[Lustre-discuss] mkfs.lustre options

[Ron Croonenberg]

I get the first part,  however I also need to mention thenids for the 
"internal" network. We're using fine grain routing, we have an internel 
IB network and 4 seperate "lanes" of IB going out

But as I understand it, all nids need to be used with mkfs.lustre even 
though no one outside of the FS server network can really see those.

On 02/03/2015 04:23 PM, Dilger, Andreas wrote:
> The --mgsnode info is used by the client to fetch the config data at mount time, and it keeps a connection open to the MGS to be notified of config updates (including server restarts) at runtime.
>
> The --failover or --servicenode info is sent from the servers to the MGS at first mount to generate the config that the clients are using to mount. If a server has multiple NIDs then the clients will try all of them if it loses the connection during operation (i.e. if the service is failed over to another node).
>
> The LNet config is completely separate from the Lustre server config, because there may be multiple Lustre filesystems sharing the same LNet network(s).
>
> Cheers, Andreas
>
>> On Feb 3, 2015, at 12:23, Ron Croonenberg <ronc at lanl.gov> wrote:
>>
>> Hello,
>>
>> are the options --mgsnode and --failover in mkfs.lustre (for mdt and ost) used for "internal" purposes (so Lustre know what can be mounted where and what the possible locations are for the MGS/MDT and OSTs ?)
>>
>> Or are these values advertised, somehow, outside the file system (to the LNETs maybe?)
>>
>> thanks,
>>
>> Ron
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