RE: [Maybe SPAM] Re: how to set time on the cluster nodes

From: sanjay K (sanjayk@sunguru.com)
Date: Tue Apr 19 2005 - 09:35:46 EDT

Hi ,

For the sake of precaution , we took both nodes shutdown with the
"scshutdown" command , rebooted in non-cluster mode & set the same time
using the "date" command on both the nodes.Then restarted in cluster
mode.

Thanks for yours valuable suggestions & information

sanjay

--- "Hickey, George" <George.Hickey@ibts.ie> wrote:

From: "Hickey, George" <George.Hickey@ibts.ie>
Date: Tue, 19 Apr 2005 09:56:03 +0100
To: "'sanjayk@sunguru.com'" <sanjayk@sunguru.com>
Subject: RE: [Maybe SPAM] Re: how to set time on the cluster nodes

Hi Sanjay,

I don't know if you've already gotten an answer on this - you have three
choices, some of which you've mentioned:

1. 'date' command - this is not ideal in a clustered environment,
however, if you have root access to both nodes of the cluster, you can
set it, without having to take down or reboot either cluster. The main
danger in using this method is if the cluster software that you are using
is set-up to react in some way if the clocks on each node become too far
out of synchronisation. To get around that, you could have two people
enter the same 'date' command at the same time on two terminals.

2. 'ntpdate' command - if you have a node on your network set-up for use
as an ntp server, you can use the ntpdate command... this works in a
similar manner to the 'date' command. If you look at the man page for
it, it is pretty self-explanatory. The same danger applies as with the
date command above.

3. xntpd daemon - this is by far the best option if it is available to
you. I know from personal experience though that it is not configured in
the standard Solaris 8 install but the packages are there. It doesn't
look as though it is necessary to take down either of the cluster nodes
in order to do this. Of course, you have to have an ntp server to
reference against.

On our 280R here, I just used ntpdate - I put an entry in the root
crontable to synchronise it with our primary network ntp server every
morning at 2am.

I hope this is of some help.
Best regards

George.

-----Original Message-----
From: sanjay K [mailto:sanjayk@sunguru.com]
Sent: 18 April 2005 08:27
To: sunmanager
Subject: [Maybe SPAM] Re: how to set time on the cluster nodes

Hello ,

My question is if there ntp not configured on the servers ,

The way we set the time on the non-cluster systems , the same way can we
set the time or we have do to shutdown of the cluster on the one of the
node & then set the time ?

I hope all of you suggested is to do the ntp configuration. my question
is if n tp is not there ? then how to set the time?

sanjay

--- Alfredo De Luca <deluca.a@bigpond.net.au> wrote:

From: Alfredo De Luca <deluca.a@bigpond.net.au>
Date: Sun, 17 Apr 2005 01:18:01 +1000
To: sanjayk@sunguru.com
Subject: Re: how to set time on the cluster nodes

Have a look on this link..

http://docs.sun.com/app/docs/doc/817-6543/6mlu3j9gc?a=view< /FONT>
< BR>see ya

sanjay K wrote:

>Hi Sunmanagers,
>
>We have a setup of two cluster node,solaris 8 running.
>
>I am aware normally on the standalone systems(non-cluster) with
>the "date" command the time can be set.But on these cluster if i have to
>set the time , is it require to shutdown the nodes & then boot in
>non-cluster mode & then set the date ?
>
>Can you please tell me the procedure to set the time on cluster nodes.
>
>Thanks in advance
>
>sanjay
>________________________________________ _______
>sunmanagers mailing list
>sunmanagers@sunmanagers.org
>http://www.sunmanagers.org/mai lman/listinfo/sunmanagers
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