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Posted to oak-commits@jackrabbit.apache.org by mr...@apache.org on 2016/06/20 11:35:16 UTC
svn commit: r1749306 - in /jackrabbit/oak/trunk/oak-core/src:
main/java/org/apache/jackrabbit/oak/plugins/document/
main/java/org/apache/jackrabbit/oak/plugins/document/mongo/
main/java/org/apache/jackrabbit/oak/plugins/document/mongo/replica/
main/jav...
Author: mreutegg
Date: Mon Jun 20 11:35:15 2016
New Revision: 1749306
URL: http://svn.apache.org/viewvc?rev=1749306&view=rev
Log:
OAK-3865: New strategy to optimize secondary reads
Revert change because of test failures (OAK-4486).
Removed:
jackrabbit/oak/trunk/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/mongo/replica/
jackrabbit/oak/trunk/oak-core/src/test/java/org/apache/jackrabbit/oak/plugins/document/mongo/replica/
Modified:
jackrabbit/oak/trunk/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/DocumentMK.java
jackrabbit/oak/trunk/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/NodeDocument.java
jackrabbit/oak/trunk/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/mongo/MongoBlobStore.java
jackrabbit/oak/trunk/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/mongo/MongoDocumentStore.java
jackrabbit/oak/trunk/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/util/Utils.java
jackrabbit/oak/trunk/oak-core/src/test/java/org/apache/jackrabbit/oak/plugins/document/mongo/ReadPreferenceIT.java
Modified: jackrabbit/oak/trunk/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/DocumentMK.java
URL: http://svn.apache.org/viewvc/jackrabbit/oak/trunk/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/DocumentMK.java?rev=1749306&r1=1749305&r2=1749306&view=diff
==============================================================================
--- jackrabbit/oak/trunk/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/DocumentMK.java (original)
+++ jackrabbit/oak/trunk/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/DocumentMK.java Mon Jun 20 11:35:15 2016
@@ -499,7 +499,6 @@ public class DocumentMK {
public static final int DEFAULT_CACHE_STACK_MOVE_DISTANCE = 16;
private DocumentNodeStore nodeStore;
private DocumentStore documentStore;
- private String mongoUri;
private DiffCache diffCache;
private BlobStore blobStore;
private int clusterId = Integer.getInteger("oak.documentMK.clusterId", 0);
@@ -556,8 +555,6 @@ public class DocumentMK {
@Nonnull String name,
int blobCacheSizeMB)
throws UnknownHostException {
- this.mongoUri = uri;
-
DB db = new MongoConnection(uri).getDB(name);
if (!MongoConnection.hasWriteConcern(uri)) {
db.setWriteConcern(MongoConnection.getDefaultWriteConcern(db));
@@ -605,16 +602,6 @@ public class DocumentMK {
}
/**
- * Returns the Mongo URI used in the {@link #setMongoDB(String, String, int)} method.
- *
- * @return the Mongo URI or null if the {@link #setMongoDB(String, String, int)} method hasn't
- * been called.
- */
- public String getMongoUri() {
- return mongoUri;
- }
-
- /**
* Sets a {@link DataSource} to use for the RDB document and blob
* stores.
*
Modified: jackrabbit/oak/trunk/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/NodeDocument.java
URL: http://svn.apache.org/viewvc/jackrabbit/oak/trunk/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/NodeDocument.java?rev=1749306&r1=1749305&r2=1749306&view=diff
==============================================================================
--- jackrabbit/oak/trunk/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/NodeDocument.java (original)
+++ jackrabbit/oak/trunk/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/NodeDocument.java Mon Jun 20 11:35:15 2016
@@ -1326,17 +1326,10 @@ public final class NodeDocument extends
}
NodeDocument getPreviousDocument(String prevId){
+ //Use the maxAge variant such that in case of Mongo call for
+ //previous doc are directed towards replicas first
LOG.trace("get previous document {}", prevId);
- NodeDocument doc = store.find(Collection.NODES, prevId);
- if (doc == null) {
- // In case secondary read preference is used and node is not found
- // then check with primary again as it might happen that node document has not been
- // replicated. We know that document with such an id must exist but possibly dut to
- // replication lag it has not reached to secondary. So in that case read again
- // from primary
- doc = store.find(Collection.NODES, prevId, 0);
- }
- return doc;
+ return store.find(Collection.NODES, prevId, Integer.MAX_VALUE);
}
@Nonnull
Modified: jackrabbit/oak/trunk/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/mongo/MongoBlobStore.java
URL: http://svn.apache.org/viewvc/jackrabbit/oak/trunk/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/mongo/MongoBlobStore.java?rev=1749306&r1=1749305&r2=1749306&view=diff
==============================================================================
--- jackrabbit/oak/trunk/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/mongo/MongoBlobStore.java (original)
+++ jackrabbit/oak/trunk/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/mongo/MongoBlobStore.java Mon Jun 20 11:35:15 2016
@@ -23,8 +23,6 @@ import java.util.concurrent.TimeUnit;
import org.apache.jackrabbit.oak.commons.StringUtils;
import org.apache.jackrabbit.oak.plugins.blob.CachingBlobStore;
-import org.apache.jackrabbit.oak.plugins.document.Document;
-import org.apache.jackrabbit.oak.plugins.document.NodeDocument;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
Modified: jackrabbit/oak/trunk/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/mongo/MongoDocumentStore.java
URL: http://svn.apache.org/viewvc/jackrabbit/oak/trunk/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/mongo/MongoDocumentStore.java?rev=1749306&r1=1749305&r2=1749306&view=diff
==============================================================================
--- jackrabbit/oak/trunk/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/mongo/MongoDocumentStore.java (original)
+++ jackrabbit/oak/trunk/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/mongo/MongoDocumentStore.java Mon Jun 20 11:35:15 2016
@@ -61,7 +61,6 @@ import org.apache.jackrabbit.oak.plugins
import org.apache.jackrabbit.oak.plugins.document.JournalEntry;
import org.apache.jackrabbit.oak.plugins.document.NodeDocument;
import org.apache.jackrabbit.oak.plugins.document.Revision;
-import org.apache.jackrabbit.oak.plugins.document.RevisionVector;
import org.apache.jackrabbit.oak.plugins.document.StableRevisionComparator;
import org.apache.jackrabbit.oak.plugins.document.UpdateOp;
import org.apache.jackrabbit.oak.plugins.document.UpdateOp.Condition;
@@ -71,8 +70,6 @@ import org.apache.jackrabbit.oak.plugins
import org.apache.jackrabbit.oak.plugins.document.cache.CacheChangesTracker;
import org.apache.jackrabbit.oak.plugins.document.cache.CacheInvalidationStats;
import org.apache.jackrabbit.oak.plugins.document.cache.NodeDocumentCache;
-import org.apache.jackrabbit.oak.plugins.document.mongo.replica.LocalChanges;
-import org.apache.jackrabbit.oak.plugins.document.mongo.replica.ReplicaSetInfo;
import org.apache.jackrabbit.oak.plugins.document.locks.NodeDocumentLocks;
import org.apache.jackrabbit.oak.plugins.document.locks.StripedNodeDocumentLocks;
import org.apache.jackrabbit.oak.plugins.document.util.Utils;
@@ -143,12 +140,6 @@ public class MongoDocumentStore implemen
private Clock clock = Clock.SIMPLE;
- private final ReplicaSetInfo replicaInfo;
-
- private RevisionVector mostRecentAccessedRevisions;
-
- private LocalChanges localChanges;
-
private final long maxReplicationLagMillis;
/**
@@ -180,24 +171,6 @@ public class MongoDocumentStore implemen
Long.getLong("oak.mongo.maxQueryTimeMS", TimeUnit.MINUTES.toMillis(1));
/**
- * How often in milliseconds the MongoDocumentStore should estimate the
- * replication lag.
- * <p>
- * Default is 60'000 (one minute).
- */
- private long estimationPullFrequencyMS =
- Long.getLong("oak.mongo.estimationPullFrequencyMS", TimeUnit.SECONDS.toMillis(5));
-
- /**
- * Fallback to the old secondary-routing strategy. Setting this to true
- * disables the optimisation introduced in the OAK-3865.
- * <p>
- * Default is false.
- */
- private boolean fallbackSecondaryStrategy =
- Boolean.getBoolean("oak.mongo.fallbackSecondaryStrategy");
-
- /**
* The number of documents to put into one bulk update.
* <p>
* Default is 30.
@@ -238,18 +211,6 @@ public class MongoDocumentStore implemen
maxReplicationLagMillis = builder.getMaxReplicationLagMillis();
- if (fallbackSecondaryStrategy) {
- replicaInfo = null;
- localChanges = null;
- } else {
- replicaInfo = new ReplicaSetInfo(clock, db, builder.getMongoUri(), estimationPullFrequencyMS, maxReplicationLagMillis, builder.getExecutor());
- Thread replicaInfoThread = new Thread(replicaInfo, "MongoDocumentStore replica set info provider (" + builder.getClusterId() + ")");
- replicaInfoThread.setDaemon(true);
- replicaInfoThread.start();
- localChanges = new LocalChanges();
- replicaInfo.addListener(localChanges);
- }
-
// indexes:
// the _id field is the primary key, so we don't need to define it
@@ -510,7 +471,7 @@ public class MongoDocumentStore implemen
boolean isSlaveOk = false;
boolean docFound = true;
try {
- ReadPreference readPreference = getMongoReadPreference(collection, null, key, docReadPref);
+ ReadPreference readPreference = getMongoReadPreference(collection, Utils.getParentId(key), docReadPref);
if(readPreference.isSlaveOk()){
LOG.trace("Routing call to secondary for fetching [{}]", key);
@@ -519,6 +480,17 @@ public class MongoDocumentStore implemen
DBObject obj = dbCollection.findOne(getByKeyQuery(key).get(), null, null, readPreference);
+ if (obj == null
+ && readPreference.isSlaveOk()) {
+ //In case secondary read preference is used and node is not found
+ //then check with primary again as it might happen that node document has not been
+ //replicated. This is required for case like SplitDocument where the SplitDoc is fetched with
+ //maxCacheAge == Integer.MAX_VALUE which results in readPreference of secondary.
+ //In such a case we know that document with such an id must exist
+ //but possibly dut to replication lag it has not reached to secondary. So in that case read again
+ //from primary
+ obj = dbCollection.findOne(getByKeyQuery(key).get(), null, null, ReadPreference.primary());
+ }
if(obj == null){
docFound = false;
return null;
@@ -527,7 +499,6 @@ public class MongoDocumentStore implemen
if (doc != null) {
doc.seal();
}
- updateLatestAccessedRevs(doc);
return doc;
} finally {
stats.doneFindUncached(watch.elapsed(TimeUnit.NANOSECONDS), collection, key, docFound, isSlaveOk);
@@ -612,7 +583,7 @@ public class MongoDocumentStore implemen
cursor.maxTime(maxQueryTime, TimeUnit.MILLISECONDS);
}
ReadPreference readPreference =
- getMongoReadPreference(collection, parentId, null, getDefaultReadPreference(collection));
+ getMongoReadPreference(collection, parentId, getDefaultReadPreference(collection));
if(readPreference.isSlaveOk()){
isSlaveOk = true;
@@ -627,7 +598,6 @@ public class MongoDocumentStore implemen
for (int i = 0; i < limit && cursor.hasNext(); i++) {
DBObject o = cursor.next();
T doc = convertFromDBObject(collection, o);
- updateLatestAccessedRevs(doc);
list.add(doc);
}
resultSize = list.size();
@@ -800,7 +770,6 @@ public class MongoDocumentStore implemen
if (collection == Collection.NODES) {
NodeDocument newDoc = (NodeDocument) applyChanges(collection, oldDoc, updateOp);
nodesCache.put(newDoc);
- updateLocalChanges(newDoc);
}
oldDoc.seal();
} else if (upsert) {
@@ -808,7 +777,6 @@ public class MongoDocumentStore implemen
NodeDocument doc = (NodeDocument) collection.newDocument(this);
UpdateUtils.applyChanges(doc, updateOp);
nodesCache.putIfAbsent(doc);
- updateLocalChanges(doc);
}
} else {
// updateOp without conditions and not an upsert
@@ -971,11 +939,6 @@ public class MongoDocumentStore implemen
docsToCache.add(newDoc);
}
}
-
- for (NodeDocument doc : docsToCache) {
- updateLocalChanges(doc);
- }
-
nodesCache.putNonConflictingDocs(tracker, docsToCache);
}
oldDocs.keySet().removeAll(bulkResult.failedUpdates);
@@ -1141,7 +1104,6 @@ public class MongoDocumentStore implemen
if (collection == Collection.NODES) {
for (T doc : docs) {
nodesCache.putIfAbsent((NodeDocument) doc);
- updateLocalChanges((NodeDocument) doc);
}
}
insertSuccess = true;
@@ -1246,8 +1208,7 @@ public class MongoDocumentStore implemen
}
DocumentReadPreference getReadPreference(int maxCacheAge){
- long lag = fallbackSecondaryStrategy ? maxReplicationLagMillis : replicaInfo.getLag();
- if(maxCacheAge >= 0 && maxCacheAge < lag) {
+ if(maxCacheAge >= 0 && maxCacheAge < maxReplicationLagMillis) {
return DocumentReadPreference.PRIMARY;
} else if(maxCacheAge == Integer.MAX_VALUE){
return DocumentReadPreference.PREFER_SECONDARY;
@@ -1260,10 +1221,9 @@ public class MongoDocumentStore implemen
return col == Collection.NODES ? DocumentReadPreference.PREFER_SECONDARY_IF_OLD_ENOUGH : DocumentReadPreference.PRIMARY;
}
- <T extends Document> ReadPreference getMongoReadPreference(@Nonnull Collection<T> collection,
- @Nullable String parentId,
- @Nullable String documentId,
- @Nonnull DocumentReadPreference preference) {
+ <T extends Document> ReadPreference getMongoReadPreference(Collection<T> collection,
+ String parentId,
+ DocumentReadPreference preference) {
switch(preference){
case PRIMARY:
return ReadPreference.primary();
@@ -1276,37 +1236,23 @@ public class MongoDocumentStore implemen
return ReadPreference.primary();
}
- boolean secondarySafe;
- if (fallbackSecondaryStrategy) {
- // This is not quite accurate, because ancestors
+ // read from primary unless parent has not been modified
+ // within replication lag period
+ ReadPreference readPreference = ReadPreference.primary();
+ if (parentId != null) {
+ long replicationSafeLimit = getTime() - maxReplicationLagMillis;
+ NodeDocument cachedDoc = nodesCache.getIfPresent(parentId);
+ // FIXME: this is not quite accurate, because ancestors
// are updated in a background thread (_lastRev). We
// will need to revise this for low maxReplicationLagMillis
// values
- long replicationSafeLimit = getTime() - maxReplicationLagMillis;
+ if (cachedDoc != null && !cachedDoc.hasBeenModifiedSince(replicationSafeLimit)) {
- if (parentId == null) {
- secondarySafe = false;
- } else {
//If parent has been modified loooong time back then there children
//would also have not be modified. In that case we can read from secondary
- NodeDocument cachedDoc = nodesCache.getIfPresent(parentId);
- secondarySafe = cachedDoc != null && !cachedDoc.hasBeenModifiedSince(replicationSafeLimit);
+ readPreference = getConfiguredReadPreference(collection);
}
- } else {
- secondarySafe = true;
- secondarySafe &= collection == Collection.NODES;
- secondarySafe &= documentId == null || !localChanges.mayContain(documentId);
- secondarySafe &= parentId == null || !localChanges.mayContainChildrenOf(parentId);
- secondarySafe &= mostRecentAccessedRevisions == null || replicaInfo.isMoreRecentThan(mostRecentAccessedRevisions);
}
-
- ReadPreference readPreference;
- if (secondarySafe) {
- readPreference = getConfiguredReadPreference(collection);
- } else {
- readPreference = ReadPreference.primary();
- }
-
return readPreference;
default:
throw new IllegalArgumentException("Unsupported usage " + preference);
@@ -1381,9 +1327,6 @@ public class MongoDocumentStore implemen
@Override
public void dispose() {
- if (replicaInfo != null) {
- replicaInfo.stop();
- }
nodes.getDB().getMongo().close();
try {
nodesCache.close();
@@ -1617,27 +1560,6 @@ public class MongoDocumentStore implemen
return diff;
}
- private synchronized <T extends Document> void updateLatestAccessedRevs(T doc) {
- if (doc instanceof NodeDocument) {
- RevisionVector accessedRevs = new RevisionVector(((NodeDocument) doc).getLastRev().values());
- RevisionVector previousValue = mostRecentAccessedRevisions;
- if (mostRecentAccessedRevisions == null) {
- mostRecentAccessedRevisions = accessedRevs;
- } else {
- mostRecentAccessedRevisions = mostRecentAccessedRevisions.pmax(accessedRevs);
- }
- if (LOG.isDebugEnabled() && !mostRecentAccessedRevisions.equals(previousValue)) {
- LOG.debug("Most recent accessed revisions: {}", mostRecentAccessedRevisions);
- }
- }
- }
-
- private void updateLocalChanges(NodeDocument doc) {
- if (localChanges != null) {
- localChanges.add(doc.getId(), doc.getLastRev().values());
- }
- }
-
private static class BulkUpdateResult {
private final Set<String> failedUpdates;
Modified: jackrabbit/oak/trunk/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/util/Utils.java
URL: http://svn.apache.org/viewvc/jackrabbit/oak/trunk/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/util/Utils.java?rev=1749306&r1=1749305&r2=1749306&view=diff
==============================================================================
--- jackrabbit/oak/trunk/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/util/Utils.java (original)
+++ jackrabbit/oak/trunk/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/util/Utils.java Mon Jun 20 11:35:15 2016
@@ -759,21 +759,6 @@ public class Utils {
}
/**
- * Returns true if all the revisions in the {@code a} greater or equals
- * to their counterparts in {@code b}. If {@code b} contains revisions
- * for cluster nodes that are not present in {@code a}, return false.
- *
- * @param a
- * @param b
- * @return true if all the revisions in the {@code a} are at least
- * as recent as their counterparts in the {@code b}
- */
- public static boolean isGreaterOrEquals(@Nonnull RevisionVector a,
- @Nonnull RevisionVector b) {
- return a.pmax(b).equals(a);
- }
-
- /**
* Wraps the given iterable and aborts iteration over elements when the
* predicate on an element evaluates to {@code false}.
*
Modified: jackrabbit/oak/trunk/oak-core/src/test/java/org/apache/jackrabbit/oak/plugins/document/mongo/ReadPreferenceIT.java
URL: http://svn.apache.org/viewvc/jackrabbit/oak/trunk/oak-core/src/test/java/org/apache/jackrabbit/oak/plugins/document/mongo/ReadPreferenceIT.java?rev=1749306&r1=1749305&r2=1749306&view=diff
==============================================================================
--- jackrabbit/oak/trunk/oak-core/src/test/java/org/apache/jackrabbit/oak/plugins/document/mongo/ReadPreferenceIT.java (original)
+++ jackrabbit/oak/trunk/oak-core/src/test/java/org/apache/jackrabbit/oak/plugins/document/mongo/ReadPreferenceIT.java Mon Jun 20 11:35:15 2016
@@ -54,6 +54,7 @@ public class ReadPreferenceIT extends Ab
replicationLag = TimeUnit.SECONDS.toMillis(10);
mongoConnection = connectionFactory.getConnection();
mk = new DocumentMK.Builder()
+ .setMaxReplicationLag(replicationLag, TimeUnit.MILLISECONDS)
.setMongoDB(mongoConnection.getDB())
.setClusterId(1)
.setLeaseCheck(false)
@@ -82,27 +83,27 @@ public class ReadPreferenceIT extends Ab
@Test
public void testMongoReadPreferencesDefault() throws Exception{
assertEquals(ReadPreference.primary(),
- mongoDS.getMongoReadPreference(NODES,"foo", null, DocumentReadPreference.PRIMARY));
+ mongoDS.getMongoReadPreference(NODES,"foo", DocumentReadPreference.PRIMARY));
assertEquals(ReadPreference.primaryPreferred(),
- mongoDS.getMongoReadPreference(NODES,"foo", null, DocumentReadPreference.PREFER_PRIMARY));
+ mongoDS.getMongoReadPreference(NODES,"foo", DocumentReadPreference.PREFER_PRIMARY));
//By default Mongo read preference is primary
assertEquals(ReadPreference.primary(),
- mongoDS.getMongoReadPreference(NODES,"foo", null, DocumentReadPreference.PREFER_SECONDARY));
+ mongoDS.getMongoReadPreference(NODES,"foo", DocumentReadPreference.PREFER_SECONDARY));
//Change the default and assert again
mongoDS.getDBCollection(NODES).getDB().setReadPreference(ReadPreference.secondary());
assertEquals(ReadPreference.secondary(),
- mongoDS.getMongoReadPreference(NODES,"foo", null, DocumentReadPreference.PREFER_SECONDARY));
+ mongoDS.getMongoReadPreference(NODES,"foo", DocumentReadPreference.PREFER_SECONDARY));
//for case where parent age cannot be determined the preference should be primary
assertEquals(ReadPreference.primary(),
- mongoDS.getMongoReadPreference(NODES,"foo", null, DocumentReadPreference.PREFER_SECONDARY_IF_OLD_ENOUGH));
+ mongoDS.getMongoReadPreference(NODES,"foo", DocumentReadPreference.PREFER_SECONDARY_IF_OLD_ENOUGH));
//For collection other than NODES always primary
assertEquals(ReadPreference.primary(),
- mongoDS.getMongoReadPreference(SETTINGS,"foo", null, DocumentReadPreference.PREFER_SECONDARY_IF_OLD_ENOUGH));
+ mongoDS.getMongoReadPreference(SETTINGS,"foo", DocumentReadPreference.PREFER_SECONDARY_IF_OLD_ENOUGH));
}
@@ -123,7 +124,7 @@ public class ReadPreferenceIT extends Ab
//For modifiedTime < replicationLag primary must be used
assertEquals(ReadPreference.primary(),
- mongoDS.getMongoReadPreference(NODES,parentId, null, DocumentReadPreference.PREFER_SECONDARY_IF_OLD_ENOUGH));
+ mongoDS.getMongoReadPreference(NODES,parentId, DocumentReadPreference.PREFER_SECONDARY_IF_OLD_ENOUGH));
//Going into future to make parent /x old enough
clock.waitUntil(Revision.getCurrentTimestamp() + replicationLag);
@@ -131,7 +132,7 @@ public class ReadPreferenceIT extends Ab
//For old modified nodes secondaries should be preferred
assertEquals(testPref,
- mongoDS.getMongoReadPreference(NODES, parentId, null, DocumentReadPreference.PREFER_SECONDARY_IF_OLD_ENOUGH));
+ mongoDS.getMongoReadPreference(NODES, parentId, DocumentReadPreference.PREFER_SECONDARY_IF_OLD_ENOUGH));
}
@Test