Re: Only Nine Jobs Maximum on Remote Server?

[Grant Mc Auley]

Sure enough (didn't notice):

parallel: Warning: ssh to zzz@servername only allows for 10 simultaneous logins.

You may raise this by changing /etc/ssh/sshd_config:MaxStartup on zzz@servername

Using only 9 connections to avoid race conditions.

Thanks Ole and Martin.

However, after changing to eg, MaxStartup 50:30:60 and running seq 100 | parallel -j+0 --eta --sshlogin 32/servername echo, 31 jobs run.  j +1 makes this 32, but why dose j+0 only give 31?

On Wed, Oct 24, 2012 at 2:36 PM, Ole Tange <tange@gnu.org> wrote:

On Tue, Oct 23, 2012 at 10:02 PM, Grant Mc Auley <gamcauley@gmail.com> wrote:
> I have access to a remote server with 4 cpu x 8 cores.  However, when I try
> eg, parallel -j+0 --sshlogin 32/servername, only the default 9 jobs are run
> at a time.  No matter what combinations of -j +/- x and --sshlogin
> z/servername I try, I do not get above 9 jobs.
>
> Sorry if I missed, it but is this a hard upper limit? If not, how can
> increase the number of cores used on the server?

Does GNU Parallel print anything when you run:

  seq 100 | parallel -j+0 --sshlogin 32/servername echo

/Ole