Hi Pavel, Thanks for below Info. I need one more clarification regarding data consistency and your views. We have a microservice based architecture where one service will update/insert the cache cluster and notify other service to read data from cache in real time way. So lookup can happen either key based or applying TextQuery search. We have external cache store as backup but that will not help during Text Query Search as all data needs to be in memory. So do you see any issue with data consistency while querying the cache?
We will ensure sufficient memory per data region. Is there anything else which needs to be monitored . If you can share some views . We can add those metrics for monitoring? Regards Satyajit From: Pavel Tupitsyn <[email protected]> Sent: Tuesday, June 27, 2023 8:13 PM To: Mandal, Satyajit: IT (PUN) <[email protected]> Cc: [email protected] Subject: Re: Data consistency in Ignite and BackUp Filter in Ignite .net node CAUTION: This email originated from outside our organisation - [email protected]<mailto:[email protected]> Do not click on links, open attachments, or respond unless you recognize the sender and can validate the content is safe. Hi Satyajit, > ensure backup partitions of a particular node is created in another > node and not in same node No need to do anything, this is the default behavior: backup partitions always reside on a different node. To put it another way: every partition has a primary node and one or more backup nodes. All those nodes are different (given enough nodes in the cluster). - AffinityBackupFilter is for complex use cases when the cluster spreads multiple racks or availability zones [1] [2] - If you have multiple nodes per machine, consider RendezvousAffinityFunction.ExcludeNeighbors property [3] [1] https://ignite.apache.org/releases/latest/dotnetdoc/api/Apache.Ignite.Core.Cache.Affinity.Rendezvous.ClusterNodeAttributeAffinityBackupFilter.html<https://clicktime.symantec.com/15sM1Gy5PdsLM3siGkM23?h=cO_QJLdrtzTxbFFZGD0aLyUUsqezz5X0GCiXSjqzYYg=&u=https://ignite.apache.org/releases/latest/dotnetdoc/api/Apache.Ignite.Core.Cache.Affinity.Rendezvous.ClusterNodeAttributeAffinityBackupFilter.html> [2] https://www.gridgain.com/docs/latest/developers-guide/configuring-caches/managing-data-distribution#backup-filter<https://clicktime.symantec.com/15sM67AMrFYvkzhdpJkAf?h=-Jbv1-ZUpqMUY2xn5IJddtZ2wk_5th5Uy1TKW0AfIqU=&u=https://www.gridgain.com/docs/latest/developers-guide/configuring-caches/managing-data-distribution%23backup-filter> [3] https://ignite.apache.org/releases/latest/dotnetdoc/api/Apache.Ignite.Core.Cache.Affinity.AffinityFunctionBase.html#Apache_Ignite_Core_Cache_Affinity_AffinityFunctionBase_ExcludeNeighbors<https://clicktime.symantec.com/15sLvSmnw2Bjw73njBwsR?h=AdE7UMHeKx0TYXHG0iydrlc2PuNzZ7b4z1rZN_ZVUjw=&u=https://ignite.apache.org/releases/latest/dotnetdoc/api/Apache.Ignite.Core.Cache.Affinity.AffinityFunctionBase.html%23Apache_Ignite_Core_Cache_Affinity_AffinityFunctionBase_ExcludeNeighbors> On Tue, Jun 27, 2023 at 4:02 PM <[email protected]<mailto:[email protected]>> wrote: Hi Pavel, We are running 6 node cluster with Active Active setup. 3 nodes in one Datacenter and 3 in another datacenter with external cache store enabled for some caches and native persistence enabled for others. Now if we want to setup backup = 1 for in memory caches how that should be done to ensure backup partitions of a particular node is created in another node and not in same node. Also is there any specific settings to ensure data consistency for in memory caches. Can you also share how this settings can be achieved in Ignite(.NET) ( AffinityBackupFilter in RendezvousAffinityFunction) Regards Satyajit Barclays Execution Services Limited registered in England. Registered No. 1767980. Registered office: 1 Churchill Place, London, E14 5HP Barclays Execution Services Limited provides support and administrative services across Barclays group. Barclays Execution Services Limited is an appointed representative of Barclays Bank UK plc, Barclays Bank plc and Clydesdale Financial Services Limited. Barclays Bank UK plc and Barclays Bank plc are authorised by the Prudential Regulation Authority and regulated by the Financial Conduct Authority and the Prudential Regulation Authority. 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