db servers separate hardware

[Antoine Verheijen]

Actually, I have found that the performance of DB services can suffer
when you do this. File server functions run at a higher priority than
the DB functions so that the machine will respond to file services
before it responds to DB services. This can slow things noticably if
the DBs are locked for synchinization and the file services happen to
be very active.

On Wed, Jun 13, 2001 at 02:32:35PM -0400, John W. Sopko Jr. wrote:
> We have 3 large db/file server machines, (200GB each), and have
> run db/file servers on the same machines for over 5 years without
> any issues. The admin guide implies if you have 3 or fewer machines
> run them both as a db and file servers:
> 
> "A simple file server machine runs only the server processes that store
> and deliver AFS files to client machines, monitor process status, and
> pick up binaries and configuration files from the cell's binary
> distribution and system control machines. 
> 
> In general, only cells with more than three server machines need to run
> simple file server machines. In cells with three or fewer machines, all
> of them are usually database server machines (to benefit from
> replicating the administrative databases); "
> 
> The admin gu
> 
> 
> Patty OReilly wrote:
> > 
> > Management wants to consolidate services where possible at our site. We
> > have always adhered to the recommended practice of keeping our Database
> > servers running vlserver, kaserver, ptserver and buserver on separate
> > machines from our Fileservers. Now they want us to consolidate these
> > services and run all AFS server processes on our Fileservers.
> > 
> > Does anyone have any information pro or con that could help us decide
> > whether consolidation of Fileservers and DBservers would be successful?
> > 
> > --patty
> 
> -- 
> John W. Sopko Jr.               University of North Carolina
> email: sopko@cs.unc.edu         Computer Science Dept., CB 3175
> Phone: 919-962-1844             Sitterson Hall; Room 135
> Fax:   919-962-1799             Chapel Hill, NC 27599-3175

-- 

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Antoine Verheijen                  Email: antoine.verheijen@ualberta.ca
CNS Network Services               Phone: (780) 492-9312
University of Alberta              Fax:   (780) 492-1729