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See:
Description
Interface Summary | |
---|---|
FlushRequester | Implementors of this interface want to be notified when an HRegion determines that a cache flush is needed. |
HConstants | HConstants holds a bunch of HBase-related constants |
LogRollListener | Mechanism by which the HLog requests a log roll |
MetaUtils.ScannerListener | Used by scanRootRegion and scanMetaRegion to call back the caller so it can process the data for a row. |
Class Summary | |
---|---|
HColumnDescriptor | An HColumnDescriptor contains information about a column family such as the number of versions, compression settings, etc. |
HLog | HLog stores all the edits to the HStore. |
HLogEdit | A log value. |
HLogKey | A Key for an entry in the change log. |
HRegion | HRegion stores data for a certain region of a table. |
HRegionInfo | HRegion information. |
HStore | HStore maintains a bunch of data files. |
HStoreFile | A HStore data file. |
HTableDescriptor | HTableDescriptor contains the name of an HTable, and its column families. |
MetaUtils | Contains utility methods for manipulating HBase meta tables. |
RegionHistorian | The Region Historian task is to keep track of every modification a region has to go through. |
Enum Summary | |
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HColumnDescriptor.CompressionType | The type of compression. |
HStoreFile.Range | For split HStoreFiles, specifies if the file covers the lower half or the upper half of the key range |
RegionHistorian.HistorianColumnKey |
Package of classes used instantiating objects written with pre-version 5
versions of HBase.
Under the hbase.rootdir
, a file named hbase.version
holds the version number for the data persisted by HBase. The version number
is upped every time a change is made in HBase on-filesystem formats. Version
0.2.0 of HBase shipped with an on-filesystem version of 5
. This
package holds classes from previous to version 5 used during the migration of
an HBase instance up to version 5. See
How To Migrate
for more on the migration of HBase across versions and for notes on design
of the HBase migration system.
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