本文整理汇总了Java中org.apache.hadoop.hdfs.protocol.HdfsConstants.SMALL_BUFFER_SIZE属性的典型用法代码示例。如果您正苦于以下问题：Java HdfsConstants.SMALL_BUFFER_SIZE属性的具体用法？Java HdfsConstants.SMALL_BUFFER_SIZE怎么用？Java HdfsConstants.SMALL_BUFFER_SIZE使用的例子？那么, 这里精选的属性代码示例或许可以为您提供帮助。您也可以进一步了解该属性所在类org.apache.hadoop.hdfs.protocol.HdfsConstants的用法示例。
在下文中一共展示了HdfsConstants.SMALL_BUFFER_SIZE属性的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: inferChecksumTypeByReading
/**
* Infer the checksum type for a replica by sending an OP_READ_BLOCK
* for the first byte of that replica. This is used for compatibility
* with older HDFS versions which did not include the checksum type in
* OpBlockChecksumResponseProto.
*
* @param lb the located block
* @param dn the connected datanode
* @return the inferred checksum type
* @throws IOException if an error occurs
*/
private Type inferChecksumTypeByReading(LocatedBlock lb, DatanodeInfo dn)
throws IOException {
IOStreamPair pair = connectToDN(dn, dfsClientConf.socketTimeout, lb);
try {
DataOutputStream out = new DataOutputStream(new BufferedOutputStream(pair.out,
HdfsConstants.SMALL_BUFFER_SIZE));
DataInputStream in = new DataInputStream(pair.in);
new Sender(out).readBlock(lb.getBlock(), lb.getBlockToken(), clientName,
0, 1, true, CachingStrategy.newDefaultStrategy());
final BlockOpResponseProto reply =
BlockOpResponseProto.parseFrom(PBHelper.vintPrefixed(in));
String logInfo = "trying to read " + lb.getBlock() + " from datanode " + dn;
DataTransferProtoUtil.checkBlockOpStatus(reply, logInfo);
return PBHelper.convert(reply.getReadOpChecksumInfo().getChecksum().getType());
} finally {
IOUtils.cleanup(null, pair.in, pair.out);
}
}