[linux-lvm] HA Fileserver configuration recommendation sought.

Chris Croswhite csc at cadence.com
Fri Nov 19 17:27:47 UTC 2004

I use the ATABoy 2x (dual active/active FC) with great success.  I use
md to create a failover path (see mdadm) on newer kernels (2.6.9) and I
have multiple 3.2T LUNS (multiple ataboys).  I use LVM2 to partition
some of the LUNs with great success.

Too, if this is a heavily beat file server, I would highly recommend
using the 2.6.8+ kernel and grab what ever patches you can for knfsd and
networking.  Also look at proc/sys/vm/vfs_cache_pressure et al.

Best of Luck.

On Fri, 2004-11-19 at 01:47, Gary Mansell wrote:
> Dear all,
> I currently run RHAS3.0 on a Dell PE2650 which is directly attached to
> an EMC FC4500 2TB HW RAID 5 unit via two QLA2310F Fibre Channel cards.
> I have EMC's Powerpath software installed to give me multiple paths to
> the disk subsytem in case of controller or cable failure. 
> This configuration has served me well but is now about to be End Of
> Life'd by Dell and I need to grow the storage. There is obviously
> quite a price premium to pay for this sort of kit so I was hoping to
> find a cheaper solution for the future.
> I have seen the Nexsan ATABEAST which is a 16TB ATA array with dual
> fibre channel controllers. It seems to be well liked and is reasonably
> priced but my concern is how to achieve multiple paths to the disk.
> How would you recommend achieving a highly available configuration
> with this sort of disk subsystem?
> Also, am I correct in thinking that the maximum filesystem size with
> RHEL 3.0 is 2TB? Is it possible to get over this limitation with LVM
> or some other method?
> Any advice gladly received.
> Thanks in advance
> Gary Mansell -- 
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