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https://issues.apache.org/jira/browse/ASTERIXDB-3453?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17863663#comment-17863663
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ASF subversion and git services commented on ASTERIXDB-3453:
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Commit 49824f58b68dd6621ba41754e8e07d1cab356c70 in asterixdb's branch
refs/heads/master from Wail Alkowaileet
[ https://gitbox.apache.org/repos/asf?p=asterixdb.git;h=49824f58b6 ]
[ASTERIXDB-3453][STO] Incompressible pages are not written as full pages
- user model changes: no
- storage format changes: no
- interface changes: yes
Details:
Incompressible pages must be written as full pages (i.e., as
page + header) entirely to ensure the position of the cloud
files are in-sync with local files.
Change-Id: Iccebe6fcab375d064825ab2e9343b96daf8afbc6
Reviewed-on: https://asterix-gerrit.ics.uci.edu/c/asterixdb/+/18446
Integration-Tests: Jenkins <[email protected]>
Reviewed-by: Wail Alkowaileet <[email protected]>
Reviewed-by: Murtadha Hubail <[email protected]>
Tested-by: Jenkins <[email protected]>
> Incompressible pages are not written as full pages
> --------------------------------------------------
>
> Key: ASTERIXDB-3453
> URL: https://issues.apache.org/jira/browse/ASTERIXDB-3453
> Project: Apache AsterixDB
> Issue Type: Bug
> Components: STO - Storage
> Affects Versions: 0.9.10
> Reporter: Wail Y. Alkowaileet
> Assignee: Wail Y. Alkowaileet
> Priority: Blocker
> Fix For: 0.9.10
>
>
> Incompressible pages are not written entirely. Although this won't impose an
> issue in a non-cloud deployment, but in a cloud deployment, this would mess
> up the file. The reason is that, in a cloud deployment, writes are
> "append-only". That means, writes' offsets cannot be used to determine the
> write position.
> Thus, if an incompressible page is written and the size of the page is
> smaller than a full page, this could write this page's content at the wrong
> position in the cloud storage – leading to have more bytes in local files
> than in the cloud.
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