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https://issues.apache.org/jira/browse/IGNITE-26622?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Aleksandr Polovtsev reassigned IGNITE-26622:
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Assignee: Filipp Shergalis
> Add recently opened segment file cache
> --------------------------------------
>
> Key: IGNITE-26622
> URL: https://issues.apache.org/jira/browse/IGNITE-26622
> Project: Ignite
> Issue Type: Improvement
> Reporter: Aleksandr Polovtsev
> Assignee: Filipp Shergalis
> Priority: Major
> Labels: ignite-3
>
> When reading data from segment files, we call `SegmentFile.openExisting`,
> which "mmaps" the whole file into memory. This is not very effective when
> reading consecutive data from the same file over and over again. We need to
> introduce some kind of a cache, that will ideally allow us to call "mmap"
> only once. Or the code should be reworked to use regular file API to read
> bytes directly.
> The same approach can be extended to reading from index files.
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