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https://issues.apache.org/jira/browse/ASTERIXDB-3389?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17842176#comment-17842176
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ASF subversion and git services commented on ASTERIXDB-3389:
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Commit ebde8c9f20297b8c958c33457ad64d3bbfcff722 in asterixdb's branch
refs/heads/master from Wail Alkowaileet
[ https://gitbox.apache.org/repos/asf?p=asterixdb.git;h=ebde8c9f20 ]
[ASTERIXDB-3389][STO] Prep. columnar datasets for disk caching
- user model changes: no
- storage format changes: yes
- interface changes: yes
Details:
- Several modifications in columnar APIs to accommodate
disk caching
- Pass read/write buffer cache context to LSMColumnBTree
bulkloader and cursors
- Some refactoring in hyracks-cloud API (ASTERIXDB-3375)
Storage changes:
- Store the length (in bytes) of the mega leaf node in
Page0 instead of the of the number of pages
Change-Id: Iababcc5fc1d4e5e2de36f9b26c3f86ffabfb4e54
Reviewed-on: https://asterix-gerrit.ics.uci.edu/c/asterixdb/+/18255
Integration-Tests: Jenkins <jenk...@fulliautomatix.ics.uci.edu>
Tested-by: Jenkins <jenk...@fulliautomatix.ics.uci.edu>
Reviewed-by: Wail Alkowaileet <wael....@gmail.com>
Reviewed-by: Murtadha Hubail <mhub...@apache.org>
> Allow caching and evicting pages of columnar collection in cloud deployment
> ---------------------------------------------------------------------------
>
> Key: ASTERIXDB-3389
> URL: https://issues.apache.org/jira/browse/ASTERIXDB-3389
> Project: Apache AsterixDB
> Issue Type: Improvement
> Components: STO - Storage
> Affects Versions: 0.9.10
> Reporter: Wail Y. Alkowaileet
> Assignee: Wail Y. Alkowaileet
> Priority: Major
> Labels: triaged
> Fix For: 0.9.10
>
>
> In a cloud deployment, columnar collections will not be downloaded as we
> currently do. Instead, only pages of the requested columns will be brought up
> from the cloud. On disk pressure, those pages can be evicted (given some
> eviction policy/criteria).
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