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offload: Disable SSH-level compression. 

* guix/scripts/offload.scm (remote-pipe): Remove '-z' lsh command line
  argument.  This makes transfers almost an order of magnitude slower.
  OpenSSH's ssh(1) man page notes: "Compression is desirable on modem lines
  and other slow connections, but will only slow down things on fast
  networks."  See also
  <http://www.spikelab.org/blog/transfer-largedata-scp-tarssh-tarnc-compared.html>.
master
Ludovic Courtès 2014-03-26 14:58:00 +01:00
parent ee172b1a06
commit 3dfd8af534
1 changed files with 2 additions and 2 deletions
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4
guix/scripts/offload.scm
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@ -136,7 +136,7 @@ determined."
;; "-i" (build-machine-private-key machine)
;; ;; XXX: With lsh 2.1, passing '--write-pid'
;; ;; last causes the PID not to be printed.
;; "--write-pid" "--gateway" "--background" "-z"
;; "--write-pid" "--gateway" "--background"
;; (build-machine-name machine)))
;; (line (read-line port))
;; (status (close-pipe port)))
@ -179,7 +179,7 @@ determined."
(lambda ()
;; Let the child inherit ERROR-PORT.
(with-error-to-port error-port
(apply open-pipe* mode %lshg-command "-z"
(apply open-pipe* mode %lshg-command
"-l" (build-machine-user machine)
"-p" (number->string (build-machine-port machine))