//purpose - repartition data in nodes based on hash function h = id mod n
public void HashPartition <T>(IRecordRepository <T> repository)
{
List <T> recordList = new List <T>();
//retrieve all records from databases and add recordList.
foreach (string database_id in DatabaseConnectionIDs)
{
recordList.AddRange(repository.GetRecords <T>(database_id));
repository.ClearTable <T>(database_id);
}
//number of nodes/databases
int n = DatabaseConnectionIDs.Length;
//go through each tool and add to appropirate partition/database/node
foreach (T record in recordList)
{
int PartitionKey = GetPartitionKey <T>(record);
repository.SaveRecord <T>(record, this.DatabaseConnectionIDs[PartitionKey % n]);
}
}
private void RemoveSampleRecords(String database_id)
{
repository.ClearTable <Tool>(database_id);
repository2.ClearTable <LineItem>(database_id);
}
