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From Saminda Wijeratne <samin...@gmail.com>
Subject Re: Jackrabbit vs OpenJPA
Date Wed, 04 Dec 2013 19:29:44 GMT
+1. Thats a very good idea Chris. I think we have some performance numbers
as well to back our facts.


On Wed, Dec 4, 2013 at 11:12 AM, Chris Mattmann <mattmann@apache.org> wrote:

> Thanks Saminda. My point was maybe grabbing that text below and then
> sending to dev@jackrabbit.a.o and/or user@jackrabbit.a.o and letting
> them know they may be able to help you guys.
>
> Cheers,
> Chris
>
>
>
> -----Original Message-----
> From: Saminda Wijeratne <samindaw@gmail.com>
> Reply-To: "dev@airavata.apache.org" <dev@airavata.apache.org>
> Date: Wednesday, December 4, 2013 11:09 AM
> To: "dev@airavata.apache.org" <dev@airavata.apache.org>
> Subject: Re: Jackrabbit vs OpenJPA
>
> >Adding to what Raman said, we noticed a exponential-like drop in
> >performance when extracting the data from a JackRabbit repository when
> >adding more and more data. JackRabbit was chosen earlier because we
> >wanted to persist the descriptors for the gateway.
> > No of descriptors in the repository did not grow over time (other than
> >occasional new descriptor when needed). Then we wanted to persist the
> >workflow template (which can be a large document) and the experiment
> >results. Issue was that experiment results grow
> > over time and we noticed the exponential increase in data retrieval time
> >to a point noticeable to a user (eg: XBaya would just freeze).
> >
> >
> >Thus we started experimenting with using direct use of RDBMs instead and
> >found it did not become slow drastically and had more control over
> >picking and choosing the exact data to retrieve.
> >
> >
> >
> >
> >
> >
> >
> >On Wed, Dec 4, 2013 at 8:00 AM, Chris Mattmann
> ><mattmann@apache.org> wrote:
> >
> >Hey Guys,
> >
> >May be worth passing some of that along to the JackRabbit community?
> >
> >Cheers,
> >Chris
> >
> >
> >
> >-----Original Message-----
> >From: Raminder Singh <rsandhu1@gmail.com>
> >Reply-To: "dev@airavata.apache.org" <dev@airavata.apache.org>
> >Date: Wednesday, December 4, 2013 7:50 AM
> >To: "dev@airavata.apache.org" <dev@airavata.apache.org>
> >Subject: Re: Jackrabbit vs OpenJPA
> >
> >>
> >>
> >>
> >>Hi Sachith,
> >>
> >>
> >>Airavata requirement was to persist job descriptors, state, metadata etc.
> >> We saw lot of over head using Jackrabbit, may be lot of
> >>serialization/de-serialization going on. Jackrabbit is good for content
> >>repository/management but when we were try to access
> >> the content from remote machines using RMI protocol, it was really
> >>getting slow.  Lahiru may have more details about this.
> >>
> >>
> >>Thanks
> >>Raminder
> >>
> >>On Dec 4, 2013, at 3:11 AM, Sachith Withana <swsachith@gmail.com> wrote:
> >>
> >>
> >>Hi all,
> >>
> >>
> >>Can someone please explain to me why you made the switch from Jackrabbit
> >>to OpenJPA?
> >>I'm curious of why you did that.
> >>
> >>
> >>--
> >>Thanks,Sachith Dhanushka Withana
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >
> >
> >
> >
> >
> >
> >
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