lucene-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Scott Blum (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-6760) New optimized DistributedQueue implementation for overseer
Date Sat, 22 Aug 2015 17:14:45 GMT

    [ https://issues.apache.org/jira/browse/SOLR-6760?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14708094#comment-14708094
] 

Scott Blum commented on SOLR-6760:
----------------------------------

Gregory, glad you're thinking about this.  This kind of discussion is just what I was hoping
for when I wrote "I think someone should go back and analyze the true needs there and figure
out if there's something better we can do." :)

> New optimized DistributedQueue implementation for overseer
> ----------------------------------------------------------
>
>                 Key: SOLR-6760
>                 URL: https://issues.apache.org/jira/browse/SOLR-6760
>             Project: Solr
>          Issue Type: Improvement
>          Components: SolrCloud
>            Reporter: Noble Paul
>            Assignee: Shalin Shekhar Mangar
>             Fix For: Trunk, 5.4
>
>         Attachments: SOLR-6760-branch_5x.patch, SOLR-6760.patch, SOLR-6760.patch, SOLR-6760.patch,
SOLR-6760.patch, deadlock.patch
>
>
> Currently the DQ works as follows
> * read all items in the directory
> * sort them all 
> * take the head and return it and discard everything else
> * rinse and repeat
> This works well when we have only a handful of items in the Queue. If the items in the
queue is much larger (in tens of thousands) , this is counterproductive
> As the overseer queue is a multiple producers + single consumer queue, We can read them
all in bulk  and before processing each item , just do a zk.exists(itemname) and if all is
well we don't need to do the fetch all + sort thing again



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscribe@lucene.apache.org
For additional commands, e-mail: dev-help@lucene.apache.org


Mime
View raw message