Re: [jgroups-dev] Is UNICAST needed in my configuration?

Yes, you still need UNICAST even when TCP's the transport: =

https://community.jboss.org/wiki/TcpAndUnicast.

I suggest use UNICAST2 instead of UNICAST though

On 8/29/13 11:50 PM, Sundararajan, Mukund wrote:
> Hi Bela,
>
> Our jgroups cluster uses TCP for transport and we multicast messages (
> send address =3D null in jchannel.send() ). Do I need UNICAST in the
> protocol stack? We have a customer where a node is in Asia and another
> in Europe and the network delays are significant between the two ( PING
> experiences 400 ms delay ). The default UNICAST retransmission timeouts
> are causing a lot of retransmissions to happen eventually blocking all
> sends in the LinkedBlockingQueue in TCP. Do I need UNICAST in my stack
> in the first place since I am using TCP for transport and since we
> always send to all nodes?
>
> Here is my configuration =E0
>
> <config
>
> _xmlns_=3D"urn:org:jgroups"
>
>              xmlns:xsi=3D"http://www.w3.org/2001/XMLSchema-instance"
>
>              xsi:schemaLocation=3D"urn:org:jgroups
> http://www.jgroups.org/schema/JGroups-3.0.xsd" >
>
>        <TCP
>
>                                bind_port=3D"9802"
>
> _loopback_=3D"true"
>
>                                recv_buf_size=3D"20000000"
>
>                                send_buf_size=3D"640000"
>
>                                discard_incompatible_packets=3D"true"
>
>                                max_bundle_size=3D"64000"
>
>                                max_bundle_timeout=3D"30"
>
>                                enable_bundling=3D"true"
>
>                                use_send_queues=3D"false"
>
>                                sock_conn_timeout=3D"300"
>
>                                thread_pool.enabled=3D"true"
>
>                                thread_pool.min_threads=3D"10"
>
>                                thread_pool.max_threads=3D"100"
>
>                                thread_pool.keep_alive_time=3D"5000"
>
>                                thread_pool.queue_enabled=3D"false"
>
>                                thread_pool.queue_max_size=3D"100"
>
>                                thread_pool.rejection_policy=3D"Discard"
>
>                                oob_thread_pool.enabled=3D"true"
>
>                                oob_thread_pool.min_threads=3D"10"
>
>                                oob_thread_pool.max_threads=3D"100"
>
>                                oob_thread_pool.keep_alive_time=3D"5000"
>
>                                oob_thread_pool.queue_enabled=3D"false"
>
>                                oob_thread_pool.queue_max_size=3D"100"
>
>                                oob_thread_pool.rejection_policy=3D"Discar=
d" />
>
>        <TCPPING
>
>                                timeout=3D"6000"
>
>                                initial_hosts=3D""
>
>                                port_range=3D"0"
>
>                                num_initial_members=3D"1"
>
>                                num_ping_requests=3D"6" />
>
>        <MERGE2
>
>                                max_interval=3D"100000"
>
>                                min_interval=3D"20000" />
>
>        <FD_SOCK />
>
>        <FD
>
>                                timeout=3D"10000"
>
>                                max_tries=3D"5" />
>
>        <VERIFY_SUSPECT
>
>                                timeout=3D"1500" />
>
>        <BARRIER />
>
>        <pbcast.NAKACK
>
>                                use_mcast_xmit=3D"false"
>
>                                retransmit_timeout=3D"300,600,1200,2400,48=
00"
>
>                                discard_delivered_msgs=3D"true" />
>
>        <UNICAST
>
>                                timeout=3D"300,600,1200" />
>
>        <pbcast.STABLE
>
>                                stability_delay=3D"1000"
>
>                                desired_avg_gossip=3D"50000"
>
>                                max_bytes=3D"400000" />
>
>        <pbcast.GMS
>
>                                print_local_addr=3D"true"
>
>                                join_timeout=3D"60000"
>
>                                view_bundling=3D"true" />
>
>        <FRAG2
>
>                                frag_size=3D"60000" />
>
>        <pbcast.STATE_TRANSFER/>
>
> </config>
>
> Thanks
>
> Mukund
>
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-- =

Bela Ban, JGroups lead (http://www.jgroups.org)

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