specs for running 35 machines

Gavin McCullagh gmccullagh at gmail.com
Thu Aug 16 08:32:17 UTC 2007


On Thu, 16 Aug 2007, David Trask wrote:

> two same or slighly lesser servers running in dhcp failover/load balancing
> mode.....

> If one server fails....no biggie....the other will take over until it
> comes back online.
> What I run at my school....
> Two Dual Xeon servers with 4gb RAM and fast SCSI HD's (15k rpm) with
> gigabit ethernet to gigabit switches.  These servers are running in the
> dhcp failover/load balance mode I mentioned above.  

Our of curiosity, where do you store users' home directories?  Are they
stored on a third NAS machine or do you have some sort of data mirroring
between the servers?  

One could easily fall into the trap of having them on one server, nfs
mirrored to the other.  This is not bad, except that the servers aren't
really redundant then as if the server with the home directories goes down,
the other one might as well be down.  

It might be good enough for most people to simply rsync the data from one
server to another each night and lose the day's data in the event of such a

I've often wondered about good "redundant network filesystem" solutions
which would address this, ie having the data stored live on both servers,
read-write so that either server could go down and service would continue.
I know they exist, but it seems quite messy.


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