Hi Valentin, As far as I know, when persistence is enabled and Ignite can't allocate new page-memory in the memory segment, then Ignite automatically evict some data from RAM to PDS using Random-2-LRU eviction algorithm. And there are no mechanisms to evict entries out when PDS is enabled.
I'll be glad if I am not right and someone will correct me because, as Ignite user, I can't use PDS only as RAM disk replication for the use case in my project. On Thu, Feb 1, 2018 at 3:53 AM, Valentin Kulichenko <valentin.kuliche...@gmail.com> wrote: > Folks, > > On "Eviction Policies" documentation page  we have the following callout: > >> Configured eviction policy has no effect if Ignite persistence is enabled >> Note that if Ignite Persistence is enabled, then the page-based evictions > have no effect because the oldest pages will be purged from memory > automatically. > > This really confuses me. Why is there a difference in how data is evicted > from memory depending on having disk enabled or not? And how does eviction > work with persistence enabled then? > > Does anyone can clarify? > >  https://apacheignite.readme.io/docs/evictions > > -Val -- Best Regards, Vyacheslav D.