[Lustre-discuss] version 1.4 mount 1.6

Andreas Dilger adilger at sun.com
Tue Jan 22 12:45:03 PST 2008


On Jan 22, 2008  13:58 -0500, Brian W. Johanson wrote:
> How about the interoperability of a 1.6 server with 1.4 routers?  I knew
> clients were possible but I haven't seen any  info on routers.
> 
> Id like to get the servers up to a somewhat new distro but with our XT3
> still on 2.6.9 the routers on ithave to stay at 1.4.

There was one known issue with routing 1.6 clients through 1.4 routers,
but that was resolved (sorry, don't know bug number right now, but it
was a public bug from LLNL so should be findable in bugzilla).

> Aaron Knister wrote:
> > Oh, ok! Thanks!
> > 
> > -Aaron
> > 
> > On Jan 21, 2008, at 6:37 PM, Andreas Dilger wrote:
> > 
> >> On Jan 21, 2008  12:59 -0500, Aaron Knister wrote:
> >>> I have a client running 1.4.11 and i want to mount a filesystem  
> >>> that's
> >>> running on 1.6.4.1 servers. On the client I can ping the servers  
> >>> using
> >>> lctl however a mount fails with an LBUG on the mds.
> >>>
> >>> The mount command on the 1.4.11 client is --
> >>>
> >>> mount -t lustre 192.168.64.70 at o2ib:/data-mdtlov/client /mnt/lustre
> >>>
> >>> The error on the server is --
> >>>
> >>> LustreError: 7369:0:(lov_obd.c:227:lov_connect()) ASSERTION(lov-
> >>>> lov_connects == 1) failed
> >>> LustreError: 7369:0:(tracefile.c:431:libcfs_assertion_failed()) LBUG
> >>> ll_mdt_24     R  running task       0  7369      1          7370   
> >>> 7368
> >>> (L-TLB)
> >>>  ffff81026e92ddd0 ffff8102ba45045c ffff810418438dc0 ffff8102823e0200
> >>>  0000000000000000 ffff810296765000 0000000000000000 ffff81041c2fd280
> >>>  ffffffff888c029f 0000000000000286 ffffffff8003cd0e ffff810418438140
> >>> Call Trace:
> >>>  [<ffffffff888c029f>] :mds:mds_handle+0xe7f/0x56ff
> >>>  [<ffffffff8003cd0e>] lock_timer_base+0x1b/0x3c
> >>>  [<ffffffff8001c1a2>] __mod_timer+0xb0/0xbe
> >>>  [<ffffffff885dcfb0>] :obdclass:class_conn2export+0x250/0x2d0
> >>>  [<ffffffff8868e277>] :ptlrpc:ptlrpc_main+0x1437/0x1df0
> >>>  [<ffffffff800867b0>] default_wake_function+0x0/0xe
> >>>  [<ffffffff8005bc25>] child_rip+0xa/0x11
> >>>  [<ffffffff8868ce40>] :ptlrpc:ptlrpc_main+0x0/0x1df0
> >>>  [<ffffffff8005bc1b>] child_rip+0x0/0x11
> >>>
> >>> I thought 1.4 could mount a 1.6 filesystem.
> >> Only if the filesystem was previously upgraded from a 1.4 system.  If
> >> it was formatted as 1.6 initially there is no "downgrade"  
> >> compatibility
> >> in the configuration logs.
> >>
> >> Cheers, Andreas
> >> --
> >> Andreas Dilger
> >> Sr. Staff Engineer, Lustre Group
> >> Sun Microsystems of Canada, Inc.
> >>
> > 
> > Aaron Knister
> > Associate Systems Analyst
> > Center for Ocean-Land-Atmosphere Studies
> > 
> > (301) 595-7000
> > aaron at iges.org
> > 
> > 
> > 
> > 
> > _______________________________________________
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> > Lustre-discuss at lists.lustre.org
> > http://lists.lustre.org/mailman/listinfo/lustre-discuss
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Cheers, Andreas
--
Andreas Dilger
Sr. Staff Engineer, Lustre Group
Sun Microsystems of Canada, Inc.




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