Ivan Daschinskiy created IGNITE-13508:
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Summary: Test scenario of two-phased rebalance (PDS reduce)
Key: IGNITE-13508
URL: https://issues.apache.org/jira/browse/IGNITE-13508
Project: Ignite
Issue Type: Test
Reporter: Ivan Daschinskiy
Let us assume a cluster of 16 affinity nodes.
Lets divide cluster in 4 equal cells:
Each node in cell has the same node attribute {{CELL=CELL_<idx>}}
Caches, that will be started on nodes, should have affinity function with this
backup filter:
{code:java}
public class CellularAffinityBackupFilter implements
IgniteBiPredicate<ClusterNode, List<ClusterNode>> {
private static final long serialVersionUID = 1L;
private final String attrName;
public CellularAffinityBackupFilter(String attrName) {
this.attrName = attrName;
}
@Override public boolean apply(ClusterNode candidate, List<ClusterNode>
previouslySelected) {
for (ClusterNode node : previouslySelected)
return Objects.equals(candidate.attribute(attrName),
node.attribute(attrName));
return true;
}
}
{code}
Steps:
* Preparations.
1. Start all 4 cells.
2. Load data to cache with the mentioned above affinity function and fix PDS
size on all nodes.
3. Delete 80% of data and fix PDS size on all nodes.
* Phase 1
1. Stop two nodes in each cell, total a half of all nodes and clean PDS.
2. Start cleaned node with preservance of consistent id and cell attributes.
3. Wait for rebalance finished.
* Phase 2
Run steps 1-3 of Phase 2 on the other half of the cluster.
* Verifications
1. Check that PDS size reduced (compare to step 3)
2. Check data consistency (idle_verify --dump)
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