[OpenAFS] what is the backup order of the fileserver exploration for a given volset?

[Stephen Joyce]

On Fri, 8 Apr 2016, Giovanni Bracco wrote:

> In our AFS cell we have 9 fileservers (openafs 1.6.5 to 1.6.15) distributed 
> over WAN and we use the native openafs backup system, which works well (max 
> size of a volume is 200 GB)
>
> We have defined a volset for all the .backup volumes of all fileservers and 
> we have one AFS backup server that performs the backup for all the 
> fileservers, both the local and remote ones.
>
> As the backup duration is very different for local fileserver (~60 MB/s) and 
> remote fileservers (~3 MB/s) it would be very nice to know in advance what is 
> the order chosen by the backup  process for a given volset.
>
> The experience shows that it is NOT the order in which the fileservers appear 
> in the volset definition.
>
> Any suggestion?

In my experience, if I need to know items will be handled in a certain 
order, I treat the items separately. Can you split your volumeset into 
multiple volumesets based on location (local vs WAN)? That way you can 
control order of volumesets knowing each is all-local or all-remote 
volumes.

> Bye
>
> Giovanni
>
>
> -- 
> Giovanni Bracco
> DTE-ICT-HPC
> ENEA
> Via E. Fermi 45
> I-00044 Frascati (Roma) Italy
> phone +39-06-9400-5597  mobile +39-3351992144
> FAX   +39-06-9400-5735
> E-mail  giovanni.bracco@enea.it
> WWW http://www.afs.enea.it/bracco
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