Github user keith-turner commented on a diff in the pull request:
https://github.com/apache/accumulo/pull/135#discussion_r77687200
--- Diff: docs/src/main/resources/examples/README.compactionStrategy ---
@@ -0,0 +1,60 @@
+Title: Apache Accumulo Customizing the Compaction Strategy
+Notice: 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.
+
+This tutorial uses the following Java classes, which can be found in
org.apache.accumulo.tserver.compaction:
+
+ * DefaultCompactionStrategy.java - determines which files to compact
based on table.compaction.major.ratio and table.file.max
+ * EverythingCompactionStrategy.java - compacts all files
+ * SizeLimitCompactionStrategy.java - compacts files no bigger than
table.majc.compaction.strategy.opts.sizeLimit
+ * TwoTierCompactionStrategy.java - uses default compression for smaller
files and table.majc.compaction.strategy.opts.file.large.compress.type for
larger files
+
+This is an example of how to configure a compaction strategy. By default
Accumulo will always use the DefaultCompactionStrategy, unless
+these steps are taken to change the configuration. Use the strategy and
settings that best fits your Accumulo setup.
+
+The command below sets the compression for smaller files and minor
compactions.
+
+ $ ./bin/accumulo shell -u root -p secret -e "config -s
table.file.compress.type=snappy"
+
+The commands below will configure the TwoTierCompactionStrategy to use gz
compression for files larger than 1M.
+
+ $ ./bin/accumulo shell -u root -p secret -e "config -s
table.majc.compaction.strategy.opts.file.large.compress.threshold=1M"
+ $ ./bin/accumulo shell -u root -p secret -e "config -s
table.majc.compaction.strategy.opts.file.large.compress.type=gz"
+ $ ./bin/accumulo shell -u root -p secret -e "config -s
table.majc.compaction.strategy=org.apache.accumulo.tserver.compaction.TwoTierCompactionStrategy"
+
+Generate some data and files in order to test the strategy:
+
+ $ ./bin/accumulo shell -u root -p secret -e "createtable test1"
+ $ ./bin/accumulo
org.apache.accumulo.examples.simple.client.SequentialBatchWriter -i instance17
-z localhost:2181 -u root -p secret -t test1 --start 0 --num 10000 --size 50
--batchMemory 20M --batchLatency 500 --batchThreads 20
+ $ ./bin/accumulo shell -u root -p secret -e "flush -t test1"
+ $ ./bin/accumulo
org.apache.accumulo.examples.simple.client.SequentialBatchWriter -i instance17
-z localhost:2181 -u root -p secret -t test1 --start 0 --num 11000 --size 50
--batchMemory 20M --batchLatency 500 --batchThreads 20
+ $ ./bin/accumulo shell -u root -p secret -e "flush -t test1"
+ $ ./bin/accumulo
org.apache.accumulo.examples.simple.client.SequentialBatchWriter -i instance17
-z localhost:2181 -u root -p secret -t test1 --start 0 --num 12000 --size 50
--batchMemory 20M --batchLatency 500 --batchThreads 20
+ $ ./bin/accumulo shell -u root -p secret -e "flush -t test1"
+ $ ./bin/accumulo
org.apache.accumulo.examples.simple.client.SequentialBatchWriter -i instance17
-z localhost:2181 -u root -p secret -t test1 --start 0 --num 13000 --size 50
--batchMemory 20M --batchLatency 500 --batchThreads 20
+ $ ./bin/accumulo shell -u root -p secret -e "flush -t test1"
+
+View the tserver log in <accumulo_home>/logs for the compaction and find
the name of the <rfile> that was compacted for your table. Print info about
this file using the PrintInfo tool:
+
+ $ ./bin/accumulo org.apache.accumulo.core.file.rfile.PrintInfo <rfile>
--- End diff --
Can use `accumulo rfile-info` now that the command is fixed.
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