Richard, The property disables major compactions from happening automatically. However, if you choose to do this, you should ensure you have a cron job that does trigger major_compact on all tables - for compaction is a necessary thing, but you just do not want it to happen at any time it likes to.
Also, all properties to be overriden must go to $HBASE_HOME/conf/hbase-site.xml, and you do not need to edit source files and recompile for every config change you want to do. On Thu, Aug 9, 2012 at 5:37 PM, Richard Tang <[email protected]> wrote: > That is right. I have tried following properties, in conf/hbase-site.xml. > It looks it works to disable both major and minor (in some sense) > compactions. > Note these properties are defined in src/main/resources/hbase-default.xml, > but putting the property there without recompiling the src, it will not > work. > > <property> > <name>hbase.hstore.compactionThreshold</name> > <value>100</value> > <description> > If more than this number of HStoreFiles in any one HStore > (one HStoreFile is written per flush of memstore) then a compaction > is run to rewrite all HStoreFiles files as one. Larger numbers > put off compaction but when it runs, it takes longer to complete. > </description> > </property> > > <property> > <name>hbase.hstore.blockingStoreFiles</name> > <value>7</value> > <description> > If more than this number of StoreFiles in any one Store > (one StoreFile is written per flush of MemStore) then updates are > blocked for this HRegion until a compaction is completed, or > until hbase.hstore.blockingWaitTime has been exceeded. > </description> > </property> > > <property> > <name>hbase.hstore.blockingWaitTime</name> > <value>90000</value> > <description> > The time an HRegion will block updates for after hitting the StoreFile > limit defined by hbase.hstore.blockingStoreFiles. > After this time has elapsed, the HRegion will stop blocking updates even > if a compaction has not been completed. Default: 90 seconds. > </description> > </property> > > <property> > <name>hbase.hstore.compaction.max</name> > <value>100</value> > <description>Max number of HStoreFiles to compact per 'minor' compaction. > </description> > </property> > > <property> > <name>hbase.hregion.majorcompaction</name> > <value>0</value> > <description>The time (in miliseconds) between 'major' compactions of all > HStoreFiles in a region. Default: 1 day. > Set to 0 to disable automated major compactions. > </description> > </property> > > On Thu, Aug 9, 2012 at 7:03 AM, henry.kim <[email protected]> wrote: > >> yes, there is a property in hbase-site.xml >> >> check the property which is named 'hbase.hregion.majorcompaction' >> >> if you set it to value 0, there will be no automatic compactions. >> >> 2012. 8. 9., 오후 7:43, Richard Tang <[email protected]> 작성: >> >> > I am using hbase 0.92.1 and want to disable compaction (both major and >> > minor compactions) for a period of time. is that configurable in hbase? >> >> -- Harsh J
