Package org.apache.accumulo.core.client.summary

Class Summary.FileStatistics

java.lang.Object

org.apache.accumulo.core.client.summary.Summary.FileStatistics

Enclosing class:

Summary

public static class Summary.FileStatistics
extends Object

Since:

2.0.0

Method Summary

Modifier and Type	Method	Description
long	getDeleted()
long	getExtra()
long	getInaccurate()
long	getLarge()
long	getMissing()
long	getTotal()
String	toString()

Methods inherited from class java.lang.Object

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

Method Detail

getTotal

public long getTotal()

Returns:

The total number of files from which summary information was obtained.

getMissing

public long getMissing()

Returns:

The number of files that did not contain the requested summary information. When this is non-zero, it means that summary counts may be incomplete. In the Accumulo shell, the compact command has a --sf-no-summary option to compact files missing summary information. The compaction will create the summary information. This could be done over a range of the table to avoid doing the entire table at once.

getExtra

public long getExtra()

Returns:

The number of files that had summary information outside of a tablet or query range boundaries. When this is non-zero, it means that summary counts may be artificially inflated or contain extraneous information. In the Accumulo shell, the compact command has a --sf-extra-summary option to compact files with extra summary information.

getLarge

public long getLarge()

Returns:

The number of files that an attempt was made to generate summaries, but the summarizer generated a summary that was larger than the configured maximum. For these files no summary statistics are stored. Only the fact that summarization was attempted and failed is stored.

See Also:

Summarizer.Collector.summarize(org.apache.accumulo.core.client.summary.Summarizer.StatisticConsumer)

getDeleted

public long getDeleted()

Returns:

The number of files that were deleted after the summary retrieval operations started. This is a rare race condition where a compaction causes a file to be deleted while retrieving summaries. When this happens, the file that replaced the deleted file can not be used because it may contain duplication summary information for other files. Avoiding this race condition would be expensive, so reporting it was chosen. If this condition must be avoided, then compactions must be stopped. Compactions could be stopped on a cloned table to avoid this.

getInaccurate

public long getInaccurate()

Returns:

The total number of files that had some kind of issue which would cause summary statistics to be inaccurate. This is the sum of getMissing(), getExtra(), getLarge(), and getDeleted().

toString

public String toString()

Overrides:

toString in class Object