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Subject [GitHub] [incubator-hudi] nbalajee opened a new pull request #1233: [HUDI-335] Improvements to DiskBasedMap used by ExternalSpillableMap,…
Date Thu, 16 Jan 2020 00:15:04 GMT
nbalajee opened a new pull request #1233: [HUDI-335] Improvements to DiskBasedMap used by ExternalSpillableMap,…
URL: https://github.com/apache/incubator-hudi/pull/1233
 
 
   [HUDI-335] Improvements to DiskBasedMap used by ExternalSpillableMap, for write and random/sequential
read paths, by introducing bufferedRandmomAccessFile
   
   ## What is the purpose of the pull request
   DiskBasedMap is used by ExternalSpillableMap for writing (K,V) pair to a file,
   keeping the (K, fileMetadata) in memory, to reduce the foot print of the record on disk.
   
   This change improves the performance of the record get/read (random read/sequential read)
and put/write operations from/to disk, by introducing a data buffer/cache.
   
   ## Brief change log
   Using BufferedRandomAccessFile instead of RandomAccessFile, in read path.
   Using BufferedOutputStream in the write path.
   
   ## Verify this pull request
   This pull request is covered by existing tests, such as TestDiskBasedMap:testSimpleInsert
   
   
   ## Committer checklist
   
    - [ x] Has a corresponding JIRA in PR title & commit
    
    - [x ] Commit message is descriptive of the change
    
    - [ x] CI is green
   
    - [ ] Necessary doc changes done or have another open PR
          
    - [ ] For large changes, please consider breaking it into sub-tasks under an umbrella
JIRA.

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