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Accumulo, mail # user - Record index within a Table


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Re: Record index within a Table
Josh Elser 2012-12-04, 17:45
I was thinking a little more on the subject, and convinced myself that I
was wrong.

Since many files on disk correspond to a tablet, the best you can get is
the index of a key-value pair in a given file for a tablet. To get a
sorted stream of key-value pairs for this tablet (to compute index
offset for a key in a tablet), a merged read is performed over all of
those files. Local key offset for a file is meaningless as it does not
imply the correct offset for a tablet.

On 12/3/12 9:30 PM, Josh Elser wrote:
>
> Accumulo doesn't expose any internal offsets of Key-Value pairs
> through the API. While it might be able to extrapolate some of this
> knowledge from the underlying structure of Accumulo, that isn't the
> intent of what Accumulo is trying to provide.
>