From: Tobias Geerinckx-Rice <me@tobias.gr>
To: guix-devel <guix-devel@gnu.org>
Subject: SSHv2 doesn't actually have compression levels
Date: Tue, 30 Jul 2019 03:58:32 +0200 [thread overview]
Message-ID: <87ef28fflj.fsf@nckx> (raw)
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Guix,
While reading (guix scripts offload) in a (failed) attempt to get
offloading working, the following comment caught my eye:
;; We rely on protocol-level compression from libssh to optimize
large data
;; transfers. Warn if it's missing.
which means that we're not currently doing our own compression
inside the tunnel.
This is significant, because it means that the COMPRESS-LEVEL
field of BUILD-MACHINE is completely bogus[0], and probably always
was - unless it once supported SSHv1, which I think we can agree
is not something we want to support today. Nobody's offloading
libreoffice to that old router in the attic.
I'd like to undocument the option, and add a comment noting its
lack of any useful effect to the code, by next week.
Kind regards,
T G-R
[0]: Take a look at OpenSSH's readconf.c, packet.c, and all calls
to start_compression_out().
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next reply other threads:[~2019-07-30 1:58 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-30 1:58 Tobias Geerinckx-Rice [this message]
2019-08-22 21:48 ` SSHv2 doesn't actually have compression levels Ludovic Courtès
2019-08-22 22:00 ` Tobias Geerinckx-Rice
2019-08-23 12:21 ` Ludovic Courtès
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