Neha Agarwal, David Nellans, Mark Stephenson, Mike O'Connor, and Stephen W.Fast Key-Value Stores: An Idea Whose Time Has Come and Gone. Atul Adya, Robert Grandl, Daniel Myers, and Henry Qin.IBM Journal of Research and Development (2001). Memory Expansion Technology (MXT): Software Support and Performance. DaeMon improves system performance and data access costs by 2.39× and 3.06×, respectively, over the widely-adopted approach of moving data at page granularity. We evaluate DaeMon in a wide variety of workloads at different network and architecture configurations using a state-of-the-art simulator. Second, to achieve high performance and provide robustness across various network, architecture and application characteristics, we implement a synergistic approach of bandwidth partitioning, link compression, decoupled data movement of multiple granularities, and adaptive granularity selection in data movements. First, to enable scalability to multiple hardware components in the system, we enhance each compute and memory unit with specialized engines that transparently handle data migrations. This paper conducts a characterization analysis on different data movement strategies in fully disaggregated systems, evaluates their performance overheads in a variety of workloads, and introduces DaeMon, the first software-transparent mechanism to significantly alleviate data movement overheads in fully disaggregated systems.

Addressing this challenge is difficult as disaggregated systems have high runtime variability in network latencies/bandwidth, and page migration can significantly delay critical path cache line accesses in other pages. A critical challenge, however, is the high performance penalty of accessing data from a remote memory module over the network. Servers are architected as pools of processor, memory, and storage devices, organized as independent failure-isolated components interconnected by a high-bandwidth network. Resource disaggregation offers a cost effective solution to resource scaling, utilization, and failure-handling in data centers by physically separating hardware devices in a server.

Daemon darknet