12:07 p.m.
Looking for some best practices advice on configuring clustering with the following
setup:
JBC 3
Hibernate 3.3.1
hib-jbc2 integration
4 Cache instances: entityCache, collectionCache, queryCache, timestampsCache
queryCache is LOCAL, three others are INVALIDATION_ASYNC
all cluster nodes in the same subnet
My main question is this: should I configure a distinct JGroups Channel for each cache
instance or have all 3 instances share the same one?
I've read that, on one hand, Channels are heavyweight (use multiple threads) which
would argue for latter approach. However with a single channel configured as shown below I
do see cross-talking between the 3 caches of the same cluster:
anonymous wrote : [2/27/09 16:25:45:084] WARN org.jgroups.protocols.UDP
- discarded message from different group "dgEntityCacheCluster" (our
group is "dgCollectionCacheCluster"). Sender was 172.17.50.103:62010
| [2/27/09 16:25:45:613] WARN org.jgroups.protocols.UDP -
discarded message from different group "dgTimestampsCacheCluster" (our group is
"dgEntityCacheCluster"). Sender was 172.17.50.103:62012
| [2/27/09 16:25:45:613] WARN org.jgroups.protocols.UDP -
discarded message from different group "dgTimestampsCacheCluster" (our group is
"dgCollectionCacheCluster"). Sender was 172.17.50.103:62012
|
Here's my cache config:
anonymous wrote :
| <bean id="jbcRuntimeConfig"
class="org.jboss.cache.config.RuntimeConfig"
depends-on="transactionManager">
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| <bean id="baseCacheConfig"
class="org.jboss.cache.config.Configuration" abstract="true"
depends-on="jbcRuntimeConfig">
| <!-- TODO: same cluster for all caches or one per cache? -->
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and jgroups config:
anonymous wrote :
| <!--
| Default stack using IP multicasting. It is similar to the "udp"
| stack in stacks.xml, but doesn't use streaming state transfer and flushing
| author: Bela Ban
| version: $Id: udp.xml,v 1.29 2008/09/26 15:59:33 belaban Exp $
| -->
| <!-- mcast_addr="${jgroups.udp.mcast_addr:232.10.10.10}" -->
|
| <UDP
| mcast_addr="${jgroups.udp.mcast_addr:232.10.10.10}"
| mcast_port="${jgroups.udp.mcast_port:45588}"
| tos="8"
| ucast_recv_buf_size="20000000"
| ucast_send_buf_size="640000"
| mcast_recv_buf_size="25000000"
| mcast_send_buf_size="640000"
| loopback="false"
| discard_incompatible_packets="true"
| max_bundle_size="64000"
| max_bundle_timeout="30"
| ip_ttl="${jgroups.udp.ip_ttl:2}"
| enable_bundling="true"
| enable_diagnostics="true"
| thread_naming_pattern="cl"
|
| thread_pool.enabled="true"
| thread_pool.min_threads="2"
| thread_pool.max_threads="8"
| thread_pool.keep_alive_time="5000"
| thread_pool.queue_enabled="true"
| thread_pool.queue_max_size="10000"
| thread_pool.rejection_policy="discard"
|
| oob_thread_pool.enabled="true"
| oob_thread_pool.min_threads="1"
| oob_thread_pool.max_threads="8"
| oob_thread_pool.keep_alive_time="5000"
| oob_thread_pool.queue_enabled="false"
| oob_thread_pool.queue_max_size="100"
| oob_thread_pool.rejection_policy="Run"/>
|
| <PING timeout="2000"
| num_initial_members="3"/>
| <MERGE2 max_interval="30000"
| min_interval="10000"/>
| <FD_SOCK/>
| <FD_ALL/>
| <VERIFY_SUSPECT timeout="1500" />
|
| <pbcast.NAKACK use_stats_for_retransmission="false"
| exponential_backoff="150"
| use_mcast_xmit="true" gc_lag="0"
| retransmit_timeout="50,300,600,1200"
| discard_delivered_msgs="true"/>
|
| <pbcast.STABLE stability_delay="1000"
desired_avg_gossip="50000"
| max_bytes="1000000"/>
| <VIEW_SYNC avg_send_interval="60000" />
| <pbcast.GMS print_local_addr="true" join_timeout="3000"
| shun="false"
| view_bundling="true"/>
| <FC max_credits="500000"
| min_threshold="0.20"/>
| <FRAG2 frag_size="60000" />
| <!--pbcast.STREAMING_STATE_TRANSFER /-->
| <pbcast.STATE_TRANSFER />
| <!-- pbcast.FLUSH /-->
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