public async Task Conflict()
{
var client = new Client(Cluster(5));
var aborted = false;
using (var t1 = client.BeginWriteTransaction())
{
using (var t2 = client.BeginWriteTransaction())
{
await t1.Write("foo", "bar");
await t2.Write("foo", await t2.Read("foo") + "baz");
await t1.Commit();
try
{
await t2.Commit();
}
catch (Exception)
{
aborted = true;
}
}
}
using (var t = client.BeginReadTransaction())
{
Assert.IsTrue(aborted);
Assert.AreEqual("bar", await t.Read("foo"));
}
}
public async Task NonConflict()
{
var client = new Client(Cluster(5));
using (var t = client.BeginWriteTransaction())
{
await t.Write("foo", "bing");
await t.Write("bar", "bing");
await t.Commit();
}
using (var t = client.BeginReadTransaction())
{
Assert.AreEqual("bing", await t.Read("foo"));
using (var w = client.BeginWriteTransaction())
{
await w.Write("foo", "baz");
await w.Write("bar", "baz");
await w.Commit();
await Task.Delay(500);//allow for propogation
}
//note that read remains consistent despite interleaving write
Assert.AreEqual("bing", await t.Read("bar"));
}
}
public async Task<long> Race(Func<string, Task<string>> Cluster, string Shared, string Private)
{
var client = new Client(Cluster);
while (true)
{
using (var t = client.BeginWriteTransaction())
{
var s = int.Parse(await t.Read(Shared));
if (s >= 20) return int.Parse(await t.Read(Private));
var p = int.Parse(await t.Read(Private));
await t.Write(Shared, (s + 1).ToString());
await t.Write(Private, (p + 1).ToString());
try
{
await t.Commit();
}
catch
{
}
}
}
}
public async Task RacePerf()
{
var start = DateTime.UtcNow;
Console.WriteLine(DateTime.UtcNow.ToString("yyyy'-'MM'-'dd'T'HH':'mm':'ssK"));
var cluster = Cluster(5);
var client = new Client(cluster);
await client.Write("shared", "0");
await client.Write("p1", "0");
await client.Write("p2", "0");
var r1 = Race(cluster, "shared", "p1");
var r2 = Race(cluster, "shared", "p2");
var res1 = await r1;
var res2 = await r2;
var end = DateTime.UtcNow;
Console.WriteLine(DateTime.UtcNow.ToString("yyyy'-'MM'-'dd'T'HH':'mm':'ssK"));
var opspersec = 20 / (end.Subtract(start)).TotalSeconds;
Console.WriteLine(opspersec);
Console.WriteLine(res1 + "/" + res2);
}
public Task ReadN(Func<string, Task<string>> Cluster, int Ops)
{
var client = new Client(Cluster);
return Task.Run(async () =>
{
for (int i = 0; i < Ops; i++)
{
using (var t1 = client.BeginWriteTransaction())
{
var r1 = t1.Read("foo");
var r2 = t1.Read("bing");
var r3 = t1.Read("a");
var r4 = t1.Read("b");
Assert.AreEqual("bar", await r1);
Assert.AreEqual("bong", await r2);
Assert.AreEqual("z", await r3);
Assert.AreEqual("x", await r4);
await t1.Commit();
}
}
});
}
public async Task ReadPerf()
{
var ops = 1000;
var cluster = Cluster(5);
var client = new Client(cluster);
using (var t1 = client.BeginWriteTransaction())
{
await t1.Write("foo", "bar");
await t1.Write("bing", "bong");
await t1.Write("a", "z");
await t1.Write("b", "x");
await t1.Commit();
}
var start = DateTime.UtcNow;
Console.WriteLine(DateTime.UtcNow.ToString("yyyy'-'MM'-'dd'T'HH':'mm':'ssK"));
var clients = new List<Task>();
for (int i = 0; i < 10; i++)
{
clients.Add(ReadN(cluster, 100));
}
foreach (var cl in clients)
{
await cl;
}
var end = DateTime.UtcNow;
Console.WriteLine(DateTime.UtcNow.ToString("yyyy'-'MM'-'dd'T'HH':'mm':'ssK"));
var opspersec = ops / (end.Subtract(start)).TotalSeconds;
Console.WriteLine(opspersec);
}
public async Task WitePerf()
{
var ops = 100;
var client = new Client(Cluster(5));
using (var t1 = client.BeginWriteTransaction())
{
await t1.Write("foo", "bar");
await t1.Write("bing", "bong");
await t1.Commit();
}
var start = DateTime.UtcNow;
Console.WriteLine(DateTime.UtcNow.ToString("yyyy'-'MM'-'dd'T'HH':'mm':'ssK"));
for (int i = 0; i < ops; i++)
{
using (var t1 = client.BeginWriteTransaction())
{
var r1 = t1.Read("foo");
var r2 = t1.Read("bing");
var foo = await r1;
var bing = await r2;
await t1.Write("foo", bing);
await t1.Write("bing", foo);
await t1.Commit();
}
}
var end = DateTime.UtcNow;
Console.WriteLine(DateTime.UtcNow.ToString("yyyy'-'MM'-'dd'T'HH':'mm':'ssK"));
var opspersec = ops / (end.Subtract(start)).TotalSeconds;
Console.WriteLine(opspersec);
}
