Package org.apache.hadoop.hbase.wal

Interface Summary

Interface	Description
AbstractFSWALProvider.Reader
AsyncFSWALProvider.AsyncWriter
FSHLogProvider.Writer
RegionGroupingProvider.RegionGroupingStrategy	Map identifiers to a group number.
WAL	A Write Ahead Log (WAL) provides service for reading, writing waledits.
WAL.Reader	When outside clients need to consume persisted WALs, they rely on a provided Reader.
WALKey	Key for WAL Entry.
WALProvider	The Write Ahead Log (WAL) stores all durable edits to the HRegion.
WALProvider.AsyncWriter
WALProvider.Writer
WALProvider.WriterBase

Class Summary

Class	Description
AbstractFSWALProvider<T extends AbstractFSWAL<?>>	Base class of a WAL Provider that returns a single thread safe WAL that writes to Hadoop FS.
AsyncFSWALProvider	A WAL provider that use AsyncFSWAL.
BoundedGroupingStrategy	A WAL grouping strategy that limits the number of wal groups to "hbase.wal.regiongrouping.numgroups".
BoundedLogWriterCreationOutputSink	Class that manages the output streams from the log splitting process.
DisabledWALProvider	No-op implementation of WALProvider used when the WAL is disabled.
DisabledWALProvider.DisabledWAL
EntryBuffers	Class which accumulates edits and separates them into a buffer per region while simultaneously accounting RAM usage.
FSHLogProvider	A WAL provider that use FSHLog.
LogRecoveredEditsOutputSink	Class that manages the output streams from the log splitting process.
NamespaceGroupingStrategy	A WAL grouping strategy based on namespace.
NettyAsyncFSWALConfigHelper	Helper class for passing netty event loop config to AsyncFSWALProvider.
OutputSink	The following class is an abstraction class to provide a common interface to support different ways of consuming recovered edits.
OutputSink.WriterThread
RegionGroupingProvider	A WAL Provider that returns a WAL per group of regions.
RegionGroupingProvider.IdentityGroupingStrategy
WAL.Entry	Utility class that lets us keep track of the edit with it's key.
WALEdit	Used in HBase's transaction log (WAL) to represent a collection of edits (Cell/KeyValue objects) that came in as a single transaction.
WALFactory	Entry point for users of the Write Ahead Log.
WALKeyImpl	Default implementation of Key for an Entry in the WAL.
WALPrettyPrinter	WALPrettyPrinter prints the contents of a given WAL with a variety of options affecting formatting and extent of content.
WALSplitter	This class is responsible for splitting up a bunch of regionserver commit log files that are no longer being written to, into new files, one per region, for recovering data on startup.
WALSplitter.PipelineController	Contains some methods to control WAL-entries producer / consumer interactions
WALSplitter.RegionEntryBuffer	A buffer of some number of edits for a given region.
WALSplitter.SinkWriter	Class wraps the actual writer which writes data out and related statistics
WALSplitter.WriterAndPath	Private data structure that wraps a Writer and its Path, also collecting statistics about the data written to this output.
WALSplitUtil	This class provides static methods to support WAL splitting related works
WALSplitUtil.MutationReplay	A struct used by getMutationsFromWALEntry

Enum Summary

Enum	Description
RegionGroupingProvider.Strategies	Maps between configuration names for strategies and implementation classes.
WALFactory.Providers	Maps between configuration names for providers and implementation classes.

Exception Summary

Exception	Description
WALSplitter.CorruptedLogFileException