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Ariel Weisberg commented on CASSANDRA-9932:
-------------------------------------------
+1. Make sure to file and link a ticket to CASSANDRA-9012.
Hand copied combination of BTreeTest and LongBTreeTest.
||Element| Cov.||
|builder(Comparator, int)| 0%|
|build(Iterable, UpdateFunction)| 0%|
|singleton(Object)| 0%|
|slice(Object[], Comparator, Object, Object, BTree.Dir)| 0%|
|equals(Object[], Object[])|0%|
|depth(Object[])|0%|
|merge(Object[], Object[], Comparator, UpdateFunction)|0%|
|hashCode(Object[])|0%|
|sizeOfStructureOnHeap(Object[])|0%|
|find(Object[], Comparator, Object)|0%|
|replaceInSitu(Object[], Comparator, Object, Object)|0%|
|slice(Object[], Comparator, Object, boolean, Object, boolean, BTree.Dir)|0%|
|build(Iterable, int, UpdateFunction)|54%|
|treeIndexOfKey(Object[], int)| 63%|
|findByIndex(Object[], int)|71%|
|compare(Comparator, Object, Object)|81%|
> Make all partitions btree backed
> --------------------------------
>
> Key: CASSANDRA-9932
> URL: https://issues.apache.org/jira/browse/CASSANDRA-9932
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Reporter: Benedict
> Assignee: Benedict
> Fix For: 3.0.0 rc1
>
>
> Following on from the other btree related refactors, this patch makes all
> partition (and partition-like) objects backed by the same basic structure:
> {{AbstractBTreePartition}}. With two main offshoots:
> {{ImmutableBTreePartition}} and {{AtomicBTreePartition}}
> The main upshot is a 30% net code reduction, meaning better exercise of btree
> code paths and fewer new code paths to go wrong. A secondary upshort is that,
> by funnelling all our comparisons through a btree, there is a higher
> likelihood of icache occupancy and we have only one area to focus delivery of
> improvements for their enjoyment by all.
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