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authorLudovic Courtès <ludo@gnu.org>2015-09-25 22:21:09 +0200
committerLudovic Courtès <ludo@gnu.org>2015-09-25 22:35:35 +0200
commit5ef9d7deeab348e0f714f91a3c02ce4b72bbe3c1 (patch)
treef51ae2fd26a1ddeab54a749a1b7909f24618d21f /guix
parent62d2b5715703e244c4877cfdaf8fc150df2192c3 (diff)
offload: Use gzip instead of xz for compression on the master.
* guix/scripts/offload.scm (send-files): Use gzip --fast instead of xz.
Diffstat (limited to 'guix')
-rw-r--r--guix/scripts/offload.scm12
1 files changed, 9 insertions, 3 deletions
diff --git a/guix/scripts/offload.scm b/guix/scripts/offload.scm
index c0df03b98f..d594be18e5 100644
--- a/guix/scripts/offload.scm
+++ b/guix/scripts/offload.scm
@@ -474,14 +474,19 @@ success, #f otherwise."
;; Compute the subset of FILES missing on MACHINE, and send them in
;; topologically sorted order so that they can actually be imported.
+ ;;
+ ;; To reduce load on the machine that's offloading (since it's typically
+ ;; already quite busy, see hydra.gnu.org), compress with gzip rather
+ ;; than xz: For a compression ratio 2 times larger, it is 20 times
+ ;; faster.
(let* ((files (missing-files (topologically-sorted store files)))
(pipe (remote-pipe machine OPEN_WRITE
- '("xz" "-dc" "|"
+ '("gzip" "-dc" "|"
"guix" "archive" "--import")
#:quote? #f)))
(format #t (_ "sending ~a store files to '~a'...~%")
(length files) (build-machine-name machine))
- (call-with-compressed-output-port 'xz pipe
+ (call-with-compressed-output-port 'gzip pipe
(lambda (compressed)
(catch 'system-error
(lambda ()
@@ -489,7 +494,8 @@ success, #f otherwise."
(lambda args
(warning (_ "failed while exporting files to '~a': ~a~%")
(build-machine-name machine)
- (strerror (system-error-errno args)))))))
+ (strerror (system-error-errno args))))))
+ #:options '("--fast"))
;; Wait for the 'lsh' process to complete.
(zero? (close-pipe pipe))))))