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Date: Tue, 15 Nov 2011 15:09:03 +0000
From: Pid <pid@pidster.com>
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To: Tomcat Users List <users@tomcat.apache.org>
Subject: Re: mod_jk Avoid loadbalancing
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On 15/11/2011 15:00, Jeffrey Janner wrote:
> Alexander -
> From reading your emails, it sounds like you have the following setup
>=20
>                        F5 HW-balancer
>                              |
>                             / \
>                            /   \     Level 1 balancing
>                           /     \
>                        HTTPD1  HTTPD2
>                           |      |
>                      ----------------   Level 2 balancing
>                      |       |      |
>                     TC1     TC2    TC3
>=20
> Is that correct?
> You state that you want to eliminate Level 2.
> However, from a performance standpoint, why would you?  Without the Lev=
el 2 balancing, it is conceivable that one of the 3 Tomcats could end up =
processing the bulk the JSP requests.

Why?


p


> However, Pid is correct. If you are worried about performance, you coul=
d drop the HTTPD servers and balance directly to the Tomcat servers.  Tom=
cat is just as fast at delivering static content as HTTPD, and it simplif=
ies deployment.
>=20
> Jeff
>=20
>> -----Original Message-----
>> From: Alexander Diedler [mailto:adiedler@tecracer.de]
>> Sent: Tuesday, November 15, 2011 5:56 AM
>> To: Tomcat Users List; pid@pidster.com
>> Subject: AW: mod_jk Avoid loadbalancing
>>
>> Hello,
>> Yes, it was an option to solve my problem. But what about the
>> performance?
>> My opinion was to forward only necessary requests to the Tomcat (jsp,
>> java
>> etc) and let the Apache HTTPD deliver the static content (CSS,JS,Image=
s
>> etc).
>>
>> Best regards
>> Alexander
>>
>>
>>
>> -----Urspr=FCngliche Nachricht-----
>> Von: Pid [mailto:pid@pidster.com]
>> Gesendet: Dienstag, 15. November 2011 12:41
>> An: Tomcat Users List
>> Betreff: Re: mod_jk Avoid loadbalancing
>>
>> On 14/11/2011 10:42, Alexander Diedler wrote:
>>> Hello
>>>
>>>
>>>
>>> It is possible in a three node TC 6.0 / TC7.0 Cluster to avoid the
>>> loadbalancing between these three nodes? We only need the session
>>> replication. The Loadbalancing with failover will be done by a Big-IP=

>>> F5, so we don=B4t need a "double" balanced request, first time by the=

>>> HW-balancer and second time by the Apache mod_jk himself.
>>
>> So don't put httpd+mod_jk in front - just point the F5 at the Tomcats.=

>>
>>
>> p
>>
>>
>> --
>>
>> [key:62590808]
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