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Add OBJECT_CACHE_SIZE env #175

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Merged
merged 1 commit into from
Sep 18, 2019
Merged

Add OBJECT_CACHE_SIZE env #175

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18 changes: 15 additions & 3 deletions ...t/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/INodeKeyedObjects.java
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Original file line number Diff line number Diff line change
Expand Up @@ -58,7 +58,8 @@ public void run() {
}
};

final ScheduledFuture<?> updateHandle = scheduler.scheduleAtFixedRate(updateToDB, 10 * 60, 60 * 60, SECONDS);
final ScheduledFuture<?> updateHandle =
scheduler.scheduleAtFixedRate(updateToDB, 10 * 60, 60 * 60, SECONDS);

scheduler.schedule(
new Runnable() {
Expand All @@ -77,6 +78,16 @@ public static IndexedCache<CompositeKey, INode> getCache() {
if (cache == null) {
concurrentHashSet = ConcurrentHashMap.newKeySet();
BackupSetToDB();

// Assuming each INode has 600 bytes, then
// 10000000 * 600 / 2^30 = 5.58 GB.
// The default object cache has 5.58 GB.
int num = 10000000;
String cacheNum = System.getenv("OBJECT_CACHE_SIZE");
if (cacheNum != null) {
num = Integer.parseInt(cacheNum);
}

// https://github.com/ben-manes/caffeine/wiki/Removal
Caffeine<Object, Object> cfein =
Caffeine.newBuilder()
Expand All @@ -95,14 +106,15 @@ public static IndexedCache<CompositeKey, INode> getCache() {
inode.asDirectory().updateINodeDirectory();
} else {
inode.asFile().updateINodeFile();
FileUnderConstructionFeature uc = inode.asFile().getFileUnderConstructionFeature();
FileUnderConstructionFeature uc =
inode.asFile().getFileUnderConstructionFeature();
if (uc != null) {
uc.updateFileUnderConstruction(inode.getId());
}
}
}
})
.maximumSize(100_000);
.maximumSize(num);
cache =
new IndexedCache.Builder<CompositeKey, INode>()
.withIndex(Long.class, ck -> ck.getK1())
Expand Down