Examples with BalancedRandomRoutingTableBuilder com.linkedin.pinot.routing.builder.BalancedRandomRoutingTableBuilder used on opensource projects

Example 1 with BalancedRandomRoutingTableBuilder

use of com.linkedin.pinot.routing.builder.BalancedRandomRoutingTableBuilder in project pinot by linkedin.

the class RandomRoutingTableTest method testHelixExternalViewBasedRoutingTable.

@Test
public void testHelixExternalViewBasedRoutingTable() throws Exception {
    URL resourceUrl = getClass().getClassLoader().getResource("SampleExternalView.json");
    Assert.assertNotNull(resourceUrl);
    String fileName = resourceUrl.getFile();
    String tableName = "testTable_OFFLINE";
    InputStream evInputStream = new FileInputStream(fileName);
    ZNRecordSerializer znRecordSerializer = new ZNRecordSerializer();
    ZNRecord externalViewRecord = (ZNRecord) znRecordSerializer.deserialize(IOUtils.toByteArray(evInputStream));
    int totalRuns = 10000;
    RoutingTableBuilder routingStrategy = new BalancedRandomRoutingTableBuilder(10);
    HelixExternalViewBasedRouting routingTable = new HelixExternalViewBasedRouting(null, new PercentageBasedRoutingTableSelector(), null, new BaseConfiguration());
    routingTable.setSmallClusterRoutingTableBuilder(routingStrategy);
    ExternalView externalView = new ExternalView(externalViewRecord);
    routingTable.markDataResourceOnline(tableName, externalView, getInstanceConfigs(externalView));
    double[] globalArrays = new double[9];
    for (int numRun = 0; numRun < totalRuns; ++numRun) {
        RoutingTableLookupRequest request = new RoutingTableLookupRequest(tableName, Collections.<String>emptyList());
        Map<ServerInstance, SegmentIdSet> serversMap = routingTable.findServers(request);
        TreeSet<ServerInstance> serverInstances = new TreeSet<ServerInstance>(serversMap.keySet());
        int i = 0;
        double[] arrays = new double[9];
        for (ServerInstance serverInstance : serverInstances) {
            globalArrays[i] += serversMap.get(serverInstance).getSegments().size();
            arrays[i++] = serversMap.get(serverInstance).getSegments().size();
        }
        for (int j = 0; i < arrays.length; ++j) {
            Assert.assertTrue(arrays[j] / totalRuns <= 31);
            Assert.assertTrue(arrays[j] / totalRuns >= 28);
        }
    //      System.out.println(Arrays.toString(arrays) + " : " + new StandardDeviation().evaluate(arrays) + " : " + new Mean().evaluate(arrays));
    }
    for (int i = 0; i < globalArrays.length; ++i) {
        Assert.assertTrue(globalArrays[i] / totalRuns <= 31);
        Assert.assertTrue(globalArrays[i] / totalRuns >= 28);
    }
//    System.out.println(Arrays.toString(globalArrays) + " : " + new StandardDeviation().evaluate(globalArrays) + " : "
//        + new Mean().evaluate(globalArrays));
}