备份策略选择
------------

下表给出了各种备份策略的比较。



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   * - 
     - gpfdist
     - hdfs
     - pg_dump
     - Raw Data Backupv
   * - Parallel
     - Yes
     - Yes, Dynamic
     - No
     - No
   * - Incremental Backup
     - No
     - Yes
     - No
     - Yes
   * - Backup Location
     - Local FS
     - Hdfs FS
     - Local FS
     - Local FS, HDFS
   * - Format
     - Text, CSV
     - Text, CSV
     - Text, Tar, Custom
     - Depends on format of row data
   * - Compression
     - No
     - No
     - Yes
     - Only support custom format
   * - Scalability
     - Good
     - Very Good
     - —
     - Good
   * - Performance
     - Fast loading, Fast unloading
     - Fast loading, Fast unloading
     - -
     - Fast (Just file copy)