tail latency | BestHub

Didi Tech

Aug 28, 2020 · Operations

Ceph Performance Optimization: Lock-Related Issues and Solutions

The article details how Didi’s large‑scale Ceph deployment suffered from high tail latency due to long‑held and coarse‑grained locks, and describes a series of fixes—including asynchronous read threads, fine‑grained object caches, per‑thread lock‑free logging, and lock‑free filestore apply—that cut latency by up to 90 % and more than doubled read throughput.

BluestoreCephDistributed Storage

0 likes · 12 min read

Ceph Performance Optimization: Lock-Related Issues and Solutions

Efficient Ops

Apr 27, 2016 · Operations

How 1% Slow Requests Cause 63% Latency: Mastering Tail Latency in Distributed Systems

This article explains why a tiny fraction of slow requests can dominate overall service latency, explores their causes—especially slow nodes on the query path—and shows how proper tracing and analysis can improve response times and cut infrastructure costs.

Distributed Systemsbackend performanceperformance tracing

0 likes · 11 min read

How 1% Slow Requests Cause 63% Latency: Mastering Tail Latency in Distributed Systems