http://git-wip-us.apache.org/repos/asf/hbase-site/blob/df8fd1d3/devapidocs/src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.LocalityBasedCandidateGenerator.html ---------------------------------------------------------------------- diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.LocalityBasedCandidateGenerator.html b/devapidocs/src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.LocalityBasedCandidateGenerator.html index 233dba3..91b9055 100644 --- a/devapidocs/src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.LocalityBasedCandidateGenerator.html +++ b/devapidocs/src-html/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.LocalityBasedCandidateGenerator.html @@ -540,1205 +540,1204 @@ <span class="sourceLineNo">532</span> sm.getRegionMetrics().forEach((byte[] regionName, RegionMetrics rm) -> {<a name="line.532"></a> <span class="sourceLineNo">533</span> Deque<BalancerRegionLoad> rLoads = oldLoads.get(Bytes.toString(regionName));<a name="line.533"></a> <span class="sourceLineNo">534</span> if (rLoads == null) {<a name="line.534"></a> -<span class="sourceLineNo">535</span> // There was nothing there<a name="line.535"></a> -<span class="sourceLineNo">536</span> rLoads = new ArrayDeque<>();<a name="line.536"></a> -<span class="sourceLineNo">537</span> } else if (rLoads.size() >= numRegionLoadsToRemember) {<a name="line.537"></a> -<span class="sourceLineNo">538</span> rLoads.remove();<a name="line.538"></a> -<span class="sourceLineNo">539</span> }<a name="line.539"></a> -<span class="sourceLineNo">540</span> rLoads.add(new BalancerRegionLoad(rm));<a name="line.540"></a> -<span class="sourceLineNo">541</span> loads.put(Bytes.toString(regionName), rLoads);<a name="line.541"></a> -<span class="sourceLineNo">542</span> });<a name="line.542"></a> -<span class="sourceLineNo">543</span> });<a name="line.543"></a> -<span class="sourceLineNo">544</span><a name="line.544"></a> -<span class="sourceLineNo">545</span> for(CostFromRegionLoadFunction cost : regionLoadFunctions) {<a name="line.545"></a> -<span class="sourceLineNo">546</span> cost.setLoads(loads);<a name="line.546"></a> -<span class="sourceLineNo">547</span> }<a name="line.547"></a> -<span class="sourceLineNo">548</span> }<a name="line.548"></a> -<span class="sourceLineNo">549</span><a name="line.549"></a> -<span class="sourceLineNo">550</span> protected void initCosts(Cluster cluster) {<a name="line.550"></a> -<span class="sourceLineNo">551</span> for (CostFunction c:costFunctions) {<a name="line.551"></a> -<span class="sourceLineNo">552</span> c.init(cluster);<a name="line.552"></a> -<span class="sourceLineNo">553</span> }<a name="line.553"></a> -<span class="sourceLineNo">554</span> }<a name="line.554"></a> -<span class="sourceLineNo">555</span><a name="line.555"></a> -<span class="sourceLineNo">556</span> protected void updateCostsWithAction(Cluster cluster, Action action) {<a name="line.556"></a> -<span class="sourceLineNo">557</span> for (CostFunction c : costFunctions) {<a name="line.557"></a> -<span class="sourceLineNo">558</span> c.postAction(action);<a name="line.558"></a> -<span class="sourceLineNo">559</span> }<a name="line.559"></a> -<span class="sourceLineNo">560</span> }<a name="line.560"></a> -<span class="sourceLineNo">561</span><a name="line.561"></a> -<span class="sourceLineNo">562</span> /**<a name="line.562"></a> -<span class="sourceLineNo">563</span> * Get the names of the cost functions<a name="line.563"></a> -<span class="sourceLineNo">564</span> */<a name="line.564"></a> -<span class="sourceLineNo">565</span> public String[] getCostFunctionNames() {<a name="line.565"></a> -<span class="sourceLineNo">566</span> if (costFunctions == null) return null;<a name="line.566"></a> -<span class="sourceLineNo">567</span> String[] ret = new String[costFunctions.length];<a name="line.567"></a> -<span class="sourceLineNo">568</span> for (int i = 0; i < costFunctions.length; i++) {<a name="line.568"></a> -<span class="sourceLineNo">569</span> CostFunction c = costFunctions[i];<a name="line.569"></a> -<span class="sourceLineNo">570</span> ret[i] = c.getClass().getSimpleName();<a name="line.570"></a> -<span class="sourceLineNo">571</span> }<a name="line.571"></a> -<span class="sourceLineNo">572</span><a name="line.572"></a> -<span class="sourceLineNo">573</span> return ret;<a name="line.573"></a> -<span class="sourceLineNo">574</span> }<a name="line.574"></a> -<span class="sourceLineNo">575</span><a name="line.575"></a> -<span class="sourceLineNo">576</span> /**<a name="line.576"></a> -<span class="sourceLineNo">577</span> * This is the main cost function. 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class="sourceLineNo">635</span> }<a name="line.635"></a> -<span class="sourceLineNo">636</span> protected int pickRandomServer(Cluster cluster) {<a name="line.636"></a> -<span class="sourceLineNo">637</span> if (cluster.numServers < 1) {<a name="line.637"></a> -<span class="sourceLineNo">638</span> return -1;<a name="line.638"></a> -<span class="sourceLineNo">639</span> }<a name="line.639"></a> -<span class="sourceLineNo">640</span><a name="line.640"></a> -<span class="sourceLineNo">641</span> return RANDOM.nextInt(cluster.numServers);<a name="line.641"></a> -<span class="sourceLineNo">642</span> }<a name="line.642"></a> -<span class="sourceLineNo">643</span><a name="line.643"></a> -<span class="sourceLineNo">644</span> protected int pickRandomRack(Cluster cluster) {<a name="line.644"></a> -<span class="sourceLineNo">645</span> if (cluster.numRacks < 1) {<a name="line.645"></a> -<span class="sourceLineNo">646</span> return -1;<a name="line.646"></a> -<span 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-<span class="sourceLineNo">659</span> return otherServerIndex;<a name="line.659"></a> -<span class="sourceLineNo">660</span> }<a name="line.660"></a> -<span class="sourceLineNo">661</span> }<a name="line.661"></a> -<span class="sourceLineNo">662</span> }<a name="line.662"></a> -<span class="sourceLineNo">663</span><a name="line.663"></a> -<span class="sourceLineNo">664</span> protected int pickOtherRandomRack(Cluster cluster, int rackIndex) {<a name="line.664"></a> -<span class="sourceLineNo">665</span> if (cluster.numRacks < 2) {<a name="line.665"></a> -<span class="sourceLineNo">666</span> return -1;<a name="line.666"></a> -<span class="sourceLineNo">667</span> }<a name="line.667"></a> -<span class="sourceLineNo">668</span> while (true) {<a name="line.668"></a> -<span class="sourceLineNo">669</span> int otherRackIndex = pickRandomRack(cluster);<a name="line.669"></a> -<span class="sourceLineNo">670</span> if (otherRackIndex != rackIndex) {<a name="line.670"></a> -<span class="sourceLineNo">671</span> return otherRackIndex;<a name="line.671"></a> -<span class="sourceLineNo">672</span> }<a name="line.672"></a> -<span class="sourceLineNo">673</span> }<a name="line.673"></a> -<span class="sourceLineNo">674</span> }<a name="line.674"></a> -<span class="sourceLineNo">675</span><a name="line.675"></a> -<span class="sourceLineNo">676</span> protected Cluster.Action pickRandomRegions(Cluster cluster,<a name="line.676"></a> -<span class="sourceLineNo">677</span> int thisServer,<a name="line.677"></a> -<span class="sourceLineNo">678</span> int otherServer) {<a name="line.678"></a> -<span class="sourceLineNo">679</span> if (thisServer < 0 || otherServer < 0) {<a name="line.679"></a> -<span class="sourceLineNo">680</span> return Cluster.NullAction;<a name="line.680"></a> -<span class="sourceLineNo">681</span> }<a name="line.681"></a> -<span class="sourceLineNo">682</span><a name="line.682"></a> -<span class="sourceLineNo">683</span> // Decide who is most likely to need another region<a name="line.683"></a> -<span class="sourceLineNo">684</span> int thisRegionCount = cluster.getNumRegions(thisServer);<a name="line.684"></a> -<span class="sourceLineNo">685</span> int otherRegionCount = cluster.getNumRegions(otherServer);<a name="line.685"></a> -<span class="sourceLineNo">686</span><a name="line.686"></a> -<span class="sourceLineNo">687</span> // Assign the chance based upon the above<a name="line.687"></a> -<span class="sourceLineNo">688</span> double thisChance = (thisRegionCount > otherRegionCount) ? 0 : 0.5;<a name="line.688"></a> -<span class="sourceLineNo">689</span> double otherChance = (thisRegionCount <= otherRegionCount) ? 0 : 0.5;<a name="line.689"></a> -<span class="sourceLineNo">690</span><a name="line.690"></a> -<span class="sourceLineNo">691</span> int thisRegion = pickRandomRegion(cluster, thisServer, thisChance);<a name="line.691"></a> -<span class="sourceLineNo">692</span> int otherRegion = pickRandomRegion(cluster, otherServer, otherChance);<a name="line.692"></a> -<span class="sourceLineNo">693</span><a name="line.693"></a> -<span class="sourceLineNo">694</span> return getAction(thisServer, thisRegion, otherServer, otherRegion);<a name="line.694"></a> -<span class="sourceLineNo">695</span> }<a name="line.695"></a> -<span class="sourceLineNo">696</span><a name="line.696"></a> -<span class="sourceLineNo">697</span> protected Cluster.Action getAction(int fromServer, int fromRegion,<a name="line.697"></a> -<span class="sourceLineNo">698</span> int toServer, int toRegion) {<a name="line.698"></a> -<span class="sourceLineNo">699</span> if (fromServer < 0 || toServer < 0) {<a name="line.699"></a> -<span class="sourceLineNo">700</span> return Cluster.NullAction;<a name="line.700"></a> -<span class="sourceLineNo">701</span> }<a name="line.701"></a> -<span class="sourceLineNo">702</span> if (fromRegion > 0 && toRegion > 0) {<a name="line.702"></a> -<span class="sourceLineNo">703</span> return new 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thisServer, otherServer);<a name="line.737"></a> -<span class="sourceLineNo">738</span> }<a name="line.738"></a> -<span class="sourceLineNo">739</span> }<a name="line.739"></a> -<span class="sourceLineNo">740</span><a name="line.740"></a> -<span class="sourceLineNo">741</span> static class LoadCandidateGenerator extends CandidateGenerator {<a name="line.741"></a> -<span class="sourceLineNo">742</span><a name="line.742"></a> -<span class="sourceLineNo">743</span> @Override<a name="line.743"></a> -<span class="sourceLineNo">744</span> Cluster.Action generate(Cluster cluster) {<a name="line.744"></a> -<span class="sourceLineNo">745</span> cluster.sortServersByRegionCount();<a name="line.745"></a> -<span class="sourceLineNo">746</span> int thisServer = pickMostLoadedServer(cluster, -1);<a name="line.746"></a> -<span class="sourceLineNo">747</span> int otherServer = pickLeastLoadedServer(cluster, thisServer);<a name="line.747"></a> -<span class="sourceLineNo">748</span><a 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cluster.regionIndexToPrimaryIndex);<a name="line.951"></a> -<span class="sourceLineNo">952</span><a name="line.952"></a> -<span class="sourceLineNo">953</span> // if there are no pairs of region replicas co-hosted, default to random generator<a name="line.953"></a> -<span class="sourceLineNo">954</span> if (regionIndex == -1) {<a name="line.954"></a> -<span class="sourceLineNo">955</span> // default to randompicker<a name="line.955"></a> -<span class="sourceLineNo">956</span> return randomGenerator.generate(cluster);<a name="line.956"></a> -<span class="sourceLineNo">957</span> }<a name="line.957"></a> -<span class="sourceLineNo">958</span><a name="line.958"></a> -<span class="sourceLineNo">959</span> int serverIndex = cluster.regionIndexToServerIndex[regionIndex];<a name="line.959"></a> -<span class="sourceLineNo">960</span> int toRackIndex = pickOtherRandomRack(cluster, rackIndex);<a name="line.960"></a> -<span class="sourceLineNo">961</span><a name="line.961"></a> -<span 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<TRUNCATED>
