Re: [Bug-tar] [BULK] Re: Question on the one-filesystem option

[Joi L. Ellis]

I've been doing some googling, and the rpc_pipefs is a feature/function/product 
of nfs4.  It's used for communicating between nfs4 servers and clients and 
doesn't contain anything you need to back up, it's all dynamically generated as 
part of client/server interactions.  I'd just put that --one-file-system 
parameter back on your tar command and ignore the whole tree.  I wouldn't 
attempt restoring any of that data into a client filesystem, you'd just muck up 
your existing nfs mounts.  


--
Joi Owen
System Administrator
Pavlov Media, Inc

-----Original Message-----
From: address@hidden [mailto:address@hidden On Behalf Of Gene Heskett
Sent: Monday, July 28, 2014 4:09 AM
To: address@hidden
Cc: address@hidden; address@hidden
Subject: [BULK] Re: Question on the one-filesystem option

On Monday 28 July 2014 04:53:47 address@hidden did opine And Gene did reply:
> On Mon, 28 Jul 2014, Gene Heskett wrote:
> > However, in one failure path it quoted, there are no softlinks. It 
> > simply did not like /var/lib/nfs/rpc_pipefs, which actually goes 2 
> > or 3 levels deeper, encountering no softlinks as it goes.
> > 
> > So I'm still standing here on my stump and proclaiming that tars
> > "--one- file-system" implementation is broken.  And has been since 
> > somewhere post 1.22.
> 
> Hi Gene,
> 
> There is a simple explanation for that: /var/lib/nfs/rpc_pipefs IS a 
> separate file system. On my system I have:
> 
> $ df  /var/lib/nfs/rpc_pipefs
> Filesystem     1K-blocks  Used Available Use% Mounted on
> rpc_pipefs             0     0         0    - /var/lib/nfs/rpc_pipefs
> 
> $ mount | grep pipe
> rpc_pipefs on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw,relatime)
> 
> So /var/lib/nfs/rpc_pipefs is a mountpoint for a file system of type 
> "rpc_pipefs" (whatever that might be). I'm pretty sure it is volatile 
> and will be recreated automatically at start-up, so no need to back it 
> up.
> 
> Bob

Crazy.  There is no evidence of that shown by an ls -l being executed anyplace 
in that tree.

I'll do a similar df check on the other failure points.  When I am fully awake. 
No one would accuse me of that at 5am local.

Cheers, Gene Heskett
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