Folks, Since 2.0 we have introduced PartitionLossPolicy which blocks access to cache if data loss occurred. This is an awesome feature, however it is not very clear how to use it properly.
First of all, there is no documentation. Ticket already exists though and hopefully it will be completed soon: https://issues.apache.org/jira/browse/IGNITE-6994 Second of all, looks like there is no required tooling. Visor and Web Console should be able to show the status (i.e. which partitions are available and which are not), fire alerts in case of partition loss, provide an ability to restore partitions via Ignite#resetLostPartitions method, etc. And finally (most importantly), I'm a bit confused by Ignite#resetLostPartitions method itself. What are the best practices for using it? How a user should decide that partitions are actually restored and how should he choose when to call this method? For example, if we have persistence enabled, is it enough to just bring back the nodes or something else is needed? Actually, why don't we detect this automatically in this scenario? I would appreciate any inputs and thoughts on this topic. -val
