Re: Determining if data will be created on Cassandra Write Exceptions

2017-02-16 Thread Nicolas Guyomar
Hi, If my understanding is correct, as long as you know that at least one node acknowledge a write, it will be replicated at some point in the cluster. A retry failure depends on what you consider a failure :) If you absolutely need LOCAL_QUORUM to succeed, and for any reason Cassandra can't at t

Re: Determining if data will be created on Cassandra Write Exceptions

2017-02-16 Thread rouble
Thanks for the links. I get that all queries need to be idempotent, and we should use retries for data consistency. But, what happens when the retries fail? Then, the data *may* be there. To maintain consistency we need to rollback any created data, correct? tia, rouble On Wed, Feb 15, 2017 at 4

Re: Determining if data will be created on Cassandra Write Exceptions

2017-02-15 Thread Nicolas Guyomar
mine if data is >> actually created when a Write exception is thrown: http://stackoverflow.c >> om/questions/42231140/determining-if-data-will-be-created-on >> -cassandra-write-exceptions >> >> From my discussion on the question, it seems that on *any* Cassandra >>

Re: Determining if data will be created on Cassandra Write Exceptions

2017-02-14 Thread Edward Capriolo
On Tue, Feb 14, 2017 at 2:30 PM, rouble wrote: > Cassandra Gurus, > > I have a question open on stackoverlow on how to determine if data is > actually created when a Write exception is thrown: http://stackoverflow.c > om/questions/42231140/determining-if-data-will-be-created-

Determining if data will be created on Cassandra Write Exceptions

2017-02-14 Thread rouble
Cassandra Gurus, I have a question open on stackoverlow on how to determine if data is actually created when a Write exception is thrown: http://stackoverflow. com/questions/42231140/determining-if-data-will-be- created-on-cassandra-write-exceptions >From my discussion on the question, it se