Anything can cause a netsplit. Anything that makes the 2 sets of servers lose connection to each other will cause a netsplit. Dead router, cut wire, power outage, configuration changes, any number of things.
What I don't understand is, if there's a netsplit, the servers on the other side should be "unreachable" to the load balancer, and thus should not have any more requests directed to them until they become reachable again. -wes On 4/8/08, Ch Praveena <[EMAIL PROTECTED]> wrote: > > Thankyou Marcus, > But let me know the reasons for the occurence of the Netsplit, which lead > Split brain problem. > > > > > 2008/4/8 Marcus Franke <[EMAIL PROTECTED]>: > > > > On Tue, Apr 08, 2008 at 01:00:54PM +0530, Ch Praveena wrote: > > > 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.. > > > > > > > Easy, > > > > if you have a cluster of 4 nodes, and you have a netsplit, you'll end > with > > two clusters with two nodes. Split brain problem is that both parts are > > equal in size, so how can the software decide, which side is the correct > > one and which nodes shall drop dead and restart? > > > > Because of this you may want an uneven number of nodes in your cluster. > > This > > way you cannot have a split'ed cluster with equal numbers of nodes on > each > > side. > > > > > > > > regards, > > Marcus > > > > --------------------------------------------------------------------- > > To start a new topic, e-mail: users@tomcat.apache.org > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > > > > -- > Regards, > > Praveena Chalamcharla, > Securview.... >
