httpd-users mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Ch Praveena" <ps050...@gmail.com>
Subject Re: [users@httpd] Split-brain problem.
Date Tue, 08 Apr 2008 08:47:34 GMT
Thank you Oscar,

  As I am new to clustering Tomcat, Let me  know some information about
Heartbeat too..

And according to your information, Is that Server B a backup for Server A(So
that when A fails, B attain its responsibilites) or an equally performing
server with A.



2008/4/8 Oscar Haeger <oscar.haeger@sigma.se>:

> From my experience with clustering that is when the connection between
> parts of the clusters are lost and they can't agree on which one is supposed
> to keep serving the data. The most common way around it afaik is to have a
> priority and heartbeat between the nodes and allow them to kill each other
> off (something like STONITH = Shoot The Other Node In The Head) or similar.
>
> So, if we have two servers A and B and a heartbeat (with STONITH) between
> them and node A misses a few heartbeats (perhaps a lockup, perhaps something
> else), then node B will reset node A and take over that nodes capabilities.
>
> This is without reading about Terracotta so things might be different
> there, but that's the split-brain problem from my experience.
>
> Hope this helps
>
> Cheers
>
> Oscar
>
> ________________________________
>
> Från: Ch Praveena [mailto:ps050202@gmail.com]
> Skickat: ti 2008-04-08 09:30
> Till: users@httpd.apache.org
> Ämne: [users@httpd] Split-brain problem.
>
>
>
> Hi all,
>
>   While going on with Terracotta article,
> --
> http://www.terracotta.org/confluence/display/explore/How+Terracotta+Works,
> For implementing application server clustering, I found this phrase,
> "Split-brain problem."..
>
> Please let me know about this in detail..
>
>
>
> Regards,
>
> Praveena Chalamcharla,
> Securview....
>
> ---------------------------------------------------------------------
> The official User-To-User support forum of the Apache HTTP Server Project.
> See <URL:http://httpd.apache.org/userslist.html> for more info.
> To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
>   "   from the digest: users-digest-unsubscribe@httpd.apache.org
> For additional commands, e-mail: users-help@httpd.apache.org
>



-- 
Regards,

Praveena Chalamcharla,
Securview....

Mime
View raw message