Method Detail

• writeCompactionMarker

  public static long writeCompactionMarker(WAL wal,
                           HTableDescriptor htd,
                           HRegionInfo hri,
                           org.apache.hadoop.hbase.protobuf.generated.WALProtos.CompactionDescriptor c,
                           MultiVersionConcurrencyControl mvcc)
                                    throws IOException

  Write the marker that a compaction has succeeded and is about to be committed. This provides info to the HMaster to allow it to recover the compaction if this regionserver dies in the middle (This part is not yet implemented). It also prevents the compaction from finishing if this regionserver has already lost its lease on the log.

  Parameters:

  mvcc - Used by WAL to get sequence Id for the waledit.

  Throws:

  IOException

• writeFlushMarker

  public static long writeFlushMarker(WAL wal,
                      HTableDescriptor htd,
                      HRegionInfo hri,
                      org.apache.hadoop.hbase.protobuf.generated.WALProtos.FlushDescriptor f,
                      boolean sync,
                      MultiVersionConcurrencyControl mvcc)
                               throws IOException

  Write a flush marker indicating a start / abort or a complete of a region flush

  Throws:

  IOException

• writeRegionEventMarker

  public static long writeRegionEventMarker(WAL wal,
                            HTableDescriptor htd,
                            HRegionInfo hri,
                            org.apache.hadoop.hbase.protobuf.generated.WALProtos.RegionEventDescriptor r,
                            MultiVersionConcurrencyControl mvcc)
                                     throws IOException

  Write a region open marker indicating that the region is opened

  Throws:

  IOException

• writeBulkLoadMarkerAndSync

  public static long writeBulkLoadMarkerAndSync(WAL wal,
                                HTableDescriptor htd,
                                HRegionInfo hri,
                                org.apache.hadoop.hbase.protobuf.generated.WALProtos.BulkLoadDescriptor desc,
                                MultiVersionConcurrencyControl mvcc)
                                         throws IOException

  Write a log marker that a bulk load has succeeded and is about to be committed.

  Parameters:

  wal - The log to write into.

  htd - A description of the table that we are bulk loading into.

  hri - A description of the region in the table that we are bulk loading into.

  desc - A protocol buffers based description of the client's bulk loading request

  Returns:

  txid of this transaction or if nothing to do, the last txid

  Throws:

  IOException - We will throw an IOException if we can not append to the HLog.