[Lustre-discuss] bad write checksums

[Charles Taylor]

On Jul 24, 2009, at 10:33 AM, Craig Prescott wrote:

>
> Hi;
>
> We've been testing some 1.8.0.1 patchless clients (RHEL5.3, x86_64,  
> RPMs
> from the Sun download page) with out 1.6.4.2 servers.

Just to clarify the typo...

That should have been "with our" 1.6.4.2 servers.     We are running  
1.8.0.1 patch-less clients with 1.6.4.2 on the MGS/MDS and OSSs and  
getting the messages Craig refers to below.

ct

> The OSS nodes started logging these LustreErrors from the 1.8.0.1  
> clients:
>
>> LustreError: 7302:0:(ost_handler.c:1157:ost_brw_write()) client  
>> csum 8448447f, original server csum 66fb7cff, server csum now  
>> 66fb7cff
>> LustreError: 7302:0:(ost_handler.c:1157:ost_brw_write()) Skipped 1  
>> previous similar message
>> LustreError: 7391:0:(ost_handler.c:1095:ost_brw_write()) client  
>> csum 9d8c7d6a, server csum 2cfdcb47
>> LustreError: 168-f: ufhpc-OST0004: BAD WRITE CHECKSUM: changed in  
>> transit before arrival at OST from 12345-10.13.28.55 at tcp inum  
>> 38470778/1485322248 object 67094039/0 extent [0-1023]
>
> Is this a known issue with running 1.8.0.1 clients against 1.6.4.2
> servers?  We aren't seeing these messages in relation to our 1.6  
> clients.
>
> Looking through the Lustre bugzilla, I see bug 18296, which discusses
> these messages, but it was logged against Lustre version 1.6.6.
>
> Cheers,
> Craig
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