[Lustre-discuss] version 1.4 mount 1.6

[Brian W. Johanson]

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.

brian

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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