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Include file cache stats in node stats response (#6333)
This change exposes the file cache stats as part the node stats API response. Signed-off-by: Rabi Panda <adnapibar@gmail.com>
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171 changes: 171 additions & 0 deletions
171
server/src/main/java/org/opensearch/index/store/remote/filecache/FileCacheStats.java
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,171 @@ | ||
| /* | ||
| * 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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| package org.opensearch.index.store.remote.filecache; | ||
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| import org.opensearch.common.io.stream.StreamInput; | ||
| import org.opensearch.common.io.stream.StreamOutput; | ||
| import org.opensearch.common.io.stream.Writeable; | ||
| import org.opensearch.common.unit.ByteSizeValue; | ||
| import org.opensearch.core.xcontent.ToXContentFragment; | ||
| import org.opensearch.core.xcontent.XContentBuilder; | ||
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| import java.io.IOException; | ||
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| /** | ||
| * Statistics on file cache | ||
| * | ||
| * @opensearch.internal | ||
| */ | ||
| public class FileCacheStats implements Writeable, ToXContentFragment { | ||
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| private final long timestamp; | ||
| private final long active; | ||
| private final long total; | ||
| private final long used; | ||
| private final long evicted; | ||
| private final long removed; | ||
| private final long replaced; | ||
| private final long hits; | ||
| private final long miss; | ||
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| public FileCacheStats( | ||
| final long timestamp, | ||
| final long active, | ||
| final long total, | ||
| final long used, | ||
| final long evicted, | ||
| final long removed, | ||
| final long replaced, | ||
| final long hits, | ||
| final long miss | ||
| ) { | ||
| this.timestamp = timestamp; | ||
| this.active = active; | ||
| this.total = total; | ||
| this.used = used; | ||
| this.evicted = evicted; | ||
| this.removed = removed; | ||
| this.replaced = replaced; | ||
| this.hits = hits; | ||
| this.miss = miss; | ||
| } | ||
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| public FileCacheStats(final StreamInput in) throws IOException { | ||
| this.timestamp = in.readLong(); | ||
| this.active = in.readLong(); | ||
| this.total = in.readLong(); | ||
| this.used = in.readLong(); | ||
| this.evicted = in.readLong(); | ||
| this.removed = in.readLong(); | ||
| this.replaced = in.readLong(); | ||
| this.hits = in.readLong(); | ||
| this.miss = in.readLong(); | ||
| } | ||
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| public static short calculatePercentage(long used, long max) { | ||
| return max <= 0 ? 0 : (short) (Math.round((100d * used) / max)); | ||
| } | ||
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| @Override | ||
| public void writeTo(final StreamOutput out) throws IOException { | ||
| out.writeLong(timestamp); | ||
| out.writeLong(active); | ||
| out.writeLong(total); | ||
| out.writeLong(used); | ||
| out.writeLong(evicted); | ||
| out.writeLong(removed); | ||
| out.writeLong(replaced); | ||
| out.writeLong(hits); | ||
| out.writeLong(miss); | ||
| } | ||
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| public long getTimestamp() { | ||
| return timestamp; | ||
| } | ||
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| public ByteSizeValue getTotal() { | ||
| return new ByteSizeValue(total); | ||
| } | ||
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| public ByteSizeValue getActive() { | ||
| return new ByteSizeValue(active); | ||
| } | ||
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| public short getActivePercent() { | ||
| return calculatePercentage(active, used); | ||
| } | ||
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| public ByteSizeValue getUsed() { | ||
| return new ByteSizeValue(used); | ||
| } | ||
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| public short getUsedPercent() { | ||
| return calculatePercentage(getUsed().getBytes(), total); | ||
| } | ||
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| public ByteSizeValue getEvicted() { | ||
| return new ByteSizeValue(evicted); | ||
| } | ||
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| public ByteSizeValue getRemoved() { | ||
| return new ByteSizeValue(removed); | ||
| } | ||
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| public long getReplacedCount() { | ||
| return replaced; | ||
| } | ||
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| public long getCacheHits() { | ||
| return hits; | ||
| } | ||
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| public long getCacheMiss() { | ||
| return miss; | ||
| } | ||
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| @Override | ||
| public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException { | ||
| builder.startObject(Fields.FILE_CACHE); | ||
| builder.field(Fields.TIMESTAMP, getTimestamp()); | ||
| builder.humanReadableField(Fields.ACTIVE_IN_BYTES, Fields.ACTIVE, getActive()); | ||
| builder.humanReadableField(Fields.TOTAL_IN_BYTES, Fields.TOTAL, getTotal()); | ||
| builder.humanReadableField(Fields.USED_IN_BYTES, Fields.USED, getUsed()); | ||
| builder.humanReadableField(Fields.EVICTED_IN_BYTES, Fields.EVICTED, getEvicted()); | ||
| builder.humanReadableField(Fields.REMOVED_IN_BYTES, Fields.REMOVED, getRemoved()); | ||
| builder.field(Fields.REPLACED_COUNT, getReplacedCount()); | ||
| builder.field(Fields.ACTIVE_PERCENT, getActivePercent()); | ||
| builder.field(Fields.USED_PERCENT, getUsedPercent()); | ||
| builder.field(Fields.CACHE_HITS, getCacheHits()); | ||
| builder.field(Fields.CACHE_MISS, getCacheMiss()); | ||
| builder.endObject(); | ||
| return builder; | ||
| } | ||
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| static final class Fields { | ||
| static final String FILE_CACHE = "file_cache"; | ||
| static final String TIMESTAMP = "timestamp"; | ||
| static final String ACTIVE = "active"; | ||
| static final String ACTIVE_IN_BYTES = "active_in_bytes"; | ||
| static final String USED = "used"; | ||
| static final String USED_IN_BYTES = "used_in_bytes"; | ||
| static final String EVICTED = "evicted"; | ||
| static final String EVICTED_IN_BYTES = "evicted_in_bytes"; | ||
| static final String REMOVED = "removed"; | ||
| static final String REMOVED_IN_BYTES = "removed_in_bytes"; | ||
| static final String REPLACED_COUNT = "replaced_count"; | ||
| static final String TOTAL = "total"; | ||
| static final String TOTAL_IN_BYTES = "total_in_bytes"; | ||
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| static final String ACTIVE_PERCENT = "active_percent"; | ||
| static final String USED_PERCENT = "used_percent"; | ||
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| static final String CACHE_HITS = "cache_hits"; | ||
| static final String CACHE_MISS = "cache_miss"; | ||
| } | ||
| } |
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