hbase,hadoop:如何估计hbase表或hadoop文件系统路径的大小?

vsdwdz23  于 2021-05-29  发布在  Hadoop
关注(0)|答案(1)|浏览(302)

我有多个hbase表,如何估计java中使用的表的大致大小?

vltsax25

vltsax251#

一种方法是您必须使用java客户机访问hdfs,通常在 /hbase 把所有的表信息都放进文件夹。将出现。

hadoop外壳:

你可以用 hadoop fs -du -h**path to hbase**/hbase 在/hbase下,每个表又占用一个文件夹。。。
hadoop fs -ls -Rpath to hbase/hbase hadoop fs -du -h**path to hbase**/hbase/tablename ####java hdfs客户端:
同样,您可以使用JavaHDFS客户机,通过在hbase根目录下传递每个表路径,如下所示。。。检查 getSizeOfPaths & getSizeOfDirectory 方法

public class HdfsUtil {
    /**
     * Estimates the number of splits by taking the size of the paths and dividing by the splitSize.
     *
     * @param paths
     * @param configuration
     * @param splitSize
     * @return
     * @throws IOException
     */
    public static long getNumOfSplitsForInputs(Path[] paths, Configuration configuration, long splitSize) throws IOException
    {
        long size = getSizeOfPaths(paths, configuration);
        long splits = (int) Math.ceil( size / (splitSize)) ;
        return splits;
    }

    public static long getSizeOfPaths(Path[] paths, Configuration configuration) throws IOException
    {
        long totalSize = 0L;

        for(Path path: paths)
        {
           totalSize += getSizeOfDirectory(path, configuration);
        }
        return totalSize;
    }
// here you can give hbase path folder which was described through shell
        public static long getSizeOfDirectory(Path path, Configuration configuration) throws IOException {
            //Get the file size of the unannotated Edges
            FileSystem fileSystem = FileSystem.get(configuration);
            long size  = fileSystem.getContentSummary(path).getLength();
/**static String    byteCountToDisplaySize(BigInteger size)
Returns a human-readable version of the file size, where the input represents a specific number of bytes.**/
System.out.println(FileUtils.byteCountToDisplaySize(size))
            return size;
        }
    }

相关问题