Dave Kitabjian wrote:
>
> We will be bringing a couple more Radiators online to work in parallel
> to our main one. I could use some guidance here:
>
> 1) logfile - Since they all write atomically, could they all share the
> same logfile if it resides on a common NFS volume? Is there a non-NFS
> way to do this?
Explore using syslog to do the logging from Radiator. Syslog is designed
to do the type of multi-system/cross-system logging you're asking about.
Be sure you enable the syslog daemon on the receiving system to listen
on the syslog port for incoming data (newer systems ship with this
disabled, since folks were causing DoS attacks by flooding peoples'
syslog daemons. Be sure you've firewalled your logging server from the
outside world!).
>
> 2) SessionDatabase - To have them all share the same SessionDatabase
> (which is the only useful scenario, right?), the DB would also have to
> sit on something in common like NFS? Other options?
A shared SQL server would do nicely.
>
> I believe my boss will not want the NFS option because it will create a
> single point-of-failure, defeating much of our purpose behind having
> multiple servers. Any comments?
I recommend against NFS in general, as file locking and contention
issues have been problematic in cases. Using Syslog for logging, and
SQLNet or similar for your session database will help.
Sooner or later, you'll need to have a common authentication database.
That might be replicated across servers, or on a common server. Same
goes for logging and session database.
A common way to deal with the issues is to use simple servers to run
Radiator (i.e. CPU, memory, some disk), then have a beefier machine for
your database (perhaps multiple processors, RAID array, etc.).
--
-----------------------------------------------------------------
Daniel Senie [EMAIL PROTECTED]
Amaranth Networks Inc. http://www.amaranth.com
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