/// <inheritdoc />
public virtual void GlobalBeforeEnteringState <Key, Value, Input, Output, Context, Functions>(SystemState next,
FasterKV <Key, Value, Input, Output, Context, Functions> faster)
where Key : new()
where Value : new()
where Functions : IFunctions <Key, Value, Input, Output, Context>
{
switch (next.phase)
{
case Phase.PREPARE:
if (faster._hybridLogCheckpointToken == default)
{
faster._hybridLogCheckpointToken = Guid.NewGuid();
faster.InitializeHybridLogCheckpoint(faster._hybridLogCheckpointToken, next.version);
}
faster.ObtainCurrentTailAddress(ref faster._hybridLogCheckpoint.info.startLogicalAddress);
break;
case Phase.WAIT_FLUSH:
faster._hybridLogCheckpoint.info.headAddress = faster.hlog.HeadAddress;
faster._hybridLogCheckpoint.info.beginAddress = faster.hlog.BeginAddress;
break;
case Phase.PERSISTENCE_CALLBACK:
// Collect object log offsets only after flushes
// are completed
var seg = faster.hlog.GetSegmentOffsets();
if (seg != null)
{
faster._hybridLogCheckpoint.info.objectLogSegmentOffsets = new long[seg.Length];
Array.Copy(seg, faster._hybridLogCheckpoint.info.objectLogSegmentOffsets, seg.Length);
}
if (faster._activeSessions != null)
{
// write dormant sessions to checkpoint
foreach (var kvp in faster._activeSessions)
{
faster.AtomicSwitch(kvp.Value.ctx, kvp.Value.ctx.prevCtx, next.version - 1);
}
}
faster.WriteHybridLogMetaInfo();
break;
case Phase.REST:
faster._hybridLogCheckpointToken = default;
faster._hybridLogCheckpoint.Reset();
var nextTcs = new TaskCompletionSource <LinkedCheckpointInfo>(TaskCreationOptions.RunContinuationsAsynchronously);
faster.checkpointTcs.SetResult(new LinkedCheckpointInfo {
NextTask = nextTcs.Task
});
faster.checkpointTcs = nextTcs;
break;
}
}
/// <inheritdoc />
public virtual void GlobalBeforeEnteringState <Key, Value>(SystemState next,
FasterKV <Key, Value> faster)
where Key : new()
where Value : new()
{
switch (next.phase)
{
case Phase.PREPARE:
if (faster._hybridLogCheckpoint.IsDefault())
{
faster._hybridLogCheckpointToken = Guid.NewGuid();
faster.InitializeHybridLogCheckpoint(faster._hybridLogCheckpointToken, next.version);
}
faster.ObtainCurrentTailAddress(ref faster._hybridLogCheckpoint.info.startLogicalAddress);
break;
case Phase.WAIT_FLUSH:
faster._hybridLogCheckpoint.info.headAddress = faster.hlog.HeadAddress;
faster._hybridLogCheckpoint.info.beginAddress = faster.hlog.BeginAddress;
break;
case Phase.PERSISTENCE_CALLBACK:
// Collect object log offsets only after flushes
// are completed
var seg = faster.hlog.GetSegmentOffsets();
if (seg != null)
{
faster._hybridLogCheckpoint.info.objectLogSegmentOffsets = new long[seg.Length];
Array.Copy(seg, faster._hybridLogCheckpoint.info.objectLogSegmentOffsets, seg.Length);
}
// Temporarily block new sessions from starting, which may add an entry to the table and resize the
// dictionary. There should be minimal contention here.
lock (faster._activeSessions)
// write dormant sessions to checkpoint
foreach (var kvp in faster._activeSessions)
{
kvp.Value.AtomicSwitch(next.version - 1);
}
faster.WriteHybridLogMetaInfo();
break;
case Phase.REST:
faster._hybridLogCheckpoint.Reset();
var nextTcs = new TaskCompletionSource <LinkedCheckpointInfo>(TaskCreationOptions.RunContinuationsAsynchronously);
faster.checkpointTcs.SetResult(new LinkedCheckpointInfo {
NextTask = nextTcs.Task
});
faster.checkpointTcs = nextTcs;
break;
}
}
/// <inheritdoc />
public virtual void GlobalBeforeEnteringState <Key, Value>(SystemState next,
FasterKV <Key, Value> faster)
{
switch (next.Phase)
{
case Phase.PREPARE:
lastVersion = faster.systemState.Version;
if (faster._hybridLogCheckpoint.IsDefault())
{
faster._hybridLogCheckpointToken = Guid.NewGuid();
faster.InitializeHybridLogCheckpoint(faster._hybridLogCheckpointToken, next.Version);
}
faster._hybridLogCheckpoint.info.version = next.Version;
faster.ObtainCurrentTailAddress(ref faster._hybridLogCheckpoint.info.startLogicalAddress);
break;
case Phase.WAIT_FLUSH:
faster._hybridLogCheckpoint.info.headAddress = faster.hlog.HeadAddress;
faster._hybridLogCheckpoint.info.beginAddress = faster.hlog.BeginAddress;
faster._hybridLogCheckpoint.info.nextVersion = next.Version;
break;
case Phase.PERSISTENCE_CALLBACK:
CollectMetadata(next, faster);
faster.WriteHybridLogMetaInfo();
faster.lastVersion = lastVersion;
break;
case Phase.REST:
faster._hybridLogCheckpoint.Dispose();
var nextTcs = new TaskCompletionSource <LinkedCheckpointInfo>(TaskCreationOptions.RunContinuationsAsynchronously);
faster.checkpointTcs.SetResult(new LinkedCheckpointInfo {
NextTask = nextTcs.Task
});
faster.checkpointTcs = nextTcs;
break;
}
}
