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From "Matthieu Morel (Assigned) (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (S4-42) Optional recovery of expired and checkpointed PEs.
Date Thu, 01 Mar 2012 17:41:59 GMT

     [ https://issues.apache.org/jira/browse/S4-42?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Matthieu Morel reassigned S4-42:
--------------------------------

    Assignee: Matthieu Morel
    
> Optional recovery of expired and checkpointed PEs.
> --------------------------------------------------
>
>                 Key: S4-42
>                 URL: https://issues.apache.org/jira/browse/S4-42
>             Project: Apache S4
>          Issue Type: New Feature
>    Affects Versions: 0.4
>            Reporter: Matthieu Morel
>            Assignee: Matthieu Morel
>             Fix For: 0.4
>
>
> S4 provides a caching mechanism for PEs, and PEs can be assigned a time to live. After
that time, the PE instance is removed from the cache and may be garbage collected.
> When combining with the checkpointing mechanism, expired but checkpointed PEs are restored
from a former checkpoint.
> This may or may not be desired, depending on the use case. Therefore we must provide
an option to restore - or not - the state of an expired but checkpointed PE.

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