lucene-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Mark Miller (JIRA)" <>
Subject [jira] [Commented] (SOLR-3178) Versioning - optimistic locking
Date Tue, 01 May 2012 02:06:50 GMT


Mark Miller commented on SOLR-3178:

Yeah, it would be nice to offer a wide range of indexing options - I'd really like to see
us offer down to "fire and forget" - the add waits for no response and adds are done locally
and remotely in parallel. AFAIK MongoDB actually does this by default - I don't think we should
do that, but I'm interested in offering a range from that up to full guarantees. 
> Versioning - optimistic locking
> -------------------------------
>                 Key: SOLR-3178
>                 URL:
>             Project: Solr
>          Issue Type: New Feature
>          Components: update
>    Affects Versions: 3.5
>         Environment: All
>            Reporter: Per Steffensen
>            Assignee: Per Steffensen
>              Labels: RDBMS, insert, locking, nosql, optimistic, uniqueKey, update, versioning
>             Fix For: 4.0
>         Attachments: SOLR-3178.patch, SOLR_3173_3178_3382_plus.patch
>   Original Estimate: 168h
>  Remaining Estimate: 168h
> In order increase the ability of Solr to be used as a NoSql database (lots of concurrent
inserts, updates, deletes and queries in the entire lifetime of the index) instead of just
a search index (first: everything indexed (in one thread), after: only queries), I would like
Solr to support versioning to be used for optimistic locking.
> When my intent (see SOLR-3173) is to update an existing document, I will need to provide
a version-number equal to "the version number I got when I fetched the existing document for
update" plus one. If this provided version-number does not correspond to "the newest version-number
of that document at the time of update" plus one, I will get a VersionConflict error. If it
does correspond the document will be updated with the new one, so that "the newest version-number
of that document" is NOW one higher than before the update. Correct but efficient concurrency
> When my intent (see SOLR-3173) is to insert a new document, the version number provided
will not be used - instead a version-number 0 will be used. According to SOLR-3173 insert
will only succeed if a document with the same value on uniqueKey-field does not already exist.
> In general when talking about different versions of "the same document", of course we
need to be able to identify when a document "is the same" - that, per definition, is when
the values of the uniqueKey-fields are equal. 
> The functionality provided by this issue is only really meaningfull when you run with
"updateLog" activated.
> This issue might be solved more or less at the same time as SOLR-3173, and only one single
SVN patch might be given to cover both issues.

This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators:!default.jspa
For more information on JIRA, see:


To unsubscribe, e-mail:
For additional commands, e-mail:

View raw message