/// <summary>
/// Create new log instance
/// </summary>
/// <param name="logSettings"></param>
public FasterLog(FasterLogSettings logSettings)
{
bool oldCommitManager = false;
if (oldCommitManager)
{
logCommitManager = logSettings.LogCommitManager ??
new LocalLogCommitManager(logSettings.LogCommitFile ??
logSettings.LogDevice.FileName + ".commit");
}
else
{
logCommitManager = logSettings.LogCommitManager ??
new DeviceLogCommitCheckpointManager
(new LocalStorageNamedDeviceFactory(),
new DefaultCheckpointNamingScheme(
new FileInfo(logSettings.LogDevice.FileName).Directory.FullName));
}
if (logSettings.LogCommitManager == null)
{
disposeLogCommitManager = true;
}
// Reserve 8 byte checksum in header if requested
logChecksum = logSettings.LogChecksum;
headerSize = logChecksum == LogChecksumType.PerEntry ? 12 : 4;
getMemory = logSettings.GetMemory;
epoch = new LightEpoch();
CommittedUntilAddress = Constants.kFirstValidAddress;
CommittedBeginAddress = Constants.kFirstValidAddress;
SafeTailAddress = Constants.kFirstValidAddress;
allocator = new BlittableAllocator <Empty, byte>(
logSettings.GetLogSettings(), null,
null, epoch, CommitCallback);
allocator.Initialize();
// FasterLog is used as a read-only iterator
if (logSettings.ReadOnlyMode)
{
readOnlyMode = true;
allocator.HeadAddress = long.MaxValue;
}
Restore(out RecoveredIterators);
}
/// <summary>
/// Create new log instance
/// </summary>
/// <param name="logSettings"></param>
public FasterLog(FasterLogSettings logSettings)
{
logCommitManager = logSettings.LogCommitManager ??
new LocalLogCommitManager(logSettings.LogCommitFile ??
logSettings.LogDevice.FileName + ".commit");
// Reserve 8 byte checksum in header if requested
logChecksum = logSettings.LogChecksum;
headerSize = logChecksum == LogChecksumType.PerEntry ? 12 : 4;
getMemory = logSettings.GetMemory;
epoch = new LightEpoch();
CommittedUntilAddress = Constants.kFirstValidAddress;
CommittedBeginAddress = Constants.kFirstValidAddress;
allocator = new BlittableAllocator <Empty, byte>(
logSettings.GetLogSettings(), null,
null, epoch, CommitCallback);
allocator.Initialize();
Restore(out RecoveredIterators);
}
