> 
>> and updates could be scattered all over
>> before compaction?
> 
> No, updates to a given row will be still be in a single sstable.
> 
> 

Can you please explain little more? You mean that if Level 1 file contains
range from 1-100 all the updates would still go in that file?

The link on leveldb says:



> The compaction picks a file from level L and all overlapping files from
> the next level L+1
> 

If all updates go in the same sstables then how do overlapping files get
generated. By overlapping I am assuming it means new or updated value for a
given key exists in multiple files?

Thanks for the explanation

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