Anastasia Braginsky commented on HBASE-16608:

Hey [~anoop.hbase],

Thank for the review! I have answered all your comments. Just the issue with 
the MemStoreCompactorIterator working without iterator I will resolve little 
Regarding that you are not getting notifications about my activity on Review 
Board, I do not know what to do with that... 
I have registered to the hbase group, now getting lots of emails about each 
action on the Review Board, but you say it doesn't help... 
Any ideas what should I do?

bq. So as per this patch, we will do flatten for the very first pipeline 
segment only. After that it is either Merge or Compact.. Later we will find a 
better value for this (max segments possible to keep in a pipeline). Am ok for 
this way.

I think you understand it right. To be little more precise, flatten (on its 
own) almost doesn't happen at all (only on tests). 
Upon being pushed to pipeline (still with CSLM) the new immutable segment is 
directly either merged or compiled with the old immutable segment. 
But indeed, later we will find a better value for this (max segments possible 
to keep in a pipeline).


> Introducing the ability to merge ImmutableSegments without copy-compaction or 
> SQM usage
> ---------------------------------------------------------------------------------------
>                 Key: HBASE-16608
>                 URL: https://issues.apache.org/jira/browse/HBASE-16608
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: Anastasia Braginsky
>            Assignee: Anastasia Braginsky
>         Attachments: HBASE-16417-V02.patch, HBASE-16417-V04.patch, 
> HBASE-16417-V06.patch, HBASE-16417-V07.patch

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