* Initial checkin
* Cleaned up epochs, improved fine grain scalability.
* Added commit and recovery support.
* Added TryAppend so users can implement log throttling.
* Fasterlog lowmem (#178)
Adding support for low memory footprint (4 pages)
Added support for odd-sized payloads in presence of holes in log
Fixed concurrency issue that occurs with low num of pages
Improved max throughput by eliminating a 10ms sleep in BlockAllocate
Misc cleanup of logic to track flush and close addresses in log
* Fasterlog TryAppend (#179)
Adding truly non-blocking TryAppend functionality. See sample for how this is used.
* Fasterlog async (#180)
* Added support for TryAppend. Removed List-based batch support.
* Added non-blocking TryAppend
* Added span variant
* Fix definition of SecondChanceFraction for read cache, to be 1 - MutableFraction of the log.
* Added async FlushAndCommit
* Added batched version by separating out in-memory append and wait for commit - gives better perf as the first operation is usually sync
* Tweak async sample to get back to 2GB/sec
* Other updates:
1) Allocations can handle thousands of parallel tasks
2) Removed concept of negative address - allocations are always over available pages
3) Improved scan interface to allow user memory pooling
4) Exposed commit task
5) Cleaned up sample
* Added check for entry fitting on single page
* Added batch interface (sync and async) to log append.
* Added tailing iterator WaitAsync to wait for iteration to proceed.
* Convert Span to ReadOnlySpan for appends
* Added MemoryPool/IMemoryOwner variant of iterator
* Updated way to pin pooled memory
* Update azure-pipelines.yml
* Support minimum buffer size of just 1 page!
* Actually checking in support for 1 page in memory, added initial draft of disposing task
* Added a test
* Improved sample, changed GetMemory to use byte[] instead of Span<byte>
* Update next address of iterator if GetNext fails early.
* Added random read functionality (ReadAsync) for FasterLog. Moved GetMemory to FasterLogSettings instead of Scan. Speed up TruncateUntil. Updated nuspec.
* Ensure begin addresses commit if needed, even when tail addresses do not change. Added CommittedBeginAddress metric.
* changed test project target
* Updated random read example
* Use TrySetResult instead of SetResult, since log closure moves the task to completed state.
* Added simple version/checksum to commit info.
* Added opt-in support for per-entry 8-byte checksum (xor) in header of entry.
* Fixing issue with async enqueue.
* Fixed testcase since thread abort not supported on some platforms.
* Fixing concurrency issue with contiguous partial flush requests. Removed spin-wait for adjacent flush completion.
* Fasterlog exceptions (#189)
* Added storage exception handling, connecting to tasks.
* Cleanup of error handling, control when exception is bubbled up to user.
* Added yield in NeedToWait
* Improved iterator support in case of exception
* Added async iterator support
* Added support for persistent/recoverable named iterators.