Best practices for updates

Daniel Langevin dan.langevin at lifebooker.com
Thu Nov 18 16:34:46 EST 2010


We are considering using Riak and I am looking for some advice on best
practices for updating a large number of records.  Our problem is that we
have a large number of unique sets of results, each of which represent a
schedule for multiple people on a particular day or set of days.

For example, we would have  a result set for Mondays from 11/01 - 11/28 and
another for 11/29 and then a third on Mondays from 11/30 onwards if one
person's schedule was edited for 11/29.

So when a person's schedule changes, we need to update the related result
sets.  The issue is that there are likely to be a large number of result
sets that need to be updated for each change to a person's schedule and I
would like to process them in parallel.  From what I have seen, the only way
to do this is to write a MapReduce (or map really I guess) function in
Erlang, though the forum thread I found seemed to discourage this approach.
Is that correct or am I missing something?  This seems like a relatively
common use-case for sharded data, so I am hoping that Riak offers a good
solution for us.

Thanks in advance,

Dan Langevin
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