Re: WebOjects Apache Adaptor for 16 Servers+
Re: WebOjects Apache Adaptor for 16 Servers+
- Subject: Re: WebOjects Apache Adaptor for 16 Servers+
- From: Chuck Hill <email@hidden>
- Date: Fri, 26 Aug 2011 10:16:24 -0700
On 2011-08-26, at 8:13 AM, Alexander Spohr wrote:
> Our setup:
>
> - Webservers know every appserver and ask each for running instances.
> - Each appserver has wotaskd running. wotaskd restarts and shedules apps on its machine (that's what it is for).
> - Monitor (on one machine) knows all wotaskd's and configures them.
>
> No files involved. (Just as backup)
> wotaskd's do not synchronize. They just know their own machine. (As far as I remember)
When changes are made in JavaMonitor, it sends messages to each wotaskd to update its local copy of the SiteConfig.xml file. Each machine will have the configuration for all machines. wotaskd reads this file to get the configuration. Each wotaskd only manages instances running on its own machine (it ignores the rest of the configuration).
Chuck
> Am 26.08.2011 um 16:16 schrieb Mertz Stéphan:
>
>> Hi,
>>
>> Le 26 août 2011 à 14:31, Alexander Spohr a écrit :
>>
>>> What is your problem?
>> It's rather a comprehension problem.
>> My first attempt was to install a monitor+wotaskd on the http server to manage the app servers: bad idea.
>> I did not know the mechanism of synchonisation between the wotaskds, I do not know if it is really reliable.
>>
>>>> Are you in the same conf ?
>>>
>>> _IN_ the same conf? Not sure I understand this question (but I am German and not a native speaker).
>>> We have one wotaskd per machine. All apps on one machine are configured with it.
>> I wanted to ask : do you have the same setup ? (not native speaker too)
>>
>>>> Do you share the siteConfig.xml for all the servers ?
>>> Yes. But we do not transfer the file. the web-server contacts alls wotaskd's.
>>> That is much better if one app(-server) goes offline.
>> So, each app server has it's own siteConfig.xml (auto-magically synchronized)? It is not in a shared folder ?
>>
>>>> Where are your monitor ?
>>> On one of the app-servers. Only running when we need it. Not in wotaskd's config but started by hand.
>>
>> Stéphan
>
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Chuck Hill Senior Consultant / VP Development
Practical WebObjects - for developers who want to increase their overall knowledge of WebObjects or who are trying to solve specific problems.
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