public NodeBalanceData(ArrayList hashMap, Hashtable bucketStatistics, ArrayList members)
{
_percentWeightPerNode = 100 / members.Count;
_members = members;
int memberCount = _members.Count;
_hashMapData = new ArrayList(memberCount);
_cacheDataSum = 1;
ArrayList _weightIdList = new ArrayList();
for (int i = 0; i < DistributionManager.TotalBuckets; i++)
{
HashMapBucket hmapBuck = (HashMapBucket)hashMap[i];
BucketStatistics buckStats = (BucketStatistics)bucketStatistics[i];
if (hmapBuck.Status != BucketStatus.UnderStateTxfr) //include only those buckets that are Functional
{
WeightIdPair listItem = new WeightIdPair(hmapBuck.BucketId, buckStats.DataSize, hmapBuck.PermanentAddress);
_weightIdList.Add(listItem);
}
_cacheDataSum += buckStats.DataSize; //Lets get the TOTAL weight of the cluster.
}
_weightPerNode = _cacheDataSum / memberCount;
_balanceDataListForNodes = new ArrayList(memberCount);
foreach (Address mbr in _members)
{
BalanceDataForNode balanceData = new BalanceDataForNode(_weightIdList, mbr, _cacheDataSum);
_balanceDataListForNodes.Add(balanceData);
}
}
public NodeBalanceData(ArrayList hashMap, Hashtable bucketStatistics, ArrayList members)
{
_percentWeightPerNode = 100/members.Count;
_members = members;
int memberCount = _members.Count;
_hashMapData = new ArrayList(memberCount);
_cacheDataSum = 1;
ArrayList _weightIdList = new ArrayList();
for (int i = 0; i < DistributionManager.TotalBuckets; i++)
{
HashMapBucket hmapBuck = (HashMapBucket)hashMap[i];
BucketStatistics buckStats = (BucketStatistics)bucketStatistics[i];
if (hmapBuck.Status != BucketStatus.UnderStateTxfr) //include only those buckets that are Functional
{
WeightIdPair listItem = new WeightIdPair(hmapBuck.BucketId, buckStats.DataSize, hmapBuck.PermanentAddress);
_weightIdList.Add(listItem);
}
_cacheDataSum += buckStats.DataSize; //Lets get the TOTAL weight of the cluster.
}
_weightPerNode = _cacheDataSum / memberCount;
_balanceDataListForNodes = new ArrayList(memberCount);
foreach (Address mbr in _members)
{
BalanceDataForNode balanceData = new BalanceDataForNode(_weightIdList, mbr,_cacheDataSum);
_balanceDataListForNodes.Add(balanceData);
}
}
public DistributionData(ArrayList hashMap, Hashtable bucketStatistics, ArrayList members, ILogger NCacheLog, long cacheSizePerNode)
{
_members = members;
int memberCount = _members.Count;
_hashMapData = new ArrayList(memberCount);
_cacheDataSum = 1;
ArrayList _weightIdList = new ArrayList();
for (int i = 0; i < DistributionManager.TotalBuckets; i++)
{
HashMapBucket hmapBuck = (HashMapBucket)hashMap[i];
BucketStatistics buckStats = (BucketStatistics)bucketStatistics[i];
if (buckStats == null)
{
buckStats = new BucketStatistics();
}
//Catering for situations when two nodes are balancing and a new node joins in OR
// two nodes joins one after the other, first one started state transfer while second jumped in.
if (hmapBuck.Status != BucketStatus.UnderStateTxfr) //include only those buckets that are Functional/NeedStateTr
{
//We are selecting buckets based on temp address; although it is possible that these buckets
//might have not been transfered to TEMP owner but algorithm consider these are owned by TEMP owner.
WeightIdPair listItem = new WeightIdPair(hmapBuck.BucketId, buckStats.DataSize, hmapBuck.TempAddress);
_weightIdList.Add(listItem);
}
_cacheDataSum += buckStats.DataSize; //Lets get the TOTAL weight of the cluster.
}
if (NCacheLog.IsInfoEnabled)
{
NCacheLog.Info("DistributionData()", "cacheDataSum = " + _cacheDataSum.ToString());
}
//Initialize the two very important data pieces. All distribution is based on this.
_bucketsPerNode = DistributionManager.TotalBuckets / (memberCount + 1);
_weightPerNode = _cacheDataSum / (memberCount + 1);
_distMatrixForNodes = new ArrayList(memberCount);
long maxCacheSize = cacheSizePerNode * memberCount; //in bytes..CacheSize/node is the one user has entered while creating the cluster
foreach (Address mbr in _members)
{
DistributionMatrix distMatrix = new DistributionMatrix(_weightIdList, mbr, this, NCacheLog);
distMatrix.MaxCacheSize = maxCacheSize;
_distMatrixForNodes.Add(distMatrix);
}
}
private void InitializeMatrix(int rows, int cols)
{
_mDimensions = new MatrixDimensions(rows, cols);
_weightMatrix = new long[rows, cols];
_idMatrix = new int[rows, cols];
_weightPercentMatrix = new long[rows, 2];
int nLoopCount = 0;
for (int i = 0; i < rows; i++)
{
long rowSum = 0;
for (int j = 0; j < cols; j++)
{
if (nLoopCount < _filteredWeightIdList.Count)
{
WeightIdPair tmpPair = (WeightIdPair)_filteredWeightIdList[nLoopCount];
_weightMatrix[i, j] = tmpPair.Weight;
_idMatrix[i, j] = tmpPair.BucketId;
rowSum += tmpPair.Weight;
}
else
{
_weightMatrix[i, j] = -1;
_idMatrix[i, j] = -1;
}
nLoopCount++;
}
_weightPercentMatrix[i, 1] = rowSum; //populate weightPercent Matrix while populating the weight and Id matrices.
_totalWeight += rowSum;
}
//Here I am calculating sum along with %age weight each row is keeping in. This would help while finding the right
// set of buckets to be given off.
for (int i = 0; i < _mDimensions.Rows; i++)
{
_weightPercentMatrix[i, 0] = Convert.ToInt64(Math.Ceiling(((double)_weightPercentMatrix[i, 1] / (double)_totalWeight) * 100));
}
//Calculate how much %age weight THIS NODE is keeping w.r.t overall cluster.
_percentWeightOfCluster = Convert.ToInt32(((_totalWeight * 100) / _distData.CacheDataSum));
// Although buckets are sacrificed equally, but data is not.
// Every node would share w.r.t the percentage that it is keeping in the Cluster.
// If a node is keeping 50% share of the data, it would give away 50% of the required weight for the coming node.
_weightToSacrifice = Convert.ToInt64(Math.Ceiling(((double)_distData.WeightPerNode * (double)_percentWeightOfCluster) / 100));
_percentWeightToSacrifice = Convert.ToInt32(Math.Ceiling(((double)_weightToSacrifice / (double)_totalWeight) * 100));
}
public DistributionData(ArrayList hashMap, Hashtable bucketStatistics, ArrayList members, ILogger NCacheLog, long cacheSizePerNode)
{
_members = members;
int memberCount = _members.Count;
_hashMapData = new ArrayList(memberCount);
_cacheDataSum = 1;
ArrayList _weightIdList = new ArrayList();
for (int i = 0; i < DistributionManager.TotalBuckets; i++)
{
HashMapBucket hmapBuck = (HashMapBucket)hashMap[i];
BucketStatistics buckStats = (BucketStatistics)bucketStatistics[i];
//Catering for situations when two nodes are balancing and a new node joins in OR
// two nodes joins one after the other, first one started state transfer while second jumped in.
if (hmapBuck.Status != BucketStatus.UnderStateTxfr) //include only those buckets that are Functional/NeedStateTr
{
//We are selecting buckets based on temp address; although it is possible that these buckets
//might have not been transfered to TEMP owner but algorithm consider these are owned by TEMP owner.
WeightIdPair listItem = new WeightIdPair(hmapBuck.BucketId, buckStats.DataSize, hmapBuck.TempAddress);
_weightIdList.Add(listItem);
}
_cacheDataSum += buckStats.DataSize; //Lets get the TOTAL weight of the cluster.
}
if (NCacheLog.IsInfoEnabled) NCacheLog.Info("DistributionData()", "cacheDataSum = " + _cacheDataSum.ToString());
//Initialize the two very important data pieces. All distribution is based on this.
_bucketsPerNode = DistributionManager.TotalBuckets / (memberCount + 1);
_weightPerNode = _cacheDataSum / (memberCount + 1);
//
_distMatrixForNodes = new ArrayList(memberCount);
long maxCacheSize = cacheSizePerNode * memberCount; //in bytes..CacheSize/node is the one user has entered while creating the cluster
foreach (Address mbr in _members)
{
DistributionMatrix distMatrix = new DistributionMatrix(_weightIdList, mbr,this,NCacheLog);
distMatrix.MaxCacheSize = maxCacheSize;
_distMatrixForNodes.Add(distMatrix);
}
}
//data to be moved from Primary node to the secondary node.
//As a result priNode and secNode got updated WeightIdPairLists.
private static void BalanceTwoNodes(BalanceDataForNode priNode, BalanceDataForNode secNode, long dataToMove)
{
int priBucketCount = priNode.ItemsCount;
int secBucketCount = secNode.ItemsCount;
ArrayList priWIPairList = priNode.WeightIdList;
ArrayList secWIPairList = secNode.WeightIdList;
int cushionFactor = 10; // 10% cushion for balancing... +- 10%
long swapWeightGain = 0; // weight gain for this swap
long cushionWeight = Convert.ToInt64(((double)(dataToMove * cushionFactor) / (double)100));
bool bTargetAchieved = false; //loop-invariant, in case we need to exit the loop in middle.
long movedSoFar = 0;
ArrayList usedIndex = new ArrayList(); //this list would keep all those indicies related to Inner loop that are consumed/used in swap.
//Making pivot node to be the secondary one, the one that needs to gain weight.
//swapping or try to swap each element of secNode to all elements of priNode.
//primary is traversed in Descending order, and secondary is traversed in ascending order.
for (int i = 0; i < secBucketCount && !bTargetAchieved; i++)
{
WeightIdPair secWIPair = (WeightIdPair)secWIPairList[i];
for (int j = priBucketCount - 1; j >= 0; j--)
{
WeightIdPair priWIPair = (WeightIdPair)priWIPairList[j];
//only move when there is a gain.
if (priWIPair.Weight > secWIPair.Weight && !usedIndex.Contains(j))
{
swapWeightGain = priWIPair.Weight - secWIPair.Weight;
movedSoFar += swapWeightGain;
if (movedSoFar <= dataToMove)
{
if (dataToMove - movedSoFar <= cushionWeight)
{
//swap the buckets and exit
secWIPairList[i] = priWIPair;
priWIPairList[j] = secWIPair;
bTargetAchieved = true;
break;
}
else
{
secWIPairList[i] = priWIPair;
priWIPairList[j] = secWIPair;
usedIndex.Add(j);
break; //i need to move fwd now
}
} //end if
else
{
if (movedSoFar - dataToMove <= cushionWeight)
{
//swap the buckets an exit
secWIPairList[i] = priWIPair;
priWIPairList[j] = secWIPair;
bTargetAchieved = true;
break;
}
else
{
movedSoFar -= swapWeightGain;
}
} //end else
} //end if for priWeight > seWeight
} //end inner for loop
} //end outer for loop
//re-assign the WeightIdPairList to respective BalanceDataForNode
priNode.WeightIdList = priWIPairList;
priNode.WeightIdList.Sort();
secNode.WeightIdList = secWIPairList;
secNode.WeightIdList.Sort();
}
public int CompareTo(object obj)
{
WeightIdPair wiPair = (WeightIdPair)obj;
return(this._weight.CompareTo(wiPair.Weight));
}