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Create separate listener to track local segments file after refresh
Signed-off-by: Ashish Singh <[email protected]>
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96 changes: 96 additions & 0 deletions
96
server/src/main/java/org/opensearch/index/shard/RemoteSegmentTrackerListener.java
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| /* | ||
| * SPDX-License-Identifier: Apache-2.0 | ||
| * | ||
| * The OpenSearch Contributors require contributions made to | ||
| * this file be licensed under the Apache-2.0 license or a | ||
| * compatible open source license. | ||
| */ | ||
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|
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| package org.opensearch.index.shard; | ||
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| import org.apache.logging.log4j.Logger; | ||
| import org.apache.lucene.index.SegmentInfos; | ||
| import org.apache.lucene.search.ReferenceManager; | ||
| import org.apache.lucene.store.Directory; | ||
| import org.apache.lucene.store.FilterDirectory; | ||
| import org.opensearch.common.concurrent.GatedCloseable; | ||
| import org.opensearch.common.logging.Loggers; | ||
| import org.opensearch.index.remote.RemoteRefreshSegmentTracker; | ||
| import org.opensearch.index.store.RemoteSegmentStoreDirectory; | ||
|
|
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| import java.io.IOException; | ||
| import java.util.Collection; | ||
|
|
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| /** | ||
| * This listener updates the remote segment tracker with the segment files of the most recent refresh. This is helpful in | ||
| * determining the lag and hence applying rejection on lagging remote uploads. | ||
| * | ||
| * @opensearch.internal | ||
| */ | ||
| public class RemoteSegmentTrackerListener implements ReferenceManager.RefreshListener { | ||
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| private final Logger logger; | ||
| private final IndexShard indexShard; | ||
| private final RemoteRefreshSegmentTracker segmentTracker; | ||
| private final RemoteSegmentStoreDirectory remoteDirectory; | ||
| private final Directory storeDirectory; | ||
| private long primaryTerm; | ||
|
|
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| public RemoteSegmentTrackerListener(IndexShard indexShard, RemoteRefreshSegmentTracker segmentTracker) { | ||
| this.indexShard = indexShard; | ||
| this.segmentTracker = segmentTracker; | ||
| logger = Loggers.getLogger(getClass(), indexShard.shardId()); | ||
| storeDirectory = indexShard.store().directory(); | ||
| remoteDirectory = (RemoteSegmentStoreDirectory) ((FilterDirectory) ((FilterDirectory) indexShard.remoteStore().directory()) | ||
| .getDelegate()).getDelegate(); | ||
| if (indexShard.routingEntry().primary()) { | ||
| try { | ||
| this.remoteDirectory.init(); | ||
| } catch (IOException e) { | ||
| logger.error("Exception while initialising RemoteSegmentStoreDirectory", e); | ||
| } | ||
| } | ||
| this.primaryTerm = remoteDirectory.getPrimaryTermAtInit(); | ||
| } | ||
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| @Override | ||
| public void beforeRefresh() throws IOException {} | ||
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| @Override | ||
| public void afterRefresh(boolean didRefresh) throws IOException { | ||
| if (didRefresh | ||
| || this.primaryTerm != indexShard.getOperationPrimaryTerm() | ||
| || remoteDirectory.getSegmentsUploadedToRemoteStore().isEmpty()) { | ||
| updateLocalRefreshTimeAndSeqNo(); | ||
| try { | ||
| if (this.primaryTerm != indexShard.getOperationPrimaryTerm()) { | ||
| this.primaryTerm = indexShard.getOperationPrimaryTerm(); | ||
| } | ||
| try (GatedCloseable<SegmentInfos> segmentInfosGatedCloseable = indexShard.getSegmentInfosSnapshot()) { | ||
| Collection<String> localSegmentsPostRefresh = segmentInfosGatedCloseable.get().files(true); | ||
| updateLocalSizeMapAndTracker(localSegmentsPostRefresh); | ||
| } | ||
| } catch (Throwable t) { | ||
| logger.error("Exception in RemoteSegmentTrackerListener.afterRefresh()", t); | ||
| } | ||
| } | ||
| } | ||
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| /** | ||
| * Updates map of file name to size of the input segment files in the segment tracker. Uses {@code storeDirectory.fileLength(file)} to get the size. | ||
| * | ||
| * @param segmentFiles list of segment files that are part of the most recent local refresh. | ||
| */ | ||
| private void updateLocalSizeMapAndTracker(Collection<String> segmentFiles) { | ||
| segmentTracker.updateLatestLocalFileNameLengthMap(segmentFiles, storeDirectory::fileLength); | ||
| } | ||
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| /** | ||
| * Updates the last refresh time and refresh seq no which is seen by local store. | ||
| */ | ||
| private void updateLocalRefreshTimeAndSeqNo() { | ||
| segmentTracker.updateLocalRefreshClockTimeMs(System.currentTimeMillis()); | ||
| segmentTracker.updateLocalRefreshTimeMs(System.nanoTime() / 1_000_000L); | ||
| segmentTracker.updateLocalRefreshSeqNo(segmentTracker.getLocalRefreshSeqNo() + 1); | ||
| } | ||
| } |
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