Package org.apache.accumulo.server.util

Class TableDiskUsage

java.lang.Object

org.apache.accumulo.server.util.TableDiskUsage

public class TableDiskUsage
extends Object

This utility class will scan the Accumulo Metadata table to compute the disk usage for a table or table(s) by using the size value stored in columns that contain the column family MetadataSchema.TabletsSection.DataFileColumnFamily. This class will also track shared files to computed shared usage across all tables that are provided as part of the Set of tables when getting disk usage. Because the metadata table is used for computing usage and not the actual files in HDFS the results will be an estimate. Older entries may exist with no file metadata (resulting in size 0) and other actions in the cluster can impact the estimated size such as flushes, tablet splits, compactions, etc. For more accurate information a compaction should first be run on all files for the set of tables being computed.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	TableDiskUsage.Printer

Constructor Summary

Constructors

Constructor	Description
TableDiskUsage()

Method Summary

Modifier and Type	Method	Description
protected static Map<SortedSet<String>,Long>	buildSharedUsageMap(TableDiskUsage tdu, ClientContext clientContext, Set<TableId> emptyTableIds)
static Map<SortedSet<String>,Long>	getDiskUsage(Set<TableId> tableIds, AccumuloClient client)	Compute the estimated disk usage for the given set of tables by scanning the Metadata table for file sizes.
static void	main(String[] args)
static void	printDiskUsage(Collection<String> tableNames, AccumuloClient client, boolean humanReadable)
static void	printDiskUsage(Collection<String> tableNames, AccumuloClient client, TableDiskUsage.Printer printer, boolean humanReadable)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

TableDiskUsage

public TableDiskUsage()

Method Detail

printDiskUsage

public static void printDiskUsage(Collection<String> tableNames,
                                  AccumuloClient client,
                                  boolean humanReadable)
                           throws TableNotFoundException,
                                  IOException

Throws:

TableNotFoundException

IOException

getDiskUsage

public static Map<SortedSet<String>,Long> getDiskUsage(Set<TableId> tableIds,
                                                             AccumuloClient client)
                                                      throws TableNotFoundException

Compute the estimated disk usage for the given set of tables by scanning the Metadata table for file sizes. Optionally computes shared usage across tables.

Parameters:

tableIds - set of tables to compute an estimated disk usage for

client - accumulo client used to scan

Returns:

the computed estimated usage results

Throws:

TableNotFoundException - if the table(s) do not exist

buildSharedUsageMap

protected static Map<SortedSet<String>,Long> buildSharedUsageMap(TableDiskUsage tdu,
                                                                       ClientContext clientContext,
                                                                       Set<TableId> emptyTableIds)

printDiskUsage

public static void printDiskUsage(Collection<String> tableNames,
                                  AccumuloClient client,
                                  TableDiskUsage.Printer printer,
                                  boolean humanReadable)
                           throws TableNotFoundException,
                                  IOException

Throws:

TableNotFoundException

IOException

main

public static void main(String[] args)
                 throws Exception

Throws:

Exception