[gpfsug-discuss] Read-only mount option for GPFS version 4.2.3.19

[Luis Bolinches]

Hi

>From phone so typos are expected.

You maybe would like to look into remo mounts and export the FS only as ro
to the client cluster.

--
Cheers

> On 4. Mar 2020, at 12.05, Agostino Funel <agostino.funel at enea.it> wrote:
>
> Hi,
>
> we have a GPFS cluster version 4.2.3.19. We have seen in the official
> "Administration and Programming Reference" (version 4 Release 2.0, pag.
> 28) that the read-only mount option (-o ro)  is not explicitly cited.
> This option is supported in version 5.*.
>
> However we tried, as a test, the -o ro mount option on two clients with
> the following SO and kernels
>
> client 1
>
> CentOS Linux release 7.3.1611 (Core)
> uname -r
> 3.10.0-514.26.2.el7.x86_64
>
>
> client 2
>
> CentOS release 6.4 (Final)
> uname -r
> 2.6.32-358.23.2.el6.x86_64
>
> and it worked fine.
>
> The -o ro option is non permanent in the sense that unmounting and
> remounting the file system on these clients it turned in r/w original
state.
>
> Now, we have the necessity of setting read-only the file system on all
> clients of our cluster.
>
> The question is: could we safely use the -o ro option for all clients
> even if this option is not cited in the official (v. 4 release 2.0)
> documentation?
>
> Thank you very much.
>
> Best regards,
>
> Agostino Funel
>
>
>
>
> --
> Agostino Funel
> DTE-ICT-HPC
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> E-mail: agostino.funel at enea.it
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