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Zookeeper, mail # user - Changing hosts


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Re: Changing hosts
Vishal Kher 2011-05-12, 18:11
Hi Murali,

What sid/IP/port combination are you using? Make sure that the sids are
unique. Can you attach your zoo.cfg files?
btw, I still think scp is the simpler in your case.

-Vishal

On Thu, May 12, 2011 at 2:07 PM, Murali Krishna. P
<[EMAIL PROTECTED]>wrote:

> all nodes in DEF was logging ServerNotRunning and was connecting to 'A' to
> get the snapshot. I restarted ZK in A and it worked fine after that. Thanks
> guys.
>
>
> Thanks,
> Murali Krishna
>
>
> ________________________________
> From: Ted Dunning <[EMAIL PROTECTED]>
> To: [EMAIL PROTECTED]; Murali Krishna. P <[EMAIL PROTECTED]>
> Sent: Thursday, 12 May 2011 10:47 PM
> Subject: Re: Changing hosts
>
> I should have added this:
>
> http://zookeeper.apache.org/doc/r3.1.2/zookeeperAdmin.html#sc_zkCommands
>
> <http://zookeeper.apache.org/doc/r3.1.2/zookeeperAdmin.html#sc_zkCommands
> >to
> explain what I meant by that.  I meant to say "when you send the 'stat'
> command, what do you get"?
>
> On Thu, May 12, 2011 at 10:16 AM, Ted Dunning <[EMAIL PROTECTED]>
> wrote:
>
> > When you ask each of the new nodes what their status is, what do they
> say?
> >
> >
> > On Thu, May 12, 2011 at 9:09 AM, Murali Krishna. P <
> [EMAIL PROTECTED]
> > > wrote:
> >
> >> Hi,
> >>      even after 1 hour, the version-2 dir seems to be empty on all 3 new
> >> nodes. Can i just copy the last log.x and last snapshot.x file from
> >> corresponding old nodes and bounce new nodes with new config?
> >>
> >>
> >> Thanks,
> >> Murali Krishna
> >>
> >>
> >> ________________________________
> >> From: Murali Krishna. P <[EMAIL PROTECTED]>
> >> To: Vishal Kher <[EMAIL PROTECTED]>; "[EMAIL PROTECTED]" <
> >> [EMAIL PROTECTED]>
> >> Sent: Thursday, 12 May 2011 8:45 PM
> >> Subject: Re: Changing hosts
> >>
> >> Thanks for the suggestion, but I had already started the process which
> >> Alex had mentioned and DEF is started with ABC. How can we know whether
> DEF
> >> is synced ? the data/version-2 dir is empty, i guess i need to wait till
> it
> >> gets some data there?
> >>
> >>
> >> Thanks,
> >> Murali Krishna
> >>
> >>
> >> ________________________________
> >> From: Vishal Kher <[EMAIL PROTECTED]>
> >> To: [EMAIL PROTECTED]; Murali Krishna. P <
> [EMAIL PROTECTED]>
> >> Sent: Thursday, 12 May 2011 7:24 PM
> >> Subject: Re: Changing hosts
> >>
> >>
> >> Hi,
> >>
> >> Since you can stop clients, another way to achieve what Alex suggested
> is
> >> to:
> >>
> >> 1. stop clients
> >> 2. stop all current zk servers (a_i)
> >> 3. scp -r /etc/zookeeper/ from a_i to b_i
> >> 4. scp -r /var/zookeeper/ from a_i to b_i
> >> 5. On all b_i, edit /etc/zookeeper/zoo.cfg to reflect the correct IP
> >> addresses
> >> 5 start all b_i
> >>
> >> This is assuming that stopping ZK server is ok in our environment.
> >>
> >> -Vishal
> >>
> >>
> >> On Thu, May 12, 2011 at 2:07 AM, Murali Krishna. P <
> >> [EMAIL PROTECTED]> wrote:
> >>
> >> Thanks for the responses,
> >> >     I have the luxury of stopping the clients during the operations.
> So,
> >> I would go with the second approach of cloning.
> >> >
> >> >
> >> >Thanks,
> >> >Murali Krishna
> >> >
> >> >
> >> >
> >> >________________________________
> >> >From: Ted Dunning <[EMAIL PROTECTED]>
> >> >To: Alexander Shraer <[EMAIL PROTECTED]>
> >> >Cc: "[EMAIL PROTECTED]" <[EMAIL PROTECTED]>; Murali
> >> Krishna. P <[EMAIL PROTECTED]>; "[EMAIL PROTECTED]"
> <
> >> [EMAIL PROTECTED]>
> >> >Sent: Thursday, 12 May 2011 5:27 AM
> >> >Subject: Re: Changing hosts
> >> >
> >> >
> >> >
> >> >Alex,
> >> >
> >> >I think that this process does a slightly different thing.  Your
> process
> >> is good for cloning a cluster, but it doesn't address the problem of
> >> transitioning a working cluster.  My process never has two clusters with
> the
> >> same data so all transactions will always be applied to a single
> notional
> >> version of the data.