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From "Yingyi Bu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ASTERIXDB-1289) Coordinate generated UUIDs within a cluster
Date Mon, 08 Feb 2016 20:17:39 GMT

    [ https://issues.apache.org/jira/browse/ASTERIXDB-1289?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15137608#comment-15137608
] 

Yingyi Bu commented on ASTERIXDB-1289:
--------------------------------------

Yes, definitely.  
Since we already have cluster-wide unique resource id for storage files, I guess an auto-generated
key in a "to-be-inserted" tuple could consist of Resource_ID,  <the number of tuples in
the resource>.  The tricky part is to get the tuple count from a resource ID because we
do not store that physically...

> Coordinate generated UUIDs within a cluster
> -------------------------------------------
>
>                 Key: ASTERIXDB-1289
>                 URL: https://issues.apache.org/jira/browse/ASTERIXDB-1289
>             Project: Apache AsterixDB
>          Issue Type: Bug
>            Reporter: Michael Blow
>   Original Estimate: 6h
>  Remaining Estimate: 6h
>
> UUIDs are generated by Asterix runtime for certain use cases; the uniqueness of the UUIDs
relies on series of bytes obtained by SecureRandom on each NC.  This could be improved by
having the NCs obtain a unique pool from the CC to guarantee cluster-wide uniqueness.



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