[Lxc-users] limiting RAM usage and disk space usage

[Gordon Henderson]

On Thu, 2 Dec 2010, Serge E. Hallyn wrote:

> Quoting Gordon Henderson (gordon at drogon.net):
>> On Mon, 29 Nov 2010, Trent W. Buck wrote:
>>
>>> Siju George <sgeorge.ml at gmail.com> writes:
>>>
>>>> 1) how do I limit the RAM usage of a container?
>>>
>>> In lxc.conf(5):
>>>
>>>    lxc.cgroup.memory.limit_in_bytes = 256M
>>>    lxc.cgroup.memory.memsw.limit_in_bytes = 1G
>>>
>>>> 2) how do I limit the disk usage of a container ?
>>>
>>> Ensure the rootfs is a dedicated filesystem (e.g. an LVM LV), and limit
>>> its size accordingly.
>>
>> Finally, a use for LVM....
>>
>> And here was me about to embark on using filesystems in files loopback
>> mounted...
>
> That should also work, just a bit slower, right?

I don't know, really. I use loopback mounted filesystems for other things 
and I don't really notice much slowdowns compared to the native 
filesystem, but I've never benchmarked it.

It is some years since I looked at LVM and I wasn't impressed then so 
stopped thinking about it and used something else (I was looking at 
snapshot abilities at the time) I build systems for a purpose so rarely 
have the need to do the only thing LVM might be handy for - ie. resizing a 
volume so it just doesn't fgure in my systems, but maybe this is a valid 
use now.

Gordon