clustering Sling

[Xavi Beumala <xa...@gmail.com>]

Hi all,

I've been looking for information on how to cluster Sling and its underlying
Jackrabbit instance but I can't seem to find any doc.

I've found some references to clustering in the the Eventing page but no
specific details on how to set an environment up. What would the required
steps? should I cluster it through tomcat (or any other app server) or is it
supported by the standalone distro? would you have any handy link on these
regards?

Many thanks
Xavi

Re: clustering Sling

[Xavi Beumala <xa...@gmail.com>]

fantastic! this sounds like a lighter deployment... I'll go with this option
then

many thanks!
Xavi

On Thu, Oct 20, 2011 at 3:07 PM, Bertrand Delacretaz <bdelacretaz@apache.org
> wrote:

> On Thu, Oct 20, 2011 at 8:31 AM, Xavi Beumala <xa...@gmail.com>
> wrote:
> >... What I have in mind as for now is to use apache as webserver, deploy
> Sling
> > in Tomcat and connect them using ajp13 + modjk. Does this sound like a
> good
> > configuration to you? Would you have any further recomenation in these
> > regards? Would there be any way to connect apache to the standalone Sling
> > version? would it make any sense?...
>
> Absolutely, mod_proxy will do that nicely, and you can then run Sling
> simply using its runnable jar.
>
> -Bertrand
>

Re: clustering Sling

[Bertrand Delacretaz <bd...@apache.org>]

On Thu, Oct 20, 2011 at 8:31 AM, Xavi Beumala <xa...@gmail.com> wrote:
>... What I have in mind as for now is to use apache as webserver, deploy Sling
> in Tomcat and connect them using ajp13 + modjk. Does this sound like a good
> configuration to you? Would you have any further recomenation in these
> regards? Would there be any way to connect apache to the standalone Sling
> version? would it make any sense?...

Absolutely, mod_proxy will do that nicely, and you can then run Sling
simply using its runnable jar.

-Bertrand

Re: clustering Sling

[Xavi Beumala <xa...@gmail.com>]

Hi Justin,

That makes lot of sense now :-) I'll be using cookie based authentication
and session afinity.
What I have in mind as for now is to use apache as webserver, deploy Sling
in Tomcat and connect them using ajp13 + modjk. Does this sound like a good
configuration to you? Would you have any further recomenation in these
regards? Would there be any way to connect apache to the standalone Sling
version? would it make any sense?

many thanks
Xavi



On Wed, Oct 19, 2011 at 7:20 PM, Justin Edelson <ju...@justinedelson.com>wrote:

> Tomcat clustering provides no value for Sling unless you are using
> Sessions. Session affinity (which is really a property of the web
> server / load balancer than the app server) may provide value in
> certain scenarios, but this isn't dependent upon using session
> clustering at the app server.
>
> Sling's authentication system is pluggable, so there's no single
> answer for "what about user authentication." The form authentication
> handler can be configured to use a session store, but uses a
> non-session by default. Because of the way the form authentication
> handler works, you really have to use session affinity with it.
>
> In general, I would generally say that if your aim is HA, you want to
> design your application to be as stateless as possible.
>
> Justin
>
> On Wed, Oct 19, 2011 at 1:05 PM, Xavi Beumala <xa...@gmail.com>
> wrote:
> > Hi Justin,
> >
> > The main goal here is to achieve high availability in case a node goes
> down
> > for any random reason. Would tomcat clustering be the recomended solution
> > here?
> >
> > In regards to the use of Sessions, what about user authentication? How is
> > this information handled in Sling? is there anything to bear in mind when
> > clustering?
> >
> > Cheers
> > Xavi
> >
> >
> >
> > On Wed, Oct 19, 2011 at 2:58 PM, Justin Edelson <
> justin@justinedelson.com>wrote:
> >
> >> Typically, clustering the repository is all you need. Most Sling
> >> application do not use Sessions, but if you do you would need to
> >> cluster Tomcat.
> >>
> >> What specifically are you trying to accomplish?
> >>
> >> Justin
> >>
> >> On Wed, Oct 19, 2011 at 3:24 AM, Xavi Beumala <xa...@gmail.com>
> >> wrote:
> >> > Hi Justin,
> >> >
> >> > Thanks for the link, I found it yesterday too and there's lot of info
> >> there.
> >> > I was more interested on clustering Sling though. In my case I'll be
> >> using
> >> > Tomcat, should I cluster tomcat and simply deploy sling as an app on
> it
> >> > configuring Jackrabbit as mentioned in the link below?
> >> >
> >> > many thanks
> >> > Xavi
> >> >
> >> >
> >> >
> >> > On Tue, Oct 18, 2011 at 10:22 PM, Justin Edelson
> >> > <ju...@justinedelson.com>wrote:
> >> >
> >> >> Xavi-
> >> >> Take a look at the Jackrabbit Clustering documentation:
> >> >> http://wiki.apache.org/jackrabbit/Clustering
> >> >>
> >> >> Regards,
> >> >> Justin
> >> >>
> >> >> On Tue, Oct 18, 2011 at 4:17 PM, Xavi Beumala <
> xavi.beumala@gmail.com>
> >> >> wrote:
> >> >> > Hi all,
> >> >> >
> >> >> > I've been looking for information on how to cluster Sling and its
> >> >> underlying
> >> >> > Jackrabbit instance but I can't seem to find any doc.
> >> >> >
> >> >> > I've found some references to clustering in the the Eventing page
> but
> >> no
> >> >> > specific details on how to set an environment up. What would the
> >> required
> >> >> > steps? should I cluster it through tomcat (or any other app server)
> or
> >> is
> >> >> it
> >> >> > supported by the standalone distro? would you have any handy link
> on
> >> >> these
> >> >> > regards?
> >> >> >
> >> >> > Many thanks
> >> >> > Xavi
> >> >> >
> >> >>
> >> >
> >>
> >
>

Re: clustering Sling

[Justin Edelson <ju...@justinedelson.com>]

Tomcat clustering provides no value for Sling unless you are using
Sessions. Session affinity (which is really a property of the web
server / load balancer than the app server) may provide value in
certain scenarios, but this isn't dependent upon using session
clustering at the app server.

Sling's authentication system is pluggable, so there's no single
answer for "what about user authentication." The form authentication
handler can be configured to use a session store, but uses a
non-session by default. Because of the way the form authentication
handler works, you really have to use session affinity with it.

In general, I would generally say that if your aim is HA, you want to
design your application to be as stateless as possible.

Justin

On Wed, Oct 19, 2011 at 1:05 PM, Xavi Beumala <xa...@gmail.com> wrote:
> Hi Justin,
>
> The main goal here is to achieve high availability in case a node goes down
> for any random reason. Would tomcat clustering be the recomended solution
> here?
>
> In regards to the use of Sessions, what about user authentication? How is
> this information handled in Sling? is there anything to bear in mind when
> clustering?
>
> Cheers
> Xavi
>
>
>
> On Wed, Oct 19, 2011 at 2:58 PM, Justin Edelson <ju...@justinedelson.com>wrote:
>
>> Typically, clustering the repository is all you need. Most Sling
>> application do not use Sessions, but if you do you would need to
>> cluster Tomcat.
>>
>> What specifically are you trying to accomplish?
>>
>> Justin
>>
>> On Wed, Oct 19, 2011 at 3:24 AM, Xavi Beumala <xa...@gmail.com>
>> wrote:
>> > Hi Justin,
>> >
>> > Thanks for the link, I found it yesterday too and there's lot of info
>> there.
>> > I was more interested on clustering Sling though. In my case I'll be
>> using
>> > Tomcat, should I cluster tomcat and simply deploy sling as an app on it
>> > configuring Jackrabbit as mentioned in the link below?
>> >
>> > many thanks
>> > Xavi
>> >
>> >
>> >
>> > On Tue, Oct 18, 2011 at 10:22 PM, Justin Edelson
>> > <ju...@justinedelson.com>wrote:
>> >
>> >> Xavi-
>> >> Take a look at the Jackrabbit Clustering documentation:
>> >> http://wiki.apache.org/jackrabbit/Clustering
>> >>
>> >> Regards,
>> >> Justin
>> >>
>> >> On Tue, Oct 18, 2011 at 4:17 PM, Xavi Beumala <xa...@gmail.com>
>> >> wrote:
>> >> > Hi all,
>> >> >
>> >> > I've been looking for information on how to cluster Sling and its
>> >> underlying
>> >> > Jackrabbit instance but I can't seem to find any doc.
>> >> >
>> >> > I've found some references to clustering in the the Eventing page but
>> no
>> >> > specific details on how to set an environment up. What would the
>> required
>> >> > steps? should I cluster it through tomcat (or any other app server) or
>> is
>> >> it
>> >> > supported by the standalone distro? would you have any handy link on
>> >> these
>> >> > regards?
>> >> >
>> >> > Many thanks
>> >> > Xavi
>> >> >
>> >>
>> >
>>
>

Re: clustering Sling

[Xavi Beumala <xa...@gmail.com>]

Hi Justin,

The main goal here is to achieve high availability in case a node goes down
for any random reason. Would tomcat clustering be the recomended solution
here?

In regards to the use of Sessions, what about user authentication? How is
this information handled in Sling? is there anything to bear in mind when
clustering?

Cheers
Xavi



On Wed, Oct 19, 2011 at 2:58 PM, Justin Edelson <ju...@justinedelson.com>wrote:

> Typically, clustering the repository is all you need. Most Sling
> application do not use Sessions, but if you do you would need to
> cluster Tomcat.
>
> What specifically are you trying to accomplish?
>
> Justin
>
> On Wed, Oct 19, 2011 at 3:24 AM, Xavi Beumala <xa...@gmail.com>
> wrote:
> > Hi Justin,
> >
> > Thanks for the link, I found it yesterday too and there's lot of info
> there.
> > I was more interested on clustering Sling though. In my case I'll be
> using
> > Tomcat, should I cluster tomcat and simply deploy sling as an app on it
> > configuring Jackrabbit as mentioned in the link below?
> >
> > many thanks
> > Xavi
> >
> >
> >
> > On Tue, Oct 18, 2011 at 10:22 PM, Justin Edelson
> > <ju...@justinedelson.com>wrote:
> >
> >> Xavi-
> >> Take a look at the Jackrabbit Clustering documentation:
> >> http://wiki.apache.org/jackrabbit/Clustering
> >>
> >> Regards,
> >> Justin
> >>
> >> On Tue, Oct 18, 2011 at 4:17 PM, Xavi Beumala <xa...@gmail.com>
> >> wrote:
> >> > Hi all,
> >> >
> >> > I've been looking for information on how to cluster Sling and its
> >> underlying
> >> > Jackrabbit instance but I can't seem to find any doc.
> >> >
> >> > I've found some references to clustering in the the Eventing page but
> no
> >> > specific details on how to set an environment up. What would the
> required
> >> > steps? should I cluster it through tomcat (or any other app server) or
> is
> >> it
> >> > supported by the standalone distro? would you have any handy link on
> >> these
> >> > regards?
> >> >
> >> > Many thanks
> >> > Xavi
> >> >
> >>
> >
>

Re: clustering Sling

[Justin Edelson <ju...@justinedelson.com>]

Typically, clustering the repository is all you need. Most Sling
application do not use Sessions, but if you do you would need to
cluster Tomcat.

What specifically are you trying to accomplish?

Justin

On Wed, Oct 19, 2011 at 3:24 AM, Xavi Beumala <xa...@gmail.com> wrote:
> Hi Justin,
>
> Thanks for the link, I found it yesterday too and there's lot of info there.
> I was more interested on clustering Sling though. In my case I'll be using
> Tomcat, should I cluster tomcat and simply deploy sling as an app on it
> configuring Jackrabbit as mentioned in the link below?
>
> many thanks
> Xavi
>
>
>
> On Tue, Oct 18, 2011 at 10:22 PM, Justin Edelson
> <ju...@justinedelson.com>wrote:
>
>> Xavi-
>> Take a look at the Jackrabbit Clustering documentation:
>> http://wiki.apache.org/jackrabbit/Clustering
>>
>> Regards,
>> Justin
>>
>> On Tue, Oct 18, 2011 at 4:17 PM, Xavi Beumala <xa...@gmail.com>
>> wrote:
>> > Hi all,
>> >
>> > I've been looking for information on how to cluster Sling and its
>> underlying
>> > Jackrabbit instance but I can't seem to find any doc.
>> >
>> > I've found some references to clustering in the the Eventing page but no
>> > specific details on how to set an environment up. What would the required
>> > steps? should I cluster it through tomcat (or any other app server) or is
>> it
>> > supported by the standalone distro? would you have any handy link on
>> these
>> > regards?
>> >
>> > Many thanks
>> > Xavi
>> >
>>
>

Re: clustering Sling

[Xavi Beumala <xa...@gmail.com>]

Hi Justin,

Thanks for the link, I found it yesterday too and there's lot of info there.
I was more interested on clustering Sling though. In my case I'll be using
Tomcat, should I cluster tomcat and simply deploy sling as an app on it
configuring Jackrabbit as mentioned in the link below?

many thanks
Xavi



On Tue, Oct 18, 2011 at 10:22 PM, Justin Edelson
<ju...@justinedelson.com>wrote:

> Xavi-
> Take a look at the Jackrabbit Clustering documentation:
> http://wiki.apache.org/jackrabbit/Clustering
>
> Regards,
> Justin
>
> On Tue, Oct 18, 2011 at 4:17 PM, Xavi Beumala <xa...@gmail.com>
> wrote:
> > Hi all,
> >
> > I've been looking for information on how to cluster Sling and its
> underlying
> > Jackrabbit instance but I can't seem to find any doc.
> >
> > I've found some references to clustering in the the Eventing page but no
> > specific details on how to set an environment up. What would the required
> > steps? should I cluster it through tomcat (or any other app server) or is
> it
> > supported by the standalone distro? would you have any handy link on
> these
> > regards?
> >
> > Many thanks
> > Xavi
> >
>

Re: clustering Sling

[Justin Edelson <ju...@justinedelson.com>]

Xavi-
Take a look at the Jackrabbit Clustering documentation:
http://wiki.apache.org/jackrabbit/Clustering

Regards,
Justin

On Tue, Oct 18, 2011 at 4:17 PM, Xavi Beumala <xa...@gmail.com> wrote:
> Hi all,
>
> I've been looking for information on how to cluster Sling and its underlying
> Jackrabbit instance but I can't seem to find any doc.
>
> I've found some references to clustering in the the Eventing page but no
> specific details on how to set an environment up. What would the required
> steps? should I cluster it through tomcat (or any other app server) or is it
> supported by the standalone distro? would you have any handy link on these
> regards?
>
> Many thanks
> Xavi
>