如何为Apache Ignite缓存配置持久性存储？

Question

I'm trying to configure persistent storage for Apache Ignite, so that my IgniteCache instance won't lose data on app restart. My setup is a local one-node cluster started from my code like this:

IgniteConfiguration cfg = new IgniteConfiguration();
cfg.setWorkDirectory("C:\\ignite");

// Ignite persistence configuration.
DataStorageConfiguration storageCfg = new DataStorageConfiguration();
storageCfg.setStoragePath("ignitedb/storage");
storageCfg.setWalPath("ignitedb/wal");
storageCfg.setWalArchivePath("ignitedb/wal/archive");

// Enabling the persistence.

storageCfg.getDefaultDataRegionConfiguration().setPersistenceEnabled(true);

// Applying settings.
cfg.setDataStorageConfiguration(storageCfg);

Ignite ignite = Ignition.getOrStart(cfg);
ignite.active(true);
// Get all server nodes that are already up and running.
Collection<ClusterNode> nodes = ignite.cluster().forServers().nodes();
// Set the baseline topology that is represented by these nodes.
ignite.cluster().setBaselineTopology(nodes);
return ignite;

The cache is created like this:

cacheConfiguration = new CacheConfiguration<>();
cacheConfiguration.setBackups(1);
cacheConfiguration.setAtomicityMode(CacheAtomicityMode.ATOMIC);
cacheConfiguration.setName("UserCache");
cacheConfiguration.setCacheMode(CacheMode.LOCAL);
cacheConfiguration.setReadFromBackup(true);
cacheConfiguration.setWriteSynchronizationMode(CacheWriteSynchronizationMode.FULL_SYNC);
cacheConfiguration.setIndexedTypes(String.class, User.class);
IgniteCache<String, User> cache = ignite.getOrCreateCache(cacheConfiguration);

Storing User objects in the cache works. Ignite creates a directory structure under C:\\ignite . But on app restart, all data is lost. How can I configure this properly?

Answer 1

It seems that the root cause is LOCAL cache mode. Try to use REPLICATED or PARTITIONED : https://apacheignite.readme.io/docs/cache-modes