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Operating Systems Linux Linux Kernel Config Scopes within VM or Hypervisor Post 303030901 by freedombird9 on Tuesday 19th of February 2019 01:35:40 AM
Old 02-19-2019
Linux Kernel Config Scopes within VM or Hypervisor

In production we're going to deploy a redis server and need to set the overcommit_memory and disable Transparent Huge Pages in Kernel.

The issue is currently we only have one giant server, and it is to be shared by many other apps. We only want those kernel configs in the redis server. I wonder if we can achieve it by spinning up a dedicated VM for redis. Doing so in docker certainly doesn't make sense. My questions are:
  • Will those Kernel configs take actual effect in the redis VM even if the host OS doesn't have the same configs? I doubt it since the hardware resource is allocated by the host machine in the end.
  • Will the kernel config in the redis VM affect other VMs that run other apps? I think it won't, just want to confirm.
  • To achieve the goal, what kind of VM or hypervisor should we use?

If there's no way to do it in VM, is having a separate server (hardware) for redis the only way to go?

Last edited by RavinderSingh13; 02-19-2019 at 06:47 AM..
 

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set_allegro_resource_path(3alleg4)				  Allegro manual				set_allegro_resource_path(3alleg4)

NAME
set_allegro_resource_path - Sets a specific resource search path. Allegro game programming library. SYNOPSIS
#include <allegro.h> int set_allegro_resource_path(int priority, const char *path); DESCRIPTION
Sometimes Allegro doesn't look in enough places to find a resource. For those special cases, you can call this function before loading your resource with additional paths to search for. You set up the priorities, higher numbers are searched for first. To modify an already setup path, call this function with the same priority and the new path. To remove an already setup path, call this function with the priority of the path and NULL as the path parameter. Example: set_allegro_resource_path(10, "my_game/configs"); set_allegro_resource_path(0, "users/configs/"); set_allegro_resource_path(-45, "temp"); These custom paths will be valid until you call allegro_exit(). You can call this function before install_allegro(), but after set_ufor- mat() if you want to use a text encoding format other than the default. RETURN VALUE
Returns non-zero on success, zero if the path could not be added or you wanted to remove a path and the priority used didn't have any asso- ciated path. Modification of existing paths always succeeds. SEE ALSO
find_allegro_resource(3alleg4) Allegro version 4.4.2 set_allegro_resource_path(3alleg4)
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