Re: How do I make every node have direct access to the file system?

CooLCaT@Vienna wrote:
> let's forget about swap partition for now
>   
(every node has it's own swap)
> there are howtos for mirroring /dev/sda2 with the help of drbd to another
> node
>
> if the master node goes done then the other takes over, as far as i
> understood the whole thing.
> i havent had time yet to play with the drbd solution.
>
> but what happends if the second node goes also down?
> the cluster becomes unavailable.
>   
True.
> so we thought of using a nfs share instead of /dev/sda2
>
> so the master node boots up and instead of using /dev/sda2 as / filesystem
> it uses a
> nfs share. the next node boots from it's hard disk, finds the masternode an
> continues as usual
>
> we tought of using openfiler as nfs server, because openfiler includes also
> failover to a second
> openfiler installation.
>   
And what happens if the second openfiler node goes down?
> the goal is, that every node can become a failover node, not even only two
> nodes which are mirrored via drbd.
>   
Then you realy need every node to have physical access to the root 
filesystem.  But make sure that you're not just replacing the two init 
nodes by two fileserver nodes - that doesn't gain you much.

I'd think about FC or iSCSI for a setup like this.

But how probable is it that both init nodes would go down?
> i think due to my bad english, that there were some missunderstandings
> regarding the access to the filesystem. i hope i cleared it out a little bit
> now.
>   
Your English is very good.


------------------------------------------------------------------------------
The NEW KODAK i700 Series Scanners deliver under ANY circumstances! Your
production scanning environment may not be a perfect world - but thanks to
Kodak, there's a perfect scanner to get the job done! With the NEW KODAK i700
Series Scanner you'll get full speed at 300 dpi even with all image 
processing features enabled. http://p.sf.net/sfu/kodak-com