static async Task LogWriterAsync(FasterLog log, byte[] entry)
{
// Enter in some entries then wait on this separate thread
await log.EnqueueAsync(entry);
await log.EnqueueAsync(entry);
await log.EnqueueAsync(entry);
await log.WaitForCommitAsync(log.TailAddress);
}
/// <summary>
/// Async version of enqueue
/// </summary>
static async Task AsyncLogWriter(int id)
{
bool batched = false;
await Task.Yield();
if (!batched)
{
// Single commit version - append each item and wait for commit
// Needs high parallelism (NumParallelTasks) for perf
// Needs separate commit thread to perform regular commit
// Otherwise we commit only at page boundaries
while (true)
{
try
{
await log.EnqueueAndWaitForCommitAsync(staticEntry);
}
catch (Exception ex)
{
Console.WriteLine($"{nameof(AsyncLogWriter)}({id}): {ex}");
}
}
}
else
{
// Batched version - we enqueue many entries to memory,
// then wait for commit periodically
int count = 0;
while (true)
{
await log.EnqueueAsync(staticEntry);
if (count++ % 100 == 0)
{
await log.WaitForCommitAsync();
}
}
}
}
public async ValueTask WaitForCommitAsync(long untilAddress = 0, CancellationToken token = default)
{
await logger.WaitForCommitAsync(untilAddress, token);
}