Re: RHEL 5.2 -> Sun 2540 Fibre Disk Array

[Andrey Meganov <a.meganov@xxxxxxxxx>]

You are right. However, there is one issue. GFS "does not" like  
metadata intensive workload, i.e. lots of small files in a flat  
dirextory structure. A lot of intercluster locking communication will  
eat your performance.

This should be one of the improvements, introduced with GFS2, which is  
still a tech. preview.

I suggest you try things out, but you might end up preferring NFS.  
Sell one of the FC cards for a beer. ;)) lots of beer.

Regards,
Andrey

Sent from my iPhone as I am away from office


On 02.10.2008, at 6:56, "Sanjay Chakraborty" <sanjaychakrab@xxxxxxxxx>  
wrote:

> You need cluster file system like GFS. ext3 file system will crash if
> same lun is mounted from different servers.
>
> 2008/10/1 Ryan Golhar <golharam@xxxxxxxxx>:
> > Hi,
> >
> > I'd like to get some opinions before I venture on this.  I have a  
> > couple of
> > Sun servers running RHEL 5.2.  They all have fibre cards and are  
> > connected
> > to a Sun 2540 Fibre Disk Array.  I've allocated a chunk of disk  
> > space space
> > on the SAN to be used for /home.
> >
> > Previously, I would have set up an NFS server and mounted /home  
> > from the
> > other servers.  But now, that everything is connected directly to  
> > the SAN I
> > could mount /home directly without using NFS.
> >
> > Is this possible or am I still going to need an NFS server to  
> > control access
> > to /home?  The more I think about it, the more it worries me  
> > because /home
> > is a logical volume.  Can I have all the servers accessing this  
> > partion at
> > the same time?  If I can't have all the machines mount /home  
> > directly from
> > the SAN, then that sort of defeats the purpose of having the SAN  
> > for /home,
> > IMO.
> >
> > What would be the best way for setting this up?
> >
> >
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>
> --
> Regards.
> Sanjay Chakraborty
>
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