Re: [Quickfix-developers] Configuration Failover Settings

[Jon D. <jd...@wi...>]

I understand about having the same SenderCompID's. SenderLocationID can be
used instead of the SenderCompID to indentify the source of the message.

But in the case of a failover, won't sequence numbers be an issue?
If the failover server sequence numbers for a client were higher than what
the client was at, wouldn't there be a possiblity of a resend or locking
the client out until the sequence numbers caught up?

jd

> John,
>
> When you have multiple connection points that share the same comp id's,
> cycling through the connections is a necessity because you can't keep
> the same session alive simultaneously on multiple hosts/ports.  But if
> you failover sessions with unique compids and unique sets of sequence
> numbers, why would you not just keep these connections up at all times?
>
> --oren
>
> On Jun 9, 2004, at 10:46 AM, Jon Dahl wrote:
>
>> QuickFIX Documentation:
>> http://www.quickfixengine.org/quickfix/doc/html/index.html
>> QuickFIX FAQ: http://www.quickfixengine.org/quickfix/doc/html/FAQ.html
>>
>> I have been asked to research QuickFIX's scalability/failover
>> capabilities
>> by our Ops center and have come upon an issue. I think I found a
>> situation
>> where the clients won't be able to connect to an alternate gateway in
>> case
>> of a failure.
>>
>> Let's say a client has two hosts(gateways) to connect to. Each one has
>>  a
>> separate SenderCompID. If the client detects a failure and tries to
>> connect to the secondary host, it will fail to connect because its
>> TargetCompID is for the primary host and not the secondary one.
>>
>> I was wondering if there was a way to have the [SESSION] settings have
>> alternate TargetCompID's to go a long with SocketConnectPort[n] and
>> SocketConnectHost[n]?
>>
>> JD
>>
>>
>>
>>
>>
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-- 
Jon Dahl
jd...@wi...