Re: [tlug] memcached / alternatives

[Curt Sampson <cjs@example.com>]

On 2013-01-21 13:31 +0900 (Mon), Kalin KOZHUHAROV wrote:

> Try `cat /dev/sda >/dev/zero`...

There are two things that many OSes do to avoid caching when they see
something like this happening:

1. Avoid caching reads made directly from a block device, and

2. Recognize sequential access patterns and either avoid caching those
data or mark it to be flushed earlier than data from non-sequential
reads. (This keeps large sequential reads from "blowing out" your
cache.)

cjs
-- 
Curt Sampson         <cjs@example.com>         +81 90 7737 2974

To iterate is human, to recurse divine.
    - L Peter Deutsch