Persistent Write Log Cache with RDMA Replication in Ceph
Learn about implementing Persistent Write Log Cache with Replication in Ceph through this technical conference presentation from the Storage Networking Industry Association (SNIA). Dive into how PWL cache handles burst writes at the Ceph client side to reduce backend pressure, utilizing log-based Write Back Cache technology. Explore the advantages of persisting data to Persistent Memory (PMEM) compared to traditional volatile cache, and discover how RDMA technology enables efficient unilateral data replication to remote locations. Follow along as Intel engineer Chunmei Liu demonstrates PWL Local PMEM Layout, write operations flow, local retire flow, and the intricacies of RDMA implementation in Remote Replicated Mode. Master key concepts including client-side PMEM, RDMA replication, and the complete PWL Replicated Mirror IO process while understanding how this open-source distributed storage solution prevents data loss through replication mechanisms.