Re: [Quickfix-developers] Persisting unprocessed messages

[Michael C. S. <hik...@gm...>]

If the service can not be depended upon to honor a resend request it's not
a FIX service and nothing you do on the client side will guarantee against
lost data. Unless a TCP socket is closed cleanly you can still lose data. A
network card fails for example.

What if you persisted the sequence number of the last message processed at
the application layer? Then you know which messages to ignore on a replay.
Having the application separately be able to detect a duplicate message
would be a double safeguard in case the app crashed after processing but
just before persistence.
On Mon, May 23, 2016 at 4:41 PM Viktor Pogrebnyak <pohrebnyak@i.ua> wrote:

> QuickFIX Documentation: http://www.quickfixengine.org/quickfix/doc/html/
>
> Hi,
>
> The whole purpose of ResendRequest message is to retrieve messages that
> weren't processed by the client even when it received them. If service does
> not keep track of the messages being sent + lacks replay capability then
> you
> are in a big trouble, unfortunately. In your case client must not only
> remember which messages it received but also which were actually processed.
>
> Cheers,
> Viktor
>
>
>
> --
> View this message in context:
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> Sent from the QuickFIX - Dev mailing list archive at Nabble.com.
>
>
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