public void Init()
{
for (var i = 0; i < ServerCount; i++)
{
if (Directory.Exists($"server{i:D2}"))
{
Directory.Delete($"server{i:D2}", true);
}
}
StartServers();
TransactionStatistics.Reset();
}
private static void PerfTest(Connector connector)
{
TransactionStatistics.Reset();
// first delete all data to start with a clean database
connector.AdminInterface().DropDatabase();
connector.DeclareCollection <Account>();
connector.DeclareCollection <MoneyTransfer>();
var accounts = connector.DataSource <Account>();
// create the accounts
for (int i = 0; i < TestIterations; i++)
{
accounts.Put(new Account {
Id = i, Balance = 1000
});
}
var tids = Enumerable.Range(0, TestIterations).ToArray();
try
{
tids = connector.GenerateUniqueIds("transfer_id", TestIterations);
}
catch (Exception)
{
// ignore (means testing with non persistent server)
}
var rand = new Random();
int failed = 0;
var sw = new Stopwatch();
sw.Start();
for (int i = 0; i < TestIterations; i++)
{
var src = rand.Next(1, 1000);
var dst = src + 1 > 999? src - 1:src + 1;
var transferred = rand.Next(1, 1000);
var srcAccount = accounts[src];
var dstAccount = accounts[dst];
srcAccount.Balance -= transferred;
dstAccount.Balance += transferred;
var transaction = connector.BeginTransaction();
transaction.UpdateIf(srcAccount, account => account.Balance >= transferred);
transaction.Put(dstAccount);
transaction.Put(new MoneyTransfer
{
Amount = transferred,
Date = DateTime.Today,
SourceAccount = src,
DestinationAccount = dst,
Id = tids[i]
});
try
{
transaction.Commit();
}
catch (CacheException e)
{
if (e.IsTransactionException)
{
failed++;
}
}
}
sw.Stop();
Console.WriteLine($"{TestIterations} transactions took {sw.ElapsedMilliseconds} milliseconds. Rolled back transactions: {failed}. ");
var stats = TransactionStatistics.AsString();
Console.WriteLine(stats);
// check that all accounts have positive balance
var negatives = accounts.Count(acc => acc.Balance < 0);
if (negatives > 0)
{
Console.WriteLine("Some accounts have negative balance");
}
else
{
Console.WriteLine("All accounts have positive balance");
}
}