Calibre hangs when the collection is in an NFS directory

[Damian Nadales]

I set up my ebook library in a NFS folder, and calibre hung. I've tried creating the following options:
    0. create a symbolic link
    1. start calibre using a local folder, then move the folder to the NFS directory and make a symbolic link
but I got the same results.

calibre --verbose does not give any useful output.

calibre-debug fails with the following message:
Traceback (most recent call last):
  File "/usr/bin/calibre-debug", line 19, in <module>
    sys.exit(main())
  File "/usr/lib/calibre/calibre/debug.py", line 232, in main
    ipython()
  File "/usr/lib/calibre/calibre/__init__.py", line 567, in ipython
    from IPython.Shell import IPShellEmbed
ImportError: No module named IPython.Shell

I'm using version 0.7.44, installed from Ubuntu 11.04 repositories.

[John Schember (user-none)]

Support for distro packages are not supported. Ubuntu modifies calibre in ways that break it. Use the binary installer from http://calibre-ebook.com . If you experience the issue using the binary installer please reopen this bug.

[Damian Nadales (dnadales)]

I installed the binary version as you told me and the problem persists. Should I reopen the bug or do I try to re-submit it?

Thanks.

[John Schember (user-none)]

I've reopened it for you.

[Kovid Goyal (kovid)]

File locking on NFS is notoriously poor, sqlite does not work well with it. I
have heard of people having good results putting the calibre library on other
network shares, the most common being dropbox.

 status wontfix

[Tomasz Długosz (tomek3d)]

What about checking whether database is on nfs mounted share on startup, and providing it is, copying it to, say, /tmp. The ebook files themself may stay on the network share. When calibre gets closed, the database could be sent back to the nfs share.

This of course leaves place for not updated database in case of calibre hang...

What do you think?

[Kovid Goyal (kovid)]

See http://manual.calibre-ebook.com/customize.html#environment-variables in particular CALIBRE_OVERRIDE_DATABASE_PATH