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HBase >> mail # user >> Put and Increment atomically


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Pablo Musa 2012-09-03, 20:22
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Re: Put and Increment atomically
Hi Pablo,

It's currently not possible (like you saw).

What's your use case? Maybe there's different/better way to achieve
what you want to do?

J-D

On Mon, Sep 3, 2012 at 1:22 PM, Pablo Musa <[EMAIL PROTECTED]> wrote:
> Hey guys,
> I want to insert new columns into a row:fam and increment 2 of them atomically.
> In other words, I am using columns as entries and I want to count them and their
> sizes.
>
> For example, I want to insert these new columns:
> row1:f1:c1 = h_v_j
> row1:f1:c2 = g_r_w
> row1:f1:c3 = z_l_p
> row1:f1:c4 = n_m_j
>
> *The values are fixed size information which I used '_' as separator above.
>
> But I also want to keep track of how many columns do I have and sum one of
> the information.
> row1:f1:count = Increment(4)
> row1:f1:size = Increment(j+w+p+j)
>
> I can do them separately, send the puts and then send the increments, but
> I would like to know if it is possible to do it atomically.
>
> I did some search and found the link below, but it only talks about put/delete.
> Why not adding increment?
> http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/client/RowMutations.html
>
> I don't know if it is clear enough.
>
> Thanks,
> Pablo