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https://issues.apache.org/jira/browse/HBASE-8927?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13706444#comment-13706444
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Sergey Shelukhin commented on HBASE-8927:
-----------------------------------------

[~stack] agree on first, but for general use (like e.g. measuring ttl 
expiration, how long things took for normal ops, and such) having a complex ts 
generation seems sillier ;) I'd do nano on case by case basis for 
non-timestamps.

[~enis] hardware clocks do go back on faulty motherboards... also Windows does 
adjust the clock backwards from the time server if it drifts forwards. Linux 
ntpd can also do that unless explicitly disabled.

[~eclark] but does it matter across rows?
                
> Use nano time instead of mili time everywhere
> ---------------------------------------------
>
>                 Key: HBASE-8927
>                 URL: https://issues.apache.org/jira/browse/HBASE-8927
>             Project: HBase
>          Issue Type: Bug
>            Reporter: stack
>         Attachments: 8927.txt
>
>
> Less collisions and we are paying the price of a long anyways so might as 
> well fill it.

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