Anghel Botos created IGNITE-4164:
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Summary: Add support for parallel loading of caches using custom
SQL load queries in
org.apache.ignite.cache.store.jdbc.CacheAbstractJdbcStore#loadCache
Key: IGNITE-4164
URL: https://issues.apache.org/jira/browse/IGNITE-4164
Project: Ignite
Issue Type: Improvement
Components: SQL
Affects Versions: 1.7
Reporter: Anghel Botos
Please add support for parallel loading of caches using custom SQL load queries
in org.apache.ignite.cache.store.jdbc.CacheAbstractJdbcStore#loadCache. For the
moment this is not possible, as the current implementation performs the load
for each entity type in the cache using a single
{{LoadCacheCustomQueryWorker}}, as opposed to the the approach that is used
when no custom SQL queries are provided for the load, where for each entity
type, the load is distributed across several threads based on some ranges.
While it may not be possible to support parralel load with any custom SQL query
(as this would mean that Ignite would have to somehow understand the meaning of
that custom query), it would still be a significant improvement if it would be
possible to have the parallel load when providing a custom {{WHERE}} clause for
each entity type (instead of a full custom query).
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