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Posted to dev@couchdb.apache.org by "Filipe Manana (JIRA)" <ji...@apache.org> on 2011/03/02 14:15:41 UTC

[jira] Commented: (COUCHDB-1081) Proper database header upgrade

    [ https://issues.apache.org/jira/browse/COUCHDB-1081?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13001411#comment-13001411 ] 

Filipe Manana commented on COUCHDB-1081:
----------------------------------------

Just to avoid confusion, the header upgrade procedure is not broken.

The proposed patch just avoids a function clause error when opening a database from more recent versions. Also, updating the disk_version field is not a must (after compaction we'll get an header with the latest version) but it makes it easier to analyze when (from which header/offset) a database file was upgraded (assuming no compaction happened yet).

> Proper database header upgrade
> ------------------------------
>
>                 Key: COUCHDB-1081
>                 URL: https://issues.apache.org/jira/browse/COUCHDB-1081
>             Project: CouchDB
>          Issue Type: Bug
>          Components: Database Core
>            Reporter: Filipe Manana
>            Assignee: Filipe Manana
>         Attachments: COUCHDB-1081.patch
>
>
> After upgrading an old database header, we don't set the disk_version field of the upgraded header to the latest supported version.
> Also, when opening versions from more recent releases, we get a function clause crash instead of throwing an exception with an explicit message informing the version is not supported.

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