http://git-wip-us.apache.org/repos/asf/hbase-site/blob/80652933/devapidocs/src-html/org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.Cluster.LocalityType.html ---------------------------------------------------------------------- diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.Cluster.LocalityType.html b/devapidocs/src-html/org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.Cluster.LocalityType.html index af3b364..d974429 100644 --- a/devapidocs/src-html/org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.Cluster.LocalityType.html +++ b/devapidocs/src-html/org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.Cluster.LocalityType.html @@ -749,869 +749,894 @@ <span class="sourceLineNo">741</span> int region = regionsToIndex.get(regionInfo);<a name="line.741"></a> <span class="sourceLineNo">742</span><a name="line.742"></a> <span class="sourceLineNo">743</span> int primary = regionIndexToPrimaryIndex[region];<a name="line.743"></a> -<span class="sourceLineNo">744</span><a name="line.744"></a> -<span class="sourceLineNo">745</span> // there is a subset relation for server < host < rack<a name="line.745"></a> -<span class="sourceLineNo">746</span> // check server first<a name="line.746"></a> -<span class="sourceLineNo">747</span><a name="line.747"></a> -<span class="sourceLineNo">748</span> if (contains(primariesOfRegionsPerServer[server], primary)) {<a name="line.748"></a> -<span class="sourceLineNo">749</span> // check for whether there are other servers that we can place this region<a name="line.749"></a> -<span class="sourceLineNo">750</span> for (int i = 0; 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i < primariesOfRegionsPerHost.length; i++) {<a name="line.763"></a> -<span class="sourceLineNo">764</span> if (i != host && !contains(primariesOfRegionsPerHost[i], primary)) {<a name="line.764"></a> -<span class="sourceLineNo">765</span> return true; // meaning there is a better host<a name="line.765"></a> -<span class="sourceLineNo">766</span> }<a name="line.766"></a> -<span class="sourceLineNo">767</span> }<a name="line.767"></a> -<span class="sourceLineNo">768</span> return false; // there is not a better host to place this<a name="line.768"></a> -<span class="sourceLineNo">769</span> }<a name="line.769"></a> -<span class="sourceLineNo">770</span> }<a name="line.770"></a> -<span class="sourceLineNo">771</span><a name="line.771"></a> -<span class="sourceLineNo">772</span> // check rack<a name="line.772"></a> -<span class="sourceLineNo">773</span> if (numRacks > 1) {<a name="line.773"></a> -<span class="sourceLineNo">774</span> int rack = serverIndexToRackIndex[server];<a name="line.774"></a> -<span class="sourceLineNo">775</span> if (contains(primariesOfRegionsPerRack[rack], primary)) {<a name="line.775"></a> -<span class="sourceLineNo">776</span> // check for whether there are other racks that we can place this region<a name="line.776"></a> -<span class="sourceLineNo">777</span> for (int i = 0; i < primariesOfRegionsPerRack.length; i++) {<a name="line.777"></a> -<span class="sourceLineNo">778</span> if (i != rack && !contains(primariesOfRegionsPerRack[i], primary)) {<a name="line.778"></a> -<span class="sourceLineNo">779</span> return true; // meaning there is a better rack<a name="line.779"></a> -<span class="sourceLineNo">780</span> }<a name="line.780"></a> -<span class="sourceLineNo">781</span> }<a name="line.781"></a> -<span class="sourceLineNo">782</span> return false; // there is not a better rack to place this<a name="line.782"></a> -<span class="sourceLineNo">783</span> }<a name="line.783"></a> -<span class="sourceLineNo">784</span> }<a name="line.784"></a> -<span class="sourceLineNo">785</span> return false;<a name="line.785"></a> -<span class="sourceLineNo">786</span> }<a name="line.786"></a> -<span class="sourceLineNo">787</span><a name="line.787"></a> -<span class="sourceLineNo">788</span> void doAssignRegion(RegionInfo regionInfo, ServerName serverName) {<a name="line.788"></a> -<span class="sourceLineNo">789</span> if (!serversToIndex.containsKey(serverName.getHostAndPort())) {<a name="line.789"></a> -<span class="sourceLineNo">790</span> return;<a name="line.790"></a> -<span class="sourceLineNo">791</span> }<a name="line.791"></a> -<span class="sourceLineNo">792</span> int server = serversToIndex.get(serverName.getHostAndPort());<a name="line.792"></a> -<span class="sourceLineNo">793</span> int region = regionsToIndex.get(regionInfo);<a name="line.793"></a> -<span class="sourceLineNo">794</span> doAction(new AssignRegionAction(region, server));<a name="line.794"></a> -<span class="sourceLineNo">795</span> }<a name="line.795"></a> -<span class="sourceLineNo">796</span><a name="line.796"></a> -<span class="sourceLineNo">797</span> void regionMoved(int region, int oldServer, int newServer) {<a name="line.797"></a> -<span class="sourceLineNo">798</span> regionIndexToServerIndex[region] = newServer;<a name="line.798"></a> -<span class="sourceLineNo">799</span> if (initialRegionIndexToServerIndex[region] == newServer) {<a name="line.799"></a> -<span class="sourceLineNo">800</span> numMovedRegions--; 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// will still be sorted<a name="line.858"></a> -<span class="sourceLineNo">859</span> }<a name="line.859"></a> -<span class="sourceLineNo">860</span> }<a name="line.860"></a> -<span class="sourceLineNo">861</span> }<a name="line.861"></a> -<span class="sourceLineNo">862</span> }<a name="line.862"></a> -<span class="sourceLineNo">863</span><a name="line.863"></a> -<span class="sourceLineNo">864</span> int[] removeRegion(int[] regions, int regionIndex) {<a name="line.864"></a> -<span class="sourceLineNo">865</span> //TODO: this maybe costly. 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class="sourceLineNo">877</span><a name="line.877"></a> -<span class="sourceLineNo">878</span> int[] addRegion(int[] regions, int regionIndex) {<a name="line.878"></a> -<span class="sourceLineNo">879</span> int[] newRegions = new int[regions.length + 1];<a name="line.879"></a> -<span class="sourceLineNo">880</span> System.arraycopy(regions, 0, newRegions, 0, regions.length);<a name="line.880"></a> -<span class="sourceLineNo">881</span> newRegions[newRegions.length - 1] = regionIndex;<a name="line.881"></a> -<span class="sourceLineNo">882</span> return newRegions;<a name="line.882"></a> -<span class="sourceLineNo">883</span> }<a name="line.883"></a> -<span class="sourceLineNo">884</span><a name="line.884"></a> -<span class="sourceLineNo">885</span> int[] addRegionSorted(int[] regions, int regionIndex) {<a name="line.885"></a> -<span class="sourceLineNo">886</span> int[] newRegions = new int[regions.length + 1];<a name="line.886"></a> -<span class="sourceLineNo">887</span> int i = 0;<a 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name="line.898"></a> -<span class="sourceLineNo">899</span><a name="line.899"></a> -<span class="sourceLineNo">900</span> int[] replaceRegion(int[] regions, int regionIndex, int newRegionIndex) {<a name="line.900"></a> -<span class="sourceLineNo">901</span> int i = 0;<a name="line.901"></a> -<span class="sourceLineNo">902</span> for (i = 0; i < regions.length; i++) {<a name="line.902"></a> -<span class="sourceLineNo">903</span> if (regions[i] == regionIndex) {<a name="line.903"></a> -<span class="sourceLineNo">904</span> regions[i] = newRegionIndex;<a name="line.904"></a> -<span class="sourceLineNo">905</span> break;<a name="line.905"></a> -<span class="sourceLineNo">906</span> }<a name="line.906"></a> -<span class="sourceLineNo">907</span> }<a name="line.907"></a> -<span class="sourceLineNo">908</span> return regions;<a name="line.908"></a> -<span class="sourceLineNo">909</span> }<a name="line.909"></a> -<span class="sourceLineNo">910</span><a name="line.910"></a> -<span 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class="sourceLineNo">933</span> for (int j = 0; j < regionsPerServer[serverIndex].length; j++) {<a name="line.933"></a> -<span class="sourceLineNo">934</span> int regionIndex = regionsPerServer[serverIndex][j];<a name="line.934"></a> -<span class="sourceLineNo">935</span> HDFSBlocksDistribution distribution = regionFinder<a name="line.935"></a> -<span class="sourceLineNo">936</span> .getBlockDistribution(regions[regionIndex]);<a name="line.936"></a> -<span class="sourceLineNo">937</span> float locality = distribution.getBlockLocalityIndex(servers[serverIndex].getHostname());<a name="line.937"></a> -<span class="sourceLineNo">938</span> // skip empty region<a name="line.938"></a> -<span class="sourceLineNo">939</span> if (distribution.getUniqueBlocksTotalWeight() == 0) {<a name="line.939"></a> -<span class="sourceLineNo">940</span> continue;<a name="line.940"></a> -<span class="sourceLineNo">941</span> }<a name="line.941"></a> -<span class="sourceLineNo">942</span> if (locality < 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serversByLoad.firstKey().getLoad());<a name="line.1194"></a> -<span class="sourceLineNo">1195</span> }<a name="line.1195"></a> -<span class="sourceLineNo">1196</span> return false;<a name="line.1196"></a> -<span class="sourceLineNo">1197</span> }<a name="line.1197"></a> -<span class="sourceLineNo">1198</span> return true;<a name="line.1198"></a> -<span class="sourceLineNo">1199</span> }<a name="line.1199"></a> -<span class="sourceLineNo">1200</span><a name="line.1200"></a> -<span class="sourceLineNo">1201</span> /**<a name="line.1201"></a> -<span class="sourceLineNo">1202</span> * Subclasses should implement this to return true if the cluster has nodes that hosts<a name="line.1202"></a> -<span class="sourceLineNo">1203</span> * multiple replicas for the same region, or, if there are multiple racks and the same<a name="line.1203"></a> -<span class="sourceLineNo">1204</span> * rack hosts replicas of the same region<a name="line.1204"></a> -<span class="sourceLineNo">1205</span> * @param 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i < primariesOfRegionsPerServer.length; i++) {<a name="line.749"></a> +<span class="sourceLineNo">750</span> if (i != server && !contains(primariesOfRegionsPerServer[i], primary)) {<a name="line.750"></a> +<span class="sourceLineNo">751</span> return true; // meaning there is a better server<a name="line.751"></a> +<span class="sourceLineNo">752</span> }<a name="line.752"></a> +<span class="sourceLineNo">753</span> }<a name="line.753"></a> +<span class="sourceLineNo">754</span> return false; // there is not a better server to place this<a name="line.754"></a> +<span class="sourceLineNo">755</span> }<a name="line.755"></a> +<span class="sourceLineNo">756</span><a name="line.756"></a> +<span class="sourceLineNo">757</span> // check host<a name="line.757"></a> +<span class="sourceLineNo">758</span> if (multiServersPerHost) { // these arrays would only be allocated if we have more than one server per host<a name="line.758"></a> +<span class="sourceLineNo">759</span> int host = serverIndexToHostIndex[server];<a name="line.759"></a> +<span class="sourceLineNo">760</span> if (contains(primariesOfRegionsPerHost[host], primary)) {<a name="line.760"></a> +<span class="sourceLineNo">761</span> // check for whether there are other hosts that we can place this region<a name="line.761"></a> +<span class="sourceLineNo">762</span> for (int i = 0; i < primariesOfRegionsPerHost.length; i++) {<a name="line.762"></a> +<span class="sourceLineNo">763</span> if (i != host && !contains(primariesOfRegionsPerHost[i], primary)) {<a name="line.763"></a> +<span class="sourceLineNo">764</span> return true; // meaning there is a better host<a name="line.764"></a> +<span class="sourceLineNo">765</span> }<a name="line.765"></a> +<span class="sourceLineNo">766</span> }<a name="line.766"></a> +<span class="sourceLineNo">767</span> return false; // there is not a better host to place this<a name="line.767"></a> +<span class="sourceLineNo">768</span> }<a name="line.768"></a> +<span class="sourceLineNo">769</span> }<a name="line.769"></a> +<span class="sourceLineNo">770</span><a name="line.770"></a> +<span class="sourceLineNo">771</span> // check rack<a name="line.771"></a> +<span class="sourceLineNo">772</span> if (numRacks > 1) {<a name="line.772"></a> +<span class="sourceLineNo">773</span> int rack = serverIndexToRackIndex[server];<a name="line.773"></a> +<span class="sourceLineNo">774</span> if (contains(primariesOfRegionsPerRack[rack], primary)) {<a name="line.774"></a> +<span class="sourceLineNo">775</span> // check for whether there are other racks that we can place this region<a name="line.775"></a> +<span class="sourceLineNo">776</span> for (int i = 0; i < primariesOfRegionsPerRack.length; i++) {<a name="line.776"></a> +<span class="sourceLineNo">777</span> if (i != rack && !contains(primariesOfRegionsPerRack[i], primary)) {<a name="line.777"></a> +<span class="sourceLineNo">778</span> return true; // meaning there is a better rack<a name="line.778"></a> +<span class="sourceLineNo">779</span> }<a name="line.779"></a> +<span class="sourceLineNo">780</span> }<a name="line.780"></a> +<span class="sourceLineNo">781</span> return false; // there is not a better rack to place this<a name="line.781"></a> +<span class="sourceLineNo">782</span> }<a name="line.782"></a> +<span class="sourceLineNo">783</span> }<a name="line.783"></a> +<span class="sourceLineNo">784</span> return false;<a name="line.784"></a> +<span class="sourceLineNo">785</span> }<a name="line.785"></a> +<span class="sourceLineNo">786</span><a name="line.786"></a> +<span class="sourceLineNo">787</span> void doAssignRegion(RegionInfo regionInfo, ServerName serverName) {<a name="line.787"></a> +<span class="sourceLineNo">788</span> if (!serversToIndex.containsKey(serverName.getHostAndPort())) {<a name="line.788"></a> +<span class="sourceLineNo">789</span> return;<a name="line.789"></a> +<span class="sourceLineNo">790</span> }<a name="line.790"></a> +<span class="sourceLineNo">791</span> int server = serversToIndex.get(serverName.getHostAndPort());<a name="line.791"></a> +<span class="sourceLineNo">792</span> int region = regionsToIndex.get(regionInfo);<a name="line.792"></a> +<span class="sourceLineNo">793</span> doAction(new AssignRegionAction(region, server));<a name="line.793"></a> +<span class="sourceLineNo">794</span> }<a name="line.794"></a> +<span class="sourceLineNo">795</span><a name="line.795"></a> +<span class="sourceLineNo">796</span> void regionMoved(int region, int oldServer, int newServer) {<a name="line.796"></a> +<span class="sourceLineNo">797</span> regionIndexToServerIndex[region] = newServer;<a name="line.797"></a> +<span class="sourceLineNo">798</span> if (initialRegionIndexToServerIndex[region] == newServer) {<a name="line.798"></a> +<span class="sourceLineNo">799</span> numMovedRegions--; //region moved back to original location<a name="line.799"></a> +<span class="sourceLineNo">800</span> } else if (oldServer >= 0 && initialRegionIndexToServerIndex[region] == oldServer) {<a name="line.800"></a> +<span class="sourceLineNo">801</span> numMovedRegions++; //region moved from original location<a name="line.801"></a> +<span class="sourceLineNo">802</span> }<a name="line.802"></a> +<span class="sourceLineNo">803</span> int tableIndex = regionIndexToTableIndex[region];<a name="line.803"></a> +<span class="sourceLineNo">804</span> if (oldServer >= 0) {<a name="line.804"></a> +<span class="sourceLineNo">805</span> numRegionsPerServerPerTable[oldServer][tableIndex]--;<a name="line.805"></a> +<span class="sourceLineNo">806</span> }<a name="line.806"></a> +<span class="sourceLineNo">807</span> numRegionsPerServerPerTable[newServer][tableIndex]++;<a name="line.807"></a> +<span class="sourceLineNo">808</span><a name="line.808"></a> +<span class="sourceLineNo">809</span> //check whether this caused maxRegionsPerTable in the new Server to be updated<a name="line.809"></a> +<span class="sourceLineNo">810</span> if (numRegionsPerServerPerTable[newServer][tableIndex] > numMaxRegionsPerTable[tableIndex]) {<a name="line.810"></a> +<span class="sourceLineNo">811</span> numMaxRegionsPerTable[tableIndex] = numRegionsPerServerPerTable[newServer][tableIndex];<a name="line.811"></a> +<span class="sourceLineNo">812</span> } else if (oldServer >= 0 && (numRegionsPerServerPerTable[oldServer][tableIndex] + 1)<a name="line.812"></a> +<span class="sourceLineNo">813</span> == numMaxRegionsPerTable[tableIndex]) {<a name="line.813"></a> +<span class="sourceLineNo">814</span> //recompute maxRegionsPerTable since the previous value was coming from the old server<a name="line.814"></a> +<span class="sourceLineNo">815</span> numMaxRegionsPerTable[tableIndex] = 0;<a name="line.815"></a> +<span class="sourceLineNo">816</span> for (int[] aNumRegionsPerServerPerTable : numRegionsPerServerPerTable) {<a name="line.816"></a> +<span class="sourceLineNo">817</span> if (aNumRegionsPerServerPerTable[tableIndex] > numMaxRegionsPerTable[tableIndex]) {<a name="line.817"></a> +<span class="sourceLineNo">818</span> numMaxRegionsPerTable[tableIndex] = aNumRegionsPerServerPerTable[tableIndex];<a name="line.818"></a> +<span class="sourceLineNo">819</span> }<a name="line.819"></a> +<span class="sourceLineNo">820</span> }<a name="line.820"></a> +<span class="sourceLineNo">821</span> }<a name="line.821"></a> +<span class="sourceLineNo">822</span><a name="line.822"></a> +<span class="sourceLineNo">823</span> // update for servers<a name="line.823"></a> +<span class="sourceLineNo">824</span> int primary = regionIndexToPrimaryIndex[region];<a name="line.824"></a> +<span class="sourceLineNo">825</span> if (oldServer >= 0) {<a name="line.825"></a> +<span class="sourceLineNo">826</span> primariesOfRegionsPerServer[oldServer] = removeRegion(<a name="line.826"></a> +<span class="sourceLineNo">827</span> primariesOfRegionsPerServer[oldServer], primary);<a name="line.827"></a> +<span class="sourceLineNo">828</span> }<a name="line.828"></a> +<span class="sourceLineNo">829</span> primariesOfRegionsPerServer[newServer] = addRegionSorted(<a name="line.829"></a> +<span class="sourceLineNo">830</span> primariesOfRegionsPerServer[newServer], primary);<a name="line.830"></a> +<span class="sourceLineNo">831</span><a name="line.831"></a> +<span class="sourceLineNo">832</span> // update for hosts<a name="line.832"></a> +<span class="sourceLineNo">833</span> if (multiServersPerHost) {<a name="line.833"></a> +<span class="sourceLineNo">834</span> int oldHost = oldServer >= 0 ? serverIndexToHostIndex[oldServer] : -1;<a name="line.834"></a> +<span class="sourceLineNo">835</span> int newHost = serverIndexToHostIndex[newServer];<a name="line.835"></a> +<span class="sourceLineNo">836</span> if (newHost != oldHost) {<a name="line.836"></a> +<span class="sourceLineNo">837</span> regionsPerHost[newHost] = addRegion(regionsPerHost[newHost], region);<a name="line.837"></a> +<span class="sourceLineNo">838</span> primariesOfRegionsPerHost[newHost] = addRegionSorted(primariesOfRegionsPerHost[newHost], primary);<a name="line.838"></a> +<span class="sourceLineNo">839</span> if (oldHost >= 0) {<a name="line.839"></a> +<span class="sourceLineNo">840</span> regionsPerHost[oldHost] = removeRegion(regionsPerHost[oldHost], region);<a name="line.840"></a> +<span class="sourceLineNo">841</span> primariesOfRegionsPerHost[oldHost] = removeRegion(<a name="line.841"></a> +<span class="sourceLineNo">842</span> primariesOfRegionsPerHost[oldHost], primary); // will still be sorted<a name="line.842"></a> +<span class="sourceLineNo">843</span> }<a name="line.843"></a> +<span class="sourceLineNo">844</span> }<a name="line.844"></a> +<span class="sourceLineNo">845</span> }<a name="line.845"></a> +<span class="sourceLineNo">846</span><a name="line.846"></a> +<span class="sourceLineNo">847</span> // update for racks<a name="line.847"></a> +<span class="sourceLineNo">848</span> if (numRacks > 1) {<a name="line.848"></a> +<span class="sourceLineNo">849</span> int oldRack = oldServer >= 0 ? serverIndexToRackIndex[oldServer] : -1;<a name="line.849"></a> +<span class="sourceLineNo">850</span> int newRack = serverIndexToRackIndex[newServer];<a name="line.850"></a> +<span class="sourceLineNo">851</span> if (newRack != oldRack) {<a name="line.851"></a> +<span class="sourceLineNo">852</span> regionsPerRack[newRack] = addRegion(regionsPerRack[newRack], region);<a name="line.852"></a> +<span class="sourceLineNo">853</span> primariesOfRegionsPerRack[newRack] = addRegionSorted(primariesOfRegionsPerRack[newRack], primary);<a name="line.853"></a> +<span class="sourceLineNo">854</span> if (oldRack >= 0) {<a name="line.854"></a> +<span class="sourceLineNo">855</span> regionsPerRack[oldRack] = removeRegion(regionsPerRack[oldRack], region);<a name="line.855"></a> +<span class="sourceLineNo">856</span> primariesOfRegionsPerRack[oldRack] = removeRegion(<a name="line.856"></a> +<span class="sourceLineNo">857</span> primariesOfRegionsPerRack[oldRack], primary); // will still be sorted<a name="line.857"></a> +<span class="sourceLineNo">858</span> }<a name="line.858"></a> +<span class="sourceLineNo">859</span> }<a name="line.859"></a> +<span class="sourceLineNo">860</span> }<a name="line.860"></a> +<span class="sourceLineNo">861</span> }<a name="line.861"></a> +<span class="sourceLineNo">862</span><a name="line.862"></a> +<span class="sourceLineNo">863</span> int[] removeRegion(int[] regions, int regionIndex) {<a name="line.863"></a> +<span class="sourceLineNo">864</span> //TODO: this maybe costly. Consider using linked lists<a name="line.864"></a> +<span class="sourceLineNo">865</span> int[] newRegions = new int[regions.length - 1];<a name="line.865"></a> +<span class="sourceLineNo">866</span> int i = 0;<a name="line.866"></a> +<span class="sourceLineNo">867</span> for (i = 0; i < regions.length; i++) {<a name="line.867"></a> +<span class="sourceLineNo">868</span> if (regions[i] == regionIndex) {<a name="line.868"></a> +<span class="sourceLineNo">869</span> break;<a name="line.869"></a> +<span class="sourceLineNo">870</span> }<a name="line.870"></a> +<span class="sourceLineNo">871</span> newRegions[i] = regions[i];<a name="line.871"></a> +<span class="sourceLineNo">872</span> }<a name="line.872"></a> +<span class="sourceLineNo">873</span> System.arraycopy(regions, i+1, newRegions, i, newRegions.length - i);<a name="line.873"></a> +<span class="sourceLineNo">874</span> return newRegions;<a name="line.874"></a> +<span class="sourceLineNo">875</span> }<a name="line.875"></a> +<span class="sourceLineNo">876</span><a name="line.876"></a> +<span class="sourceLineNo">877</span> int[] addRegion(int[] regions, int regionIndex) {<a name="line.877"></a> +<span class="sourceLineNo">878</span> int[] newRegions = new int[regions.length + 1];<a name="line.878"></a> +<span class="sourceLineNo">879</span> System.arraycopy(regions, 0, newRegions, 0, regions.length);<a name="line.879"></a> +<span class="sourceLineNo">880</span> newRegions[newRegions.length - 1] = regionIndex;<a name="line.880"></a> +<span class="sourceLineNo">881</span> return newRegions;<a name="line.881"></a> +<span class="sourceLineNo">882</span> }<a name="line.882"></a> +<span class="sourceLineNo">883</span><a name="line.883"></a> +<span class="sourceLineNo">884</span> int[] addRegionSorted(int[] regions, int regionIndex) {<a name="line.884"></a> +<span class="sourceLineNo">885</span> int[] newRegions = new int[regions.length + 1];<a name="line.885"></a> +<span class="sourceLineNo">886</span> int i = 0;<a name="line.886"></a> +<span class="sourceLineNo">887</span> for (i = 0; i < regions.length; i++) { // find the index to insert<a name="line.887"></a> +<span class="sourceLineNo">888</span> if (regions[i] > regionIndex) {<a name="line.888"></a> +<span class="sourceLineNo">889</span> break;<a name="line.889"></a> +<span class="sourceLineNo">890</span> }<a name="line.890"></a> +<span class="sourceLineNo">891</span> }<a name="line.891"></a> +<span class="sourceLineNo">892</span> System.arraycopy(regions, 0, newRegions, 0, i); // copy first half<a name="line.892"></a> +<span class="sourceLineNo">893</span> System.arraycopy(regions, i, newRegions, i+1, regions.length - i); // copy second half<a name="line.893"></a> +<span class="sourceLineNo">894</span> newRegions[i] = regionIndex;<a name="line.894"></a> +<span class="sourceLineNo">895</span><a name="line.895"></a> +<span class="sourceLineNo">896</span> return newRegions;<a name="line.896"></a> +<span class="sourceLineNo">897</span> }<a name="line.897"></a> +<span class="sourceLineNo">898</span><a name="line.898"></a> +<span class="sourceLineNo">899</span> int[] replaceRegion(int[] regions, int regionIndex, int newRegionIndex) {<a name="line.899"></a> +<span class="sourceLineNo">900</span> int i = 0;<a name="line.900"></a> +<span class="sourceLineNo">901</span> for (i = 0; i < regions.length; i++) {<a name="line.901"></a> +<span class="sourceLineNo">902</span> if (regions[i] == regionIndex) {<a name="line.902"></a> +<span class="sourceLineNo">903</span> regions[i] = newRegionIndex;<a name="line.903"></a> +<span class="sourceLineNo">904</span> break;<a name="line.904"></a> +<span class="sourceLineNo">905</span> }<a name="line.905"></a> +<span class="sourceLineNo">906</span> }<a name="line.906"></a> +<span class="sourceLineNo">907</span> return regions;<a name="line.907"></a> +<span class="sourceLineNo">908</span> }<a name="line.908"></a> +<span class="sourceLineNo">909</span><a name="line.909"></a> +<span class="sourceLineNo">910</span> void sortServersByRegionCount() {<a name="line.910"></a> +<span class="sourceLineNo">911</span> Arrays.sort(serverIndicesSortedByRegionCount, numRegionsComparator);<a name="line.911"></a> +<span class="sourceLineNo">912</span> }<a name="line.912"></a> +<span class="sourceLineNo">913</span><a name="line.913"></a> +<span class="sourceLineNo">914</span> int getNumRegions(int server) {<a name="line.914"></a> +<span class="sourceLineNo">915</span> return regionsPerServer[server].length;<a name="line.915"></a> +<span class="sourceLineNo">916</span> }<a name="line.916"></a> +<span class="sourceLineNo">917</span><a name="line.917"></a> +<span class="sourceLineNo">918</span> boolean contains(int[] arr, int val) {<a name="line.918"></a> +<span class="sourceLineNo">919</span> return Arrays.binarySearch(arr, val) >= 0;<a name="line.919"></a> +<span class="sourceLineNo">920</span> }<a name="line.920"></a> +<span class="sourceLineNo">921</span><a name="line.921"></a> +<span class="sourceLineNo">922</span> private Comparator<Integer> numRegionsComparator = Comparator.comparingInt(this::getNumRegions);<a name="line.922"></a> +<span class="sourceLineNo">923</span><a name="line.923"></a> +<span class="sourceLineNo">924</span> int getLowestLocalityRegionOnServer(int serverIndex) {<a name="line.924"></a> +<span class="sourceLineNo">925</span> if (regionFinder != null) {<a name="line.925"></a> +<span class="sourceLineNo">926</span> float lowestLocality = 1.0f;<a name="line.926"></a> +<span class="sourceLineNo">927</span> int lowestLocalityRegionIndex = -1;<a name="line.927"></a> +<span class="sourceLineNo">928</span> if (regionsPerServer[serverIndex].length == 0) {<a name="line.928"></a> +<span class="sourceLineNo">929</span> // No regions on that region server<a name="line.929"></a> +<span class="sourceLineNo">930</span> return -1;<a name="line.930"></a> +<span class="sourceLineNo">931</span> }<a name="line.931"></a> +<span class="sourceLineNo">932</span> for (int j = 0; j < regionsPerServer[serverIndex].length; j++) {<a name="line.932"></a> +<span class="sourceLineNo">933</span> int regionIndex = regionsPerServer[serverIndex][j];<a name="line.933"></a> +<span class="sourceLineNo">934</span> HDFSBlocksDistribution distribution = regionFinder<a name="line.934"></a> +<span class="sourceLineNo">935</span> .getBlockDistribution(regions[regionIndex]);<a name="line.935"></a> +<span class="sourceLineNo">936</span> float locality = distribution.getBlockLocalityIndex(servers[serverIndex].getHostname());<a name="line.936"></a> +<span class="sourceLineNo">937</span> // skip empty region<a name="line.937"></a> +<span class="sourceLineNo">938</span> if (distribution.getUniqueBlocksTotalWeight() == 0) {<a name="line.938"></a> +<span class="sourceLineNo">939</span> continue;<a name="line.939"></a> +<span class="sourceLineNo">940</span> }<a name="line.940"></a> +<span class="sourceLineNo">941</span> if (locality < lowestLocality) {<a name="line.941"></a> +<span class="sourceLineNo">942</span> lowestLocality = locality;<a name="line.942"></a> +<span class="sourceLineNo">943</span> lowestLocalityRegionIndex = j;<a name="line.943"></a> +<span class="sourceLineNo">944</span> }<a name="line.944"></a> +<span class="sourceLineNo">945</span> }<a name="line.945"></a> +<span class="sourceLineNo">946</span> if (lowestLocalityRegionIndex == -1) {<a name="line.946"></a> +<span class="sourceLineNo">947</span> return -1;<a name="line.947"></a> +<span class="sourceLineNo">948</span> }<a name="line.948"></a> +<span class="sourceLineNo">949</span> if (LOG.isTraceEnabled()) {<a name="line.949"></a> +<span class="sourceLineNo">950</span> LOG.trace("Lowest locality region is "<a name="line.950"></a> +<span class="sourceLineNo">951</span> + regions[regionsPerServer[serverIndex][lowestLocalityRegionIndex]]<a name="line.951"></a> +<span class="sourceLineNo">952</span> .getRegionNameAsString() + " with locality " + lowestLocality<a name="line.952"></a> +<span class="sourceLineNo">953</span> + " and its region server contains " + regionsPerServer[serverIndex].length<a name="line.953"></a> +<span class="sourceLineNo">954</span> + " regions");<a name="line.954"></a> +<span class="sourceLineNo">955</span> }<a name="line.955"></a> +<span class="sourceLineNo">956</span> return regionsPerServer[serverIndex][lowestLocalityRegionIndex];<a name="line.956"></a> +<span class="sourceLineNo">957</span> } else {<a name="line.957"></a> +<span class="sourceLineNo">958</span> return -1;<a name="line.958"></a> +<span class="sourceLineNo">959</span> }<a name="line.959"></a> +<span class="sourceLineNo">960</span> }<a name="line.960"></a> +<span class="sourceLineNo">961</span><a name="line.961"></a> +<span class="sourceLineNo">962</span> float getLocalityOfRegion(int region, int server) {<a name="line.962"></a> +<span class="sourceLineNo">963</span> if (regionFinder != null) {<a name="line.963"></a> +<span class="sourceLineNo">964</span> HDFSBlocksDistribution distribution = regionFinder.getBlockDistribution(regions[region]);<a name="line.964"></a> +<span class="sourceLineNo">965</span> return distribution.getBlockLocalityIndex(servers[server].getHostname());<a name="line.965"></a> +<span class="sourceLineNo">966</span> } else {<a name="line.966"></a> +<span class="sourceLineNo">967</span> return 0f;<a name="line.967"></a> +<span class="sourceLineNo">968</span> }<a name="line.968"></a> +<span class="sourceLineNo">969</span> }<a name="line.969"></a> +<span class="sourceLineNo">970</span><a name="line.970"></a> +<span class="sourceLineNo">971</span> @VisibleForTesting<a name="line.971"></a> +<span class="sourceLineNo">972</span> protected void setNumRegions(int numRegions) {<a name="line.972"></a> +<span class="sourceLineNo">973</span> this.numRegions = numRegions;<a name="line.973"></a> +<span class="sourceLineNo">974</span> }<a name="line.974"></a> +<span class="sourceLineNo">975</span><a name="line.975"></a> +<span class="sourceLineNo">976</span> @VisibleForTesting<a name="line.976"></a> +<span class="sourceLineNo">977</span> protected void setNumMovedRegions(int numMovedRegions) {<a name="line.977"></a> +<span class="sourceLineNo">978</span> this.numMovedRegions = numMovedRegions;<a name="line.978"></a> +<span class="sourceLineNo">979</span> }<a name="line.979"></a> +<span class="sourceLineNo">980</span><a name="line.980"></a> +<span class="sourceLineNo">981</span> @edu.umd.cs.findbugs.annotations.SuppressWarnings(value="SBSC_USE_STRINGBUFFER_CONCATENATION",<a name="line.981"></a> +<span class="sourceLineNo">982</span> justification="Not important but should be fixed")<a name="line.982"></a> +<span class="sourceLineNo">983</span> @Override<a name="line.983"></a> +<span class="sourceLineNo">984</span> public String toString() {<a name="line.984"></a> +<span class="sourceLineNo">985</span> StringBuilder desc = new StringBuilder("Cluster={servers=[");<a name="line.985"></a> +<span class="sourceLineNo">986</span> for(ServerName sn:servers) {<a name="line.986"></a> +<span class="sourceLineNo">987</span> desc.append(sn.getHostAndPort()).append(", ");<a name="line.987"></a> +<span class="sourceLineNo">988</span> }<a name="line.988"></a> +<span class="sourceLineNo">989</span> desc.append("], serverIndicesSortedByRegionCount=")<a name="line.989"></a> +<span class="sourceLineNo">990</span> .append(Arrays.toString(serverIndicesSortedByRegionCount))<a name="line.990"></a> +<span class="sourceLineNo">991</span> .append(", regionsPerServer=").append(Arrays.deepToString(regionsPerServer));<a name="line.991"></a> +<span class="sourceLineNo">992</span><a name="line.992"></a> +<span class="sourceLineNo">993</span> desc.append(", numMaxRegionsPerTable=").append(Arrays.toString(numMaxRegionsPerTable))<a name="line.993"></a> +<span class="sourceLineNo">994</span> .append(", numRegions=").append(numRegions).append(", numServers=").append(numServers)<a name="line.994"></a> +<span class="sourceLineNo">995</span> .append(", numTables=").append(numTables).append(", numMovedRegions=")<a name="line.995"></a> +<span class="sourceLineNo">996</span> .append(numMovedRegions).append('}');<a name="line.996"></a> +<span class="sourceLineNo">997</span> return desc.toString();<a name="line.997"></a> +<span class="sourceLineNo">998</span> }<a name="line.998"></a> +<span class="sourceLineNo">999</span> }<a name="line.999"></a> +<span class="sourceLineNo">1000</span><a name="line.1000"></a> +<span class="sourceLineNo">1001</span> // slop for regions<a name="line.1001"></a> +<span class="sourceLineNo">1002</span> protected float slop;<a name="line.1002"></a> +<span class="sourceLineNo">1003</span> // overallSlop to control simpleLoadBalancer's cluster level threshold<a name="line.1003"></a> +<span class="sourceLineNo">1004</span> protected float overallSlop;<a name="line.1004"></a> +<span class="sourceLineNo">1005</span> protected Configuration config = HBaseConfiguration.create();<a name="line.1005"></a> +<span class="sourceLineNo">1006</span> protected RackManager rackManager;<a name="line.1006"></a> +<span class="sourceLineNo">1007</span> private static final Random RANDOM = new Random(System.currentTimeMillis());<a name="line.1007"></a> +<span class="sourceLineNo">1008</span> private static final Logger LOG = LoggerFactory.getLogger(BaseLoadBalancer.class);<a name="line.1008"></a> +<span class="sourceLineNo">1009</span> protected MetricsBalancer metricsBalancer = null;<a name="line.1009"></a> +<span class="sourceLineNo">1010</span> protected ClusterMetrics clusterStatus = null;<a name="line.1010"></a> +<span class="sourceLineNo">1011</span> protected ServerName masterServerName;<a name="line.1011"></a> +<span class="sourceLineNo">1012</span> protected MasterServices services;<a name="line.1012"></a> +<span class="sourceLineNo">1013</span> protected boolean tablesOnMaster;<a name="line.1013"></a> +<span class="sourceLineNo">1014</span> protected boolean onlySystemTablesOnMaster;<a name="line.1014"></a> +<span class="sourceLineNo">1015</span><a name="line.1015"></a> +<span class="sourceLineNo">1016</span> @Override<a name="line.1016"></a> +<span class="sourceLineNo">1017</span> public void setConf(Configuration conf) {<a name="line.1017"></a> +<span class="sourceLineNo">1018</span> this.config = conf;<a name="line.1018"></a> +<span class="sourceLineNo">1019</span> setSlop(conf);<a name="line.1019"></a> +<span class="sourceLineNo">1020</span> if (slop < 0) slop = 0;<a name="line.1020"></a> +<span class="sourceLineNo">1021</span> else if (slop > 1) slop = 1;<a name="line.1021"></a> +<span class="sourceLineNo">1022</span><a name="line.1022"></a> +<span class="sourceLineNo">1023</span> if (overallSlop < 0) overallSlop = 0;<a name="line.1023"></a> +<span class="sourceLineNo">1024</span> else if (overallSlop > 1) overallSlop = 1;<a name="line.1024"></a> +<span class="sourceLineNo">1025</span><a name="line.1025"></a> +<span class="sourceLineNo">1026</span> this.tablesOnMaster = LoadBalancer.isTablesOnMaster(this.config);<a name="line.1026"></a> +<span class="sourceLineNo">1027</span> this.onlySystemTablesOnMaster = LoadBalancer.isSystemTablesOnlyOnMaster(this.config);<a name="line.1027"></a> +<span cl
<TRUNCATED>
