Examples with DELETES_STAT org.apache.accumulo.core.client.summary.summarizers.DeletesSummarizer.DELETES_STAT used on opensource projects

Example 1 with DELETES_STAT

use of org.apache.accumulo.core.client.summary.summarizers.DeletesSummarizer.DELETES_STAT in project accumulo by apache.

the class TooManyDeletesCompactionStrategy method gatherInformation.

@Override
public void gatherInformation(MajorCompactionRequest request) throws IOException {
    super.gatherInformation(request);
    Predicate<SummarizerConfiguration> summarizerPredicate = conf -> conf.getClassName().equals(DeletesSummarizer.class.getName()) && conf.getOptions().isEmpty();
    long total = 0;
    long deletes = 0;
    for (Entry<FileRef, DataFileValue> entry : request.getFiles().entrySet()) {
        Collection<Summary> summaries = request.getSummaries(Collections.singleton(entry.getKey()), summarizerPredicate);
        if (summaries.size() == 1) {
            Summary summary = summaries.iterator().next();
            total += summary.getStatistics().get(TOTAL_STAT);
            deletes += summary.getStatistics().get(DELETES_STAT);
        } else {
            long numEntries = entry.getValue().getNumEntries();
            if (numEntries == 0 && !proceed_bns) {
                shouldCompact = false;
                return;
            } else {
                // no summary data so use Accumulo's estimate of total entries in file
                total += entry.getValue().getNumEntries();
            }
        }
    }
    long nonDeletes = total - deletes;
    if (nonDeletes >= 0) {
        // check nonDeletes >= 0 because if this is not true then its clear evidence that the estimates are off
        double ratio = deletes / (double) nonDeletes;
        shouldCompact = ratio >= threshold;
    } else {
        shouldCompact = false;
    }
}