Vyacheslav Koptilin created IGNITE-28066:
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Summary: Caching a topology snapshot in a heap
Key: IGNITE-28066
URL: https://issues.apache.org/jira/browse/IGNITE-28066
Project: Ignite
Issue Type: Improvement
Reporter: Vyacheslav Koptilin
Currently, `LogicalTopologyImpl` always reads a topology snapshot from the
storage:
{code:java|title=LogicalTopologyImpl}
@Override
public LogicalTopologySnapshot getLogicalTopology() {
return readLogicalTopology();
}
private LogicalTopologySnapshot readLogicalTopology() {
byte[] bytes = storage.get(LOGICAL_TOPOLOGY_KEY);
return bytes == null ? LogicalTopologySnapshot.INITIAL
: VersionedSerialization.fromBytes(bytes,
LogicalTopologySnapshotSerializer.INSTANCE);
}
{code}
Reading from disk and then deserializing the object can be slow. So, it makes
sense to cache this value in a heap and read only once during class
initialization.
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