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byRandom doesn't work with 2 servers

 

 

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lraynaud at Barneki

Apr 17, 2002, 6:31 PM

Post #1 of 2 (1094 views)
Permalink
byRandom doesn't work with 2 servers

Having seen no answer on this issue we can probably conclude that
this is so well known that nobody dare to answer ;-) or that it's a side
effect widly accepted without the need for solution?!

???

Lionel



Lionel Raynaud wrote:

> All,
>
> Following up on myself on the issue described in the email below:
>
> On the same config than below, byRandom appears to work fine on the
> default apache cgi directory, into which I dit set the backhand cgi test
> script.
>
> - I tried also to use a complete different directory than the default
> apache HTML directory: Still doesn't work.
>
> - I tried to use Files instead of Directory: Doesn't work
>
> - Manu other things: Doesn't work ;-)
>
> Any suggestion?
>
> Thx
>
> Lionel
>
>
>
> Lionel Raynaud wrote:
>
>>
>> We are actually building a two tiers solution using mod_backhand. In
>> implementing this solution we found a behavior that sounds not clearly
>> explainable (at least to us ;-). On the frontend servers the use of
>> the following simple configuration:
>>
>> <Directory "/usr/local/apache-1.3.24/htdocs">
>> #
>> # This may also be "None", "All", or any combination of "Indexes",
>> # "Includes", "FollowSymLinks", "ExecCGI", or "MultiViews".
>> #
>> # Note that "MultiViews" must be named *explicitly* --- "Options All"
>> # doesn't give it to you.
>> #
>> Options Indexes FollowSymLinks MultiViews
>> AllowOverride None
>> Backhand byAge
>> Backhand byRandom
>> </Directory>
>>
>> <IfModule mod_backhand.c>
>> ....
>> MulticastStats 192.168.1.255:4445
>> AcceptStats 192.168.1.0/24
>> ...
>>
>> </IfModule>
>>
>> Either the default apache page is displayed properly, either a HTTP
>> negative answer is received as:
>>
>> - "Not Acceptable"
>> An appropriate representation of the requested resource /index.html
>> could not be found on this server....
>>
>> - "Index of /"
>> ...
>>
>> Note that if the Apache "Option Indexes" is not allowed, the HTTP
>> negative answer is becoming "Forbiden (403) - You don't have
>> permission to access / on this server..."
>>
>> Interesting too:
>> - this behaviour is the same independently of the front-end servers
>> queried, two in our tests.
>> - This error does not appear as often IF we replace put byLoad instead
>> of byRandom.
>>
>> -----------------------------------------------------------------
>>
>> Here a quick description of our topology:
>>
>> Frontend: 192.168.1.0/24 - backhend: 192.168.2.0/24.
>>
>> After a proper installation of apache-1.3.24 + mod_backhand-1.2.1 on
>> multiple hosts (backend and/or frontend) (Solaris 8, 7, FreeBSD,
>> Linux) we validated quickly the solution simply by connecting a
>> browser to each apache servers on their <IP>:/backhand/. Outside of
>> the bug with 0/0 servers available,the multicasting of information is
>> working perfectly.
>>
>> Afterwards, we focused on the front-end servers only and make our
>> first test as described above. Just to clarify questions on this test,
>> this is exactly what has been done:
>>
>> - We stopped the backend servers - Useless at this point -
>> - Changed the front-end servers httpd.conf config to the one described
>> below onthe 2 front-end: 192.168.1.10 & 192.168.1.20
>> - Restarted the front-end
>> - Validated that <IP>:/backhand/ is displaying the correct 2 servers
>> - Use a browser on 192.168.1.101 on the same segment with No local
>> browsing cache (netscape 6.2).
>>
>> Thx
>>
>> Lionel
>>
>>
>> _______________________________________________
>> backhand-users mailing list
>> backhand-users [at] lists
>> http://lists.backhand.org/mailman/listinfo/backhand-users
>
>
>
>
> _______________________________________________
> backhand-users mailing list
> backhand-users [at] lists
> http://lists.backhand.org/mailman/listinfo/backhand-users


bondu at alphastate

Apr 17, 2002, 7:30 PM

Post #2 of 2 (1040 views)
Permalink
byRandom doesn't work with 2 servers [In reply to]

I was having a very similar problem.

Check the apache logs, if it is trying to access the file /index.html
instead of /path/to/www/index.html, than I was having the same problem.
Search the mail list archives for similar problems.

What was happening for me was apache was segfaulting every few requests. I
never came up with a good solution/workaround, and eventually resorted to
rebuilding the machine.




>
> Having seen no answer on this issue we can probably conclude that
> this is so well known that nobody dare to answer ;-) or that it's a
> side effect widly accepted without the need for solution?!
>
> ???
>
> Lionel
>
>
>
> Lionel Raynaud wrote:
>
>> All,
>>
>> Following up on myself on the issue described in the email below:
>>
>> On the same config than below, byRandom appears to work fine on the
>> default apache cgi directory, into which I dit set the backhand cgi
>> test script.
>>
>> - I tried also to use a complete different directory than the default
>> apache HTML directory: Still doesn't work.
>>
>> - I tried to use Files instead of Directory: Doesn't work
>>
>> - Manu other things: Doesn't work ;-)
>>
>> Any suggestion?
>>
>> Thx
>>
>> Lionel
>>
>>
>>
>> Lionel Raynaud wrote:
>>
>>>
>>> We are actually building a two tiers solution using mod_backhand. In
>>> implementing this solution we found a behavior that sounds not
>>> clearly explainable (at least to us ;-). On the frontend servers the
>>> use of the following simple configuration:
>>>
>>> <Directory "/usr/local/apache-1.3.24/htdocs">
>>> #
>>> # This may also be "None", "All", or any combination of "Indexes", #
>>> "Includes", "FollowSymLinks", "ExecCGI", or "MultiViews".
>>> #
>>> # Note that "MultiViews" must be named *explicitly* --- "Options All"
>>> # doesn't give it to you.
>>> #
>>> Options Indexes FollowSymLinks MultiViews
>>> AllowOverride None
>>> Backhand byAge
>>> Backhand byRandom
>>> </Directory>
>>>
>>> <IfModule mod_backhand.c>
>>> ....
>>> MulticastStats 192.168.1.255:4445
>>> AcceptStats 192.168.1.0/24
>>> ...
>>>
>>> </IfModule>
>>>
>>> Either the default apache page is displayed properly, either a HTTP
>>> negative answer is received as:
>>>
>>> - "Not Acceptable"
>>> An appropriate representation of the requested resource /index.html
>>> could not be found on this server....
>>>
>>> - "Index of /"
>>> ...
>>>
>>> Note that if the Apache "Option Indexes" is not allowed, the HTTP
>>> negative answer is becoming "Forbiden (403) - You don't have
>>> permission to access / on this server..."
>>>
>>> Interesting too:
>>> - this behaviour is the same independently of the front-end servers
>>> queried, two in our tests.
>>> - This error does not appear as often IF we replace put byLoad
>>> instead of byRandom.
>>>
>>> -----------------------------------------------------------------
>>>
>>> Here a quick description of our topology:
>>>
>>> Frontend: 192.168.1.0/24 - backhend: 192.168.2.0/24.
>>>
>>> After a proper installation of apache-1.3.24 + mod_backhand-1.2.1 on
>>> multiple hosts (backend and/or frontend) (Solaris 8, 7, FreeBSD,
>>> Linux) we validated quickly the solution simply by connecting a
>>> browser to each apache servers on their <IP>:/backhand/. Outside of
>>> the bug with 0/0 servers available,the multicasting of information is
>>> working perfectly.
>>>
>>> Afterwards, we focused on the front-end servers only and make our
>>> first test as described above. Just to clarify questions on this
>>> test, this is exactly what has been done:
>>>
>>> - We stopped the backend servers - Useless at this point -
>>> - Changed the front-end servers httpd.conf config to the one
>>> described below onthe 2 front-end: 192.168.1.10 & 192.168.1.20
>>> - Restarted the front-end
>>> - Validated that <IP>:/backhand/ is displaying the correct 2 servers
>>> - Use a browser on 192.168.1.101 on the same segment with No local
>>> browsing cache (netscape 6.2).
>>>
>>> Thx
>>>
>>> Lionel
>>>
>>>
>>> _______________________________________________
>>> backhand-users mailing list
>>> backhand-users [at] lists
>>> http://lists.backhand.org/mailman/listinfo/backhand-users
>>
>>
>>
>>
>> _______________________________________________
>> backhand-users mailing list
>> backhand-users [at] lists
>> http://lists.backhand.org/mailman/listinfo/backhand-users
>
>
>
> _______________________________________________
> backhand-users mailing list
> backhand-users [at] lists
> http://lists.backhand.org/mailman/listinfo/backhand-users

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