04-11-2007
Properly Sizing an x86 Server for Internet DNS?
Where I work, we have to very old Alpha boxes running OpenVMS 7. They also have Multinet and are using the BIND component for DNS services. We are planning on retiring those boxes and replacing them with x86 servers running Linux. I've decided to go with Gentoo Linux for this and I've inherited two old boxes (A PIII >1GHz system and an old PIII quad Xeon 500MHz system) to do this with.
My concern is that my co-workers are adamant that the x86 systems won't be able to to keep up with the demand (we host about 70 domains in DNS) the way the Alphas did. My suspicion is that these x86 systems are just fine. However, what I really want to know is where the real utilization for DNS comes in. Is it CPU heavy? Is it RAM heavy? Or is it I/O heavy? I would suspect RAM first and CPU second based on what I've seen at home. But to be honest, in my experience DNS has been a pretty low resource service to run.
I honestly don't see our organization as being that big and 70 domains seems like a very small load even for the PIII boxes I just got. But, I'd be happy with any insight anyone here can provide.
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LEARN ABOUT DEBIAN
avahi-browse-domains
avahi-browse(1) General Commands Manual avahi-browse(1)
NAME
avahi-browse - Browse for mDNS/DNS-SD services using the Avahi daemon
SYNOPSIS
avahi-browse [options] service-type
avahi-browse [options] --all
avahi-browse [options] --browse-domains
avahi-browse [options] --dump-db
avahi-browse-domains [options]
DESCRIPTION
Browse for mDNS/DNS-SD network services and browsing domains using the Avahi daemon.
OPTIONS
Specify a DNS-SD service type (e.g. _http._tcp) to browse for on the command line, or -a to browse for all available service types. Items
that appear on the network are prefixed with "+", items that disappear are prefixed with "-". If --resolve is passed items that are
resolved are prefixed with "=".
-a | --all
Browse for all service types registered on the LAN, not just the one specified on the command line.
-D | --browse-domains
Browse for browsing domains instead for services. avahi-browse-domains is equivalent to avahi-browse --browse-domains
-d | --domain= DOMAIN
Browse in the specified domain. If omitted avahi-browse will browse in the default browsing domain (usually .local)
-v | --verbose
Enable verbose mode.
-t | --terminate
Terminate after dumping a more or less complete list.
-c | --cache
Terminate after dumping all entries available in the cache.
-l | --ignore-local
Ignore local services, show only remote services.
-r | --resolve
Automatically resolve services found.
-f | --no-fail
Don't fail if the daemon is not found running. Instead, wait until it appears. If it disconnects, try to reconnect.
-p | --parsable
Make output easily parsable for usage in scripts. If enabled fields are separated by semicolons (;), service names are escaped. It
is recommended to combine this with --no-db-lookup.
-k | --no-db-lookup
Don't lookup services types in service type database.
-b | --dump-db
Dump the service type database (may be combined with -k)
-h | --help
Show help.
-V | --version
Show version information.
AUTHORS
The Avahi Developers <avahi (at) lists (dot) freedesktop (dot) org>; Avahi is available from http://avahi.org/
SEE ALSO
avahi-publish(1), avahi-resolve(1), avahi-daemon(8)
COMMENTS
This man page was written using xml2man(1) by Oliver Kurth.
Manuals User avahi-browse(1)