Re: [vserver] vserver scalability

From: Eugen Leitl <eugen_at_leitl.org>
Date: Mon 07 Jun 2010 - 14:01:01 BST
Message-ID: <20100607130101.GH1964@leitl.org>

On Mon, Jun 07, 2010 at 11:29:56AM +0200, Juraj Pisarcik wrote:
> My highest number on 2x dualcore Opteron with 16GB RAM was approx. 50 servers.
> It was mostly webservers (Apache Tomcat, HTTPD, ...) and databases
> and some other stuff(Samba, ...). Problem was SHM, because I'm still
> running 32-bit kernel on this server. DB servers needs a lot of SHM
> and on 32-bit is upper limit max. 4GB SHM.

I'm running 253 uloaded vservers (nginx+postfix+ssh) on a 4 GByte
dual-core Atom server.

eryllium:~# vserver-stat
CTX PROC VSZ RSS userTIME sysTIME UPTIME NAME
2 10 328.7M 14.2M 14m31s17 10m37s84 8d04h45 v2
3 9 357.1M 14.1M 9m03s04 6m23s94 8d04h45 v3
4 9 307.6M 14.2M 8m12s62 5m59s13 8d04h45 v4
5 9 307.2M 14.2M 8m04s78 5m59s68 8d04h44 v5
6 9 378.6M 14.2M 10m30s55 7m56s51 8d04h44 v6
7 9 357.1M 14.2M 10m47s92 7m58s68 8d04h44 v7
...

252 9 357.1M 12.4M 4m40s68 3m37s14 8d04h45 v252
253 9 357.1M 12.4M 4m20s41 3m19s12 8d04h45 v253
254 9 356.6M 12.4M 5m43s40 3m47s88 8d04h45 v254

beryllium:~# w
 15:05:14 up 8 days, 4:48, 1 user, load average: 0.13, 0.14, 0.45
USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
root pts/0 helium.ativel.co 15:04 0.00s 0.05s 0.02s w

beryllium:~# cat /proc/meminfo
MemTotal: 4063316 kB
MemFree: 441340 kB
Buffers: 854120 kB
Cached: 319320 kB
SwapCached: 32860 kB
Active: 1192708 kB
Inactive: 1010560 kB
Active(anon): 575204 kB
Inactive(anon): 456456 kB
Active(file): 617504 kB
Inactive(file): 554104 kB
Unevictable: 0 kB
Mlocked: 0 kB
SwapTotal: 3229056 kB
SwapFree: 3082628 kB
Dirty: 216 kB
Writeback: 0 kB
AnonPages: 997936 kB
Mapped: 8792 kB
Slab: 1105764 kB
SReclaimable: 913432 kB
SUnreclaim: 192332 kB
PageTables: 191452 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 5260712 kB
Committed_AS: 4014436 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 281164 kB
VmallocChunk: 34359454079 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
DirectMap4k: 3584 kB
DirectMap2M: 4190208 kB

 
> Juraj
>
> On Thu, Jun 3, 2010 at 7:44 PM, JF Straeten <jfstraeten@scarlet.be> wrote:
> > Hi,
> >
> > On Thu, Jun 03, 2010 at 10:04:33AM -0700, Nirmal Guhan wrote:
> >
> >> Has anyone in this list done a scalability test on vserver ? Am
> >> particularly interested to know how many virtual servers can be
> >> spawned in a single host?
> >
> > I'm aware of this paper, related to OpenVZ :
> >
> > http://www.montanalinux.org/openvz-experiment.html
> >
> > It can only be better under VServer :-)
> >
> > Hih,
> >
> > --
> >
> > JFS.
> >

-- 
Eugen* Leitl leitl http://leitl.org
______________________________________________________________
ICBM: 48.07100, 11.36820 http://www.ativel.com http://postbiota.org
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Received on Tue Jun 8 02:29:38 2010
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