dejanmm at fastmail
Mar 13, 2008, 10:13 AM
Post #3 of 4
(353 views)
Permalink
|
Hi,
On Thu, Mar 13, 2008 at 03:54:14PM +0100, Florian Tischler wrote:
> Hi,
>
> I am currently working on a 2 node Xen cluster. In normal operation both nodes
> should host half of the Xen DomUs, if one node goes down all Xen DomUs are
> hosted on remaining node. So i need mem_management which is already
> implemented and working in Linux-HA 2.1.3.
>
> I was not really satisfied with the mem_management of the Xen OCF as every
> DomU gets the same amount of memory. (As example my memory eating groupware
> server gets the same amount of memory as my small subversion server)
>
> I have tried to extend the Xen OCF of Linux-HA 2.1.3 to use some kind
> of "memory weighting" and I think I found a well working solution.
>
> I have attached my "Xen with memweighting OCF" to this email. Maybe someone
> wants to try it. I have tested it a few days with 3 DomUs, it seems to work
> without problems.
>
> As i have just started using Linux-HA i would be glad to get some feedback
> from Linux-HA experts if the way i have extended the OCF is save, if I could
> make things better, point me on possible problems.
>
> The OCF used 2 additional keys. use_mem_weighting true or false. (With false
> it works like the standard Xen OCF) and memweightfile full path to a file
> where the memory weighting is configured. In this memweightfile I specify
> xen-machine = memweightingvalue line per line. The allowed range for this
> value is 1 - 10. If no line is found 1 is assumed. So as example with 2 lines
> in this memweightfile (groupware = 10 and subversion = 1) the groupware DomU
> gets 10x the amount of memory like the svn DomU.
>
> I would be glad to get some feedback.
IMO, it could be implemented without the external file. Just
define one extra attribute, say mem_weight which defaults to some
value, say 5. Memory weight would be applied always (i.e. no
enable/disable), but it would make difference only if the
mem_weight attributes are set.
Please use patches instead of complete files.
And many thanks for the contribution!
Cheers,
Dejan
> Florian
>
> --
> Florian Tischler
> mailto:flo_list2008 [at] floti
> icq:11754147
> _______________________________________________
> Linux-HA mailing list
> Linux-HA [at] lists
> http://lists.linux-ha.org/mailman/listinfo/linux-ha
> See also: http://linux-ha.org/ReportingProblems
_______________________________________________
Linux-HA mailing list
Linux-HA [at] lists
http://lists.linux-ha.org/mailman/listinfo/linux-ha
See also: http://linux-ha.org/ReportingProblems
|
XenWithMemWeighting.gz
