Yes, we have a cluster, but the patch I made to mod_jrun stops it from connecting to other instances of the cluster. This lets us do external loadbalancing, while still having session replication.
Russ > -----Original Message----- > From: AJ Mercer [mailto:[EMAIL PROTECTED] > Sent: Thursday, May 15, 2008 8:28 PM > To: CF-Talk > Subject: Re: load balancing / failover > > Just to clarify Russ, > > You still have a (JRun) cluster, > even though you are connecting directly to a CF instance? > > > On Fri, May 16, 2008 at 1:47 AM, Russ <[EMAIL PROTECTED]> wrote: > > > I can't speak for what is the best solution, but we've had fairly good > > experiences using my custom Apache connector that connects to only a > single > > cluster instance, and having 2 front end Apache servers (which are load > > balanced using a hardware load balancer) and 2 backend Apache/CF servers > > which are also load balanced using the same hardware load balancer. The > > image requests get served by the front end servers, and the CF requests > get > > forwarded to the backend servers through the load balancer. If an > instance > > is offline, it gets taken offline by the load balancer and requests are > no > > longer sent to it until it comes back up. > > > > I had to modify the Apache connector a bit to make this work. I > basically > > added a new config command which restricts which instances it's allowed > to > > connect to. > > > > Russ > > > > > -----Original Message----- > > > From: AJ Mercer [mailto:[EMAIL PROTECTED] > > > Sent: Wednesday, May 14, 2008 6:58 PM > > > To: CF-Talk > > > Subject: Re: load balancing / failover > > > > > > So if money was not object, what would be the perfect set up for a > > > ColdFusion Environment? > > > > > > > > > Do other vendor's provide a better J2EE server that has better > clustering > > > that JRun? > > > > > > When it comes to connecting to the JRun (CF) cluster, does IIS work > > > differently than Apache? > > > (for clustering) is one better than the other? > > > > > > > > > For what we have been experiencing (IIS [separate server] | CF702/JRun > 4 > > > updater 7 [2 servers, 2 instances each]; recently JVM1.5), > > > it seems to me that there is too much dependence between IIS and > > > individual > > > CF instances. > > > - at times, if one instance does off line, the whole site goes down. > > > - if an instance is off-line when IIS comes up, it is not added to > the > > > cluster when it comes back on-line > > > - IIS needs to be restarted if there is a change in the cluster > > > > > > Has any one noticed any improvements in clustering in CF8? > > > > > > Updater 7 for JRun was meant to have clustering fixes, but we have not > > > noticed it :-( > > > > > > On Thu, May 15, 2008 at 6:06 AM, Russ <[EMAIL PROTECTED]> wrote: > > > > > > > > > > > > > Russ, I think Rick already basically answered the question of why > he > > > > > isn't using something more advanced when he said "I don't have a > > setup > > > > > that warrants having multiple physical servers and a hardware load > > > > > balancer". Even LVS would not only require him to use Linux, but > > have > > > > > an additional physical server to control the load balancing. > > > > > > > > > Sorry I wasn't following the thread closely. Having two instances > on > > > the > > > > same server won't provide a huge amount of redundancy, but if he > wants > > > to > > > > run everything on the same server, there's again either a shared > > > hardware > > > > loadbalancer which can be had fairly cheap at a place like HMS, or > set > > > up > > > > LVS or something in VMWare on the same box. If he's already on > Linux, > > > he > > > > can probably even use the same box. > > > > > > > > I believe Apache also has some rudimentary load balancing built in, > but > > > it > > > > probably wouldn't work for this. > > > > > > > > Russ > > > > > > > > > > > > > > > > > > > > > > > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;192386516;25150098;k Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:305491 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
