Examples with Severity com.linkedin.drelephant.analysis.Severity used on opensource projects

Example 11 with Severity

use of com.linkedin.drelephant.analysis.Severity in project dr-elephant by linkedin.

the class GenericDataSkewHeuristic method apply.

public HeuristicResult apply(TezApplicationData data) {
    if (!data.getSucceeded()) {
        return null;
    }
    TezTaskData[] tasks = getTasks(data);
    // Gathering data for checking time skew
    List<Long> timeTaken = new ArrayList<Long>();
    for (int i = 0; i < tasks.length; i++) {
        if (tasks[i].isSampled()) {
            timeTaken.add(tasks[i].getTotalRunTimeMs());
        }
    }
    long[][] groupsTime = Statistics.findTwoGroups(Longs.toArray(timeTaken));
    long timeAvg1 = Statistics.average(groupsTime[0]);
    long timeAvg2 = Statistics.average(groupsTime[1]);
    // seconds are used for calculating deviation as they provide a better idea than millisecond.
    long timeAvgSec1 = TimeUnit.MILLISECONDS.toSeconds(timeAvg1);
    long timeAvgSec2 = TimeUnit.MILLISECONDS.toSeconds(timeAvg2);
    long minTime = Math.min(timeAvgSec1, timeAvgSec2);
    long diffTime = Math.abs(timeAvgSec1 - timeAvgSec2);
    // using the same deviation limits for time skew as for data skew. It can be changed in the fututre.
    Severity severityTime = getDeviationSeverity(minTime, diffTime);
    // This reduces severity if number of tasks is insignificant
    severityTime = Severity.min(severityTime, Severity.getSeverityAscending(groupsTime[0].length, numTasksLimits[0], numTasksLimits[1], numTasksLimits[2], numTasksLimits[3]));
    // Gather data
    List<Long> inputSizes = new ArrayList<Long>();
    for (int i = 0; i < tasks.length; i++) {
        if (tasks[i].isSampled()) {
            long inputByte = 0;
            for (TezCounterData.CounterName counterName : _counterNames) {
                inputByte += tasks[i].getCounters().get(counterName);
            }
            inputSizes.add(inputByte);
        }
    }
    long[][] groups = Statistics.findTwoGroups(Longs.toArray(inputSizes));
    long avg1 = Statistics.average(groups[0]);
    long avg2 = Statistics.average(groups[1]);
    long min = Math.min(avg1, avg2);
    long diff = Math.abs(avg2 - avg1);
    Severity severityData = getDeviationSeverity(min, diff);
    // This reduces severity if the largest file sizes are insignificant
    severityData = Severity.min(severityData, getFilesSeverity(avg2));
    // This reduces severity if number of tasks is insignificant
    severityData = Severity.min(severityData, Severity.getSeverityAscending(groups[0].length, numTasksLimits[0], numTasksLimits[1], numTasksLimits[2], numTasksLimits[3]));
    Severity severity = Severity.max(severityData, severityTime);
    HeuristicResult result = new HeuristicResult(_heuristicConfData.getClassName(), _heuristicConfData.getHeuristicName(), severity, Utils.getHeuristicScore(severityData, tasks.length));
    result.addResultDetail("Data skew (Number of tasks)", Integer.toString(tasks.length));
    result.addResultDetail("Data skew (Group A)", groups[0].length + " tasks @ " + FileUtils.byteCountToDisplaySize(avg1) + " avg");
    result.addResultDetail("Data skew (Group B)", groups[1].length + " tasks @ " + FileUtils.byteCountToDisplaySize(avg2) + " avg");
    result.addResultDetail("Time skew (Number of tasks)", Integer.toString(tasks.length));
    result.addResultDetail("Time skew (Group A)", groupsTime[0].length + " tasks @ " + convertTimeMs(timeAvg1) + " avg");
    result.addResultDetail("Time skew (Group B)", groupsTime[1].length + " tasks @ " + convertTimeMs(timeAvg2) + " avg");
    return result;
}

Example 12 with Severity

use of com.linkedin.drelephant.analysis.Severity in project dr-elephant by linkedin.

the class GenericGCHeuristic method getGcRatioSeverity.

private Severity getGcRatioSeverity(long runtimeMs, long cpuMs, long gcMs) {
    double gcRatio = ((double) gcMs) / cpuMs;
    Severity ratioSeverity = Severity.getSeverityAscending(gcRatio, gcRatioLimits[0], gcRatioLimits[1], gcRatioLimits[2], gcRatioLimits[3]);
    // Severity is reduced if task runtime is insignificant
    Severity runtimeSeverity = getRuntimeSeverity(runtimeMs);
    return Severity.min(ratioSeverity, runtimeSeverity);
}

Example 13 with Severity

use of com.linkedin.drelephant.analysis.Severity in project dr-elephant by linkedin.

the class GenericMemoryHeuristic method apply.

@Override
public HeuristicResult apply(MapReduceApplicationData data) {
    if (!data.getSucceeded()) {
        return null;
    }
    String containerSizeStr = data.getConf().getProperty(_containerMemConf);
    long containerMem = -1L;
    if (containerSizeStr != null) {
        try {
            containerMem = Long.parseLong(containerSizeStr);
        } catch (NumberFormatException e0) {
            // Some job has a string var like "${VAR}" for this config.
            if (containerSizeStr.startsWith("$")) {
                String realContainerConf = containerSizeStr.substring(containerSizeStr.indexOf("{") + 1, containerSizeStr.indexOf("}"));
                String realContainerSizeStr = data.getConf().getProperty(realContainerConf);
                try {
                    containerMem = Long.parseLong(realContainerSizeStr);
                } catch (NumberFormatException e1) {
                    logger.warn(realContainerConf + ": expected number [" + realContainerSizeStr + "]");
                }
            } else {
                logger.warn(_containerMemConf + ": expected number [" + containerSizeStr + "]");
            }
        }
    }
    if (containerMem < 0) {
        containerMem = getContainerMemDefaultMBytes();
    }
    containerMem *= FileUtils.ONE_MB;
    MapReduceTaskData[] tasks = getTasks(data);
    List<Long> taskPMems = new ArrayList<Long>();
    List<Long> taskVMems = new ArrayList<Long>();
    List<Long> runtimesMs = new ArrayList<Long>();
    long taskPMin = Long.MAX_VALUE;
    long taskPMax = 0;
    for (MapReduceTaskData task : tasks) {
        if (task.isTimeAndCounterDataPresent()) {
            runtimesMs.add(task.getTotalRunTimeMs());
            long taskPMem = task.getCounters().get(MapReduceCounterData.CounterName.PHYSICAL_MEMORY_BYTES);
            long taskVMem = task.getCounters().get(MapReduceCounterData.CounterName.VIRTUAL_MEMORY_BYTES);
            taskPMems.add(taskPMem);
            taskPMin = Math.min(taskPMin, taskPMem);
            taskPMax = Math.max(taskPMax, taskPMem);
            taskVMems.add(taskVMem);
        }
    }
    if (taskPMin == Long.MAX_VALUE) {
        taskPMin = 0;
    }
    long taskPMemAvg = Statistics.average(taskPMems);
    long taskVMemAvg = Statistics.average(taskVMems);
    long averageTimeMs = Statistics.average(runtimesMs);
    Severity severity;
    if (tasks.length == 0) {
        severity = Severity.NONE;
    } else {
        severity = getTaskMemoryUtilSeverity(taskPMemAvg, containerMem);
    }
    HeuristicResult result = new HeuristicResult(_heuristicConfData.getClassName(), _heuristicConfData.getHeuristicName(), severity, Utils.getHeuristicScore(severity, tasks.length));
    result.addResultDetail("Number of tasks", Integer.toString(tasks.length));
    result.addResultDetail("Avg task runtime", Statistics.readableTimespan(averageTimeMs));
    result.addResultDetail("Avg Physical Memory (MB)", Long.toString(taskPMemAvg / FileUtils.ONE_MB));
    result.addResultDetail("Max Physical Memory (MB)", Long.toString(taskPMax / FileUtils.ONE_MB));
    result.addResultDetail("Min Physical Memory (MB)", Long.toString(taskPMin / FileUtils.ONE_MB));
    result.addResultDetail("Avg Virtual Memory (MB)", Long.toString(taskVMemAvg / FileUtils.ONE_MB));
    result.addResultDetail("Requested Container Memory", FileUtils.byteCountToDisplaySize(containerMem));
    return result;
}

Example 14 with Severity

use of com.linkedin.drelephant.analysis.Severity in project dr-elephant by linkedin.

the class JobQueueLimitHeuristic method apply.

@Override
public HeuristicResult apply(MapReduceApplicationData data) {
    HeuristicResult result = new HeuristicResult(_heuristicConfData.getClassName(), _heuristicConfData.getHeuristicName(), Severity.NONE, 0);
    Properties jobConf = data.getConf();
    long queueTimeoutLimitMs = TimeUnit.MINUTES.toMillis(15);
    // Fetch the Queue to which the job is submitted.
    String queueName = jobConf.getProperty("mapred.job.queue.name");
    if (queueName == null) {
        throw new IllegalStateException("Queue Name not found.");
    }
    // Compute severity if job is submitted to default queue else set severity to NONE.
    MapReduceTaskData[] mapTasks = data.getMapperData();
    MapReduceTaskData[] redTasks = data.getReducerData();
    Severity[] mapTasksSeverity = new Severity[mapTasks.length];
    Severity[] redTasksSeverity = new Severity[redTasks.length];
    if (queueName.equals("default")) {
        result.addResultDetail("Queue: ", queueName, null);
        result.addResultDetail("Number of Map tasks", Integer.toString(mapTasks.length));
        result.addResultDetail("Number of Reduce tasks", Integer.toString(redTasks.length));
        // Calculate Severity of Mappers
        mapTasksSeverity = getTasksSeverity(mapTasks, queueTimeoutLimitMs);
        result.addResultDetail("Number of Map tasks that are in severe state (14 to 14.5 min)", Long.toString(getSeverityFrequency(Severity.SEVERE, mapTasksSeverity)));
        result.addResultDetail("Number of Map tasks that are in critical state (over 14.5 min)", Long.toString(getSeverityFrequency(Severity.CRITICAL, mapTasksSeverity)));
        // Calculate Severity of Reducers
        redTasksSeverity = getTasksSeverity(redTasks, queueTimeoutLimitMs);
        result.addResultDetail("Number of Reduce tasks that are in severe state (14 to 14.5 min)", Long.toString(getSeverityFrequency(Severity.SEVERE, redTasksSeverity)));
        result.addResultDetail("Number of Reduce tasks that are in critical state (over 14.5 min)", Long.toString(getSeverityFrequency(Severity.CRITICAL, redTasksSeverity)));
        // Calculate Job severity
        result.setSeverity(Severity.max(Severity.max(mapTasksSeverity), Severity.max(redTasksSeverity)));
    } else {
        result.addResultDetail("Not Applicable", "This Heuristic is not applicable to " + queueName + " queue");
        result.setSeverity(Severity.NONE);
    }
    return result;
}

Example 15 with Severity

use of com.linkedin.drelephant.analysis.Severity in project dr-elephant by linkedin.

the class ReducerTimeHeuristic method apply.

@Override
public HeuristicResult apply(MapReduceApplicationData data) {
    if (!data.getSucceeded()) {
        return null;
    }
    MapReduceTaskData[] tasks = data.getReducerData();
    List<Long> runTimesMs = new ArrayList<Long>();
    long taskMinMs = Long.MAX_VALUE;
    long taskMaxMs = 0;
    for (MapReduceTaskData task : tasks) {
        if (task.isTimeDataPresent()) {
            long taskTime = task.getTotalRunTimeMs();
            runTimesMs.add(taskTime);
            taskMinMs = Math.min(taskMinMs, taskTime);
            taskMaxMs = Math.max(taskMaxMs, taskTime);
        }
    }
    if (taskMinMs == Long.MAX_VALUE) {
        taskMinMs = 0;
    }
    // Analyze data
    long averageRuntimeMs = Statistics.average(runTimesMs);
    Severity shortTimeSeverity = shortTimeSeverity(averageRuntimeMs, tasks.length);
    Severity longTimeSeverity = longTimeSeverity(averageRuntimeMs, tasks.length);
    Severity severity = Severity.max(shortTimeSeverity, longTimeSeverity);
    HeuristicResult result = new HeuristicResult(_heuristicConfData.getClassName(), _heuristicConfData.getHeuristicName(), severity, Utils.getHeuristicScore(severity, tasks.length));
    result.addResultDetail("Number of tasks", Integer.toString(tasks.length));
    result.addResultDetail("Average task runtime", Statistics.readableTimespan(averageRuntimeMs));
    result.addResultDetail("Max task runtime", Statistics.readableTimespan(taskMaxMs));
    result.addResultDetail("Min task runtime", Statistics.readableTimespan(taskMinMs));
    return result;
}