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https://issues.apache.org/jira/browse/IGNITE-21987?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ivan Bessonov updated IGNITE-21987:
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Description:
This issue applies to aimem/aipersist primarily. Optimization for rocksdb might
be done separately.
* add new method to SortedIndexStorage, like "readOnlyScan", that returns a
simple cursor
* in the implementation we should use alternative cursor implementation for RO
scans - it should delegate calls to B+Tree cursor
* reuse existing tests where possible
* call new method where necessary (PartitionReplicaListener#scanSortedIndex)
was:
This issue applies to aimem/aipersist primarily. Optimization for rocksdb might
be done separately.
* add new flag RO_SCAN to SortedIndexStorage
* in the implementation we should use alternative cursor implementation for RO
scans - it should delegate calls to B+Tree cursor, and "peek" should throw an
"UnsupportedOperationException"
* for "rocksdb" it shouldn't refresh the iterator all the time. "peek" should
also throw exceptions
* reuse existing tests
* pass new RO_SCAN flag into a method where it's necessary
> Optimize RO scan in sorted indexes
> ----------------------------------
>
> Key: IGNITE-21987
> URL: https://issues.apache.org/jira/browse/IGNITE-21987
> Project: Ignite
> Issue Type: Improvement
> Reporter: Ivan Bessonov
> Priority: Major
> Labels: ignite-3
>
> This issue applies to aimem/aipersist primarily. Optimization for rocksdb
> might be done separately.
> * add new method to SortedIndexStorage, like "readOnlyScan", that returns a
> simple cursor
> * in the implementation we should use alternative cursor implementation for
> RO scans - it should delegate calls to B+Tree cursor
> * reuse existing tests where possible
> * call new method where necessary (PartitionReplicaListener#scanSortedIndex)
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