Class ExpiredMobFileCleaner

java.lang.Object
org.apache.hadoop.conf.Configured
org.apache.hadoop.hbase.mob.ExpiredMobFileCleaner
All Implemented Interfaces:
org.apache.hadoop.conf.Configurable, org.apache.hadoop.util.Tool

@Private public class ExpiredMobFileCleaner extends org.apache.hadoop.conf.Configured implements org.apache.hadoop.util.Tool
The cleaner to delete the expired MOB files.
  • Field Details

    • LOG

      private static final org.slf4j.Logger LOG
  • Constructor Details

  • Method Details

    • cleanExpiredMobFiles

      Cleans the MOB files when they're expired and their min versions are 0. If the latest timestamp of Cells in a MOB file is older than the TTL in the column family, it's regarded as expired. This cleaner deletes them. At a time T0, the cells in a mob file M0 are expired. If a user starts a scan before T0, those mob cells are visible, this scan still runs after T0. At that time T1, this mob file M0 is expired, meanwhile a cleaner starts, the M0 is archived and can be read in the archive directory.
      Parameters:
      tableName - The current table name.
      family - The current family.
      Throws:
      IOException
    • main

      public static void main(String[] args) throws Exception
      Throws:
      Exception
    • printUsage

      private void printUsage()
    • run

      public int run(String[] args) throws Exception
      Specified by:
      run in interface org.apache.hadoop.util.Tool
      Throws:
      Exception