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Core: use compound file by default for merged segments < 10% of index size

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Change Elasticsearch to use Lucene's defaults, to reduce file descriptor count.

Closes #8934

Closes #8919
This commit is contained in:
Michael McCandless 2014-12-12 15:51:37 -05:00 committed by mikemccand
parent 60e805cc1f
commit ae11c4654b
3 changed files with 9 additions and 14 deletions
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4
src/main/java/org/elasticsearch/index/merge/policy/AbstractMergePolicyProvider.java
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@ -19,6 +19,7 @@
package org.elasticsearch.index.merge.policy;
import org.apache.lucene.index.MergePolicy;
import org.apache.lucene.index.TieredMergePolicy;
import org.elasticsearch.ElasticsearchIllegalArgumentException;
import org.elasticsearch.index.shard.AbstractIndexShardComponent;
import org.elasticsearch.index.store.Store;
@ -31,7 +32,8 @@ public abstract class AbstractMergePolicyProvider<MP extends MergePolicy> extend
protected AbstractMergePolicyProvider(Store store) {
super(store.shardId(), store.indexSettings());
this.noCFSRatio = parseNoCFSRatio(indexSettings.get(INDEX_COMPOUND_FORMAT, Boolean.toString(store.suggestUseCompoundFile())));
// Default to Lucene's default:
this.noCFSRatio = parseNoCFSRatio(indexSettings.get(INDEX_COMPOUND_FORMAT, Double.toString(TieredMergePolicy.DEFAULT_NO_CFS_RATIO)));
}
public static double parseNoCFSRatio(String noCFSRatio) {

7
src/main/java/org/elasticsearch/index/store/Store.java
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@ -284,13 +284,6 @@ public class Store extends AbstractIndexShardComponent implements Closeable, Ref
directory.renameFile(from, to);
}
/**
* Returns <tt>true</tt> by default.
*/
public boolean suggestUseCompoundFile() {
return false;
}
/**
* Increments the refCount of this Store instance. RefCounts are used to determine when a
* Store can be closed safely, i.e. as soon as there are no more references. Be sure to always call a

12
src/test/java/org/elasticsearch/index/merge/policy/MergePolicySettingsTest.java
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@ -46,7 +46,7 @@ public class MergePolicySettingsTest extends ElasticsearchTestCase {
public void testCompoundFileSettings() throws IOException {
IndexSettingsService service = new IndexSettingsService(new Index("test"), EMPTY_SETTINGS);
assertThat(new TieredMergePolicyProvider(createStore(EMPTY_SETTINGS), service).getMergePolicy().getNoCFSRatio(), equalTo(0.0));
assertThat(new TieredMergePolicyProvider(createStore(EMPTY_SETTINGS), service).getMergePolicy().getNoCFSRatio(), equalTo(0.1));
assertThat(new TieredMergePolicyProvider(createStore(build(true)), service).getMergePolicy().getNoCFSRatio(), equalTo(1.0));
assertThat(new TieredMergePolicyProvider(createStore(build(0.5)), service).getMergePolicy().getNoCFSRatio(), equalTo(0.5));
assertThat(new TieredMergePolicyProvider(createStore(build(1.0)), service).getMergePolicy().getNoCFSRatio(), equalTo(1.0));
@ -58,7 +58,7 @@ public class MergePolicySettingsTest extends ElasticsearchTestCase {
assertThat(new TieredMergePolicyProvider(createStore(build(0)), service).getMergePolicy().getNoCFSRatio(), equalTo(0.0));
assertThat(new TieredMergePolicyProvider(createStore(build(0.0)), service).getMergePolicy().getNoCFSRatio(), equalTo(0.0));
assertThat(new LogByteSizeMergePolicyProvider(createStore(EMPTY_SETTINGS), service).getMergePolicy().getNoCFSRatio(), equalTo(0.0));
assertThat(new LogByteSizeMergePolicyProvider(createStore(EMPTY_SETTINGS), service).getMergePolicy().getNoCFSRatio(), equalTo(0.1));
assertThat(new LogByteSizeMergePolicyProvider(createStore(build(true)), service).getMergePolicy().getNoCFSRatio(), equalTo(1.0));
assertThat(new LogByteSizeMergePolicyProvider(createStore(build(0.5)), service).getMergePolicy().getNoCFSRatio(), equalTo(0.5));
assertThat(new LogByteSizeMergePolicyProvider(createStore(build(1.0)), service).getMergePolicy().getNoCFSRatio(), equalTo(1.0));
@ -70,7 +70,7 @@ public class MergePolicySettingsTest extends ElasticsearchTestCase {
assertThat(new LogByteSizeMergePolicyProvider(createStore(build(0)), service).getMergePolicy().getNoCFSRatio(), equalTo(0.0));
assertThat(new LogByteSizeMergePolicyProvider(createStore(build(0.0)), service).getMergePolicy().getNoCFSRatio(), equalTo(0.0));
assertThat(new LogDocMergePolicyProvider(createStore(EMPTY_SETTINGS), service).getMergePolicy().getNoCFSRatio(), equalTo(0.0));
assertThat(new LogDocMergePolicyProvider(createStore(EMPTY_SETTINGS), service).getMergePolicy().getNoCFSRatio(), equalTo(0.1));
assertThat(new LogDocMergePolicyProvider(createStore(build(true)), service).getMergePolicy().getNoCFSRatio(), equalTo(1.0));
assertThat(new LogDocMergePolicyProvider(createStore(build(0.5)), service).getMergePolicy().getNoCFSRatio(), equalTo(0.5));
assertThat(new LogDocMergePolicyProvider(createStore(build(1.0)), service).getMergePolicy().getNoCFSRatio(), equalTo(1.0));
@ -113,7 +113,7 @@ public class MergePolicySettingsTest extends ElasticsearchTestCase {
{
IndexSettingsService service = new IndexSettingsService(new Index("test"), EMPTY_SETTINGS);
TieredMergePolicyProvider mp = new TieredMergePolicyProvider(createStore(EMPTY_SETTINGS), service);
assertThat(mp.getMergePolicy().getNoCFSRatio(), equalTo(0.0));
assertThat(mp.getMergePolicy().getNoCFSRatio(), equalTo(0.1));
service.refreshSettings(build(1.0));
assertThat(mp.getMergePolicy().getNoCFSRatio(), equalTo(1.0));
@ -128,7 +128,7 @@ public class MergePolicySettingsTest extends ElasticsearchTestCase {
{
IndexSettingsService service = new IndexSettingsService(new Index("test"), EMPTY_SETTINGS);
LogByteSizeMergePolicyProvider mp = new LogByteSizeMergePolicyProvider(createStore(EMPTY_SETTINGS), service);
assertThat(mp.getMergePolicy().getNoCFSRatio(), equalTo(0.0));
assertThat(mp.getMergePolicy().getNoCFSRatio(), equalTo(0.1));
service.refreshSettings(build(1.0));
assertThat(mp.getMergePolicy().getNoCFSRatio(), equalTo(1.0));
@ -143,7 +143,7 @@ public class MergePolicySettingsTest extends ElasticsearchTestCase {
{
IndexSettingsService service = new IndexSettingsService(new Index("test"), EMPTY_SETTINGS);
LogDocMergePolicyProvider mp = new LogDocMergePolicyProvider(createStore(EMPTY_SETTINGS), service);
assertThat(mp.getMergePolicy().getNoCFSRatio(), equalTo(0.0));
assertThat(mp.getMergePolicy().getNoCFSRatio(), equalTo(0.1));
service.refreshSettings(build(1.0));
assertThat(mp.getMergePolicy().getNoCFSRatio(), equalTo(1.0));