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server/manager/src/main/java/org/apache/accumulo/manager/merge/FindMergeableRangeTask.java
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| /* | ||
| * 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 | ||
| * | ||
| * https://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * 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.accumulo.manager.merge; | ||
|
|
||
| import static org.apache.accumulo.core.metadata.schema.TabletMetadata.ColumnType.FILES; | ||
| import static org.apache.accumulo.core.metadata.schema.TabletMetadata.ColumnType.MERGEABILITY; | ||
|
|
||
| import java.util.Map; | ||
| import java.util.Map.Entry; | ||
| import java.util.Objects; | ||
|
|
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| import org.apache.accumulo.core.clientImpl.thrift.TableOperation; | ||
| import org.apache.accumulo.core.conf.Property; | ||
| import org.apache.accumulo.core.data.NamespaceId; | ||
| import org.apache.accumulo.core.data.TableId; | ||
| import org.apache.accumulo.core.fate.Fate.FateOperation; | ||
| import org.apache.accumulo.core.fate.FateInstanceType; | ||
| import org.apache.accumulo.core.metadata.schema.TabletMetadata; | ||
| import org.apache.accumulo.core.util.time.SteadyTime; | ||
| import org.apache.accumulo.manager.Manager; | ||
| import org.apache.accumulo.manager.tableOps.TraceRepo; | ||
| import org.apache.accumulo.manager.tableOps.merge.MergeInfo; | ||
| import org.apache.accumulo.manager.tableOps.merge.TableRangeOp; | ||
| import org.apache.commons.lang3.StringUtils; | ||
| import org.apache.hadoop.io.Text; | ||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
|
|
||
| public class FindMergeableRangeTask implements Runnable { | ||
|
|
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| private static final Logger log = LoggerFactory.getLogger(FindMergeableRangeTask.class); | ||
| private final Manager manager; | ||
|
|
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| public FindMergeableRangeTask(Manager manager) { | ||
| this.manager = Objects.requireNonNull(manager); | ||
| } | ||
|
|
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| @Override | ||
| public void run() { | ||
| var context = manager.getContext(); | ||
| Map<TableId,String> tables = context.getTableIdToNameMap(); | ||
|
|
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| for (Entry<TableId,String> table : tables.entrySet()) { | ||
| TableId tableId = table.getKey(); | ||
| String tableName = table.getValue(); | ||
|
|
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| long maxFileCount = | ||
| context.getTableConfiguration(tableId).getCount(Property.TABLE_MERGE_FILE_MAX); | ||
| long threshold = | ||
| context.getTableConfiguration(tableId).getAsBytes(Property.TABLE_SPLIT_THRESHOLD); | ||
| double mergeabilityThreshold = .25; | ||
| long maxTotalSize = (long) (threshold * mergeabilityThreshold); | ||
|
|
||
| try { | ||
| NamespaceId namespaceId = context.getNamespaceId(tableId); | ||
| var type = FateInstanceType.fromTableId(tableId); | ||
|
|
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| try (var tablets = context.getAmple().readTablets().forTable(tableId) | ||
| .fetch(FILES, MERGEABILITY).checkConsistency().build()) { | ||
|
|
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| final MergeableRange current = | ||
| new MergeableRange(manager.getSteadyTime(), maxFileCount, maxTotalSize); | ||
|
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| for (var tabletMetadata : tablets) { | ||
|
|
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| if (!current.add(tabletMetadata)) { | ||
| submit(current, type, table, namespaceId); | ||
| current.resetAndAdd(tabletMetadata); | ||
| } | ||
|
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| // log.debug("{} found {} files in the merge range, maxFiles is {}", fateId, | ||
| // totalFiles, | ||
| // maxFiles); | ||
| // mergeable = false; | ||
| // } | ||
| } | ||
|
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| submit(current, type, table, namespaceId); | ||
| } | ||
|
|
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| } catch (Exception e) { | ||
| log.error("Failed to generate system merges for {}", tableName, e); | ||
| } | ||
| } | ||
|
|
||
| } | ||
|
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| void submit(MergeableRange range, FateInstanceType type, Entry<TableId,String> table, | ||
| NamespaceId namespaceId) { | ||
| if (range.tabletCount < 2) { | ||
| return; | ||
| } | ||
|
|
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| TableId tableId = table.getKey(); | ||
| String tableName = table.getValue(); | ||
|
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| String startRowStr = StringUtils.defaultIfBlank(range.startRow.toString(), "-inf"); | ||
| String endRowStr = StringUtils.defaultIfBlank(range.startRow.toString(), "+inf"); | ||
| log.debug("Creating merge op: {} from startRow: {} to endRow: {}", tableId, startRowStr, | ||
| endRowStr); | ||
| var fateId = manager.fate(type).startTransaction(); | ||
| String goalMessage = TableOperation.MERGE + " Merge table " + tableName + "(" + tableId | ||
| + ") splits from " + startRowStr + " to " + endRowStr; | ||
|
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| manager.fate(type).seedTransaction(FateOperation.SYSTEM_MERGE, fateId, | ||
| new TraceRepo<>(new TableRangeOp(MergeInfo.Operation.MERGE, namespaceId, tableId, | ||
| range.startRow, range.endRow)), | ||
| true, goalMessage); | ||
| } | ||
|
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| static class MergeableRange { | ||
| final SteadyTime currentTime; | ||
| final long maxFileCount; | ||
| final long maxTotalSize; | ||
|
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| Text startRow; | ||
| Text endRow; | ||
| int tabletCount; | ||
| long totalFileCount = 0; | ||
| long totalFileSize = 0; | ||
|
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| MergeableRange(SteadyTime currentTime, long maxFileCount, long maxTotalSize) { | ||
| this.currentTime = currentTime; | ||
| this.maxFileCount = maxFileCount; | ||
| this.maxTotalSize = maxTotalSize; | ||
| } | ||
|
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| boolean add(TabletMetadata tm) { | ||
| if (validate(tm)) { | ||
| tabletCount++; | ||
| if (startRow == null) { | ||
| startRow = tm.getEndRow(); | ||
| } else { | ||
| endRow = tm.getEndRow(); | ||
| } | ||
| totalFileCount += tm.getFiles().size(); | ||
| totalFileSize += tm.getFileSize(); | ||
| return true; | ||
| } | ||
| return false; | ||
| } | ||
|
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| private boolean validate(TabletMetadata tm) { | ||
| if (!tm.getTabletMergeability().isMergeable(currentTime)) { | ||
| return false; | ||
| } | ||
|
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| if (totalFileCount + tm.getFiles().size() > maxFileCount) { | ||
| return false; | ||
| } | ||
|
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| return totalFileSize + tm.getFileSize() <= maxTotalSize; | ||
| } | ||
|
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| void resetAndAdd(TabletMetadata tm) { | ||
| reset(); | ||
| add(tm); | ||
| } | ||
|
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| void reset() { | ||
| startRow = null; | ||
| endRow = null; | ||
| tabletCount = 0; | ||
| totalFileCount = 0; | ||
| totalFileSize = 0; | ||
| } | ||
| } | ||
| } |
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