Package org.apache.hadoop.hdfs.shortcircuit.ShortCircuitShm

Examples of org.apache.hadoop.hdfs.shortcircuit.ShortCircuitShm.ShmId

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   */
  public NewShmInfo createNewMemorySegment(String clientName,
      DomainSocket sock) throws IOException {
    NewShmInfo info = null;
    RegisteredShm shm = null;
    ShmId shmId = null;
    synchronized (this) {
      if (!enabled) {
        if (LOG.isTraceEnabled()) {
          LOG.trace("createNewMemorySegment: ShortCircuitRegistry is " +
              "not enabled.");
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        LOG.trace(this + " can't register a slot because the " +
            "ShortCircuitRegistry is not enabled.");
      }
      throw new UnsupportedOperationException();
    }
    ShmId shmId = slotId.getShmId();
    RegisteredShm shm = segments.get(shmId);
    if (shm == null) {
      throw new InvalidRequestException("there is no shared memory segment " +
          "registered with shmId " + shmId);
    }
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        LOG.trace("unregisterSlot: ShortCircuitRegistry is " +
            "not enabled.");
      }
      throw new UnsupportedOperationException();
    }
    ShmId shmId = slotId.getShmId();
    RegisteredShm shm = segments.get(shmId);
    if (shm == null) {
      throw new InvalidRequestException("there is no shared memory segment " +
          "registered with shmId " + shmId);
    }
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      if (notFull.isEmpty()) {
        return null;
      }
      Entry<ShmId, DfsClientShm> entry = notFull.firstEntry();
      DfsClientShm shm = entry.getValue();
      ShmId shmId = shm.getShmId();
      Slot slot = shm.allocAndRegisterSlot(blockId);
      if (shm.isFull()) {
        if (LOG.isTraceEnabled()) {
          LOG.trace(this + ": pulled the last slot " + slot.getSlotIdx() +
              " out of " + shm);
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            LOG.trace(this + ": freeing empty stale " + shm);
          }
          shm.free();
        }
      } else {
        ShmId shmId = shm.getShmId();
        full.remove(shmId); // The shm can't be full if we just freed a slot.
        if (shm.isEmpty()) {
          notFull.remove(shmId);
 
          // If the shared memory segment is now empty, we call shutdown(2) on
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    return new SlotId(PBHelper.convert(slotId.getShmId()),
        slotId.getSlotIdx());
  }

  public static ShmId convert(ShortCircuitShmIdProto shmId) {
    return new ShmId(shmId.getHi(), shmId.getLo());
  }
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Related Classes of org.apache.hadoop.hdfs.shortcircuit.ShortCircuitShm.ShmId

  • org.apache.hadoop.hdfs.protocolPB.PBHelper
  • org.apache.hadoop.hdfs.server.datanode.ShortCircuitRegistry
  • org.apache.hadoop.hdfs.shortcircuit.DfsClientShmManager$EndpointShmManager
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