Re: keep a java program open

["Simon Coulter" <shc@xxxxxxxxxxxxxxxxx>]

Hello David,

>I don't know where you find this stuff, so I can't go look myself, but
>if you know off hand, I would be interested in whether the  the data
>queue sorted on every dequeue or only on a dequeue with when after an
>entry has arrived?

I 'know' this stuff 'cause I've seen some of the code -- a very long time
ago now I used to write parts of OS/400 for IBM.  I also had an involved
discussion with one of the developers when the RISC systems arrived
because the company I was working for at the time had a performance
problem due to filling the queue before starting the reader.  That's how I
know the timing of the sort changed.

I'm fairly sure the sort occurs only if new entries have arrived between
dequeue operations.

>Also, do you know whether the whole entry is sorted rather than just the
>key? Maybe that is why I could not recognize a difference between sorted
>data queues and a user index.

I believe the entire entry is moved around but the sort is performed only
on the key length.  I'd need to write code and play to be sure -- as I
said it's been a VERY long time.

Regards,
Simon Coulter.

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