When you have persistence configured in your cluster, some set of nodes form a baseline topology (BLT). Those are the nodes that store the data and persist it on their disks. Nodes outside of the BLT can query the data stored on other nodes that are in the BLT. Normally nodes are not added to the baseline automatically when they join the cluster. It requires manual actions or configuration of baseline auto-adjustment: https://www.gridgain.com/docs/latest/developers-guide/baseline-topology#baseline-topology-autoadjustment
You can add the nodes that you want to store and persist the data to the baseline. Others can work as "compute-only" nodes. If you want to optimize the work of nodes that are outside of the BLT, consider using a near cache: https://www.gridgain.com/docs/latest/developers-guide/near-cache More information about the Baseline Topology feature: https://www.gridgain.com/docs/latest/developers-guide/baseline-topology Denis ср, 2 сент. 2020 г. в 05:45, xingjl6280 <[email protected]>: > Hi team, > > My cluster is running in Replicated cache mode, to ensure no data loss if > any node is down. > > Now I'm going to to enable persistence, but I don't want each node to to > hold a full backup. > Is it possible to make some of nodes persist, while the rest are running in > pure memory mode to read and write same set of data? > > I'm quite confused with Baseline topology. > I saw this in documentation: > > ==================================================================================== > *Moreover, the cluster can have cluster nodes that are not a part of the > baseline topology such as: > Server nodes that either store data in memory or persist it to a 3rd party > database like RDBMS or NoSQL.* > > ==================================================================================== > > > But I also find this statement seems conflict to above > > ==================================================================================== > *The new node cannot hold data of caches/tables who persist data in Ignite > persistence.* > > ==================================================================================== > > please kindly advise. > thank you > > Regards > > > > -- > Sent from: http://apache-ignite-users.70518.x6.nabble.com/ >
