> Just thought I'd share this observation using 2.0.0...
>
> I ran a modified TestSender and put 50,000 messages into a single queue
> without having TestReceiver pick them up. Each message in the
> store/router1/persistent was 286 bytes. This means that those message
> should have consumed roughly 14.4MB of disk space.
>
> However, because they are stored as separate files, the actual
> consumption
> was 204MB, over 14 times the actual message space. This is because
> Linux
> uses 4096 bytes at a minimum when storing a file. I would guess that
> my
> scenario may not be all that realistic for application messages, but
> it's
> cases like this where a database would likely be much more efficient
> spacewise. (I won't even compare the speed issue, though Linux does
> get
> bogged down inode-wise when this many files exist in a single
> directory, but
> I know you guys are looking into that already.)
Well, usully a DBMS (like Sybase) needs a big file to store its databases.
And this file does not shrink if a database becomes emtpy. There is also
much space needed for indexing the keys, transaction log etc. But storage
isn't the problem, I think. ;-)
> This was run on Redhat Linux 6.2.
>
> On a bright note, it stored 50,000 messages without the receiver up,
> and
> when I started it, the receiver got al 50,000 messages.
I don't know the exact shell command to get the number of free/available
inodes, but some Unix systems (SCO I guess) have a limit of 65535 inodes.
> Great job!
> When
> will you offer support contracts?
Soon. We're just taking some breath and then we start to create the
infrastructure for that.
--
Andreas Mueller, [EMAIL PROTECTED], IIT GmbH, Bremen/Germany, http://www.iit.de
SwiftMQ - JMS Enterprise Messaging System, http://www.swiftmq.com
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