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Hadoop >> mail # user >> kerberos mapreduce question


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Re: kerberos mapreduce question
If you provision your user/group information via LDAP to all your nodes it
is not a nightmare.

On Thu, Jun 7, 2012 at 7:49 AM, Koert Kuipers <[EMAIL PROTECTED]> wrote:

> thanks for your answer.
>
> so at a large place like say yahoo, or facebook, assuming they use
> kerberos, every analyst that uses hive has an account on every node of
> their large cluster? sounds like an admin nightmare to me
>
> On Thu, Jun 7, 2012 at 10:46 AM, Mapred Learn <[EMAIL PROTECTED]
> >wrote:
>
> > Yes, User submitting a job needs to have an account on all the nodes.
> >
> > Sent from my iPhone
> >
> > On Jun 7, 2012, at 6:20 AM, Koert Kuipers <[EMAIL PROTECTED]> wrote:
> >
> > > with kerberos enabled a mapreduce job "runs as" the user that submitted
> > it.
> > > does this mean the user that submitted the job needs to have linux
> > accounts
> > > on all machines on the cluster?
> > >
> > > how does mapreduce do this (run jobs as the user)? do the tasktrackers
> > use
> > > secure impersonation to run-as the user?
> > >
> > > thanks! koert
> >
>

--
Alejandro