Memcached canonical keys
Usually, memcached keys are generated by a front-end DEVIL and are directly associated with a system element (e.g. QUATB004). These keys – referred as canonical keys – take the same name of the element with two extensions "_STA" and "_DYN" (for the the static and dynamic datasets).
Memcached free keys
When a memcached key does not refer to the "_STA" or "_DYN"dataset of a system element, it takes a name of 8 characters followed by a 3 characters extension separated by a "_". Both the name and the extension are arbitrary even though It's advisable use conventional extensions:
| Extension | Description |
|---|---|
| _BUF | data buffers (FIFOs , circular, etc...) |
| _DAT | generic data structures |
| _EXT | extra data associated to a _STA or _DYN dataset |
Memcached traffic monitoring
As root user root on the memcached server (192.168.192.107)
> iftop -i eth0 -B