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Posted to user@zookeeper.apache.org by Avinash Lakshman <av...@gmail.com> on 2010/10/07 06:49:58 UTC
Changing configuration
Suppose I have a 3 node ZK cluster composed of machines A, B and C. Now for
whatever reason I lose C forever and the machine needs to be replaced. How
do I handle this situation? Update the config with D in place of C and
restart the cluster? Also if I am interested in read just the ZAB portions
which packages should I be looking at?
Cheers
A
Re: Changing configuration
Posted by Ted Dunning <te...@gmail.com>.
Restart all clients ... eventually. No need for a grand hurry unless your
ZK servers are very busy.
On Thu, Oct 7, 2010 at 2:29 PM, Adam Lazur <ad...@lazur.org> wrote:
> Restart all clients too.
>
> .laz
>
> Patrick Hunt (phunt@apache.org) said:
> > You probably want to do a "rolling restart", this is preferable over
> > "restart the cluster" as the service will not go down.
> > http://wiki.apache.org/hadoop/ZooKeeper/FAQ#A6
> >
> > <http://wiki.apache.org/hadoop/ZooKeeper/FAQ#A6>Patrick
> >
> > On Wed, Oct 6, 2010 at 9:49 PM, Avinash Lakshman <
> avinash.lakshman@gmail.com
> > > wrote:
> >
> > > Suppose I have a 3 node ZK cluster composed of machines A, B and C. Now
> for
> > > whatever reason I lose C forever and the machine needs to be replaced.
> How
> > > do I handle this situation? Update the config with D in place of C and
> > > restart the cluster? Also if I am interested in read just the ZAB
> portions
> > > which packages should I be looking at?
> > >
> > > Cheers
> > > A
> > >
>
Re: Changing configuration
Posted by Adam Lazur <ad...@lazur.org>.
Restart all clients too.
.laz
Patrick Hunt (phunt@apache.org) said:
> You probably want to do a "rolling restart", this is preferable over
> "restart the cluster" as the service will not go down.
> http://wiki.apache.org/hadoop/ZooKeeper/FAQ#A6
>
> <http://wiki.apache.org/hadoop/ZooKeeper/FAQ#A6>Patrick
>
> On Wed, Oct 6, 2010 at 9:49 PM, Avinash Lakshman <avinash.lakshman@gmail.com
> > wrote:
>
> > Suppose I have a 3 node ZK cluster composed of machines A, B and C. Now for
> > whatever reason I lose C forever and the machine needs to be replaced. How
> > do I handle this situation? Update the config with D in place of C and
> > restart the cluster? Also if I am interested in read just the ZAB portions
> > which packages should I be looking at?
> >
> > Cheers
> > A
> >
Re: Changing configuration
Posted by Patrick Hunt <ph...@apache.org>.
You probably want to do a "rolling restart", this is preferable over
"restart the cluster" as the service will not go down.
http://wiki.apache.org/hadoop/ZooKeeper/FAQ#A6
<http://wiki.apache.org/hadoop/ZooKeeper/FAQ#A6>Patrick
On Wed, Oct 6, 2010 at 9:49 PM, Avinash Lakshman <avinash.lakshman@gmail.com
> wrote:
> Suppose I have a 3 node ZK cluster composed of machines A, B and C. Now for
> whatever reason I lose C forever and the machine needs to be replaced. How
> do I handle this situation? Update the config with D in place of C and
> restart the cluster? Also if I am interested in read just the ZAB portions
> which packages should I be looking at?
>
> Cheers
> A
>
Re: Changing configuration
Posted by Milind Parikh <mi...@gmail.com>.
RT@M
-- Milind
On Wed, Oct 6, 2010 at 9:49 PM, Avinash Lakshman <avinash.lakshman@gmail.com
> wrote:
> Suppose I have a 3 node ZK cluster composed of machines A, B and C. Now for
> whatever reason I lose C forever and the machine needs to be replaced. How
> do I handle this situation? Update the config with D in place of C and
> restart the cluster? Also if I am interested in read just the ZAB portions
> which packages should I be looking at?
>
> Cheers
> A
>
Re: Changing configuration
Posted by Flavio Junqueira <fp...@yahoo-inc.com>.
We don't have dynamic configuration yet, but it is on our todo list:
http://wiki.apache.org/hadoop/ZooKeeper/ClusterMembership
so for now I believe you would have to reconfigure manually and
restart the cluster. For Zab, you should be looking at
org.apache.zookeeper.server.quorum.
Cheers,
-Flavio
On Oct 7, 2010, at 6:49 AM, Avinash Lakshman wrote:
> Suppose I have a 3 node ZK cluster composed of machines A, B and C.
> Now for
> whatever reason I lose C forever and the machine needs to be
> replaced. How
> do I handle this situation? Update the config with D in place of C and
> restart the cluster? Also if I am interested in read just the ZAB
> portions
> which packages should I be looking at?
>
> Cheers
> A
flavio
junqueira
research scientist
fpj@yahoo-inc.com
direct +34 93-183-8828
avinguda diagonal 177, 8th floor, barcelona, 08018, es
phone (408) 349 3300 fax (408) 349 3301