Re: [Vserver] Limiting a vserver's ressources

2005-07-02 Thread Roman Barczyński

Dnia 2005-07-01 19:18, Werner Schalk napisał:
I do run 15 vservers on a AMD Athlon(tm) XP 3000+ with 1gig of RAM. Last night 
I tried to backup my system remotely using rsync and the system load did 
temporarly go up to 60 (and higher). Consequently my system was not available 
for several hours. Therefore I would like to know how I can restrict the 
ressources a vserver is allowed to use (e.g. ram etc.).


You can limit each vserver-guest cpu usage
(sched_hard and/or sched_prio) by setting certain configuration:
http://linux-vserver.org/Scheduler+Parameters

regards
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RE: [Vserver] Limiting a vserver's ressources

2005-07-01 Thread Matthew Nuzum
 I tried to backup my system remotely using rsync and the system load did
 temporarly go up to 60 (and higher). Consequently my system was not
 available
 for several hours. Therefore I would like to know how I can restrict the
 ressources a vserver is allowed to use (e.g. ram etc.).

I know this doesn't answer your question; I don't use that feature myself. I
do use rsync for my backups, and what I've noticed is that the first time I
do a backup it uses a lot of system resources, especially I/O, which causes
a high server load. After that, rsync doesn't take too long and there's not
much additional load.

You may not need the limiting features unless you will be doing a full
backup every day, and if you are, don't use rsync.

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Re: [Vserver] Limiting a vserver's ressources

2005-07-01 Thread Werner Schalk
Hi,

 I know this doesn't answer your question; I don't use that feature myself.
 I do use rsync for my backups, and what I've noticed is that the first time
 I do a backup it uses a lot of system resources, especially I/O, which
 causes a high server load. After that, rsync doesn't take too long and
 there's not much additional load.
my rsync (4 million files) run did take very long and stopped the machine 
from responding.

 You may not need the limiting features unless you will be doing a full
 backup every day, and if you are, don't use rsync.

I now need to do a full backup as this is a new server. Obviously I will do 
incremental backups in the near future but not now :-)

Thanks.

Bye,
Werner.
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Re: [Vserver] Limiting a vserver's ressources

2005-07-01 Thread Oliver Welter

Hi Werner,

I now need to do a full backup as this is a new server. Obviously I will do 
incremental backups in the near future but not now :-)


When you issue the rsync command form the source machine you can try a 
nice so it will not eat all your cpu.


For other solutions dig the archives of the list - there are actually 
two approaches.


1: set the ulimit for the server to limit mem/cpu usage
2: use the vsched options (there was a thread on the list some weeks 
ago, http://list.linux-vserver.org/archive/vserver/msg09262.html or 
google for vsched )


Oliver
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