[Lustre-discuss] OST problem

[Wojciech Turek]

Hi Lucius,

I am not exactly sure what are you trying to do here. Do you have two OSS
servers, first old one currently in production (OST 50% full), second a new
one that you want to attach to your Lustre filesystem with (OST empty)?
Do you want to create a mirror of old OST on the new OST?

Adding a new failnode in Lustre is simple and can be done while filesystem
is running. For that you use tunefs.lustre or lctl API, examples are in the
Lustre manual.
If you would like to change current failonde configuration, for example
change IP address or network type, you will need to stop Lustre filesystem
and amend the configuration while lustre is stopped, please see examples in
manual.

Cheers

Wojciech

On 4 March 2011 15:16, Lucius <luciusftp at hotmail.com> wrote:

> Hi Larry,
>
> thank you for your answer, but I do not have the chance to use infiniband.
> This description also starts with formatting the fs. I don't want to format
> the already in user node. I would like to extend it online.
> Is it possible to achieve full sync of the data of the two nodes (the one
> existing already, and the second is the new that is on the new server about
> to be attached) The old node has 50% of its capacity uploaded, the new node
> is completely empty.
>
> So the question is, how do I add a failnode to an online system and how do
> I
> manage to get the data to be in synchron.
> Hope someone can help
>
> thank you,
> Lucius
>
> ----- Eredeti üzenet -----
> From: Larry
> Sent: Tuesday, March 01, 2011 6:25 AM
> To: Lucius
> Cc: lustre-discuss at lists.lustre.org
> Subject: Re: [Lustre-discuss] OST problem
>
> Hi Lucius,
> lustre manual  chapter 15 tells you how to do it
>
>
> On Tue, Mar 1, 2011 at 1:05 PM, Lucius <luciusftp at hotmail.com> wrote:
> > Hello everyone,
> >
> > I would like to extend a OSS, which is still in current use. I would like
> > to
> > extend it with a server which has exactly the same HW configuration, and
> I’d
> > like to extend it in an active/active mode.
> > I couldn’t find any documentation about this, as most of the examples
> show
> > how to use failnode during formatting. However, I need to extend the
> > currently working system without losing data.
> > Also, tunefs.lustre examples show only the parameter configuration, but
> > they
> > won’t tell if you need to synchronize the file system before setting the
> > How
> > would the system know that on the given server identified by its unique
> > IP,
> > which OST mirrors should run?
> >
> > Thank you in advance,
> > Viktor
> > _______________________________________________
> > Lustre-discuss mailing list
> > Lustre-discuss at lists.lustre.org
> > http://lists.lustre.org/mailman/listinfo/lustre-discuss
> >
> >
>
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