本文整理汇总了Java中org.apache.hadoop.hdfs.server.common.StorageInfo.getCTime方法的典型用法代码示例。如果您正苦于以下问题：Java StorageInfo.getCTime方法的具体用法？Java StorageInfo.getCTime怎么用？Java StorageInfo.getCTime使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类org.apache.hadoop.hdfs.server.common.StorageInfo的用法示例。
在下文中一共展示了StorageInfo.getCTime方法的3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: getJournalCTime
import org.apache.hadoop.hdfs.server.common.StorageInfo; //导入方法依赖的package包/类
@Override
public long getJournalCTime() throws IOException {
StorageInfo sInfo = new StorageInfo((NodeType)null);
sInfo.readProperties(sd);
return sInfo.getCTime();
}
示例2: isVersionCompatible
import org.apache.hadoop.hdfs.server.common.StorageInfo; //导入方法依赖的package包/类
/**
* Determines if the given Namenode version and Datanode version
* are compatible with each other. Compatibility in this case mean
* that the Namenode and Datanode will successfully start up and
* will work together. The rules for compatibility,
* taken from the DFS Upgrade Design, are as follows:
* <pre>
* <ol>
* <li>Check 0: Datanode namespaceID != Namenode namespaceID the startup fails
* </li>
* <li>Check 1: Datanode clusterID != Namenode clusterID the startup fails
* </li>
* <li>Check 2: Datanode blockPoolID != Namenode blockPoolID the startup fails
* </li>
* <li>Check 3: The data-node does regular startup (no matter which options
* it is started with) if
* softwareLV == storedLV AND
* DataNode.FSSCTime == NameNode.FSSCTime
* </li>
* <li>Check 4: The data-node performs an upgrade if it is started without any
* options and
* |softwareLV| > |storedLV| OR
* (softwareLV == storedLV AND
* DataNode.FSSCTime < NameNode.FSSCTime)
* </li>
* <li>NOT TESTED: The data-node rolls back if it is started with
* the -rollback option and
* |softwareLV| >= |previous.storedLV| AND
* DataNode.previous.FSSCTime <= NameNode.FSSCTime
* </li>
* <li>Check 5: In all other cases the startup fails.</li>
* </ol>
* </pre>
*/
boolean isVersionCompatible(StorageData namenodeSd, StorageData datanodeSd) {
final StorageInfo namenodeVer = namenodeSd.storageInfo;
final StorageInfo datanodeVer = datanodeSd.storageInfo;
// check #0
if (namenodeVer.getNamespaceID() != datanodeVer.getNamespaceID()) {
LOG.info("namespaceIDs are not equal: isVersionCompatible=false");
return false;
}
// check #1
if (!namenodeVer.getClusterID().equals(datanodeVer.getClusterID())) {
LOG.info("clusterIDs are not equal: isVersionCompatible=false");
return false;
}
// check #2
if (!namenodeSd.blockPoolId.equals(datanodeSd.blockPoolId)) {
LOG.info("blockPoolIDs are not equal: isVersionCompatible=false");
return false;
}
// check #3
int softwareLV = HdfsConstants.DATANODE_LAYOUT_VERSION;
int storedLV = datanodeVer.getLayoutVersion();
if (softwareLV == storedLV &&
datanodeVer.getCTime() == namenodeVer.getCTime())
{
LOG.info("layoutVersions and cTimes are equal: isVersionCompatible=true");
return true;
}
// check #4
long absSoftwareLV = Math.abs((long)softwareLV);
long absStoredLV = Math.abs((long)storedLV);
if (absSoftwareLV > absStoredLV ||
(softwareLV == storedLV &&
datanodeVer.getCTime() < namenodeVer.getCTime()))
{
LOG.info("softwareLayoutVersion is newer OR namenode cTime is newer: isVersionCompatible=true");
return true;
}
// check #5
LOG.info("default case: isVersionCompatible=false");
return false;
}
示例3: isVersionCompatible
import org.apache.hadoop.hdfs.server.common.StorageInfo; //导入方法依赖的package包/类
/**
* Determines if the given Namenode version and Datanode version
* are compatible with each other. Compatibility in this case mean
* that the Namenode and Datanode will successfully start up and
* will work together. The rules for compatibility,
* taken from the DFS Upgrade Design, are as follows:
* <pre>
* <ol>
* <li>Check 0: Datanode namespaceID != Namenode namespaceID the startup fails
* </li>
* <li>Check 1: Datanode clusterID != Namenode clusterID the startup fails
* </li>
* <li>Check 2: Datanode blockPoolID != Namenode blockPoolID the startup fails
* </li>
* <li>Check 3: The data-node does regular startup (no matter which options
* it is started with) if
* softwareLV == storedLV AND
* DataNode.FSSCTime == NameNode.FSSCTime
* </li>
* <li>Check 4: The data-node performs an upgrade if it is started without any
* options and
* |softwareLV| > |storedLV| OR
* (softwareLV == storedLV AND
* DataNode.FSSCTime < NameNode.FSSCTime)
* </li>
* <li>NOT TESTED: The data-node rolls back if it is started with
* the -rollback option and
* |softwareLV| >= |previous.storedLV| AND
* DataNode.previous.FSSCTime <= NameNode.FSSCTime
* </li>
* <li>Check 5: In all other cases the startup fails.</li>
* </ol>
* </pre>
*/
boolean isVersionCompatible(StorageData namenodeSd, StorageData datanodeSd) {
final StorageInfo namenodeVer = namenodeSd.storageInfo;
final StorageInfo datanodeVer = datanodeSd.storageInfo;
// check #0
if (namenodeVer.getNamespaceID() != datanodeVer.getNamespaceID()) {
LOG.info("namespaceIDs are not equal: isVersionCompatible=false");
return false;
}
// check #1
if (!namenodeVer.getClusterID().equals(datanodeVer.getClusterID())) {
LOG.info("clusterIDs are not equal: isVersionCompatible=false");
return false;
}
// check #2
if (!namenodeSd.blockPoolId.equals(datanodeSd.blockPoolId)) {
LOG.info("blockPoolIDs are not equal: isVersionCompatible=false");
return false;
}
// check #3
int softwareLV = HdfsServerConstants.DATANODE_LAYOUT_VERSION;
int storedLV = datanodeVer.getLayoutVersion();
if (softwareLV == storedLV &&
datanodeVer.getCTime() == namenodeVer.getCTime())
{
LOG.info("layoutVersions and cTimes are equal: isVersionCompatible=true");
return true;
}
// check #4
long absSoftwareLV = Math.abs((long)softwareLV);
long absStoredLV = Math.abs((long)storedLV);
if (absSoftwareLV > absStoredLV ||
(softwareLV == storedLV &&
datanodeVer.getCTime() < namenodeVer.getCTime()))
{
LOG.info("softwareLayoutVersion is newer OR namenode cTime is newer: isVersionCompatible=true");
return true;
}
// check #5
LOG.info("default case: isVersionCompatible=false");
return false;
}