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From Dave Latham <lat...@davelink.net>
Subject Re: removing cells in minor compaction
Date Mon, 19 Jun 2017 15:27:51 GMT
And for any of the cases - if not, then why not?  Because that hasn't been
implemented, or there's an actual reason that HBase would not want to do it?
With reads for a custom time range, it's possible to still read data that
is waiting to be GCed from one of the above mechanisms and will disappear
after that happens.  Doing the GC during minor compactions as well as major
ones would change that visibility window, but doesn't seem to change that
odd behavior that is there to begin with.


On Wed, Jun 14, 2017 at 5:51 PM, Dave Latham <latham@davelink.net> wrote:

> What cells, if any, are removed during minor compactions?
>
> Cells that
> (a) are beyond the TTL?
> (b) are shadowed by a delete marker? (from the files compacted)
> (c) are shadowed by newer versions? (assuming numVersions configured < num
> versions of the cell found)
>

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