Also, you might not need a notification when the Riak operation succeed
if you set a default high N value, let's say, for 5 nodes, N value = 3
should give you a good safe bet, meaning, Riak client will return
successfully when the key was written to at least 3 nodes, so it only
leaves with the rollback policy implementation.
I know I'm suggesting the opposite (assume things went OK and take
action when they go wrong)
If that makes sense for your application.
Guido.
On 04/04/13 15:33, Guido Medina wrote:
At least on two-phase commit enabled environment you can implement the
rollback to "undo" your action, you expect things to go right and a
very small % to go wrong, so implementing a rollback policy isn't such
a bad idea, I had to do the same years ago for a payment client, when
things went wrong on our DB, we send a revert payment, since once the
payment was gone, it had no transactional behaviour so we had to
implement a rollback policy.
Hope that helps,
Guido.
On 04/04/13 15:01, Sean Cribbs wrote:
Brisa,
You cannot simulate transactions, really (see also
http://aphyr.com/posts/254-burn-the-library). However, if you want to
receive notifications and take action when something happens, you can
add a postcommit hook (see
http://docs.basho.com/riak/latest/references/appendices/concepts/Commit-Hooks/).
In the past, developers have added hooks that push updates into a
RabbitMQ broker or ZeroMQ channel.
On Wed, Apr 3, 2013 at 7:59 PM, Brisa Jiménez
<brisa.jimene...@gmail.com> wrote:
Hi,
I want to simulate a transaction.
I want to know when a riak operation happens.
I know that riak isn't a relational database, but it is important
for me in
particular cases to undo operations when something goes wrong.
Any have any suggestion for me about I want to do?
Thank you very much.
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