Am Dienstag, den 19.08.2014, 12:18 -0400 schrieb Joey Hess:
> Nils Asmussen wrote:
> > the setup is as follows: I have two computers. Using the git-annex webapp,
> > I set up a usb dongle to sneakernet files between them.
> > Whenever I connect the usb dongle to one of the computers, the files are
> > transferred as expected.
> >
> > But: When I then try to unmount the usb device, I get an error message. The
> > device cannot be unmounted because it still has opened files.
> > I expect to be able to unmount the device without problems after the
> > transfer has completed.
>
> > The files are held open by
> > $ ps 14141
> > PID TTY STAT TIME COMMAND
> > 14141 ? SN 0:00 git --git-dir=/media/nils/USB/annex cat-file
> > --batch
>
> It seems to me that you have configured the git-annex assistant to run
> in the repository in your USB device. Since it's a daemon, it will
> necessarily keep files open on the device and so prevent it from being
> unmounted. That's why this is not a recommended configuration.
>
> Intead, the way it's supposed to work is that you run the git-annex
> assistant in only the repository located on your computer. It will then
> notice when the USB device is connected and take care of syncing with
> it.
>
> To fix your configuration, you can edit ~/.config/git-annex/autostart and
> remove the line for /media/nils/USB/annex.
>
Thank you for your fast reply.
The configuration cannot be fixed the way proposed, because there is no
entry like /media/nils/... in the file ~/.config/git-annex/autostart.
Note that the processes blocking the USB device are all git processes.
The repository on the computer is also "blocked" by git-annex processes.
The problem seems to be that
git --git-dir=/media/nils/USB/annex cat-file --batch
should be closed after completing all transfers, but is not closed. This
process is started by the git-annex assistant running
in /home/nils/sync.
Coming back to my workaround, I observed that it takes about a minute
after clicking on restart till the git cat-file process closes. (Without
restarting, it doesn't close even after waiting half an hour.)
I have set up the syncing as follows.
On the first computer I created a repository. Then I clicked "Add
another repository" -> "removable drive" to create the repository on the
USB device and chose "combine repositories".
On the second computer I also created a repository and then repeated the
steps for adding the USB device.
I guess this is the way git-annex is supposed to work, right?
Below is some part of the log file after entering
$ echo test > delete_me.txt
There is a line mentioning chat: git cat-file on /media/nils/USB/annex.
This is probably the starting point of git cat-file, but there is no
line mentioning the program to be closed again.
[2014-08-20 15:37:08 CEST] Watcher: add direct delete_me.txt
[2014-08-20 15:37:08 CEST] Watcher: add direct delete_me.txt
[2014-08-20 15:37:08 CEST] read: lsof
["-F0can","+d","/home/nils/sync/.git/annex/misctmp/"]
[2014-08-20 15:37:08 CEST] Committer: Adding delete_me.txt
...
[2014-08-20 15:37:08 CEST] TransferWatcher: transfer starting: Upload UUID
"b4e52d17-7295-4e3e-9550-9b05b9edb131" delete_me.txt Nothing
[2014-08-20 15:37:08 CEST] TransferWatcher: transfer starting: Upload UUID
"b4e52d17-7295-4e3e-9550-9b05b9edb131" delete_me.txt Nothing
[2014-08-20 15:37:09 CEST] read: rsync
["--progress","--inplace","--perms","/home/nils/sync/delete_me.txt","/media/nils/USB/annex/annex/tmp/SHA256E-s5--f2ca1bb6c7e907d06dafe4687e579fce76b37e4e93b7605022da52e6ccc26fd2.txt"]
delete_me.txt
5 100% 0.00kB/s 0:00:00
5 100% 0.00kB/s 0:00:00 (xfr#1, to-chk=0/1)
[2014-08-20 15:37:09 CEST] TransferWatcher: transfer starting: Upload UUID
"b4e52d17-7295-4e3e-9550-9b05b9edb131" delete_me.txt Just 5
[2014-08-20 15:37:09 CEST] chat: git
["--git-dir=/media/nils/USB/annex","cat-file","--batch"]
To /media/nils/USB/annex
8715f28..1f23774 git-annex -> synced/git-annex
8d53719..7189b57 annex/direct/master -> synced/master
...
[2014-08-20 15:37:09 CEST] TransferWatcher: transfer finishing: Transfer
{transferDirection = Upload, transferUUID = UUID
"b4e52d17-7295-4e3e-9550-9b05b9edb131", transferKey = Key {keyName =
"f2ca1bb6c7e907d06dafe4687e579fce76b37e4e93b7605022da52e6ccc26fd2.txt",
keyBackendName = "SHA256E", keySize = Just 5, keyMtime = Nothing}}
[2014-08-20 15:37:09 CEST] Transferrer: Uploaded delete_me.txt
[2014-08-20 15:37:11 CEST] Pusher: Syncing with KeyPrivate
...
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