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Wayne <wayne@xxxxxxxxxxxxxxx> said:
> >> The only real reason to even use DR is if the number of packets in/out
> >> exceeds what a gigabit connection can handle. But at what point does that
> >
> >Or my case described above.
> >
> >> happen? I've personally seen a cluster of ~140 real-servers behind an F5
> >> BigIP with gigabit interfaces that was handling > 20 megabytes/sec
sustained
>
> Do you know F5 BigIP is just a PC, used to be PII400 processor running
> BSDI? What those commercial load balancer can do better than LVS just
> the marketing propaganda from those "commercial" company, since they
> have share holder's money to burn. If someone trying to sell those products
> in this LVS discussion group, it will not help the sales.
Of course I know this. You misunderstand. I am not trying to sell anyone on
F5 products. I -use- LVS on systems which I manage. My mention of the
commercial boxes was to illustrate my point that for most applications, NAT
is a perfectly acceptable load-balancing solution. The BigIP uses NAT. I've
seen that particular NAT box handling very high loads.
(NAT != bad)
I will note however that I also design and build systems for clients,
including clusters, and I recommend solutions based upon what I determine is
the best for the client.
For instance I'm working up the spec on a new cluster for a client who won't
have anyone on staff who can manage an LVS system, therefore they would have
to always rely upon a hired gun consultant (such as myself) to manage their
directors. This, in my opinion, is not the best situation for me to place
this client in, because the client is outside the US and I am inside the US.
On the surface, it would seem to be better for -me- and my consulting company
if I were to put the client in this position, but that is not how I have
built up my loyal client base. My clients know that I will keep -their- best
interests in mind while I am taking their money. And that is what is really
best for me, to have customers who trust me and who also recommend me to
others.
Since my evaluation indicates that this customer would be better served by a
commercial solution because they would then have the support of the vendor,
and would be able to rely upon that support in case of emergency, I'm
recommending -for that client- a commercial solution. To be specific, in this
case, I'm recommending the Radware WSD. Why? Well, it's got specific features
that will work well in this application and it's very simple to manage. It
will be easy for the administrators at this company to take real-servers out
of rotation and they will have vendor support for upgrades and
troubleshooting. It's the best solution for this client.
I'm not a salesman for any company, I'm a paid consultant. Due to this I have
to keep up on the current vendor offerings, and I have to always evaluate
what solution is best in any given situation. Dogma is bad for my business.
-=dwh=-
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