Ok, would be 'free' to do ctrl-e, c, p anyway (since the behavior already
is implemented as a default behavior on connect)

Do you think exclusive write would be an argument to client, or a sequence
to request?  I suppose I could make ctrl-e, c, a "request exclusive-write"
access.  I don't know if a sequence is needed to ask to 'allow shared
write' or just assume client wants either exclusive-write or read-only
until they disconnect...  Also, if a sequence or argument is called for to
prevent others from reading your console as you type or not....



From:   Jonathan Hermann <[email protected]>
To:     xCAT Users Mailing list <[email protected]>
Date:   04/07/2014 10:02 AM
Subject:        Re: [xcat-user] console escape sequences to support



Hi Jarrod,

I'm using ctrl-e, c, p a lot, would be really glad if this could be kept as
an explicit command. At times it's very helpful for debugging. And
especially for stateless nodes I find it way easier than to manually grep
the log files on the xCAT node.


Concerning r/w behaviour: In my experience (though limited, I admit) it
does make sense to have an exclusive-write option. Thinking of larger sites
where multiple persons are maintaining a cluster at the same time.


Mit freundlichen Grüßen / Kind regards

Jonathan (Nathan) Hermann
IT Specialist
Global Technology Services / Data Center Services



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From:            Jarrod B Johnson <[email protected]>
To:              "xCAT Users Mailing list" <[email protected]>
Date:            07.04.2014 15:52
Subject:                 [xcat-user] console escape sequences to support



So in the new console server, thus far all the client currently supports
is:
ctrl-e, c, ? (help)
ctrl-e, c, . (disconnect console)

I'm going to be adding:
 ctrl-e, c, o (reconnect console, note that it already automatically
detects and corrects most situations that I employed ctrl-e, c, o to fixup
today, and that it accelerates fixup of an unconnected session
automatically on client connect)
ctrl-e, c, l, 0 (send break)

Already today, it automatically does something analagous to ctrl-e, c, p on
connection without user request, though I could add it as an explicit
command.

FWIW, the default behavior is currently all clients get write access.  I
recall at least one person requesting the current behavior, but was
wondering how many of the following server-enforced modes would be desired:
shared (many can read and write)
exclusive-write (many can see, only one can write at a time)
exclusive-full (only one can read or write to a console at a given time,
buffered replay would be cleared on close of a client session)
Given that, what would be good escape sequences to represent requesting an
write-exclusive or full-exclusive session?

More generally, any other sequences that are very popular or else would
people prefer a scheme different from the conserver approach?  I personally
have difficultly with the ubiquitous '~' scheme and find it somewhat handy
to not have to think how many ssh sessions I might have nested.
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