Re: Prevayler vs Terracotta

AVRO from the Apache Hadoop provides a fast compact binary  
serialization with a JSON descriptor up front so that you can resolve  
schema conflicts on the fly.

Not exactly 1.0 but a good idea and clearly going to be well supported.

http://hadoop.apache.org/avro/

R


On Nov 11, 2009, at 12:13 PM, Clebert Suconic wrote:

> Serialization sucks!
>
>
> Provide an alternate Marshalling API for users, and you will have a
> *much* better throughput.
>
>
>
>
> On Wed, Nov 11, 2009 at 1:38 PM, William Pietri  
> <[email protected]> wrote:
>> Ralph Johnson wrote:
>>
>> Prevayler does require you to hold all your objects in the JVM heap  
>> in
>> RAM. If you cannot do that, as you know, you cannot use Prevayler.
>>
>>
>> Do any of you have experience with 64 bit machines?  What is the
>> biggest Prevayler database you've seen?
>>
>>
>> A client, who does not use Prevayler but is using the hot-in-RAM  
>> approach,
>> has been using 64-bit machines with large JVMs quite happily. I  
>> think their
>> production machine had 16 GB of RAM, with talk of expansion.
>>
>> The problem with this approach, though, turns out to be read IO  
>> bandwidth
>> and object deserialization. Their startup times are on the order of  
>> 30
>> minutes.
>>
>> If anybody has interesting solutions (hardware or software) to the  
>> long
>> startup time problem, I'd love to hear about them, as I think that's
>> Prevayler's Achilles' Heel for scaling.
>>
>> William
>>
>>
>> ------------------------------------------------------------------------------
>> Let Crystal Reports handle the reporting - Free Crystal Reports  
>> 2008 30-Day
>> trial. Simplify your report design, integration and deployment -  
>> and focus
>> on
>> what you do best, core application coding. Discover what's new with
>> Crystal Reports now.  http://p.sf.net/sfu/bobj-july
>> _______________________________________________
>> To unsubscribe go to the end of this page:
>> http://lists.sourceforge.net/lists/listinfo/prevayler-discussion
>> _______________________________________________
>> "Databases in Memoriam" -- http://www.prevayler.org
>>
>>
>
>
>
> -- 
> Clebert Suconic
> http://www.jboss.org/developers/#ClebertSuconic
> http://clebertsuconic.blogspot.com
>
> ------------------------------------------------------------------------------
> Let Crystal Reports handle the reporting - Free Crystal Reports 2008  
> 30-Day
> trial. Simplify your report design, integration and deployment - and  
> focus on
> what you do best, core application coding. Discover what's new with
> Crystal Reports now.  http://p.sf.net/sfu/bobj-july
> _______________________________________________
> To unsubscribe go to the end of this page: http://lists.sourceforge.net/lists/listinfo/prevayler-discussion
> _______________________________________________
> "Databases in Memoriam" -- http://www.prevayler.org
>


------------------------------------------------------------------------------
Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day 
trial. Simplify your report design, integration and deployment - and focus on 
what you do best, core application coding. Discover what's new with
Crystal Reports now.  http://p.sf.net/sfu/bobj-july
_______________________________________________
To unsubscribe go to the end of this page: http://lists.sourceforge.net/lists/listinfo/prevayler-discussion
_______________________________________________
"Databases in Memoriam" -- http://www.prevayler.org