Performance
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Reading Group. Exploiting Nil-Externality for Fast Replicated Storage
85th DistSys reading group meeting discussed “Exploiting Nil-Externality for Fast Replicated Storage” SOSP’21 paper by Aishwarya Ganesan, Ramnatthan Alagappan, Andrea C. Arpaci-Dusseau, and Remzi H. Arpaci-Dusseau. The paper uses an old trick of delaying the execution of some operations to improve the throughput while maintaining strong consistency. Consistency is an externally-observable property, and simple strategies,…
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Reading Group Special Session: Fast General Purpose Transactions in Apache Cassandra
Modern distributed databases employ leader-based consensus protocols to achieve consistency, entailing certain trade-offs: typically either a scalability bottleneck or weak isolation. Leaderless protocols have been proposed to address these and other shortcomings of leader-based techniques, but these have not yet materialized into production systems. This paper outlines compromises entailed by existing leaderless protocols versus leader-based…
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Reading Group. Characterizing and Optimizing Remote Persistent Memory with RDMA and NVM
We have looked at the “Characterizing and Optimizing Remote Persistent Memory with RDMA and NVM” ATC’21 paper. This paper investigates a combination of two promising technologies: Remote Direct Memory Access (RDMA) and Non-Volatile Memory (NVM). We have discussed both of these in our reading group before. RDMA allows efficient access to the remote server’s memory,…
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Reading Group. Meerkat: Multicore-Scalable Replicated Transactions Following the Zero-Coordination Principle
Our 72nd paper was on avoiding coordination as much as possible. We looked at the “Meerkat: Multicore-Scalable Replicated Transactions Following the Zero-Coordination Principle” EuroSys’20 paper by Adriana Szekeres, Michael Whittaker, Jialin Li, Naveen Kr. Sharma, Arvind Krishnamurthy, Dan R. K. Ports, Irene Zhang. As the name suggests, this paper discusses coordination-free distributed transaction execution. In…
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Reading Group. Evolution of Development Priorities in Key-value Stores Serving Large-scale Applications: The RocksDB Experience
On Wednesday, we had our 26th reading group meeting, discussing RocksDB with a help of a recent experience paper: “Evolution of Development Priorities in Key-value Stores Serving Large-scale Applications: The RocksDB Experience.” Single-server key-value storage systems are crucial for so many distributed systems and databases. For distributed folks like myself, these often remain black-boxes that…
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One Page Summary: “milliScope: a Fine-Grained Monitoring Framework for Performance Debugging of n-Tier Web Services”
Authors of the ICDCS2017 milliScope paper attack an interesting monitoring problem for distributed systems: detecting and determining a cause of short-lived events in the system. In particular, they address the issue of identifying very short bottlenecks (VSBs) in distributed web services. VSBs manifest themselves as performance degradation of a small number of requests, however they…
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Recent Posts
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