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Re: Proposal: remove krb5-appl (rlogin, rsh, telnet, ftp with krb5 support)

On 2014-01-25 20:23, Joshuah Hurst wrote:
One major advantage over ssh is that krb5-rsh has much lower latency
and overhead (in terms of used cpu time) when executing a plain
/bin/true on a remote host, doing that in a loop over 1000 logins can
take hours with ssh but takes minutes with krb-rsh. ssh is a *major*
pain in the arse if you have a distributed cluster which depends on
rsh/ssh - with ssh the cpu time overhead is so great that it often
doesn't even make sense to call the remote host to offload a job.
krb-rsh is much more lightweight, e.g. consumes much less cpu time.

Given that it is mostly about the handshake, could you try if the ControlMaster feature helps here? At least locally for a user and a given target host (your /bin/true loop example) it should help. For different users or target hosts you will of course still pay the penalty once for each.

Kind regards
Philipp Kern

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