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

[Agostino Funel]

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
ENEA
P.le E. Fermi 1
80055 Portici (Napoli) Italy
Phone: (+39) 081-7723575
Fax: (+39) 081-7723344
E-mail: agostino.funel at enea.it
WWW: http://www.afs.enea.it/funel



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