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Replace nextPosToSearchFrom with lowestPossiblyFreeChunk semantically, that allows to avoid searching free chunks though a full tier, when segment is tiered, again and again. Also, make chunk block reallocation in innerDefaultReplaceValue() and putValueDeletedEntry() check it doesn't overflow actualChunksPerSegmentTier

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leventov
2015-12-07 07:20:47 +03:00
parent 82988e7435
commit 2f58bfb399
15 changed files with 125 additions and 138 deletions
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src/main/java/net/openhft/chronicle/hash/ChronicleHashBuilder.java
+11 -10
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@@ -318,10 +318,11 @@ public interface ChronicleHashBuilder<K, H extends ChronicleHash<K, ?, ?, ?>,
* attacker might do this), this segment is obviously going to be tiered.
*
* <p>This configuration affects the actual number of segments, if {@link #entries(long)} and
* {@link #entriesPerSegment(long)} or {@link #actualChunksPerSegment(long)} are configured. It
* affects the actual number of entries/chunks per segment, if {@link #entries(long)} and
* {@link #actualSegments(int)} are configured. If all 4 configurations, mentioned in this
* paragraph, are specified, {@code nonTieredSegmentsPercentile} is irrelevant.
* {@link #entriesPerSegment(long)} or {@link #actualChunksPerSegmentTier(long)} are configured.
* It affects the actual number of entries per segment/chunks per segment tier, if {@link
* #entries(long)} and {@link #actualSegments(int)} are configured. If all 4 configurations,
* mentioned in this paragraph, are specified, {@code nonTieredSegmentsPercentile} doesn't make
* any effect.
*
* <p>Default value is 0.99999, i. e. if hash code distribution of the keys is good, only one
* segment of 100K is tiered on average. If your segment size is small and you want to improve
@@ -344,7 +345,7 @@ public interface ChronicleHashBuilder<K, H extends ChronicleHash<K, ?, ?, ?>,
* <p>This is a <a href="#low-level-config">low-level configuration</a>.
*
* @param entriesPerSegment the actual maximum number entries per segment in the
* hash containers, created by this builder
* hash containers, created by this builder
* @return this builder back
* @see #entries(long)
* @see #actualSegments(int)
@@ -352,17 +353,17 @@ public interface ChronicleHashBuilder<K, H extends ChronicleHash<K, ?, ?, ?>,
B entriesPerSegment(long entriesPerSegment);
/**
* Configures the actual number of chunks, that will be reserved for any single segment of the
* hash containers, created by this builder. This configuration is a lower-level version of
* Configures the actual number of chunks, that will be reserved for any single segment tier of
* the hash containers, created by this builder. This configuration is a lower-level version of
* {@link #entriesPerSegment(long)}. Makes sense only if {@link #actualChunkSize(int)},
* {@link #actualSegments(int)} and {@link #entriesPerSegment(long)} are also configured
* manually.
*
* @param actualChunksPerSegment the actual number of segments, reserved per segment in the
* hash containers, created by this builder
* @param actualChunksPerSegmentTier the actual number of chunks, reserved per segment tier in
* the hash containers, created by this builder
* @return this builder back
*/
B actualChunksPerSegment(long actualChunksPerSegment);
B actualChunksPerSegmentTier(long actualChunksPerSegmentTier);
/**
* Configures the actual number of segments in the hash containers, created by this builder.