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From Gary Tully <gary.tu...@gmail.com>
Subject Re: KahaDB enableJournalDiskSyncs
Date Thu, 08 Apr 2010 13:09:45 GMT
yea, I mean on the client producer size. batch up the sends with a
transacted session.

On 8 April 2010 11:20, Richard Holt <richard_holt@btopenworld.com> wrote:

>
> hi gary, thanks for that it was what i was expecting but the order of speed
> slowdown is vast. for a simple comparison our test ran to completion in 9
> minutes with this disabled and it was still running at 12 minutes with only
> approximately 1/2 of the messages completed at 12 minutes
>
> you mention transactions, how would i enable this functionallity to test, i
> see no mention of transactions except from the client producer side? or is
> this what you mean?
>
>
> Gary Tully wrote:
> >
> > That option enables a blocking fsync on every message enqueue as per the
> > spec durability requirement. With that option disabled, writes are
> > synced periodically in batches so in the event of a system crash is is
> > possible that an enqueue is not durable.
> > Using transactions is another way to avoid the fsync overhead on every
> > enqueue as it can be deferred till commit.
> >
> > On 8 April 2010 10:07, Richard Holt <richard_holt@btopenworld.com>
> wrote:
> >
> >>
> >> Hi,
> >>
> >> We have currently set this option to true however does this need to be
> >> enabled as the performance of the system decreases dramatically when set
> >> to
> >> true. The documentation on it just states that it is a jms requirement?
> >>
> >> We have a requirement for no message loss so whichever option provides
> >> for
> >> this we will have to use.
> >>
> >> Thanks In Advance
> >> --
> >> View this message in context:
> >>
> http://old.nabble.com/KahaDB-enableJournalDiskSyncs-tp28176017p28176017.html
> >> Sent from the ActiveMQ - User mailing list archive at Nabble.com.
> >>
> >>
> >
> >
> > --
> > http://blog.garytully.com
> >
> > Open Source Integration
> > http://fusesource.com
> >
> >
>
> --
> View this message in context:
> http://old.nabble.com/KahaDB-enableJournalDiskSyncs-tp28176017p28176613.html
> Sent from the ActiveMQ - User mailing list archive at Nabble.com.
>
>


-- 
http://blog.garytully.com

Open Source Integration
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