Thanks for that information I will give it ago. Do you have an example of a listener which performs a flush. This is really what I am after, as there are a relatively small tables which need to be synched, others don't need to be. regards Malcolm Edgar
On Wed, Sep 23, 2009 at 11:51 PM, Andrus Adamchik <and...@objectstyle.org>wrote: > You are correct - flushing query cache groups across the cluster with > JGroups (or something else) is a low overhead way to propagate updates. My > usual setup is to have post-update/remove/persist listeners generate a > distributed event with a cache group appropriate for the object being saved. > This allows to define flush granularity at any level desired. > > I don't have JGroups config specifically restricted to localhost, however I > haven't seen any problems with network flooding with mine. Unless you also > have some security considerations, you can use something like that: > > > UDP(mcast_addr=231.12.21.132;mcast_port=45569;ip_ttl=4;tos=0;mcast_send_buf_size=150000;mcast_recv_buf_size=80000;bind_port=20000;port_range=500):PING(timeout=2000;num_initial_members=3):MERGE2(min_interval=5000;max_interval=10000):FD_SOCK:VERIFY_SUSPECT(timeout=1500):pbcast.NAKACK(gc_lag=50;retransmit_timeout=300,600,1200,2400,4800):UNICAST(timeout=300,600,1200,2400):pbcast.STABLE(desired_avg_gossip=20000):FRAG(frag_size=8096):pbcast.GMS(join_timeout=5000;shun=false;print_local_addr=true) > > Andrus > > > On Sep 23, 2009, at 4:34 PM, Malcolm Edgar wrote: > >> Hi All, >> I am looking to improve the performance of a set of web applications >> running. We have one application which is used mainly for >> adminsitration/configuration and a number of public facing web >> applications >> which can have a high load. >> >> I have been experimenting with OSCache but the problem I see is that the >> query cache and the object cache are not unified, so I sometimes have >> situations where the objects from the caches are not consistent. While >> the >> query cache can timeout, the object cache doesn't, so if another web >> application makes an update the object cache in this application is not >> updated. >> >> I presume the answer to this problem is using JGroups, if so does anyone >> have a configuration where its constrained to localhost. I don't really >> want >> to be broadcasting notification messages across the network. >> >> regards Malcolm Edgar >> > >
