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get requests with keys which start with a prefix __mcrouter__ cause mcrouter to return special values and are not forwarded downstream. To illustrate some of these commands we'll use the following ...
Version 36 release notes: f473934 fixes a security issue. Updating to a version that includes that fix (i.e. version 36 or greater) is highly recommended. New option in MissFailoverRoute allows returning ...
Every time a new cache box is added to Memcache infrastructure, it has empty cache. This box is called 'cold'. Every request to this box will end up in 'miss', so clients will spend lots ...
The complete list of available options can be obtained with mcrouter --help. Each option has a "command line name" and an "internal name". The internal name is used in [[mcrouter.options ...
What is a mcrouter config file? Mcrouter config files specify where and how mcrouter should route requests. A mcrouter config is JSON with some extensions: C++-style comments are allowed (both /* */ and ...
Mcrouter returns different errors on different scenarios. This article's goal is to help you understand the ways mcrouter handle errors. Errors types Mcrouter has basically two main categories of errors: ...
ASCII protocol Mcrouter implements the standard memcached ASCII protocol. Connection pooling Mcrouter will only open one TCP connection to a given destination per mcrouter thread, and any requests sent ...
A flavor refers to a specific mcrouter configuration. Flavor configs specify command line arguments for running mcrouter. They configure which config file to use, and various other startup parameters. ...
Welcome to mcrouter Mcrouter is a memcached protocol router for scaling memcached deployments. It's a core component of cache infrastructure at Facebook and Instagram where mcrouter handles almost ...