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Paxos Made Live &ndash An Engineering Perspective Tushar Chandra, Robert Griesemer, and Joshua Redstone Abstract We describe our experience building a fault-tolerant data-base using the Paxos consensus algorithm. Despite the existing literature in the field, building such a database proved to be non-trivial. We describe selected algorithmic and engineering problems encountered, and the solutions

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jemalloc is a general-purpose scalable concurrent malloc(3) implementation. There are several divergent versions of jemalloc in active use, including: FreeBSD's default system allocator (malloc.c, manual page). This was the first public use of jemalloc, and it is still author-maintained. NetBSD's default system allocator (jemalloc.c). Mozilla Firefox's allocator (source code), specifically for Mi

fmath.hpp provides a fast approximate exp(x) of float x. The function is is 2~6 times faster than std::expf() ofVC10 and 10~50 times faster than that of gcc 4.4 on Core2Duo. fmath.hpp is available on 32-bit/64-bit Visual Studio 2008/2010 and 32-bit/64-bit gcc 4.1 or later.

It's like JSON. but fast and small. MessagePack is an efficient binary serialization format. It lets you exchange data among multiple languages like JSON. But it's faster and smaller. Small integers are encoded into a single byte, and typical short strings require only one extra byte in addition to the strings themselves. Next: MessagePack is supported by over 50 programming languages and environm

Apache Hadoop is a software framework to build large-scale, shared storage and computing infrastructures. Hadoop clusters are used for a variety of research and development projects, and for a growing number of production processes at Yahoo!, EBay, Facebook, LinkedIn, Twitter, and other companies in the industry. It is a key component in several business critical endeavors representing a very sign

[ 2010-September-03 10:04 ] I have been testing one of Intel's "consumer" SSD (X25-M G2) to see if it stores data durably, meaning that if the disk claims the data has been written, it actually survives a power failure. This is important because you want your airline ticket to stay purchased after your buy it, even if the system crashes. The conclusion is that this SSD can lose data in power failu

Full MySQL + InnoDB, with 99.999% availability. Full data integrity. Instant failover across LAN and WAN. Unlimited read and write scaling. Download to your x86 servers.

Optimize your Software It is a simple step to speed up your software. No source code changes are required. Lockless MPI seemlessly replaces your system MPI implementation, and you reap the performance benefits. Lockless MPI Released Version 1.2 of the Lockless MPI has just been released. It is optimized for modern 64bit multicore systems, and supports programs running on Linux. There are bindings

Course information: This course is the first part in a two part sequence CS246/CS341 replacing CS345A. CS246 will discuss methods and algorithms for mining massive data sets, while CS341 (Advanced Topics in Data Mining) will be a project-focused advanced class. Instructor: Jure Leskovec Office Hours: TBD, Gates 418 Room: Mon,Wed 9:30-10:45 in 420-041 (Jordan Hall, room 041) Teaching assistants: Ad

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Nov 25, 2010 Google and Microsoft Cheat on Slow-Start. Should You? A Quest for Speed I decided a couple of weeks ago that I wanted to build an app, most likely a web app. Being a premature optimizer by nature, my first order of business (after deciding I need to learn to draw) was to find the absolute fastest way to serve up a web page. The Google home page is the fastest-loading page I know of,

Most of my readers will understand that cache is a fast but small type of memory that stores recently accessed memory locations.  This description is reasonably accurate, but the “boring” details of how processor caches work can help a lot when trying to understand program performance. In this blog post, I will use code samples to illustrate various aspects of how caches work, and what is the impa