public void ShouldCreateNewRecordIfConcurrentWriterReturnsFalse()
{
var copyOnWrite = new FunctionsCopyOnWrite();
// FunctionsCopyOnWrite
var log = default(IDevice);
try
{
log = Devices.CreateLogDevice(TestContext.CurrentContext.TestDirectory + "\\hlog1.log", deleteOnClose: true);
using (var fht = new FasterKV <KeyStruct, ValueStruct, InputStruct, OutputStruct, Empty, FunctionsCopyOnWrite>
(128, copyOnWrite, new LogSettings {
LogDevice = log, MemorySizeBits = 29
}))
{
fht.StartSession();
var key = default(KeyStruct);
var value = default(ValueStruct);
key = new KeyStruct()
{
kfield1 = 1, kfield2 = 2
};
value = new ValueStruct()
{
vfield1 = 1000, vfield2 = 2000
};
fht.Upsert(ref key, ref value, Empty.Default, 0);
value = new ValueStruct()
{
vfield1 = 1001, vfield2 = 2002
};
fht.Upsert(ref key, ref value, Empty.Default, 0);
var recordCount = 0;
using (var iterator = fht.Log.Scan(fht.Log.BeginAddress, fht.Log.TailAddress))
{
while (iterator.GetNext(out var info))
{
recordCount++;
}
}
Assert.AreEqual(1, copyOnWrite.ConcurrentWriterCallCount, 2);
Assert.AreEqual(2, recordCount);
fht.StopSession();
}
}
finally
{
if (log != null)
{
log.Close();
}
}
}
public void ShouldCreateNewRecordIfConcurrentWriterReturnsFalse()
{
var copyOnWrite = new FunctionsCopyOnWrite();
// FunctionsCopyOnWrite
var log = default(IDevice);
try
{
log = Devices.CreateLogDevice(TestUtils.MethodTestDir + "/hlog1.log", deleteOnClose: true);
using var fht = new FasterKV <KeyStruct, ValueStruct>
(128, new LogSettings { LogDevice = log, MemorySizeBits = 29 });
using var session = fht.NewSession(copyOnWrite);
var key = default(KeyStruct);
var value = default(ValueStruct);
var input = default(InputStruct);
var output = default(OutputStruct);
key = new KeyStruct()
{
kfield1 = 1, kfield2 = 2
};
value = new ValueStruct()
{
vfield1 = 1000, vfield2 = 2000
};
var status = session.Upsert(ref key, ref input, ref value, ref output, out RecordMetadata recordMetadata1);
Assert.IsTrue(!status.Found && status.Record.Created, status.ToString());
// ConcurrentWriter returns false, so we create a new record (and leave the old one sealed).
value = new ValueStruct()
{
vfield1 = 1001, vfield2 = 2002
};
status = session.Upsert(ref key, ref input, ref value, ref output, out RecordMetadata recordMetadata2);
Assert.IsTrue(!status.Found && status.Record.Created, status.ToString());
Assert.Greater(recordMetadata2.Address, recordMetadata1.Address);
var recordCount = 0;
using (var iterator = fht.Log.Scan(fht.Log.BeginAddress, fht.Log.TailAddress))
{
// We seal before copying and leave it sealed after copying, so we only get one record.
while (iterator.GetNext(out var info))
{
recordCount++;
}
}
Assert.AreEqual(1, copyOnWrite.ConcurrentWriterCallCount);
Assert.AreEqual(1, recordCount);
}
finally
{
if (log != null)
{
log.Dispose();
}
}
}
