/// <summary>
/// Initiate log-only checkpoint
/// </summary>
/// <param name="token">Checkpoint token</param>
/// <param name="checkpointType">Checkpoint type</param>
/// <param name="tryIncremental">For snapshot, try to store as incremental delta over last snapshot</param>
/// <param name="targetVersion">
/// intended version number of the next version. Checkpoint will not execute if supplied version is not larger
/// than current version. Actual new version may have version number greater than supplied number. If the supplied
/// number is -1, checkpoint will unconditionally create a new version.
/// </param>
/// <returns>Whether we could initiate the checkpoint. Use CompleteCheckpointAsync to wait completion.</returns>
public bool TakeHybridLogCheckpoint(out Guid token, CheckpointType checkpointType, bool tryIncremental = false,
long targetVersion = -1)
{
ISynchronizationTask backend;
if (checkpointType == CheckpointType.FoldOver)
{
backend = new FoldOverCheckpointTask();
}
else if (checkpointType == CheckpointType.Snapshot)
{
if (tryIncremental && _lastSnapshotCheckpoint.info.guid != default && _lastSnapshotCheckpoint.info.finalLogicalAddress > hlog.FlushedUntilAddress)
{
backend = new IncrementalSnapshotCheckpointTask();
}
else
{
backend = new SnapshotCheckpointTask();
}
}
else
{
throw new FasterException("Unsupported checkpoint type");
}
var result = StartStateMachine(new HybridLogCheckpointStateMachine(backend, targetVersion));
token = _hybridLogCheckpointToken;
return(result);
}
private void Prepare(CheckpointType checkpointType, out string logPath, out string objPath, out IDevice log, out IDevice objlog, out FasterKV <MyKey, MyValue> h, out MyContext context)
{
logPath = Path.Combine(FasterFolderPath, $"FasterRecoverTests.log");
objPath = Path.Combine(FasterFolderPath, $"FasterRecoverTests_HEAP.log");
log = Devices.CreateLogDevice(logPath);
objlog = Devices.CreateLogDevice(objPath);
h = new FasterKV
<MyKey, MyValue>
(1L << 20,
new LogSettings
{
LogDevice = log,
ObjectLogDevice = objlog,
SegmentSizeBits = 12,
MemorySizeBits = 12,
PageSizeBits = 9
},
new CheckpointSettings()
{
CheckpointDir = Path.Combine(FasterFolderPath, "check-points"),
CheckPointType = checkpointType
},
new SerializerSettings <MyKey, MyValue> {
keySerializer = () => new MyKeySerializer(), valueSerializer = () => new MyValueSerializer()
}
);
context = new MyContext();
}
public void ObjectRecoveryTest1([Values] CheckpointType checkpointType)
{
Prepare(checkpointType, out string logPath, out string objPath, out IDevice log, out IDevice objlog, out FasterKV <MyKey, MyValue, MyInput, MyOutput, MyContext, MyFunctions> h, out MyContext context);
h.StartSession();
Write(h, context);
h.Refresh();
Read(h, context, false);
h.TakeFullCheckpoint(out Guid CheckPointID);
h.CompleteCheckpoint(true);
Destroy(log, objlog, h);
Prepare(checkpointType, out logPath, out objPath, out log, out objlog, out h, out context);
h.Recover();
h.StartSession();
Read(h, context, true);
Destroy(log, objlog, h);
}
public void ObjectRecoveryTest1(
[Values] CheckpointType checkpointType,
[Range(100, 1500, 600)] int iterations)
{
this.iterations = iterations;
Prepare(checkpointType, out _, out _, out IDevice log, out IDevice objlog, out FasterKV <MyKey, MyValue> h, out MyContext context);
var session1 = h.For(new MyFunctions()).NewSession <MyFunctions>();
Write(session1, context, h);
Read(session1, context, false);
session1.Dispose();
h.TakeFullCheckpoint(out _);
h.CompleteCheckpointAsync().GetAwaiter().GetResult();
Destroy(log, objlog, h);
Prepare(checkpointType, out _, out _, out log, out objlog, out h, out context);
h.Recover();
var session2 = h.For(new MyFunctions()).NewSession <MyFunctions>();
Read(session2, context, true);
session2.Dispose();
Destroy(log, objlog, h);
}
public void AddCheckpoint(
string happeningId,
string id,
CheckpointType checkpointType,
int order,
string name,
double latitude,
double longitude,
decimal distanceFromPrevious,
decimal distanceFromStart)
{
// Only one can be start
this.ValidateUniqueCheckpointType(checkpointType, CheckpointType.Start);
// Only one can be end
this.ValidateUniqueCheckpointType(checkpointType, CheckpointType.Start);
// All ok, add
this.Apply(
new CheckpointValidated(
happeningId,
id,
order,
checkpointType,
name,
latitude,
longitude,
distanceFromPrevious,
distanceFromStart));
}
public void ObjectRecoveryTest1([Values] CheckpointType checkpointType)
{
Prepare(checkpointType, out _, out _, out IDevice log, out IDevice objlog, out FasterKV <MyKey, MyValue, MyInput, MyOutput, MyContext, MyFunctions> h, out MyContext context);
var session1 = h.NewSession();
Write(session1, context);
Read(session1, context, false);
session1.Dispose();
h.TakeFullCheckpoint(out _);
h.CompleteCheckpointAsync().GetAwaiter().GetResult();
Destroy(log, objlog, h);
Prepare(checkpointType, out _, out _, out log, out objlog, out h, out context);
h.Recover();
var session2 = h.NewSession();
Read(session2, context, true);
session2.Dispose();
Destroy(log, objlog, h);
}
/// <summary>
/// Initiate full checkpoint
/// </summary>
/// <param name="token">Checkpoint token</param>
/// <param name="checkpointType">Checkpoint type</param>
/// <param name="targetVersion">
/// intended version number of the next version. Checkpoint will not execute if supplied version is not larger
/// than current version. Actual new version may have version number greater than supplied number. If the supplied
/// number is -1, checkpoint will unconditionally create a new version.
/// </param>
/// <returns>
/// Whether we successfully initiated the checkpoint (initiation may
/// fail if we are already taking a checkpoint or performing some other
/// operation such as growing the index). Use CompleteCheckpointAsync to wait completion.
/// </returns>
public bool TakeFullCheckpoint(out Guid token, CheckpointType checkpointType, long targetVersion = -1)
{
ISynchronizationTask backend;
if (checkpointType == CheckpointType.FoldOver)
{
backend = new FoldOverCheckpointTask();
}
else if (checkpointType == CheckpointType.Snapshot)
{
backend = new SnapshotCheckpointTask();
}
else
{
throw new FasterException("Unsupported full checkpoint type");
}
var result = StartStateMachine(new FullCheckpointStateMachine(backend, targetVersion));
if (result)
{
token = _hybridLogCheckpointToken;
}
else
{
token = default;
}
return(result);
}
private bool IsCheckpointSafe(Guid token, CheckpointType checkpointType)
{
switch (checkpointType)
{
case CheckpointType.INDEX_ONLY:
{
var dir = new DirectoryInfo(directoryConfiguration.GetIndexCheckpointFolder(token));
return(File.Exists(dir.FullName + Path.DirectorySeparatorChar + "completed.dat"));
}
case CheckpointType.HYBRID_LOG_ONLY:
{
var dir = new DirectoryInfo(directoryConfiguration.GetHybridLogCheckpointFolder(token));
return(File.Exists(dir.FullName + Path.DirectorySeparatorChar + "completed.dat"));
}
case CheckpointType.FULL:
{
return(IsCheckpointSafe(token, CheckpointType.INDEX_ONLY) &&
IsCheckpointSafe(token, CheckpointType.HYBRID_LOG_ONLY));
}
default:
return(false);
}
}
public async ValueTask ObjectRecoveryTest3(
[Values] CheckpointType checkpointType,
[Values(2000)] int iterations,
[Values] bool isAsync)
{
this.iterations = iterations;
Prepare(checkpointType, out _, out _, out IDevice log, out IDevice objlog, out FasterKV <MyKey, MyValue> h, out MyContext context);
var session1 = h.For(new MyFunctions()).NewSession <MyFunctions>();
var tokens = Write(session1, context, h);
Read(session1, context, false, iterations);
session1.Dispose();
h.TakeHybridLogCheckpoint(out Guid token);
h.CompleteCheckpointAsync().GetAwaiter().GetResult();
tokens.Add((iterations, token));
Destroy(log, objlog, h);
foreach (var item in tokens)
{
Prepare(checkpointType, out _, out _, out log, out objlog, out h, out context);
if (isAsync)
{
await h.RecoverAsync(default, item.Item2);
public void RecoveryCheck2([Values] CheckpointType checkpointType)
{
using var s1 = fht1.NewSession(new SimpleFunctions <long, long>());
using var fht2 = new FasterKV <long, long>
(1L << 10,
logSettings: new LogSettings { LogDevice = log, MutableFraction = 1, PageSizeBits = 10, MemorySizeBits = 20 },
checkpointSettings: new CheckpointSettings { CheckpointDir = path }
);
for (int i = 0; i < 5; i++)
{
for (long key = 1000 * i; key < 1000 * i + 1000; key++)
{
s1.Upsert(ref key, ref key);
}
fht1.TakeHybridLogCheckpointAsync(checkpointType).GetAwaiter().GetResult();
fht2.Recover();
Assert.IsTrue(fht1.Log.HeadAddress == fht2.Log.HeadAddress);
Assert.IsTrue(fht1.Log.ReadOnlyAddress == fht2.Log.ReadOnlyAddress);
Assert.IsTrue(fht1.Log.TailAddress == fht2.Log.TailAddress);
using var s2 = fht2.NewSession(new SimpleFunctions <long, long>());
for (long key = 0; key < 1000 * i + 1000; key++)
{
long output = default;
var status = s2.Read(ref key, ref output);
Assert.IsTrue(status == Status.OK && output == key);
}
}
}
public DynamicRaceCheckpoint(CheckpointType type, Vector3 position, Vector3 nextPosition,
float size = 3.0f, int worldid = -1, int interiorid = -1, BasePlayer player = null,
float streamdistance = 100.0f, DynamicArea area = null, int priority = 0)
{
Id = Internal.CreateDynamicRaceCP((int)type, position.X, position.Y, position.Z, nextPosition.X,
nextPosition.Y, nextPosition.Z, size, worldid, interiorid, player?.Id ?? -1,
streamdistance, area?.Id ?? -1, priority);
}
public async ValueTask LocalDeviceSimpleRecoveryTest([Values] CheckpointType checkpointType, [Values] bool isAsync, [Values] bool testCommitCookie)
{
checkpointManager = new DeviceLogCommitCheckpointManager(
new LocalStorageNamedDeviceFactory(),
new DefaultCheckpointNamingScheme($"{TestUtils.MethodTestDir}/{TestUtils.AzureTestDirectory}"));
await SimpleRecoveryTest1_Worker(checkpointType, isAsync, testCommitCookie);
checkpointManager.PurgeAll();
}
public async ValueTask PageBlobSimpleRecoveryTest([Values] CheckpointType checkpointType, [Values] bool isAsync, [Values] bool testCommitCookie)
{
TestUtils.IgnoreIfNotRunningAzureTests();
checkpointManager = new DeviceLogCommitCheckpointManager(
new AzureStorageNamedDeviceFactory(TestUtils.AzureEmulatedStorageString),
new DefaultCheckpointNamingScheme($"{TestUtils.AzureTestContainer}/{TestUtils.AzureTestDirectory}"));
await SimpleRecoveryTest1_Worker(checkpointType, isAsync, testCommitCookie);
checkpointManager.PurgeAll();
}
public void LocalDeviceSimpleRecoveryTest(CheckpointType checkpointType)
{
ICheckpointManager checkpointManager = new DeviceLogCommitCheckpointManager(
new LocalStorageNamedDeviceFactory(),
new DefaultCheckpointNamingScheme($"{TEST_CONTAINER}/PageBlobSimpleRecoveryTest"));
SimpleRecoveryTest1(checkpointType, checkpointManager);
checkpointManager.PurgeAll();
checkpointManager.Dispose();
}
public void ChangeType(string id, CheckpointType newType)
{
// Only one can be start
this.ValidateUniqueCheckpointType(newType, CheckpointType.Start);
// Only one can be end
this.ValidateUniqueCheckpointType(newType, CheckpointType.Start);
// All ok, change
this.Apply(new CheckpointTypeChangeValidated(id, newType));
}
/// <summary>
/// Take full (index + log) checkpoint
/// </summary>
/// <param name="checkpointType">Checkpoint type</param>
/// <param name="cancellationToken">Cancellation token</param>
/// <returns>
/// (bool success, Guid token)
/// success: Whether we successfully initiated the checkpoint (initiation may
/// fail if we are already taking a checkpoint or performing some other
/// operation such as growing the index).
/// token: Token for taken checkpoint
/// Await task to complete checkpoint, if initiated successfully
/// </returns>
public async ValueTask <(bool success, Guid token)> TakeFullCheckpointAsync(CheckpointType checkpointType, CancellationToken cancellationToken = default)
{
var success = TakeFullCheckpoint(out Guid token, checkpointType);
if (success)
{
await CompleteCheckpointAsync(cancellationToken);
}
return(success, token);
}
public async ValueTask LocalDeviceSimpleRecoveryTest([Values] CheckpointType checkpointType, [Values] bool isAsync)
{
ICheckpointManager checkpointManager = new DeviceLogCommitCheckpointManager(
new LocalStorageNamedDeviceFactory(),
new DefaultCheckpointNamingScheme($"{TEST_CONTAINER}/PageBlobSimpleRecoveryTest"));
await SimpleRecoveryTest1_Worker(checkpointType, checkpointManager, isAsync);
checkpointManager.PurgeAll();
checkpointManager.Dispose();
}
/// <summary>
/// Take full (index + log) checkpoint
/// </summary>
/// <param name="checkpointType">Checkpoint type</param>
/// <param name="cancellationToken">Cancellation token</param>
/// <param name="targetVersion">
/// intended version number of the next version. Checkpoint will not execute if supplied version is not larger
/// than current version. Actual new version may have version number greater than supplied number. If the supplied
/// number is -1, checkpoint will unconditionally create a new version.
/// </param>
/// <returns>
/// (bool success, Guid token)
/// success: Whether we successfully initiated the checkpoint (initiation may
/// fail if we are already taking a checkpoint or performing some other
/// operation such as growing the index).
/// token: Token for taken checkpoint
/// Await task to complete checkpoint, if initiated successfully
/// </returns>
public async ValueTask <(bool success, Guid token)> TakeFullCheckpointAsync(CheckpointType checkpointType,
CancellationToken cancellationToken = default, long targetVersion = -1)
{
var success = TakeFullCheckpoint(out Guid token, checkpointType, targetVersion);
if (success)
{
await CompleteCheckpointAsync(cancellationToken).ConfigureAwait(false);
}
return(success, token);
}
private void ValidateUniqueCheckpointType(CheckpointType checkpointType, CheckpointType uniqueType)
{
if (checkpointType != uniqueType)
{
return;
}
if (this.State.Checkpoints.Any(m => m.CheckpointType == uniqueType))
{
throw new InvalidOperationException();
}
}
public void PageBlobSimpleRecoveryTest(CheckpointType checkpointType)
{
if ("yes".Equals(Environment.GetEnvironmentVariable("RunAzureTests")))
{
ICheckpointManager checkpointManager = new DeviceLogCommitCheckpointManager(
new AzureStorageNamedDeviceFactory(EMULATED_STORAGE_STRING),
new DefaultCheckpointNamingScheme($"{TEST_CONTAINER}/PageBlobSimpleRecoveryTest"));
SimpleRecoveryTest1(checkpointType, checkpointManager);
checkpointManager.PurgeAll();
checkpointManager.Dispose();
}
}
public async ValueTask PageBlobSimpleRecoveryTest([Values] CheckpointType checkpointType, [Values] bool isAsync)
{
if ("yes".Equals(Environment.GetEnvironmentVariable("RunAzureTests")))
{
ICheckpointManager checkpointManager = new DeviceLogCommitCheckpointManager(
new AzureStorageNamedDeviceFactory(EMULATED_STORAGE_STRING),
new DefaultCheckpointNamingScheme($"{TEST_CONTAINER}/PageBlobSimpleRecoveryTest"));
await SimpleRecoveryTest1_Worker(checkpointType, checkpointManager, isAsync);
checkpointManager.PurgeAll();
checkpointManager.Dispose();
}
}
[InlineData(50_000, 1, CheckpointType.Snapshot)] //OK
public async Task AddRestartColdRead(int loops, int step, CheckpointType checkpointType)
{
var options = GetOptions($"{nameof(AddRestartGetValues)}-{loops}");
options.CheckPointType = checkpointType;
options.DeleteOnClose = false;
Stopwatch watch = new Stopwatch();
watch.Reset();
FasterDictionary <int, string> .ReadResult result;
using (var dictionary = new FasterDictionary <int, string>(TestHelper.GetKeyComparer <int>(), options))
{
for (var i = 0; i < loops; i++)
{
var guid = GetGuid(i);
dictionary.Upsert(i, guid).Dismiss();
}
await dictionary.Ping();
for (var i = 0; i < loops; i += step)
{
var guid = GetGuid(loops - 1);
result = await dictionary.TryGet(loops - 1);
Assert.True(result.Found);
Assert.Equal(guid.ToString(), result.Value);
}
await dictionary.Save();
}
for (var k = 0; k < 3; k++)
{
using (var dictionary = new FasterDictionary <int, string>(TestHelper.GetKeyComparer <int>(), options))
{
await dictionary.Ping();
for (var i = 0; i < loops; i += step)
{
var guid = GetGuid(loops - 1);
result = await dictionary.TryGet(loops - 1);
Assert.True(result.Found);
Assert.Equal(guid.ToString(), result.Value);
}
}
}
}
private bool InternalTakeCheckpoint(CheckpointType type)
{
if (_systemState.phase == Phase.REST)
{
var context = (long)type;
var currentState = SystemState.Make(Phase.REST, _systemState.version);
var nextState = GetNextState(currentState, type);
return(GlobalMoveToNextState(currentState, nextState, ref context));
}
else
{
return(false);
}
}
[InlineData(1_000_000, CheckpointType.FoldOver)] //FAIL
public async Task AddUpdateGet(int loops, CheckpointType checkpointType)
{
var options = GetOptions($"{nameof(AddIterateUpdateIterate)}-{loops}");
options.CheckPointType = checkpointType;
options.DeleteOnClose = false;
FasterDictionary <int, string> .ReadResult result;
using (var dictionary = new FasterDictionary <int, string>(TestHelper.GetKeyComparer <int>(), options))
{
for (var i = 0; i < loops; i++)
{
dictionary.Upsert(i, (i + 1).ToString()).Dismiss();
}
await dictionary.Save();
}
using (var dictionary = new FasterDictionary <int, string>(TestHelper.GetKeyComparer <int>(), options))
{
for (var i = 0; i < loops; i++)
{
dictionary.Upsert(i, (i + 2).ToString()).Dismiss();
}
await dictionary.Save();
}
options.DeleteOnClose = true;
using (var dictionary = new FasterDictionary <int, string>(TestHelper.GetKeyComparer <int>(), options))
{
for (var i = 0; i < 100; i++)
{
var guid = GetGuid(i);
result = await dictionary.TryGet(i);
Assert.True(result.Found);
Assert.Equal((result.Key + 2).ToString(), result.Value);
}
result = await dictionary.TryGet(loops);
Assert.False(result.Found);
}
}
/// <summary>
/// Create FASTER instance
/// </summary>
/// <param name="size">Size of core index (#cache lines)</param>
/// <param name="comparer">FASTER equality comparer for key</param>
/// <param name="functions">Callback functions</param>
/// <param name="logSettings">Log settings</param>
/// <param name="checkpointSettings">Checkpoint settings</param>
/// <param name="serializerSettings">Serializer settings</param>
public FasterKV(long size, Functions functions, LogSettings logSettings, CheckpointSettings checkpointSettings = null, SerializerSettings <Key, Value> serializerSettings = null, IFasterEqualityComparer <Key> comparer = null)
{
if (comparer != null)
{
this.comparer = comparer;
}
else
{
if (typeof(IFasterEqualityComparer <Key>).IsAssignableFrom(typeof(Key)))
{
this.comparer = new Key() as IFasterEqualityComparer <Key>;
}
else
{
Console.WriteLine("***WARNING*** Creating default FASTER key equality comparer based on potentially slow EqualityComparer<Key>.Default. To avoid this, provide a comparer (IFasterEqualityComparer<Key>) as an argument to FASTER's constructor, or make Key implement the interface IFasterEqualityComparer<Key>");
this.comparer = FasterEqualityComparer <Key> .Default;
}
}
if (checkpointSettings == null)
{
checkpointSettings = new CheckpointSettings();
}
directoryConfiguration = new DirectoryConfiguration(checkpointSettings.CheckpointDir);
FoldOverSnapshot = checkpointSettings.CheckPointType == core.CheckpointType.FoldOver;
CopyReadsToTail = logSettings.CopyReadsToTail;
this.functions = functions;
if (Utility.IsBlittable <Key>() && Utility.IsBlittable <Value>())
{
hlog = new BlittableAllocator <Key, Value>(logSettings, this.comparer);
}
else
{
hlog = new GenericAllocator <Key, Value>(logSettings, serializerSettings, this.comparer);
}
hlog.Initialize();
sectorSize = (int)logSettings.LogDevice.SectorSize;
Initialize(size, sectorSize);
_systemState = default(SystemState);
_systemState.phase = Phase.REST;
_systemState.version = 1;
_checkpointType = CheckpointType.HYBRID_LOG_ONLY;
}
public FasterKV(long size, IDevice logDevice, IDevice objectLogDevice, string checkpointDir = null)
{
if (checkpointDir != null)
{
Config.CheckpointDirectory = checkpointDir;
}
hlog = new PersistentMemoryMalloc(logDevice, objectLogDevice);
var recordSize = Layout.EstimatePhysicalSize(null, null);
Initialize(size, hlog.GetSectorSize());
_systemState = default(SystemState);
_systemState.phase = Phase.REST;
_systemState.version = 1;
_checkpointType = CheckpointType.HYBRID_LOG_ONLY;
}
public RecoveryStatus(int capacity,
long startPage,
long endPage, long untilAddress, CheckpointType checkpointType)
{
this.capacity = capacity;
this.startPage = startPage;
this.endPage = endPage;
this.untilAddress = untilAddress;
this.checkpointType = checkpointType;
readStatus = new ReadStatus[capacity];
flushStatus = new FlushStatus[capacity];
for (int i = 0; i < capacity; i++)
{
flushStatus[i] = FlushStatus.Done;
readStatus[i] = ReadStatus.Pending;
}
}
public async ValueTask RecoveryCheck1([Values] CheckpointType checkpointType, [Values] bool isAsync, [Values] bool useReadCache, [Values(128, 1 << 10)] int size)
{
using var fht1 = new FasterKV <long, long>
(size,
logSettings: new LogSettings { LogDevice = log, MutableFraction = 1, PageSizeBits = 10, MemorySizeBits = 20, ReadCacheSettings = useReadCache ? new ReadCacheSettings() : null },
checkpointSettings: new CheckpointSettings { CheckpointDir = path }
);
using var s1 = fht1.NewSession(new MyFunctions());
for (long key = 0; key < 1000; key++)
{
s1.Upsert(ref key, ref key);
}
if (useReadCache)
{
fht1.Log.FlushAndEvict(true);
for (long key = 0; key < 1000; key++)
{
long output = default;
var status = s1.Read(ref key, ref output);
if (status != Status.PENDING)
{
Assert.AreEqual(Status.OK, status, $"status = {status}");
Assert.AreEqual(key, output, $"output = {output}");
}
}
s1.CompletePending(true);
}
var task = fht1.TakeFullCheckpointAsync(checkpointType);
using var fht2 = new FasterKV <long, long>
(size,
logSettings: new LogSettings { LogDevice = log, MutableFraction = 1, PageSizeBits = 10, MemorySizeBits = 20, ReadCacheSettings = useReadCache ? new ReadCacheSettings() : null },
checkpointSettings: new CheckpointSettings { CheckpointDir = path }
);
if (isAsync)
{
var(status, token) = await task;
await fht2.RecoverAsync(default, token);
/// <summary>
/// Create FASTER instance
/// </summary>
/// <param name="size"></param>
/// <param name="logSettings"></param>
/// <param name="checkpointSettings"></param>
public FasterKV(long size, LogSettings logSettings, CheckpointSettings checkpointSettings = null)
{
if (checkpointSettings == null)
{
checkpointSettings = new CheckpointSettings();
}
Config.CheckpointDirectory = checkpointSettings.CheckpointDir;
FoldOverSnapshot = checkpointSettings.CheckPointType == core.CheckpointType.FoldOver;
hlog = new PersistentMemoryMalloc(logSettings, this);
var recordSize = Layout.EstimatePhysicalSize(null, null);
Initialize(size, hlog.GetSectorSize());
_systemState = default(SystemState);
_systemState.phase = Phase.REST;
_systemState.version = 1;
_checkpointType = CheckpointType.HYBRID_LOG_ONLY;
}
private bool InternalTakeCheckpoint(CheckpointType type)
{
if (_systemState.phase == Phase.GC)
{
Debug.WriteLine("Forcing completion of GC");
GarbageCollectBuckets(0, true);
}
if (_systemState.phase == Phase.REST)
{
var context = (long)type;
var currentState = SystemState.Make(Phase.REST, _systemState.version);
var nextState = GetNextState(currentState, type);
return(GlobalMoveToNextState(currentState, nextState, ref context));
}
else
{
return(false);
}
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="number"></param>
/// <param name="id"></param>
public ArbiterCheckpoint(int number, IAreaSubtypeWaypointId id)
{
this.CheckpointNumber = number;
this.WaypointId = id;
this.Type = CheckpointType.Normal;
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="number"></param>
/// <param name="id"></param>
public ArbiterCheckpoint(int number, IAreaSubtypeWaypointId id, CheckpointType type)
{
this.CheckpointNumber = number;
this.WaypointId = id;
this.Type = type;
}