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https://issues.apache.org/jira/browse/HDDS-1366?focusedWorklogId=289219&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-289219
]
ASF GitHub Bot logged work on HDDS-1366:
----------------------------------------
Author: ASF GitHub Bot
Created on: 05/Aug/19 21:45
Start Date: 05/Aug/19 21:45
Worklog Time Spent: 10m
Work Description: shwetayakkali commented on pull request #1146:
HDDS-1366. Add ability in Recon to track the number of small files in an Ozone
Cluster
URL: https://github.com/apache/hadoop/pull/1146#discussion_r310805057
##########
File path:
hadoop-ozone/ozone-recon/src/main/java/org/apache/hadoop/ozone/recon/tasks/FileSizeCountTask.java
##########
@@ -0,0 +1,254 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.hadoop.ozone.recon.tasks;
+
+import com.google.inject.Inject;
+import org.apache.commons.lang3.tuple.ImmutablePair;
+import org.apache.commons.lang3.tuple.Pair;
+import org.apache.hadoop.ozone.om.OMMetadataManager;
+import org.apache.hadoop.ozone.om.helpers.OmKeyInfo;
+import org.apache.hadoop.utils.db.Table;
+import org.apache.hadoop.utils.db.TableIterator;
+import org.hadoop.ozone.recon.schema.tables.daos.FileCountBySizeDao;
+import org.hadoop.ozone.recon.schema.tables.pojos.FileCountBySize;
+import org.jooq.Configuration;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Iterator;
+import java.util.List;
+
+/**
+ * Class to iterate over the OM DB and store the counts of existing/new
+ * files binned into ranges (1KB, 10Kb..,10MB,..1PB) to the Recon
+ * fileSize DB.
+ */
+public class FileSizeCountTask extends ReconDBUpdateTask {
+ private static final Logger LOG =
+ LoggerFactory.getLogger(FileSizeCountTask.class);
+
+ private int maxBinSize;
+ private long maxFileSizeUpperBound = 1125899906842624L; // 1 PB
+ private long[] upperBoundCount = new long[maxBinSize];
+ private long ONE_KB = 1024L;
+ private Collection<String> tables = new ArrayList<>();
+ private FileCountBySizeDao fileCountBySizeDao;
+
+ @Inject
+ public FileSizeCountTask(OMMetadataManager omMetadataManager,
+ Configuration sqlConfiguration) {
+ super("FileSizeCountTask");
+ try {
+ tables.add(omMetadataManager.getKeyTable().getName());
+ fileCountBySizeDao = new FileCountBySizeDao(sqlConfiguration);
+ } catch (Exception e) {
+ LOG.error("Unable to fetch Key Table updates ", e);
+ }
+ }
+
+ protected long getOneKB() {
+ return ONE_KB;
+ }
+
+ protected long getMaxFileSizeUpperBound() {
+ return maxFileSizeUpperBound;
+ }
+
+ protected int getMaxBinSize() {
+ return maxBinSize;
+ }
+
+ /**
+ * Read the Keys from OM snapshot DB and calculate the upper bound of
+ * File Size it belongs to.
+ *
+ * @param omMetadataManager OM Metadata instance.
+ * @return Pair
+ */
+ @Override
+ public Pair<String, Boolean> reprocess(OMMetadataManager omMetadataManager) {
+ LOG.info("Starting a 'reprocess' run of FileSizeCountTask.");
+
+ fetchUpperBoundCount("reprocess");
+
+ Table<String, OmKeyInfo> omKeyInfoTable = omMetadataManager.getKeyTable();
+ try (TableIterator<String, ? extends Table.KeyValue<String, OmKeyInfo>>
+ keyIter = omKeyInfoTable.iterator()) {
+ while (keyIter.hasNext()) {
+ Table.KeyValue<String, OmKeyInfo> kv = keyIter.next();
+ countFileSize(kv.getValue());
+ }
+ } catch (IOException ioEx) {
+ LOG.error("Unable to populate File Size Count in Recon DB. ", ioEx);
+ return new ImmutablePair<>(getTaskName(), false);
+ } finally {
+ populateFileCountBySizeDB();
+ }
+
+ LOG.info("Completed a 'reprocess' run of FileSizeCountTask.");
+ return new ImmutablePair<>(getTaskName(), true);
+ }
+
+ void setMaxBinSize() {
+ maxBinSize = (int)(long) (Math.log(getMaxFileSizeUpperBound())
+ /Math.log(2)) - 10;
+ maxBinSize += 2; // extra bin to add files > 1PB.
+ }
+
+ void fetchUpperBoundCount(String type) {
+ setMaxBinSize();
+ if (type.equals("process")) {
+ //update array with file size count from DB
+ List<FileCountBySize> resultSet = fileCountBySizeDao.findAll();
+ int index = 0;
+ if (resultSet != null) {
+ for (FileCountBySize row : resultSet) {
+ upperBoundCount[index] = row.getCount();
+ index++;
+ }
+ }
+ } else {
+ upperBoundCount = new long[getMaxBinSize()]; //initialize array
+ }
+ }
+
+ @Override
+ protected Collection<String> getTaskTables() {
+ return tables;
+ }
+
+ /**
+ * Read the Keys from update events and update the count of files
+ * pertaining to a certain upper bound.
+ *
+ * @param events Update events - PUT/DELETE.
+ * @return Pair
+ */
+ @Override
+ Pair<String, Boolean> process(OMUpdateEventBatch events) {
+ LOG.info("Starting a 'process' run of FileSizeCountTask.");
+ Iterator<OMDBUpdateEvent> eventIterator = events.getIterator();
+
+ fetchUpperBoundCount("process");
Review comment:
-Yes, total number of bins is 42, based on max file size permitted (1 PB).
-For reprocess, fetchUpperBoundCount() initializes it based on maxFileSize.
For process, fetchUpperBoundCount() first initializes the array to fetch
count from DB and then updates based on events for process().
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Issue Time Tracking
-------------------
Worklog Id: (was: 289219)
Time Spent: 5h 10m (was: 5h)
> Add ability in Recon to track the number of small files in an Ozone cluster.
> ----------------------------------------------------------------------------
>
> Key: HDDS-1366
> URL: https://issues.apache.org/jira/browse/HDDS-1366
> Project: Hadoop Distributed Data Store
> Issue Type: Sub-task
> Components: Ozone Recon
> Reporter: Aravindan Vijayan
> Assignee: Shweta
> Priority: Major
> Labels: pull-request-available
> Time Spent: 5h 10m
> Remaining Estimate: 0h
>
> Ozone users may want to track the number of small files they have in their
> cluster and where they are present. Recon can help them with the information
> by iterating the OM Key Table and dividing the keys into different buckets
> based on the data size.
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