[jira] [Commented] (HDDS-3707) UUID can be non unique for a huge samples

["Marton Elek (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HDDS-3707?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17123943#comment-17123943 ] 

Marton Elek commented on HDDS-3707:
-----------------------------------

Thanks to open this [~maobaolong]. I am trying to understand the risk here, but to have the same datanodeId and pipelineId seems to have only a very low chance. I expect 10-90 thousands of datanodeId/containerId, I think the chance for the collision is very-very low.

What is your suggestion, what should be used instead of UUID?

> UUID can be non unique for a huge samples
> -----------------------------------------
>
>                 Key: HDDS-3707
>                 URL: https://issues.apache.org/jira/browse/HDDS-3707
>             Project: Hadoop Distributed Data Store
>          Issue Type: Bug
>          Components: om, Ozone Datanode, SCM
>    Affects Versions: 0.7.0
>            Reporter: maobaolong
>            Priority: Minor
>
> Now, we have used UUID as id for many places, for example, DataNodeId, pipelineId. I believe that it should be pretty less chance to met collision, but, if met the collision, we are in trouble.



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