In earlier versions of MCS, write caching was often handled entirely in RAM or through simpler disk-based methods. However, modern MCS I/O (Storage Optimization) utilizes a hybrid approach where writes are captured in RAM for speed and then overflowed to a file on a persistent disk once the RAM buffer is full. That persistent disk is the MCSWCDisk. How the MCSWCDisk Works
This article explores the role of the MCSWCDisk, how it functions within the MCS I/O optimization framework, and why it is essential for modern virtual desktop infrastructure (VDI) deployments. What is MCSWCDisk? mcswcdisk
This paper proposed MC-SWCDisk, a mechanism designed to resolve the software bottlenecks in high-speed storage write caching. By adapting the Mellor-Crummey and Scott (MCS) algorithm to the disk I/O context, we demonstrated that lock contention can be effectively mitigated. The results confirm that as multicore parallelism increases, sophisticated queue-based locking is essential for maintaining the performance of Write Cache Disk subsystems. Future work will explore integrating MCS with persistent memory (pmem) devices to further reduce latency in the commit phase. In earlier versions of MCS, write caching was