[Linux-cluster] any best practice for number of new GFS journal to add?

[Ian Hayes]

The number of journals you have is dependant on the number of cluster
members using that GFS filesystem, not the size of it. As I understand it,
you may have to tweak the size of the journals if you're doing a lot of I/O.
At a minimum, you're going to need N journals, where N is the number of
cluster members using the GFS volume. I generally create N+1 journals in
case I need to add a host quickly and I might forget to add a journal
otherwise.


On Tue, Dec 29, 2009 at 12:59 AM, Diamond Li <diamondiona at gmail.com> wrote:

> hello everyone,
>
> I feel a little bit confused about gfs_jadd. my understanding is we do
> not have to add new journal after we extend file system size because
> current size may be enough,  is it true ?
>
> is there any best pratice for when should we add new journal, the
> right number of new added journal, and journal size? for instance, if
> my file system grows from 2G to 4G, what would be the right answer for
> my questions, and it grows from 2T to 4T, etc.
>
> best regards!
>
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