| namespace Lucene.Net.Index |
| { |
| /* |
| * 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 |
| * |
| * http://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. |
| */ |
| |
| /// <summary> |
| /// this is a <seealso cref="LogMergePolicy"/> that measures size of a |
| /// segment as the number of documents (not taking deletions |
| /// into account). |
| /// </summary> |
| |
| public class LogDocMergePolicy : LogMergePolicy |
| { |
| /// Default minimum segment size. <seealso cref= setMinMergeDocs </seealso> |
| public const int DEFAULT_MIN_MERGE_DOCS = 1000; |
| |
| /// <summary> |
| /// Sole constructor, setting all settings to their |
| /// defaults. |
| /// </summary> |
| public LogDocMergePolicy() |
| { |
| MinMergeSize = DEFAULT_MIN_MERGE_DOCS; |
| |
| // maxMergeSize(ForForcedMerge) are never used by LogDocMergePolicy; set |
| // it to Long.MAX_VALUE to disable it |
| MaxMergeSize = long.MaxValue; |
| MaxMergeSizeForForcedMerge = long.MaxValue; |
| } |
| |
| protected internal override long Size(SegmentCommitInfo info) |
| { |
| return SizeDocs(info); |
| } |
| |
| /// <summary> |
| /// Sets the minimum size for the lowest level segments. |
| /// Any segments below this size are considered to be on |
| /// the same level (even if they vary drastically in size) |
| /// and will be merged whenever there are mergeFactor of |
| /// them. this effectively truncates the "long tail" of |
| /// small segments that would otherwise be created into a |
| /// single level. If you set this too large, it could |
| /// greatly increase the merging cost during indexing (if |
| /// you flush many small segments). |
| /// </summary> |
| public virtual int MinMergeDocs |
| { |
| set |
| { |
| MinMergeSize = value; |
| } |
| get |
| { |
| return (int)MinMergeSize; |
| } |
| } |
| } |
| } |