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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 updated IGNITE-26622:
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Description: 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.
> 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
> 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.
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