[Gluster-devel] [Gluster-users] Trashcan issue with vim editor

[Anoop C S]

On Wed, 2016-01-27 at 15:25 +0530, PankaJ Singh wrote:
> 
> Hi,
> 
> We are using gluster 3.7.6 on ubuntu 14.04. We are facing an issue
> with trashcan feature.
> Our scenario is as follow:
> 
> 1. 2 node server (ubuntu 14.04 with glusterfs 3.7.6)
> 2. 1 client node (ubuntu 14.04)
> 3. I have created one volume vol1 with 2 bricks in replica and with
> transport = tcp mode.
> 4. I have enabled quota on vol1
> 5. Now I have enabled trashcan feature on vol1 
> 6. Now I have mounted vol1 on client's home directory "mount -t
> glusterfs -o transport=tcp server-1:/vol1 /home/"
> 7. Now when I logged in via any existing non-root user and perform
> any editing via vim editor then I getting this error "E200: *ReadPre
> autocommands made the file unreadable" and my user's home
> directory permission get changed to 000. after sometime these
> permission gets revert back automatically.
> 
> (NOTE: user's home directories are copied in mounted directory
> glusterfs volume vol1)
> 

As discussed over irc, we will definitely look into this issue [1] and
get back asap. On the other side, I have some solid reasons in
recommending not to use swap/backup files, created/used by Vim, when
trash is enabled for a volume (assuming you have the basic vimrc config
where swap/backup files are enabled by default):

1. You will see lot of foo.swpx/foo.swp files (with time stamp appended
   in their filenames) inside trashcan as Vim creates and removes these
   swap files every now and then.

2. Regarding backup files, you will notice a list of 4913 named files
   inside .trashcan. These files are created and deleted by Vim to make
   sure that it can create files in the current directory. And of
   course every time you save it with :w.

3. Similar is the case with undo files like .foo.un~.

4. Last but not the least, every time you do a :w, Vim performs a
   truncate operation which will cause the previous version of file to
   be moved to .trashcan.

Having said that, you can insert the following lines to your vimrc file
to prevent those unnecessary files, described through first 3 points,
to land inside .trashcan.

set noundofile
set noswapfile
set nobackup
set nowritebackup

As per the current implementation, we cannot prevent previous versions
of file being created inside trash directory and I think these files
will serve as backup files for future which is a good to have feature.

[1] https://bugzilla.redhat.com/show_bug.cgi?id=1302307

--Anoop C S

> 
> Thanks & Regards
> PankaJ Singh
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