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https://issues.apache.org/jira/browse/CASSANDRA-5411?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Arya Goudarzi updated CASSANDRA-5411:
-------------------------------------
Description:
Per discussion here:
http://www.mail-archive.com/[email protected]/msg28905.html
Hints are TTLed to lowest gc_grace_seconds. If we have hints that are not
replayed, and the administrator updates schema to have lower gc_grace seconds
on some CF, chances are compactions will delete tombstones and history of
delete gets lost. If the deleted row is in some hints CF, since the TTL is not
updated, chances are it gets replayed and the deleted row comes back to life.
I think it would be nice as part of schema migration, to also update the TTLs
on hints that already exists on any nodes hints column family.
was:
Per discussion here:
http://www.mail-archive.com/[email protected]/msg28905.html
Hits are TTLed to lowest gc_grace_seconds. If we have hints that are not
replayed, and the administrator updates schema to have lower gc_grace seconds
on some CF, chances are compactions will delete tombstones and history of
delete gets lost. If the deleted row is in some hints CF, since the TTL is not
updated, chances are it gets replayed and the deleted row comes back to life.
I think it would be nice as part of schema migration, to also update the TTLs
on hints that already exists on any nodes hints column family.
> Unexpired hints can potentially create previously deleted rows
> --------------------------------------------------------------
>
> Key: CASSANDRA-5411
> URL: https://issues.apache.org/jira/browse/CASSANDRA-5411
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Affects Versions: 1.1.10
> Environment: Ubuntu 10.04
> Reporter: Arya Goudarzi
>
> Per discussion here:
> http://www.mail-archive.com/[email protected]/msg28905.html
> Hints are TTLed to lowest gc_grace_seconds. If we have hints that are not
> replayed, and the administrator updates schema to have lower gc_grace seconds
> on some CF, chances are compactions will delete tombstones and history of
> delete gets lost. If the deleted row is in some hints CF, since the TTL is
> not updated, chances are it gets replayed and the deleted row comes back to
> life.
> I think it would be nice as part of schema migration, to also update the TTLs
> on hints that already exists on any nodes hints column family.
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