public List <NodeDescription> AddSeedNodes(
int seedNodesToAdd,
IEnumerable <NodeDescription> nodes,
IEnumerable <NodeDescription> currentSeedNodes,
int faultDomainCount,
int upgradeDomainCount)
{
this.UpdateNodeInfo(nodes, faultDomainCount, upgradeDomainCount);
if (seedNodesToAdd <= 0 || nodes.Count() < currentSeedNodes.Count() + seedNodesToAdd)
{
return(null);
}
if (nodes.Count() == currentSeedNodes.Count() + seedNodesToAdd)
{
return(SubtractNodes(nodes, currentSeedNodes));
}
var data = this.GetMatrix(nodes);
var existing = this.GetMatrix(currentSeedNodes);
var result = RandomMatrixSearch.Run(data, existing, currentSeedNodes.Count() + seedNodesToAdd, true);
for (int i = 0; i < this.row; i++)
{
for (int j = 0; j < this.col; j++)
{
result[i, j] -= existing[i, j];
}
}
return(this.GetNodesFromMatrix(SubtractNodes(nodes, currentSeedNodes), result));
}
private IEnumerable <NodeDescription> SelectInternal(
int targetSeedNodeCount,
IEnumerable <NodeDescription> nodes,
bool allowSuboptimal)
{
this.traceLogger.WriteInfo(SeedNodeSelector.TraceType, "SeedNodeSelector.SelectInternal: Entering. allowSuboptimal: {0}", allowSuboptimal);
var data = this.GetMatrix(nodes);
if (!allowSuboptimal)
{
var upperLimit = (targetSeedNodeCount + Math.Max(this.row, this.col) - 1) / Math.Max(this.row, this.col);
for (int i = 0; i < this.row; i++)
{
for (int j = 0; j < this.col; j++)
{
if (data[i, j] > upperLimit)
{
data[i, j] = upperLimit;
}
}
}
}
if (nodes.Count() == targetSeedNodeCount)
{
if (!allowSuboptimal && !Validate(data, targetSeedNodeCount, data))
{
this.traceLogger.WriteInfo(SeedNodeSelector.TraceType, "SeedNodeSelector.SelectInternal: return null.");
return(null);
}
this.traceLogger.WriteInfo(SeedNodeSelector.TraceType, "SeedNodeSelector.SelectInternal: return original nodes.");
return(nodes);
}
var result = IterativeMatrixSearch.Run(data, targetSeedNodeCount);
this.traceLogger.WriteInfo(SeedNodeSelector.TraceType, "SeedNodeSelector.SelectInternal: IterativeMatrixSearch.Run returns {0}.", result != null);
if (result == null && allowSuboptimal)
{
result = RandomMatrixSearch.Run(data, null, targetSeedNodeCount, true);
this.traceLogger.WriteInfo(SeedNodeSelector.TraceType, "SeedNodeSelector.SelectInternal: RandomMatrixSearch.Run returns {0}.", result != null);
}
if (result == null)
{
return(null);
}
return(this.GetNodesFromMatrix(nodes, result));
}
public List <NodeDescription> RemoveSeedNodes(
int seedNodesToRemove,
IEnumerable <NodeDescription> currentSeedNodes)
{
this.UpdateNodeInfo(currentSeedNodes, this.row, this.col);
if (seedNodesToRemove <= 0 || currentSeedNodes.Count() <= seedNodesToRemove)
{
return(null);
}
var data = this.GetMatrix(currentSeedNodes);
var result = RandomMatrixSearch.Run(data, null, currentSeedNodes.Count() - seedNodesToRemove, true);
var newSeedNodes = this.GetNodesFromMatrix(currentSeedNodes, result);
return(SubtractNodes(currentSeedNodes, newSeedNodes));
}