[CentOS-mirror] rsync lock files

Fri Mar 8 19:39:49 UTC 2019
Dattatec Mirrors <mirrors at dattatec.com>

El Viernes 08/03/2019 a las 16:09, David Richardson escribió:
> I'm quoted! I'm famous! :)

With reason, your flock advise was thoroughly implemented in our 
infrastructure :)

And lately I (almost accidentally) realised the good effects of lowering 
vm.vfs_cache_pressure, reinforced after re-reading your email :)

> There's two parts to what was quoted below:
> 1) Use flock to make sure you only have one update running. It'll do the
>     right thing if something happens and the job exits abnormally. Someone
>     else has already written a tool, so use their work instead of
>     reinventing it yourself.
> 2) Tune vm.vfs_cache_pressure. In my experience, this makes the operations
>     where you care about interactive performance (ls, du, find, rsync
>     updates from upstream) MUCH faster, and has little impact on
>     bulk-transfer performance.
> Thanks,
> DR

Ricardo J. Barberis
Senior SysAdmin / IT Architect
La Actitud Es Todo