本文整理汇总了Java中org.apache.hadoop.hdfs.server.common.StorageInfo.readProperties方法的典型用法代码示例。如果您正苦于以下问题：Java StorageInfo.readProperties方法的具体用法？Java StorageInfo.readProperties怎么用？Java StorageInfo.readProperties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.readProperties方法的2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: canRollBack
import org.apache.hadoop.hdfs.server.common.StorageInfo; //导入方法依赖的package包/类
/**
* Return true if this storage dir can roll back to the previous storage
* state, false otherwise. The NN will refuse to run the rollback operation
* unless at least one JM or fsimage storage directory can roll back.
*
* @param storage the storage info for the current state
* @param prevStorage the storage info for the previous (unupgraded) state
* @param targetLayoutVersion the layout version we intend to roll back to
* @return true if this JM can roll back, false otherwise.
* @throws IOException in the event of error
*/
static boolean canRollBack(StorageDirectory sd, StorageInfo storage,
StorageInfo prevStorage, int targetLayoutVersion) throws IOException {
File prevDir = sd.getPreviousDir();
if (!prevDir.exists()) { // use current directory then
LOG.info("Storage directory " + sd.getRoot()
+ " does not contain previous fs state.");
// read and verify consistency with other directories
storage.readProperties(sd);
return false;
}
// read and verify consistency of the prev dir
prevStorage.readPreviousVersionProperties(sd);
if (prevStorage.getLayoutVersion() != targetLayoutVersion) {
throw new IOException(
"Cannot rollback to storage version " +
prevStorage.getLayoutVersion() +
" using this version of the NameNode, which uses storage version " +
targetLayoutVersion + ". " +
"Please use the previous version of HDFS to perform the rollback.");
}
return true;
}
示例2: 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();
}