http://git-wip-us.apache.org/repos/asf/hbase-site/blob/6cafca90/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/HRegion.RegionScannerImpl.html ---------------------------------------------------------------------- diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/HRegion.RegionScannerImpl.html b/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/HRegion.RegionScannerImpl.html index fe28fe2..86378be 100644 --- a/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/HRegion.RegionScannerImpl.html +++ b/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/HRegion.RegionScannerImpl.html @@ -1765,6408 +1765,6439 @@ <span class="sourceLineNo">1757</span> }<a name="line.1757"></a> <span class="sourceLineNo">1758</span> }<a name="line.1758"></a> <span class="sourceLineNo">1759</span><a name="line.1759"></a> -<span class="sourceLineNo">1760</span> protected ThreadPoolExecutor getStoreOpenAndCloseThreadPool(<a name="line.1760"></a> -<span 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class="sourceLineNo">1820</span> });<a name="line.1820"></a> +<span class="sourceLineNo">1821</span> }<a name="line.1821"></a> +<span class="sourceLineNo">1822</span><a name="line.1822"></a> +<span class="sourceLineNo">1823</span> /**<a name="line.1823"></a> +<span class="sourceLineNo">1824</span> * @return True if its worth doing a flush before we put up the close flag.<a name="line.1824"></a> +<span class="sourceLineNo">1825</span> */<a name="line.1825"></a> +<span class="sourceLineNo">1826</span> private boolean worthPreFlushing() {<a name="line.1826"></a> +<span class="sourceLineNo">1827</span> return this.memstoreDataSize.get() ><a name="line.1827"></a> +<span class="sourceLineNo">1828</span> this.conf.getLong("hbase.hregion.preclose.flush.size", 1024 * 1024 * 5);<a name="line.1828"></a> +<span class="sourceLineNo">1829</span> }<a name="line.1829"></a> +<span class="sourceLineNo">1830</span><a name="line.1830"></a> +<span class="sourceLineNo">1831</span> //////////////////////////////////////////////////////////////////////////////<a name="line.1831"></a> +<span class="sourceLineNo">1832</span> // HRegion accessors<a name="line.1832"></a> +<span class="sourceLineNo">1833</span> //////////////////////////////////////////////////////////////////////////////<a name="line.1833"></a> +<span class="sourceLineNo">1834</span><a name="line.1834"></a> +<span class="sourceLineNo">1835</span> @Override<a name="line.1835"></a> +<span class="sourceLineNo">1836</span> public HTableDescriptor getTableDesc() {<a name="line.1836"></a> +<span class="sourceLineNo">1837</span> return this.htableDescriptor;<a name="line.1837"></a> +<span class="sourceLineNo">1838</span> }<a name="line.1838"></a> +<span class="sourceLineNo">1839</span><a name="line.1839"></a> +<span class="sourceLineNo">1840</span> /** @return WAL in use for this region */<a name="line.1840"></a> +<span class="sourceLineNo">1841</span> public WAL getWAL() {<a name="line.1841"></a> +<span class="sourceLineNo">1842</span> return this.wal;<a name="line.1842"></a> +<span class="sourceLineNo">1843</span> }<a name="line.1843"></a> +<span class="sourceLineNo">1844</span><a name="line.1844"></a> +<span class="sourceLineNo">1845</span> /**<a name="line.1845"></a> +<span class="sourceLineNo">1846</span> * @return split policy for this region.<a name="line.1846"></a> +<span class="sourceLineNo">1847</span> */<a name="line.1847"></a> +<span class="sourceLineNo">1848</span> public RegionSplitPolicy getSplitPolicy() {<a name="line.1848"></a> +<span class="sourceLineNo">1849</span> return this.splitPolicy;<a name="line.1849"></a> +<span class="sourceLineNo">1850</span> }<a name="line.1850"></a> +<span class="sourceLineNo">1851</span><a name="line.1851"></a> +<span class="sourceLineNo">1852</span> /**<a name="line.1852"></a> +<span class="sourceLineNo">1853</span> * A split takes the config from the parent region & passes it to the daughter<a name="line.1853"></a> +<span class="sourceLineNo">1854</span> * region's constructor. 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class="sourceLineNo">1885</span> // HRegion maintenance.<a name="line.1885"></a> -<span class="sourceLineNo">1886</span> //<a name="line.1886"></a> -<span class="sourceLineNo">1887</span> // These methods are meant to be called periodically by the HRegionServer for<a name="line.1887"></a> -<span class="sourceLineNo">1888</span> // upkeep.<a name="line.1888"></a> -<span class="sourceLineNo">1889</span> //////////////////////////////////////////////////////////////////////////////<a name="line.1889"></a> -<span class="sourceLineNo">1890</span><a name="line.1890"></a> -<span class="sourceLineNo">1891</span> /** @return returns size of largest HStore. */<a name="line.1891"></a> -<span class="sourceLineNo">1892</span> public long getLargestHStoreSize() {<a name="line.1892"></a> -<span class="sourceLineNo">1893</span> long size = 0;<a name="line.1893"></a> -<span class="sourceLineNo">1894</span> for (Store h : stores.values()) {<a name="line.1894"></a> -<span class="sourceLineNo">1895</span> 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class="sourceLineNo">1974</span> public void compactStores() throws IOException {<a name="line.1974"></a> +<span class="sourceLineNo">1975</span> for (Store s : getStores()) {<a name="line.1975"></a> +<span class="sourceLineNo">1976</span> CompactionContext compaction = s.requestCompaction();<a name="line.1976"></a> +<span class="sourceLineNo">1977</span> if (compaction != null) {<a name="line.1977"></a> +<span class="sourceLineNo">1978</span> compact(compaction, s, NoLimitThroughputController.INSTANCE, null);<a name="line.1978"></a> +<span class="sourceLineNo">1979</span> }<a name="line.1979"></a> +<span class="sourceLineNo">1980</span> }<a name="line.1980"></a> +<span class="sourceLineNo">1981</span> }<a name="line.1981"></a> +<span class="sourceLineNo">1982</span><a name="line.1982"></a> +<span class="sourceLineNo">1983</span> /**<a name="line.1983"></a> +<span class="sourceLineNo">1984</span> * This is a helper function that compact the given store<a name="line.1984"></a> +<span class="sourceLineNo">1985</span> * It is used by utilities and testing<a name="line.1985"></a> +<span class="sourceLineNo">1986</span> *<a name="line.1986"></a> +<span class="sourceLineNo">1987</span> * @throws IOException e<a name="line.1987"></a> +<span class="sourceLineNo">1988</span> */<a name="line.1988"></a> +<span class="sourceLineNo">1989</span> @VisibleForTesting<a name="line.1989"></a> +<span class="sourceLineNo">1990</span> void compactStore(byte[] family, ThroughputController throughputController)<a name="line.1990"></a> +<span class="sourceLineNo">1991</span> throws IOException {<a name="line.1991"></a> +<span class="sourceLineNo">1992</span> Store s = getStore(family);<a name="line.1992"></a> +<span class="sourceLineNo">1993</span> CompactionContext compaction = s.requestCompaction();<a name="line.1993"></a> +<span class="sourceLineNo">1994</span> if (compaction != null) {<a name="line.1994"></a> +<span class="sourceLineNo">1995</span> compact(compaction, s, throughputController, null);<a name="line.1995"></a> <span class="sourceLineNo">1996</span> }<a name="line.1996"></a> -<span class="sourceLineNo">1997</span> MonitoredTask status = null;<a name="line.1997"></a> -<span class="sourceLineNo">1998</span> boolean requestNeedsCancellation = true;<a name="line.1998"></a> -<span class="sourceLineNo">1999</span> /*<a name="line.1999"></a> -<span class="sourceLineNo">2000</span> * We are trying to remove / relax the region read lock for compaction.<a name="line.2000"></a> -<span class="sourceLineNo">2001</span> * Let's see what are the potential race conditions among the operations (user scan,<a name="line.2001"></a> -<span class="sourceLineNo">2002</span> * region split, region close and region bulk load).<a name="line.2002"></a> -<span class="sourceLineNo">2003</span> *<a name="line.2003"></a> -<span class="sourceLineNo">2004</span> * user scan ---> region read lock<a name="line.2004"></a> -<span class="sourceLineNo">2005</span> * region split --> region close first --> region write lock<a name="line.2005"></a> -<span class="sourceLineNo">2006</span> * region close --> region write lock<a name="line.2006"></a> -<span class="sourceLineNo">2007</span> * region bulk load --> region write lock<a name="line.2007"></a> -<span class="sourceLineNo">2008</span> *<a name="line.2008"></a> -<span class="sourceLineNo">2009</span> * read lock is compatible with read lock. ---> no problem with user scan/read<a name="line.2009"></a> -<span class="sourceLineNo">2010</span> * region bulk load does not cause problem for compaction (no consistency problem, store lock<a name="line.2010"></a> -<span class="sourceLineNo">2011</span> * will help the store file accounting).<a name="line.2011"></a> -<span class="sourceLineNo">2012</span> * They can run almost concurrently at the region level.<a name="line.2012"></a> -<span class="sourceLineNo">2013</span> *<a name="line.2013"></a> -<span class="sourceLineNo">2014</span> * The only remaining race 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class="sourceLineNo">2268</span> * Should the memstore be flushed now<a name="line.2268"></a> -<span class="sourceLineNo">2269</span> */<a name="line.2269"></a> -<span class="sourceLineNo">2270</span> boolean shouldFlush(final StringBuffer whyFlush) {<a name="line.2270"></a> -<span class="sourceLineNo">2271</span> whyFlush.setLength(0);<a name="line.2271"></a> -<span class="sourceLineNo">2272</span> // This is a rough measure.<a name="line.2272"></a> -<span class="sourceLineNo">2273</span> if (this.maxFlushedSeqId > 0<a name="line.2273"></a> -<span class="sourceLineNo">2274</span> && (this.maxFlushedSeqId + this.flushPerChanges < this.mvcc.getReadPoint())) {<a name="line.2274"></a> -<span class="sourceLineNo">2275</span> whyFlush.append("more than max edits, " + this.flushPerChanges + ", since last flush");<a name="line.2275"></a> -<span class="sourceLineNo">2276</span> return true;<a name="line.2276"></a> -<span class="sourceLineNo">2277</span> }<a name="line.2277"></a> -<span class="sourceLineNo">2278</span> long modifiedFlushCheckInterval = flushCheckInterval;<a name="line.2278"></a> -<span class="sourceLineNo">2279</span> if (getRegionInfo().isSystemTable() &&<a name="line.2279"></a> -<span class="sourceLineNo">2280</span> getRegionInfo().getReplicaId() == HRegionInfo.DEFAULT_REPLICA_ID) {<a name="line.2280"></a> -<span class="sourceLineNo">2281</span> modifiedFlushCheckInterval = SYSTEM_CACHE_FLUSH_INTERVAL;<a name="line.2281"></a> +<span class="sourceLineNo">1997</span> }<a name="line.1997"></a> +<span class="sourceLineNo">1998</span><a name="line.1998"></a> +<span class="sourceLineNo">1999</span> /*<a name="line.1999"></a> +<span class="sourceLineNo">2000</span> * Called by compaction thread and after region is opened to compact the<a name="line.2000"></a> +<span class="sourceLineNo">2001</span> * HStores if necessary.<a name="line.2001"></a> +<span class="sourceLineNo">2002</span> *<a name="line.2002"></a> +<span class="sourceLineNo">2003</span> * <p>This operation could block for a long time, so don't call it from a<a name="line.2003"></a> +<span class="sourceLineNo">2004</span> * time-sensitive thread.<a name="line.2004"></a> +<span class="sourceLineNo">2005</span> *<a name="line.2005"></a> +<span class="sourceLineNo">2006</span> * Note that no locking is necessary at this level because compaction only<a name="line.2006"></a> +<span class="sourceLineNo">2007</span> * conflicts with a region split, and that cannot happen because the region<a name="line.2007"></a> +<span class="sourceLineNo">2008</span> * server does them sequentially and not in parallel.<a name="line.2008"></a> +<span class="sourceLineNo">2009</span> *<a name="line.2009"></a> +<span class="sourceLineNo">2010</span> * @param compaction Compaction details, obtained by requestCompaction()<a name="line.2010"></a> +<span class="sourceLineNo">2011</span> * @param throughputController<a name="line.2011"></a> +<span class="sourceLineNo">2012</span> * @return whether the compaction completed<a name="line.2012"></a> +<span class="sourceLineNo">2013</span> */<a name="line.2013"></a> +<span class="sourceLineNo">2014</span> public boolean compact(CompactionContext compaction, Store store,<a name="line.2014"></a> +<span class="sourceLineNo">2015</span> ThroughputController throughputController) throws IOException {<a name="line.2015"></a> +<span class="sourceLineNo">2016</span> return compact(compaction, store, throughputController, null);<a name="line.2016"></a> +<span class="sourceLineNo">2017</span> }<a name="line.2017"></a> +<span class="sourceLineNo">2018</span><a name="line.2018"></a> +<span class="sourceLineNo">2019</span> public boolean compact(CompactionContext compaction, Store store,<a name="line.2019"></a> +<span class="sourceLineNo">2020</span> ThroughputController throughputController, User user) throws IOException {<a name="line.2020"></a> +<span class="sourceLineNo">2021</span> assert compaction != null && compaction.hasSelection();<a 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for compaction.<a name="line.2031"></a> +<span class="sourceLineNo">2032</span> * Let's see what are the potential race conditions among the operations (user scan,<a name="line.2032"></a> +<span class="sourceLineNo">2033</span> * region split, region close and region bulk load).<a name="line.2033"></a> +<span class="sourceLineNo">2034</span> *<a name="line.2034"></a> +<span class="sourceLineNo">2035</span> * user scan ---> region read lock<a name="line.2035"></a> +<span class="sourceLineNo">2036</span> * region split --> region close first --> region write lock<a name="line.2036"></a> +<span class="sourceLineNo">2037</span> * region close --> region write lock<a name="line.2037"></a> +<span class="sourceLineNo">2038</span> * region bulk load --> region write lock<a name="line.2038"></a> +<span class="sourceLineNo">2039</span> *<a name="line.2039"></a> +<span class="sourceLineNo">2040</span> * read lock is compatible with read lock. ---> no problem with user scan/read<a 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This patch does not change this --> no worse or better<a name="line.2055"></a> +<span class="sourceLineNo">2056</span> * For #2, we obtain smallest read point (for region) across all the Scanners (for both default<a name="line.2056"></a> +<span class="sourceLineNo">2057</span> * compactor and stripe compactor).<a name="line.2057"></a> +<span class="sourceLineNo">2058</span> * The read points are for user scans. Region keeps the read points for all currently open<a name="line.2058"></a> +<span class="sourceLineNo">2059</span> * user scanners.<a name="line.2059"></a> +<span class="sourceLineNo">2060</span> * Compaction needs to know the smallest read point so that during re-write of the hfiles,<a name="line.2060"></a> +<span class="sourceLineNo">2061</span> * it can remove the mvcc points for the cells if their mvccs are older than the smallest<a name="line.2061"></a> +<span class="sourceLineNo">2062</span> * since they are not needed anymore.<a name="line.2062"></a> +<span class="sourceLineNo">2063</span> * This will not conflict with compaction.<a name="line.2063"></a> +<span class="sourceLineNo">2064</span> * For #3, it can be performed in parallel to other operations.<a name="line.2064"></a> +<span class="sourceLineNo">2065</span> * For #4 bulk load and compaction don't conflict with each other on the region level<a name="line.2065"></a> +<span class="sourceLineNo">2066</span> * (for multi-family atomicy).<a name="line.2066"></a> +<span class="sourceLineNo">2067</span> * Region close and compaction are guarded pretty well by the 'writestate'.<a name="line.2067"></a> +<span class="sourceLineNo">2068</span> * In HRegion#doClose(), we have :<a name="line.2068"></a> +<span class="sourceLineNo">2069</span> * synchronized (writestate) {<a name="line.2069"></a> +<span class="sourceLineNo">2070</span> * // Disable compacting and flushing by background threads for this<a name="line.2070"></a> +<span class="sourceLineNo">2071</span> * // region.<a name="line.2071"></a> +<span class="sourceLineNo">2072</span> * canFlush = !writestate.readOnly;<a name="line.2072"></a> +<span class="sourceLineNo">2073</span> * writestate.writesEnabled = false;<a name="line.2073"></a> +<span class="sourceLineNo">2074</span> * LOG.debug("Closing " + this + ": disabling compactions & flushes");<a name="line.2074"></a> +<span class="sourceLineNo">2075</span> * waitForFlushesAndCompactions();<a name="line.2075"></a> +<span class="sourceLineNo">2076</span> * }<a name="line.2076"></a> +<span class="sourceLineNo">2077</span> * waitForFlushesAndCompactions() would wait for writestate.compacting to come down to 0.<a name="line.2077"></a> +<span class="sourceLineNo">2078</span> * and in HRegion.compact()<a name="line.2078"></a> +<span class="sourceLineNo">2079</span> * try {<a name="line.2079"></a> +<span class="sourceLineNo">2080</span> * synchronized (writestate) {<a name="line.2080"></a> +<span class="sourceLineNo">2081</span> * if (writestate.writesEnabled) {<a name="line.2081"></a> +<span class="sourceLineNo">2082</span> * wasStateSet = true;<a name="line.2082"></a> +<span class="sourceLineNo">2083</span> * ++writestate.compacting;<a name="line.2083"></a> +<span class="sourceLineNo">2084</span> * } else {<a name="line.2084"></a> +<span class="sourceLineNo">2085</span> * String msg = "NOT compacting region " + this + ". Writes disabled.";<a name="line.2085"></a> +<span class="sourceLineNo">2086</span> * LOG.info(msg);<a name="line.2086"></a> +<span class="sourceLineNo">2087</span> * status.abort(msg);<a name="line.2087"></a> +<span class="sourceLineNo">2088</span> * return false;<a name="line.2088"></a> +<span class="sourceLineNo">2089</span> * }<a name="line.2089"></a> +<span class="sourceLineNo">2090</span> * }<a name="line.2090"></a> +<span class="sourceLineNo">2091</span> * Also in compactor.performCompaction():<a name="line.2091"></a> +<span class="sourceLineNo">2092</span> * check periodically to see if a system stop is requested<a name="line.2092"></a> +<span class="sourceLineNo">2093</span> * if (closeCheckInterval > 0) {<a name="line.2093"></a> +<span class="sourceLineNo">2094</span> * bytesWritten += len;<a name="line.2094"></a> +<span class="sourceLineNo">2095</span> * if (bytesWritten > closeCheckInterval) {<a name="line.2095"></a> +<span class="sourceLineNo">2096</span> * bytesWritten = 0;<a name="line.2096"></a> +<span class="sourceLineNo">2097</span> * if (!store.areWritesEnabled()) {<a name="line.2097"></a> +<span class="sourceLineNo">2098</span> * progress.cancel();<a name="line.2098"></a> +<span class="sourceLineNo">2099</span> * return false;<a name="line.2099"></a> +<span class="sourceLineNo">2100</span> * }<a name="line.2100"></a> +<span class="sourceLineNo">2101</span> * }<a name="line.2101"></a> +<span class="sourceLineNo">2102</span> * }<a name="line.2102"></a> +<span class="sourceLineNo">2103</span> */<a name="line.2103"></a> +<span class="sourceLineNo">2104</span> try {<a name="line.2104"></a> +<span class="sourceLineNo">2105</span> byte[] cf = Bytes.toBytes(store.getColumnFamilyName());<a name="line.2105"></a> +<span class="sourceLineNo">2106</span> if (stores.get(cf) != store) {<a name="line.2106"></a> +<span class="sourceLineNo">2107</span> LOG.warn("Store " + store.getColumnFamilyName() + " on region " + this<a name="line.2107"></a> +<span class="sourceLineNo">2108</span> + " has been re-instantiated, cancel this compaction request. "<a name="line.2108"></a> +<span class="sourceLineNo">2109</span> + " It may be caused by the roll back of split transaction");<a name="line.2109"></a> +<span class="sourceLineNo">2110</span> return false;<a name="line.2110"></a> +<span class="sourceLineNo">2111</span> }<a name="line.2111"></a> +<span class="sourceLineNo">2112</span><a name="line.2112"></a> +<span class="sourceLineNo">2113</span> status = TaskMonitor.get().createStatus("Compacting " + store + " in " + this);<a name="line.2113"></a> +<span class="sourceLineNo">2114</span> if (this.closed.get()) {<a name="line.2114"></a> +<span class="sourceLineNo">2115</span> String msg = "Skipping compaction on " + this + " because closed";<a name="line.2115"></a> +<span class="sourceLineNo">2116</span> LOG.debug(msg);<a name="line.2116"></a> +<span class="sourceLineNo">2117</span> status.abort(msg);<a name="line.2117"></a> +<span class="sourceLineNo">2118</span> return false;<a name="line.2118"></a> +<span class="sourceLineNo">2119</span> }<a name="line.2119"></a> +<span class="sourceLineNo">2120</span>
<TRUNCATED>
