Hi, 1. Ignite doesn't cate about whether persistence operations are local or not. It fully relies on CacheStore implementation. 2. CacheStore classes should be in classpath on all nodes including client nodes. These classes are not delivered automatically. 3. Writing to store always happened on primary node for atomic caches, and on transaction initiator node (it can be a client node) for transactional caches. 4. BEFORE_NODE_STOP occurs right before node stop process begin. You can try to use EVT_CACHE_STOPPED event for closing connections to db, which occurs when cache has stopped.
On Tue, Jul 11, 2017 at 8:46 PM, limabean <[email protected]> wrote: > Hi, > > I saw this remark on the mailing list from vkulichenko: > >> Generally CacheStore is designed to be a single store shared between all > >> nodes. > > I want to develop my own CacheStore implementation to a data store. > The data store will have a "contact point" or client running on each Ignite > node (think a Cassandra node per Ignite node as an example). I’d like each > Ignite node to “think” that its cache persistence operations are local. > > If each ignite node instantiates a copy of my custom CacheStore class on > each node, and each CacheStore instance is configured to talk locally, then > it seems what I describe is possible, but I have many questions. > > Assuming the above is possible: > Each Ignite Node will need the CacheStore classes in its class path. How > do > my custom CacheStore classes get to each node? How and when are the custom > CacheStore classes distributed to Ignite nodes? (best practice?) > > It does not seem like the cache type (local, replicated or partitioned) > would impact each node writing locally. > For partitioned caches, that would go through the primary, and for the > other > cache types...they are always "primary" ? > > None of the examples (in the Ignite code base or documentation) show how to > disconnect an Ignite node from a persistent store in the CacheStore > examples > that I have found. How does this work ? (Not sure how to close the > connection to a database when a CacheStore connection is closed or when an > Ignite BEFORE_NODE_STOP lifecycle event occurs?) > > Thank you, > > > > > -- > View this message in context: http://apache-ignite-users. > 70518.x6.nabble.com/How-does-CacheStore-persistence- > actually-work-tp14641.html > Sent from the Apache Ignite Users mailing list archive at Nabble.com. > -- Best regards, Andrey V. Mashenkov
