To: Simon Horman <horms@xxxxxxxxxxxx>
Subject: RE: [Linux-HA] UDP / DHCP / LDIRECTORD
Cc: "linux-ha@xxxxxxxxxxxxxxxxxx" <linux-ha@xxxxxxxxxxxxxxxxxx>, lvs-devel <lvs-devel@xxxxxxxxxxxxxxx>, Julian Anastasov <ja@xxxxxx>
From: Brian Carpio <bcarpio@xxxxxxxxxxxx>
Date: Thu, 15 Apr 2010 12:57:29 -0700

Thanks again for all of your hard work, I have sent over a million UDP DHCP 
packets at the new kernel/ipvsadm with the patches applied and currently the 
only issue (which you know about already) is that ldirectord doesn't know about 
the -o option which causes a slight issue with heartbeat (but I just put in a 
cheap fix in my ldirectord start script to edit the services created by 

So not only have I sent over 1,000,000 packets to this setup but I have also 
sent them as fast as 10 packets every 3 milliseconds, I plan to do a long term 
week long test but I don't foresee any issues.. 

Let me know if there is any other testing you would like us to do.. or if you 
would like me to send out the kernel-2.6.18-128 with the patch and the 
ipvsadm-1.24-10 rpm with the patch.. 

Thanks again Simon you are the man!!

Brian Carpio

-----Original Message-----
From: Simon Horman [mailto:horms@xxxxxxxxxxxx] 
Sent: Monday, April 12, 2010 8:56 PM
To: Brian Carpio
Cc: linux-ha@xxxxxxxxxxxxxxxxxx; lvs-devel; Julian Anastasov
Subject: Re: [Linux-HA] UDP / DHCP / LDIRECTORD

Hi Brian,

here are some patches to test.
I have only lightly tested them to the extent that they compile and appear to 
configure a valid service.

You can enable one packet scheduling (OPS) by passing the -o option to ipvsadm 
when creating a virtual service.


        # ipvsadm -A -u -o
        # ipvsadm -L -n
        IP Virtual Server version 1.2.1 (size=4096)
        Prot LocalAddress:Port Scheduler Flags
          -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
        UDP wlc ops

There are three patches:

ops-kernel-2.6.18-128.el5.patch: Patch against CentOS-5.3's 2.6.18-128 kernel.
ops-ipvsadm-1.24-10: Patch against CentOS-5.3's ipvsadm 1.24-10.
ops-ipvsadm-1.24: Patch against upstream ipvsadm 1.24

I have not up-ported the code to the 2.6.33 kernel and ipvsadm 1.25 yet.

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