Hi Jim,


I am not sure if Coherence is as flexible as your dream DB, but, as a
storage mechanism, it is more powerful, flexible and resilient than
you are giving it credit for. I believe there must be something to
learn from them in this area. E.g.: they got very good at handling/
reducing latencies and making their server working in a very efficient
peer to peer way.

As I mentioned before, my knowledge about Coherence is not very deep
and it is fragmented, but I read / ear consistently good/excellent
things about them for quite a few years already.

Again (repeated from my previous post), take a look at:
http://www.theserverside.com/news/thread.tss?thread_id=39186


BTW: I didn't really mean you were seducing Oracle. Just pulling your
leg.
=:o)


Have fun,
Paulo Gaspar

On 2008-06-19, at 22:00, Jim Starkey wrote:

> Paulo Gaspar wrote:
>> Hi,
>>
>>
>> That IBM product looks very similar to Oracle's (previously
>> Tangosol's) Coherence.
>>
>> Being a Java man, I am sure Mr. Jenks must have eared about it,
>> especially because Cameron Purdy (Tangosol founder) is widely known
>> and respected by the Java Open Source community.
>>
>>
>> Since the beginning of this thread (yes, Paul and Jim, keep it
>> coming)
>> Coherence keeps popping in my mind and I already created a "New mail
>> message" a few times to post something about it... just to quit
>> before
>> making sure of some details about it (ACID) which could invalidate
>> it.
>>
>> Now that I did my home work and that Mr. Jenks went the Object Grid
>> way, I must say that Coherence's success is the market's proof that a
>> decent implementation Jim's idea would be very well received.
>>
>> Actually:
>> - Jim, are you trying to build something Oracle would by? I mean,
>> after being bought by MySql, what's next?
>> =;o)
>>
> You know, Oracle didn't quite make my short list of companies that I
> really like. I got to spend a fair bit of time with Ken Jacobs at
> MySQL User Conferences (he is either Heikki's daemon or minder).
> Nice,
> decent guy. Ellison, well, I don't think so.
>
> But I'm not worrying about that at the moment. I'm building
> technology. We'll see where it takes me. I've got a nice 19" rack, 5
> quad-core 1U servers, a KVM, and a gigabit switch. What else could a
> geek want?
>> Just talking about Social Sites was a bad disguise: Social Sites can
>> mostly live without a database. Memcache, some persistent hash tables
>> and a text search system like Solr are enough for most of its needs.
>>
> That's true. They're the one segment of the Web 2.0 world that
> doesn't
> care about ACID. Funny, though, they're also the one segment of the
> Web
> 2.0 world that uses MySQL. Hmmm....
>>
>> One of my friends works for Oracle. Whenever he starts bragging about
>> how wonderful Coherence is to scale out Oracle databases I ask him:
>> - Can I still use SQL everywhere?
>>
>> From his face, I am far from being the first one asking this
>> question.
>>
> I'd never heard of it until you mentioned it. Not exactly a database
> product, is it? Hard to say exactly what it is, actually.
>>
>> Oracle certainly bought Coherence because many of their richest
>> customers missed some way to seriously scale out their databases. But
>> I am sure many are now missing SQL on top of it.
>>
>>
>> Database Clusters? Those seem to be something that many DBAs love to
>> hate. Their scalability is limited, unlike the cost and shared
>> storage
>> troubles.
>>
> Clusters, grids, clouds. Similar, but different. I think these are
> generally accepted definitions:
>
> * Cluster: General fixed size, managed as a unit, homogeneous, no
> security within cluster
> * Grid: Specialized servers, heterogeneous, non-trusting
> * Cloud: Elastic, heterogeneous, self-managing
>
> To me, the cloud is the exciting platform. It's elasticity and
> flexibility would make it too hard to manage by humans, so it has
> manage
> itself. I like that.
>
> I don't know if I mentioned, but the official rejected slogan of
> NimbusDB, Inc., is "Where ACID reigns."
>
> --
> James A. Starkey
> President, NimbusDB, Inc.
> 978 526-1376
>
>
>
> [Non-text portions of this message have been removed]
>
>
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