public async Task FasterLogTest5([Values] LogChecksumType logChecksum)
{
log = new FasterLog(new FasterLogSettings {
LogDevice = device, PageSizeBits = 16, MemorySizeBits = 16, LogChecksum = logChecksum
});
int headerSize = logChecksum == LogChecksumType.None ? 4 : 12;
bool _disposed = false;
var commit = new Thread(() => { while (!_disposed)
{
log.Commit(true); Thread.Sleep(1);
}
});
commit.Start();
// 65536=page size|headerSize|64=log header
await log.EnqueueAndWaitForCommitAsync(new byte[65536 - headerSize - 64]);
// 65536=page size|headerSize
await log.EnqueueAndWaitForCommitAsync(new byte[65536 - headerSize]);
// 65536=page size|headerSize
await log.EnqueueAndWaitForCommitAsync(new byte[65536 - headerSize]);
// 65536=page size|headerSize
await log.EnqueueAndWaitForCommitAsync(new byte[65536 - headerSize]);
// 65536=page size|headerSize
await log.EnqueueAndWaitForCommitAsync(new byte[65536 - headerSize]);
_disposed = true;
commit.Join();
log.Dispose();
}
/// <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();
}
}
}
}