Re: [Quickfixj-users] Rolling Message store?

[Brad H. <Bra...@gb...>]

I wonder how hsqldb with a cached table would compare in terms of
performance and reliability?  Should be able to plug it into the
existing jdbc store.  If you run hypersonic in embedded mode it wouldn't
add much system admin overhead over the file store.=20

Brad.=20

-----Original Message-----
From: qui...@li...
[mailto:qui...@li...] On Behalf Of
Steve Bate
Sent: Tuesday, 19 June 2007 4:13 AM
To: qui...@li...
Subject: Re: [Quickfixj-users] Rolling Message store?

QuickFIX/J Documentation: http://www.quickfixj.org/documentation/
QuickFIX/J Support: http://www.quickfixj.org/support/
> I suspect that for fix resend purposes i'll never need more than the=20
> last 10 minutes of messages. Is there a standard MessageStore=20
> implementation that either just forgets older messages, or a way of=20
> getting FileStore to roll old messages over (say every day)? This=20
> would allow old messages to be archived or deleted without affecting a
running app.

There's not a rolling file implementation for the message store.

> If not, would such a message store be a useful addition to the
codebase?
> I'm thinking of a MemoryStore with a time limit threshold, or a=20
> FileStore with various rolling configuration options similar to log4j.

I'm not sure how useful a rolling store would be. However, there's room
for improvement in the caching of the messages for resend. Currently,
the file store loads all messages into memory (using MemoryStore). That
can slow down server start time and can consume a lot of memory for
long, active sessions. Another option might be to use something like
JBossCache or EhCache (or similar) to store the messages with a backing
file but configure the cache to delete messages that are old than a
specified age. We would need to do some experimentation to be sure the
performance is good enough.

Steve


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