Metastable Failures in Distributed Systems – Aleksey Charapko
Metastability is a stable state of a dynamical system other than the system’s state of least energy. – Wikipedia Distributed systems often fail spectacularly and unpredictably. They are a cause for a headache and sleepless on-call nights for way too many engineers. And this is despite lots of efforts to understand the failures, and all the tools and “best practices” we have to contain and/or preve
Re: ゼロから始める監視設計
世間では、情報システムの運用・監視の「自動化」というキーワードがもてはやされがちで、各種のツール・プロダクト等が出てくる昨今です。しかし、「自動化」の実態は深い霧のベールに包まれていると感じていませんか。今回は、以下の現場視点でこのベールを脱がしてみたいと思います。 July Tech Festa 2016 発表資料 #jtf2016 平成28年7月24日(日)
systemd.unit
Description¶A unit file is a plain text ini-style file that encodes information about a service, a socket, a device, a mount point, an automount point, a swap file or partition, a start-up target, a watched file system path, a timer controlled and supervised by systemd(1), a resource management slice or a group of externally created processes. See systemd.syntax(7) for a general description of the
Heka — Heka 0.10.0 documentation
Heka¶ Heka is an open source stream processing software system developed by Mozilla. Heka is a “Swiss Army Knife” type tool for data processing, useful for a wide variety of different tasks, such as: Loading and parsing log files from a file system. Accepting statsd type metrics data for aggregation and forwarding to upstream time series data stores such as graphite or InfluxDB. Launching external
Prometheus: A Next-Generation Monitoring System (Talk) | USENIX
Prometheus is a popular open-source monitoring system and time series database written in Go. It features a multi-dimensional data model, a flexible query language, and integrates aspects all the way from client-side instrumentation to alerting. In an introductory talk, we will explain the architecture of Prometheus and the motivation behind it. Taking the instrumentation and monitoring of service
Pistachio: co-locate the data and compute for... | Yahoo Engineering
Pistachio: co-locate the data and compute for fastest cloud compute https://github.com/yahoo/Pistachio is a distributed key value store system. Data can be replicated with n replicas with strong consistency guarantees. Up to (n-1) failures can be tolerated. It’s being used as the user profile storage for large scale ads serving products within Yahoo. 10+ billions of user profiles are being stored
Hidden backdoor API to root privileges in Apple OS X
TL;DR The Admin framework in Apple OS X contains a hidden backdoor API to root privileges. It’s been there for several years (at least since 2011), I found it in October 2014 and it can be exploited to escalate privileges to root from any user account in the system. The intention was probably to serve the “System Preferences” app and systemsetup (command-line tool), but any user process can use th
Introducing Vector
Vector is an open source host-level performance monitoring framework, which exposes hand-picked, high-resolution system and application metrics to every engineer’s browser. Having the right metrics available on demand and at a high resolution is key to understanding how a system behaves and correctly troubleshooting performance issues. Previously, we’d login to instances as needed, run a variety o
Launched - A Plist Generator
Name Prefixed with launched. Command Runs with sh -c You can run your command at a regular interval and/or a schedule defined with cron-style expressions like <number>,<number>,..., <start>-<end>, and */<interval>. * on empty fields is implied if any other cron field is set. Start interval Run at this interval (seconds)
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Designing Event-Driven Systems | Confluent
Paper: Large-scale cluster management at Google with Borg - High Scalability -