Faster and Smaller qcow2 Files With Subcluster-based Allocation

Faster and Smaller qcow2 Files With Subcluster-based Allocation

Explore the innovative subcluster-based allocation technique for qcow2 files in this informative conference talk. Delve into the structure of qcow2 files, understanding the challenges of copy-on-write operations and their impact on I/O performance and space utilization. Learn how decreasing cluster sizes affects metadata management and discover the intricacies of L1 and L2 tables. Examine the concept of subcluster allocation, its implementation details, and the benefits it brings in terms of reduced copy-on-write operations, improved I/O speed, and optimized space usage. Gain insights into the current implementation status and acknowledge the contributors to this advancement in qcow2 file technology.