Thank Jeff 🙂 but if you save several data to fast with cassandra repository and if cassandra doesn't have the same speed and inserts more slowly. What is the bevahior ? cassandra store the overflow in a additionnal buffer ? No data can be lost on the cassandra's side ?
Thank a lot. Adrian ________________________________ De : Jeff Jirsa <jji...@gmail.com> Envoyé : samedi 19 octobre 2019 00:41 À : cassandra <user@cassandra.apache.org> Objet : Re: loosing data during saving data from java There is no buffer in cassandra that is known to (or suspected to) lose acknowledged writes if it's overwhelmed. There may be a client bug where you send so many async writes that they overwhelm a bounded queue, or otherwise get dropped or timeout, but those would be client bugs, and I'm not sure this list can help you with them. On Fri, Oct 18, 2019 at 3:16 PM adrien ruffie <adriennolar...@hotmail.fr<mailto:adriennolar...@hotmail.fr>> wrote: Hello all, I have a table cassandra where I insert quickly several java entity about 15.000 entries by minutes. But at the process ending, I only have for exemple 199.921 entries instead 312.212 If I truncate the table and relaunch the process, several time I get 199.354 or 189.012 entries ... not a really fixed entries saved any time ... several coworker tell me, they heard about a buffer which can be overwhelmed sometimes, and loosing several entities stacked for insertion ... right ? Because I don't understand why this loosing insertion appears ... And I java code is very simple like below: myEntitiesList.forEach(myEntity -> { try { myEntitiesRepository.save(myEntity).subscribe(); } catch (Exception e) { e.printStackTrace(); } } And the repository is a: public interface MyEntityRepository extends ReactiveCassandraRepository<MyEntity, String> { } Some one already heard about this problem ? Thank you very must and best regards Adrian
