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The "HDFS-RAID" page has been changed by PatrickKling. The comment on this change is: Added BlockFixer configuration option.. http://wiki.apache.org/hadoop/HDFS-RAID?action=diff&rev1=7&rev2=8 -------------------------------------------------- === BlockFixer === - (currently under development) - The BlockFixer is a daemon that runs at the RaidNode and periodically inspects the health of the paths for which DRFS is configured. When a file with missing or corrupt blocks is encountered, these blocks are recomputed and inserted back into the file system. There are two implementations of the BlockFixer: - * the LocalBlockFixer, which recomputes bad blocks locally at the RaidNode. + * LocalBlockFixer, which recomputes bad blocks locally at the RaidNode. - * the DistributedBlockFixer, which dispatches map reduce jobs to recompute blocks. + * DistBlockFixer, which dispatches map reduce jobs to recompute blocks. === RaidShell === @@ -227, +225 @@ {{{ <property> <name>fs.raid.underlyingfs.impl</name> - <value>org.apche.hadoop.new.NewFileSystem</value> + <value>org.apache.hadoop.new.NewFileSystem</value> <description>Specify the filesystem that is layered immediately below the DistributedRaidFileSystem. By default, this value is DistributedFileSystem. + </description> + </property + }}} + + Specify the BlockFixer implementation to use (default is DistBlockFixer): + {{{ + <property> + <name>raid.blockfix.classname</name> + <value>org.apache.hadoop.raid.LocalBlockFixer</value> + <description>Specify the BlockFixer implementation to use. + The default is org.apache.hadoop.raid.DistBlockFixer. </description> </property }}}
