Re: {bb} BBDISPLAY optimization?

[Jeff Stoner <leapfrog@freeshell.org>]

On Tue, 31 Aug 2004, PAUL WILLIAMSON wrote:

> BBOUT on any of my machines telling me there is a problem.  All purples
> are
> related to "special" network port tests performed.  They all work from
> the
> command line and occasionally they go back to green for a time (30
> minutes)
> after I restart the BBNET process on another server, but it looks like
> the
> BBNET may be the source of the problems.

> on why that happens.  I am trying to hold off installing bbgen until
> 3.0 is released,
> but I'd really rather get the stock bb working rather than put another
> piece on top to potentially mask the problem further.

The network tests are probably the most bothersome tests because of 
several reasons:

- they're all performed from a single server
- many are performed serially (one after another)
- any problems and you're probably at the mercy of the default network 
stack timeout for socket connections or DNS lookups (many times around 30 
seconds).

Some things you may want to consider going forward:

- use bbgen now (I'm sure the upgrade path isn't going to be bad)
- use multiple BBNET servers (I wrote an add-on to help with this endevor)
- where possible, use tests that support parallelism (the bb-network.sh 
master script has such a variable called NETTHREADS)
- re-write custom tests to work in parallel
- add shorter timeouts to tests
- tune network stack in your OS (if possible)
- where applicable, add 'testip' keyword to bb-hosts to avoid DNS lookups
- replace some classes of tests with more efficient monitoring methods 
(ie. instead of using BB to monitor a large number of ports, switch to 
something that uses nmap and integrate the output into Big Brother)

--Jeff

"Have you ever stopped to think: what if Einstein was off by one?"
--
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-==-=-=-=-=-=-=-=-=-=-=-=
To unsubscribe from this list, or to subscribe to the bb-digest list
send e-mail to mailto:majordomo@bb4.com with unsubscribe bb -and/or-
subscribe bb-digest in the BODY of the message.