make dim files mmapped (#49272)

This change mmaps dim files in HybridDirectory to take advantage of off- heap BKD trees. This is based off of (#48509) via (https://issues.apache.org/jira/browse/LUCENE-8932).
elastic · Nov 19, 2019 · 14d2e79 · 14d2e79
1 parent 2f5acae
commit 14d2e79
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diff --git a/server/src/main/java/org/elasticsearch/index/store/FsDirectoryFactory.java b/server/src/main/java/org/elasticsearch/index/store/FsDirectoryFactory.java
@@ -159,6 +159,7 @@ boolean useDelegate(String name) {
                 case "tim":
                 case "tip":
                 case "cfs":
+                case "dim":
                     return true;
                 default:
                     return false;

diff --git a/server/src/test/java/org/elasticsearch/index/store/FsDirectoryFactoryTests.java b/server/src/test/java/org/elasticsearch/index/store/FsDirectoryFactoryTests.java
@@ -63,6 +63,7 @@ public void testPreload() throws IOException {
             assertTrue(hybridDirectory.useDelegate("foo.tim"));
             assertTrue(hybridDirectory.useDelegate("foo.tip"));
             assertTrue(hybridDirectory.useDelegate("foo.cfs"));
+            assertTrue(hybridDirectory.useDelegate("foo.dim"));
             assertFalse(hybridDirectory.useDelegate("foo.bar"));
             MMapDirectory delegate = hybridDirectory.getDelegate();
             assertThat(delegate, Matchers.instanceOf(FsDirectoryFactory.PreLoadMMapDirectory.class));