Sorry, I wasn’t completely correct. Persistence and CacheStore can work together, but if cache configured with write-through or read-through modes enabled then data consistency between Ignite persistence and CacheStore is not guaranteed at all times, so such configurations are usually avoided. However, from what you’re saying it seems that you don’t need write-through or read-through, so it should work fine. Your solution seems OK. If you only need a one-time setup I guess you could also do it without a CacheStore and just get the data from Oracle and put it into Ignite via putAll or DataStreamer.
Thanks, Stan From: Prasad Bhalerao Sent: 21 февраля 2018 г. 14:33 To: user@ignite.apache.org Subject: Re: Using 3rd party DB together with native persistence (WAS: GettingInvalid state exception when Persistance is enabled.) Hi Stan, Thank you for the reply. I will send different questions separately now onwards. I do not understand what are you trying to say ( "Ignite doesn’t support using 3rd party DBs and native persistence with the same cache" ) . If the persistence is enabled and if you create or load the cache from 3rd party DB or any other source, data is always stored/backed in ignite native persistence store. I have enable the persistence using IgniteConfiguration. I believe that this configuration is global and so it is applicable to all the caches I have created. As per my understanding, if persistence is enabled any cache created will be stored/backed in ignite persistence store. So now if I load the data in cache from oracle or any other DB table, it will be persisted in ignite native persistence file system. The point is I want to load the cache from oracle tables only first time or when the cache is empty. To load the cache from 3rd party DB I am using cache.loadCache method. I am checking cache size, if the size is zero I call loadCache method. If the cache is not empty it means that data is already loaded in previous attempt so no need to call loadCache method. I just wanted to know if there is any better solution to achieve this. Thanks, Prasad On Wed, Feb 21, 2018 at 1:33 PM, Stanislav Lukyanov <stanlukya...@gmail.com> wrote: Hi Prasad, // Please send different questions separately – this way it’s easier to answer and to search for existing answers > Also, I am loading the cache from oracle table using loadCache method. If the > persistence is enabled and if the data is already persisted, I want to make > sure that the cache is loaded from persisted data instead of loading it from > oracle table using loadCache. Can someone please advise how this can be > achieved? Ignite doesn’t support using 3rd party DBs and native persistence with the same cache. If you need to use both, I’d suggest to create two caches, one backed by Oracle and one with enabled Ignite persistence, and alternate between them in your application code. Thanks, Stan From: Prasad Bhalerao Sent: 20 февраля 2018 г. 15:24 To: user@ignite.apache.org Subject: Getting Invalid state exception when Persistance is enabled. Hi, I am starting ignite node in server mode in intellij. I am starting only one instance of it. I am using IgniteSpringBean to set configuration and start the node as shown below. But when I enable persistence, I get following exception. Caused by: java.lang.IllegalStateException: Ignite is in invalid state to perform this operation. It either not started yet or has already being or have stopped [ignite=null, cfg=null] As per the doc, IgniteSpringBean is responsible for starting the ignite. So how to set node to active state in case this case? Also, I am loading the cache from oracle table using loadCache method. If the persistence is enabled and if the data is already persisted, I want to make sure that the cache is loaded from persisted data instead of loading it from oracle table using loadCache. Can someone please advise how this can be achieved? Code to config ignite and cache: @Bean public IgniteSpringBean igniteInstance() { IgniteSpringBean ignite = new IgniteSpringBean(); ignite.active(true); ignite.setConfiguration(getIgniteConfiguration()); return ignite; } private IgniteConfiguration getIgniteConfiguration() { String HOST = "127.0.0.1:47500..47509"; TcpDiscoveryVmIpFinder ipFinder = new TcpDiscoveryVmIpFinder(); ipFinder.setAddresses(Collections.singletonList(HOST)); TcpDiscoverySpi discoSpi = new TcpDiscoverySpi(); discoSpi.setIpFinder(ipFinder); IgniteConfiguration cfg = new IgniteConfiguration(); cfg.setDiscoverySpi(discoSpi); cfg.setIgniteInstanceName("springDataNode"); cfg.setPeerClassLoadingEnabled(false); cfg.setRebalanceThreadPoolSize(4); DataStorageConfiguration storageCfg = new DataStorageConfiguration(); storageCfg.getDefaultDataRegionConfiguration().setPersistenceEnabled(true); cfg.setDataStorageConfiguration(storageCfg); CacheConfiguration<IPRangeDataKey, IPV4RangeData> ipv4RangeCacheCfg = new CacheConfiguration<>("IPV4RangeCache"); ipv4RangeCacheCfg.setAtomicityMode(CacheAtomicityMode.TRANSACTIONAL); ipv4RangeCacheCfg.setWriteThrough(false); ipv4RangeCacheCfg.setReadThrough(false); ipv4RangeCacheCfg.setRebalanceMode(CacheRebalanceMode.ASYNC); ipv4RangeCacheCfg.setWriteSynchronizationMode(CacheWriteSynchronizationMode.FULL_SYNC); ipv4RangeCacheCfg.setBackups(1); Factory<IPV4RangeCacheDataLoader> storeFactory = FactoryBuilder.factoryOf(IPV4RangeCacheDataLoader.class); ipv4RangeCacheCfg.setCacheStoreFactory(storeFactory); cfg.setCacheConfiguration(ipv4RangeCacheCfg); return cfg; } Thanks, Prasad