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HAWQConfigurationParameterReference.html
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<h3 class="title-container">HAWQ Configuration Parameter Reference</h3>
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<div id ="main"><div style="visibility:hidden; height:2px;">Pivotal Product Documentation : HAWQ Configuration Parameter Reference</div><div class="wiki-content group" id="main-content">
<p>Describes the configuration in the path $HAWQ_install_path/etc/hdfs-client.xml.</p><p align="LEFT" style="margin-left: 30.0px;"><span style="font-size: medium;"> <span style="font-size: medium;"> </span> </span></p><div class="table-wrap"><table class="confluenceTable"><tbody style="margin-left: 30.0px;"><tr style="margin-left: 30.0px;"><td class="highlight-green confluenceTd" data-highlight-colour="green" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">Parameter</p></td><td class="highlight-green confluenceTd" data-highlight-colour="green" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">Description</p></td><td class="highlight-green confluenceTd" data-highlight-colour="green" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">Default value</p></td><td class="highlight-green confluenceTd" data-highlight-colour="green" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">Comments</p></td></tr><tr style="margin-left: 30.0px;"><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">ipc.client.connection.maxidletime</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">The idle timeout interval of a rpc channel, rpc channel will exit if timeout occurs.</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">10000 (ms) </p></td><td class="confluenceTd"> </td></tr><tr style="margin-left: 30.0px;"><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">ipc.client.connect.max.retries</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">The max retry times when a rpc channel failed to connect to the server for any reason except timeout.</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">1</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT"> </p></td></tr><tr style="margin-left: 30.0px;"><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">ipc.client.connect.max.retries</p><p align="LEFT"> </p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">The max retry times when a rpc channel failed to connect to the server for any reason except timeout.</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">1</p><p align="LEFT"> </p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT"> </p></td></tr><tr style="margin-left: 30.0px;"><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">ipc.client.connect.max.retries.on.timeouts</p><p align="LEFT"> </p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">The max retry times when a rpc channel failed to connect to the server since timeout.</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">1</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT"> </p><p align="LEFT"> </p></td></tr><tr style="margin-left: 30.0px;"><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">ipc.client.connect.timeout</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">The timeout interval for a rpc channel to connect to the server.</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">10000 (ms)</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT"> </p></td></tr><tr style="margin-left: 30.0px;"><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">ipc.client.write.timeout</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">The timeout interval for a rpc channel to write data into socket </p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">10000 (ms)</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT"> </p></td></tr><tr style="margin-left: 30.0px;"><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">ipc.client.tcpnodela </p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">To set rpc channel to tcpnodelay mode</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">true </p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT"> </p></td></tr><tr style="margin-left: 30.0px;"><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">dfs.ConfigKey.type</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">Default checksum type, valid value is: CRC32, CRC32C, NULL</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">CRC32C </p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">Must be set to the same value as the HDFS side.</p></td></tr><tr style="margin-left: 30.0px;"><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">dfs.bytes-per-ConfigKey</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">The size of chunk to calculate checksum.</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">512</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT"> </p></td></tr><tr style="margin-left: 30.0px;"><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">dfs.datanode.rpc.timeout</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">The timeout interval to the client to wait for the datanode to finish a rpc call.</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">3</p></td><td class="confluenceTd"> </td></tr><tr style="margin-left: 30.0px;"><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">dfs.namenode.rpc.timeout</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">The timeout interval to the client to wait for the namenode to finish a rpc call.</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">3600000</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT"> </p></td></tr><tr style="margin-left: 30.0px;"><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">dfs.client-write-packet-size</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">The packet size for the output stream.</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">65536</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT"> </p></td></tr><tr style="margin-left: 30.0px;"><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">dfs.client.block.write.retries </p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">The packet size for the output stream.</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">3 </p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT"> </p></td></tr><tr style="margin-left: 30.0px;"><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">dfs.client.close.file.timeout</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">The timeout interval to the output stream to wait for close file operation completion.</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">3600000 (ms)</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT"> </p></td></tr><tr style="margin-left: 30.0px;"><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">dfs.client.block.write.timeout</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">Time of timeout interval to the output stream to write data into socket.</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">3600000 (ms)</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT"> </p></td></tr><tr style="margin-left: 30.0px;"><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">dfs.prefetchsize</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">The number of blocks which metadatas will be prefetched.</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">10</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT"> </p></td></tr><tr style="margin-left: 30.0px;"><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">dfs.client_local_block_read_buffer</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">The buffer size if read block from local file system instead of network. </p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">1048576</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT"> </p></td></tr><tr style="margin-left: 30.0px;"><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">dfs.client.socket.write.timeout</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">The timeout interval for socket write operation. </p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">3600000 (ms)</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT"> </p></td></tr><tr style="margin-left: 30.0px;"><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">dfs.client.socket.read.timeout </p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">The timeout interval for socket write operation.</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">3600000 (ms) </p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT"> </p></td></tr><tr style="margin-left: 30.0px;"><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">dfs.client.socket.connect.timeout</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">The timeout interval to setup a tcp socket connection, include resolve host name.</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">3600000 (ms)</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT"> </p></td></tr><tr style="margin-left: 30.0px;"><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">dfs.client.read.verifychecksum</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">Input stream will verify checksum.</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">true </p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT"> </p></td></tr><tr style="margin-left: 30.0px;"><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">dfs.client.enable.read.from.loca</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">Enable input stream to read block directly from local file system. Need to configure on server.</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">true</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT"> </p><p align="LEFT"> </p></td></tr><tr style="margin-left: 30.0px;"><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">dfs.log.file.prefix</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">The libhdfs3 log file prefix, see glog document.</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">libhdfs3</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT"> </p></td></tr><tr style="margin-left: 30.0px;"><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">dfs.log.stderr</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">Output libhdfs3 log to stderr.</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">true</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT"> </p></td></tr><tr style="margin-left: 30.0px;"><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">dfs.replication</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">The default number of replica.</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">3</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT"> </p></td></tr><tr style="margin-left: 30.0px;"><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">dfs.blocksize</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">The default block size, can be overwritten when create output stream.</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT" style="margin-left: 30.0px;">67108864</p></td><td class="confluenceTd" style="margin-left: 30.0px;"><p align="LEFT"> </p></td></tr></tbody></table></div><p align="LEFT" style="margin-left: 30.0px;"><span style="font-size: medium;"> <span lang="EN"> </span> </span></p><p align="LEFT" style="margin-left: 30.0px;"> </p>
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