public void FasterLogSimpleFastCommitTest([Values] TestUtils.DeviceType deviceType)
{
var cookie = new byte[100];
new Random().NextBytes(cookie);
var filename = path + "fastCommit" + deviceType.ToString() + ".log";
device = TestUtils.CreateTestDevice(deviceType, filename, deleteOnClose: true);
var logSettings = new FasterLogSettings {
LogDevice = device, LogChecksum = LogChecksumType.PerEntry, LogCommitManager = manager, FastCommitMode = true, TryRecoverLatest = false
};
log = new FasterLog(logSettings);
byte[] entry = new byte[entryLength];
for (int i = 0; i < entryLength; i++)
{
entry[i] = (byte)i;
}
for (int i = 0; i < numEntries; i++)
{
log.Enqueue(entry);
}
var cookie1 = new byte[100];
new Random().NextBytes(cookie1);
var commitSuccessful = log.CommitStrongly(out var commit1Addr, out _, true, cookie1, 1);
Assert.IsTrue(commitSuccessful);
for (int i = 0; i < numEntries; i++)
{
log.Enqueue(entry);
}
var cookie2 = new byte[100];
new Random().NextBytes(cookie2);
commitSuccessful = log.CommitStrongly(out var commit2Addr, out _, true, cookie2, 2);
Assert.IsTrue(commitSuccessful);
for (int i = 0; i < numEntries; i++)
{
log.Enqueue(entry);
}
var cookie6 = new byte[100];
new Random().NextBytes(cookie6);
commitSuccessful = log.CommitStrongly(out var commit6Addr, out _, true, cookie6, 6);
Assert.IsTrue(commitSuccessful);
// Wait for all metadata writes to be complete to avoid a concurrent access exception
log.Dispose();
log = null;
// be a deviant and remove commit metadata files
manager.RemoveAllCommits();
// Recovery should still work
var recoveredLog = new FasterLog(logSettings);
recoveredLog.Recover(1);
Assert.AreEqual(cookie1, recoveredLog.RecoveredCookie);
Assert.AreEqual(commit1Addr, recoveredLog.TailAddress);
recoveredLog.Dispose();
recoveredLog = new FasterLog(logSettings);
recoveredLog.Recover(2);
Assert.AreEqual(cookie2, recoveredLog.RecoveredCookie);
Assert.AreEqual(commit2Addr, recoveredLog.TailAddress);
recoveredLog.Dispose();
// Default argument should recover to most recent, if TryRecoverLatest is set
logSettings.TryRecoverLatest = true;
recoveredLog = new FasterLog(logSettings);
Assert.AreEqual(cookie6, recoveredLog.RecoveredCookie);
Assert.AreEqual(commit6Addr, recoveredLog.TailAddress);
recoveredLog.Dispose();
}