hdfs - Does HBase call hsync on WAL with SyncFlag.UPDATE_LENGTH option? -


currently wal flush section empty in reference guide. how hbase sync wal file after each write?

  • normal hsync() without notifying namenode change in size of wal
  • or using hsync(enumset.of(syncflag.update_length))

does matter notify namenode wal size changed after each append?


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