Package org.apache.accumulo.tserver.log

Class TabletServerLogger

java.lang.Object

org.apache.accumulo.tserver.log.TabletServerLogger

public class TabletServerLogger
extends Object

Central logging facility for the TServerInfo. Forwards in-memory updates to remote logs, carefully writing the same data to every log, while maintaining the maximum thread parallelism for greater performance. As new logs are used and minor compactions are performed, the metadata table is kept up-to-date.

Constructor Summary

Constructors

Constructor	Description
TabletServerLogger(TabletServer tserver, long maxSize, AtomicLong syncCounter, AtomicLong flushCounter, Retry.RetryFactory createRetryFactory, Retry.RetryFactory writeRetryFactory, long maxAge)

Method Summary

Modifier and Type	Method	Description
String	getLogFile()	Get the current WAL file
void	log(CommitSession commitSession, Mutation m, Durability durability)	Log a single mutation.
void	logManyTablets(Map<CommitSession,TabletMutations> loggables)	Log mutations.
void	minorCompactionFinished(CommitSession commitSession, long walogSeq, Durability durability)
long	minorCompactionStarted(CommitSession commitSession, long seq, String fullyQualifiedFileName, Durability durability)
void	recover(VolumeManager fs, KeyExtent extent, List<org.apache.hadoop.fs.Path> logs, Set<String> tabletFiles, MutationReceiver mr)

Methods inherited from class java.lang.Object

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

Constructor Detail

TabletServerLogger

public TabletServerLogger(TabletServer tserver,
                          long maxSize,
                          AtomicLong syncCounter,
                          AtomicLong flushCounter,
                          Retry.RetryFactory createRetryFactory,
                          Retry.RetryFactory writeRetryFactory,
                          long maxAge)

Method Detail

getLogFile

public String getLogFile()

Get the current WAL file

Returns:

The name of the current log, or null if there is no current log.

log

public void log(CommitSession commitSession,
                Mutation m,
                Durability durability)
         throws IOException

Log a single mutation. This method expects mutations that have a durability other than NONE.

Throws:

IOException

logManyTablets

public void logManyTablets(Map<CommitSession,TabletMutations> loggables)
                    throws IOException

Log mutations. This method expects mutations that have a durability other than NONE.

Throws:

IOException

minorCompactionFinished

public void minorCompactionFinished(CommitSession commitSession,
                                    long walogSeq,
                                    Durability durability)
                             throws IOException

Throws:

IOException

minorCompactionStarted

public long minorCompactionStarted(CommitSession commitSession,
                                   long seq,
                                   String fullyQualifiedFileName,
                                   Durability durability)
                            throws IOException

Throws:

IOException

recover

public void recover(VolumeManager fs,
                    KeyExtent extent,
                    List<org.apache.hadoop.fs.Path> logs,
                    Set<String> tabletFiles,
                    MutationReceiver mr)
             throws IOException

Throws:

IOException