[lustre-discuss] Serious interoperability problem lustre 2.8 server side with lustre 2.9 clients

[Jones, Peter A]

Fernando

Could you please open a JIRA ticket to track this issue?

Thanks

Peter

On 12/19/16, 5:33 AM, "lustre-discuss on behalf of Fernando Perez"
<lustre-discuss-bounces at lists.lustre.org on behalf of fperez at icm.csic.es>
wrote:

>Dear lustre experts.
>
>I detect a serious interoperability problem between lustre 2.8 server
>side and lustre 2.9 clients:
>
>We have a lustre 2.8 on mgs/mds and oss's and lustre 2.8 clients.
>Yesterday I update a couple of clients to lustre 2.9 and I detect that
>this clients cannot read a lot of files of our lustre filesystem. The
>outputs when we try to read several files is the following:
>
>[root at turing lustre-2.9.0_el7_client]# lfs getstripe
>/mnt/lustre/users/cgabarro/L3_cadena_interna/comparacio_SSSL2_ARGO/filter_
>case_3/TOT_results_SMOS_argo_filter_v3_20110221_20110302.dat
>error opening 
>/mnt/lustre/users/cgabarro/L3_cadena_interna/comparacio_SSSL2_ARGO/filter_
>case_3/TOT_results_SMOS_argo_filter_v3_20110221_20110302.dat:
>No such file or directory (2)
>llapi_semantic_traverse: Failed to open
>'/mnt/lustre/users/cgabarro/L3_cadena_interna/comparacio_SSSL2_ARGO/filter
>_case_3/TOT_results_SMOS_argo_filter_v3_20110221_20110302.dat':
>No such file or directory (2)
>error: getstripe failed for
>/mnt/lustre/users/cgabarro/L3_cadena_interna/comparacio_SSSL2_ARGO/filter_
>case_3/TOT_results_SMOS_argo_filter_v3_20110221_20110302.dat
>
>As you can see in other clients with lustre 2.8 clients there is no
>problem to read this file:
>
>[root at gaia ~]# lfs getstripe
>/mnt/lustre/users/cgabarro/L3_cadena_interna/comparacio_SSSL2_ARGO/filter_
>case_3/TOT_results_SMOS_argo_filter_v3_20110221_20110302.dat
>/mnt/lustre/users/cgabarro/L3_cadena_interna/comparacio_SSSL2_ARGO/filter_
>case_3/TOT_results_SMOS_argo_filter_v3_20110221_20110302.dat
>lmm_stripe_count:   1
>lmm_stripe_size:    1048576
>lmm_pattern:        1
>lmm_layout_gen:     2
>lmm_stripe_offset:  3
>     obdidx         objid         objid         group
>          3           5235570         0x4fe372                 0
>
>This problem only happens with lustre 2.9 clients and there is no errors
>in the oss and mds/mgs servers. I see that this problems only happens
>when I read some files, not all files, from some ldiskfs ost's.
>
>After downgrade to 2.8 lustre the clients we cannot reproduce this
>problem.
>
>Regards.
>
>
>-- 
>=============================================
>Fernando Pérez
>Institut de Ciències del Mar (CMIMA-CSIC)
>Departament Oceanografía Física i Tecnològica
>Passeig Marítim de la Barceloneta,37-49
>08003 Barcelona
>Phone:  (+34) 93 230 96 35
>=============================================
>
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