimdeka opened a new pull request #107: HDDS-2301. Write path: Reduce read contention in rocksDB.
URL: https://github.com/apache/hadoop-ozone/pull/107
 
 
   https://issues.apache.org/jira/browse/HDDS-2301
   
   This change introduces 'mkdir -p' behaviour in these 2 OM Requests:
   1. create directory and 
   2. create (file)
   
   The idea is to avoid iteration of the key table when creating new files with a path. Without the patch,  during file create - checking the existence of each parent directory requires a slow DB iterator. With the patch, this check becomes a point lookup which can be accelerated by the bloom filters in RocksDB.
   
   This patch is a work-in-progress and the following functionality is broken:
   1. interoperability with S3
   2. ACLs (setting correct ACLs for the parent directories created in the path)
   3. rename
   
   Soliciting early feedback.
   

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