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offload: Allow one transfer in each direction simultaneously.

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* guix/scripts/offload.scm (transfer-and-offload): Use 'upload' lock
  instead of 'bandwidth' around 'send-files' calls, and 'download' lock
  around 'retrieve-files' call.
This commit is contained in:
Ludovic Courtès 2014-03-26 15:03:14 +01:00
parent 3dfd8af534
commit 236e66481d
1 changed files with 5 additions and 5 deletions
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10
guix/scripts/offload.scm
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@ -324,10 +324,10 @@ there, and write the build log to LOG-PORT. Return the exit status."
"Offload DRV to MACHINE. Prior to the actual offloading, transfer all of
INPUTS to MACHINE; if building DRV succeeds, retrieve all of OUTPUTS from
MACHINE."
;; Acquire MACHINE's exclusive lock to serialize file transfers
;; to/from MACHINE in the presence of several 'offload' hook
;; instance.
(when (with-machine-lock machine 'bandwidth
;; Acquire MACHINE's upload or download lock to serialize file transfers in
;; a given direction to/from MACHINE in the presence of several 'offload'
;; hook instance.
(when (with-machine-lock machine 'upload
(send-files (cons (derivation-file-name drv) inputs)
machine))
(let ((status (offload drv machine
@ -337,7 +337,7 @@ MACHINE."
(if (zero? status)
(begin
;; Likewise (see above.)
(with-machine-lock machine 'bandwidth
(with-machine-lock machine 'download
(retrieve-files outputs machine))
(format (current-error-port)
"done with offloaded '~a'~%"