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Op 14-10-2010 12:33, Graeme Fowler schreef:
>> On Thu, 2010-10-14 at 10:32 +0200, Dirk Bonenkamp - Bean IT wrote:
>>> I'm having some trouble with https over LVS-NAT. In short: it works, but
>>> it is slow. Much slower than http.
>> <snip>
>>> Any ideas on what I'm missing here..?
>> Possibly.
>>
>> Are all of your machines in this testbed connected to the same switch?
>> Does the director have two separate NICs with the ranges on, or one?
>>
>> In an idealised environment where the three machines are connected
>> together as simply as possible it's quite likely that you'll "stack"
>> small latency figures which quickly add up to what might look like a
>> significant delay. However, it might not be that significant - if all of
>> your machines are connected via 100 megabit or gigabit ethernet, that's
>> unlikely to reflect the situation with the actual clients who will be at
>> the far end of a long piece of wet string.
>>
>> Obviously there is an overhead with connecting via the director,
>> especially if it's only got a single NIC - but you might need to explain
>> your testbed a little more clearly first.
>>
> Thank you for your reply.
>
> My setup:
>
> The directors VIP is on eth0, eth0 is connected to a 100 megabit switch.
> The directors gatewayIP is on bond0, which is a mode 4 bonded interface
> (eth1 & eth3). bond0 is connected to a stacked gigabit switch (each
> interface to a different switch).
>
> The realserver is connected to the same gigabit switches with a mode 4
> bonded interface (eth0 & eth1).
>
> Because the testing through the VIP goes over a 100 megabit switch, I've
> also connected a 100 megabit switch to the gigabyte switch. The
> 'internal' test machine is connected to this switch, so both test a
> through one 100 megabit switch.
>
> I just redid the tests with the same machine (I previously tested with 2
> different test machines). I've also included figures for a single
> machine, online, with the same apache setup (we are on a 2 megabit
> connection).
>
> Direct on RS Director Online
> http 0,025 s 0,06 s 0,2 s
> https 0,7 s 4,7 s 2,8 s
>
> Looks to me like https through the LVS director is too slow, and I
> probably misconfigured something... Hope this gives the gurus some more
> insight.
>
> Thanks, Kind regards,
>
> Dirk
Well, I managed to fix this issue. I rebuild my setup to use LVS-DR,
with the director(s) as gateway (using the accept_local method).
Speed is now much more what I expected and comparable with a stand alone
server.
I still don't know what exactly the problem was with LVS-NAT...
Kind regards,
Dirk
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