how to speed up mock

[Paul Howarth]

On 06/14/2012 03:26 PM, Farkas Levente wrote:
> On 05/30/2012 10:48 AM, Paul Howarth wrote:
>> Are you using the tmpfs plugin? That improves things significantly if
>> you can spare the RAM. Here's the mock config options I use:
>>
>> config_opts['plugin_conf']['tmpfs_enable'] = True
>> config_opts['plugin_conf']['tmpfs_opts']['required_ram_mb'] = 4096
>> config_opts['plugin_conf']['tmpfs_opts']['max_fs_size'] = '2048m'
>
> could you or someone explain me what does the:
> - required_ram_mb

The build machine must have at least that much RAM to use the tmpfs plugin.

> - max_fs_size

Limit for the size of the filesystem used for that instance's chroot. So 
if your buildroot for a given package exceeds that size, the build will 
fail. The default is half the system RAM I believe.

> means?
>
> and what these value mean if i run two mock build with different
> configuration file? ie the above values are mock global or mock instant
> local values?

If you have configurations with different 'required_ram_mb' values, one 
of those will run on a host with less memory than the other.

If you have multiple mock instances running together, each one would 
have its own tmpfs instance and you could end up using as much RAM as 
the sum of the 'max_fs_size' value for each concurrently-running instance.

That's my understanding anyway.

Paul.