Multi-nodes in one instance in linux

[Bimal]

Hi,
I am trying to setup 2 logical nodes in a same instance.
I changed the db2nodes.cfg file as
0 db2 0
1 db2 1

i also added db2 an entry
db2
in my hosts.allow file

when i give db2start i get following errir
SQL6048N A communication error occured during START or STOP.

The only information i read on the web is for AIX and actually found
one that shows how to do for AIX.
This is how some one did it.. but it is for AIX.
-----------------------------------------------------------

i found the reason of this problem was i exec "securetcpip" command
before. securetcpip command forbidden rsh, rlogin, rcp etc. i solve
the problem with the following steps.
================================================
root:
chmod 555 /usr/sbin/rshd
chmod u+s /usr/sbin/rshd
chmod 555 /usr/bin/rlogin
stopsrc -s inetd
startsrc -s inetd
echo "+" >/.rhosts
chmod 600 /.rhosts

db2inst1:
echo "+" >/.rhosts
chmod 600 /.rhosts
===============================================
then i can "db2start" the db2 server.
---------------------------------------------------------------
Does any one know how to make this work in linux. Or even if someone
is aware how these /usr/sbin/rshd and .rhosts files managed in linux.
I am using redhat 7.2. Does any one have any idea.
-Bimal

[Darin McBride]

Bimal wrote:

Hi,
I am trying to setup 2 logical nodes in a same instance.
I changed the db2nodes.cfg file as
0 db2 0
1 db2 1

i also added db2 an entry
db2
in my hosts.allow file

when i give db2start i get following errir
SQL6048N A communication error occured during START or STOP.

Start by trying to use rsh yourself between the "nodes". As your
instance owner, run "rsh db2". You should get your command prompt back
without password. If not, solve that problem first, independantly of
DB2.

If that works, but DB2 still doesn't work, the next best place to look
is in your db2diag.log (normally found in sqllib/db2dump). Usually I
find the text there to be more than sufficient to see what the problem
is, and the solution is often self-evident.

If you can't solve the rsh problem, I'm sure there are many great
places to find help for that (other newsgroups), although I'm sure some
in here will be able to help, too.

[Knut Stolze]

Bimal wrote:

Hi,
I am trying to setup 2 logical nodes in a same instance.
I changed the db2nodes.cfg file as
0 db2 0
1 db2 1

i also added db2 an entry
db2
in my hosts.allow file
Is your machine named "db2"?
Did you add a .rhosts file to your instance?
Are the necessary ports defined in your /etc/services file? (This should
have been done automatically when you created the instance.)
when i give db2start i get following errir
SQL6048N A communication error occured during START or STOP.

The only information i read on the web is for AIX and actually found
one that shows how to do for AIX.
This is how some one did it.. but it is for AIX.
-----------------------------------------------------------

i found the reason of this problem was i exec "securetcpip" command
before. securetcpip command forbidden rsh, rlogin, rcp etc. i solve
the problem with the following steps.
================================================
root:
chmod 555 /usr/sbin/rshd
chmod u+s /usr/sbin/rshd
chmod 555 /usr/bin/rlogin
stopsrc -s inetd
startsrc -s inetd
echo "+" >/.rhosts
chmod 600 /.rhosts

db2inst1:
echo "+" >/.rhosts
chmod 600 /.rhosts
===============================================
then i can "db2start" the db2 server.
---------------------------------------------------------------
Does any one know how to make this work in linux. Or even if someone
is aware how these /usr/sbin/rshd and .rhosts files managed in linux.
I am using redhat 7.2. Does any one have any idea.

I don't need any changes on the rshd/rlogin executables. But you do need to
set up the ~/.rhosts file of your instance. Have a look at "man rhosts" to
see how to setup this file.

--
Knut Stolze
Information Integration
IBM Germany / University of Jena