Support Forums: Message List - Interview with Klaus Wuestefeld, founder of Prevayler http://www.theserverside.com Most recent forum messages en Jive Forums Silver 5.5.30 (www.jivesoftware.com) Sat, 18 May 2013 23:25:15 -0400 BDBJE x Prevayler http://www.theserverside.com/discussions/thread.tss?thread_id=30735 I've just found out that BerkeleyDB Java Edition (BDBJE) provides implementations of Map, SortedMap and Iterator backed by a BDB database (which has ACID transactions and such).Prevayler uses a jva.util.HashMap to store all of its data in...]]> Fri, 03 Jun 2005 06:34:44 -0400 Fri, 03 Jun 2005 06:34:44 -0400 Fri, 03 Jun 2005 06:34:44 -0400 Jun 3, 2005 Bjorn Blomqvust 0 BDBJE x Prevayler http://www.theserverside.com/discussions/thread.tss?thread_id=30735 I've just found out that BerkeleyDB Java Edition (BDBJE) provides implementations of Map, SortedMap and Iterator backed by a BDB database (which has ACID transactions and such).Prevayler uses a jva.util.HashMap to store all of its data in...]]> Fri, 03 Jun 2005 06:33:55 -0400 Fri, 03 Jun 2005 06:33:55 -0400 Fri, 03 Jun 2005 06:33:55 -0400 Jun 3, 2005 Bjorn Blomqvust 0 BDBJE x Prevayler http://www.theserverside.com/discussions/thread.tss?thread_id=30735
Prevayler uses a jva.util.HashMap to store all of its data in memory,...]]> Sat, 07 May 2005 15:03:19 -0400 Sat, 07 May 2005 15:03:19 -0400 Sat, 07 May 2005 15:03:19 -0400 May 7, 2005 Elifarley Coelho 2 Partitioning http://www.theserverside.com/discussions/thread.tss?thread_id=30735 So lets say I have 10 instances of prevayler setup in a partition scheme on 10 physical systems. Now, if each partition is absolutely isolated from the others and no data is replicated, consistency is fairly straight forward. Let's say I want...]]> Sun, 09 Jan 2005 12:01:57 -0500 Sun, 09 Jan 2005 12:01:57 -0500 Sun, 09 Jan 2005 12:01:57 -0500 Jan 9, 2005 Klaus Wuestefeld 0 Overly simplistic http://www.theserverside.com/discussions/thread.tss?thread_id=30735 I'm not sure which definition of ACID or consistency you're talking about.The issue of Consistency is a simple one, I believe: Transactions must be Consistent. So that transactions can be Consistent in an RDBMS,...]]> Sat, 08 Jan 2005 21:36:33 -0500 Sat, 08 Jan 2005 21:36:33 -0500 Sat, 08 Jan 2005 21:36:33 -0500 Jan 8, 2005 peter lin 0 Consistency http://www.theserverside.com/discussions/thread.tss?thread_id=30735
There is a lower level of consisistency which is just as important. In a nutshell, it states that if a...]]> Sat, 08 Jan 2005 16:29:21 -0500 Sat, 08 Jan 2005 16:29:21 -0500 Sat, 08 Jan 2005 16:29:21 -0500 Jan 8, 2005 Mike Spille 0 Consistency http://www.theserverside.com/discussions/thread.tss?thread_id=30735 I'm not sure which definition of ACID or consistency you're talking about.
The issue of Consistency is a simple one, I believe:

Transactions must be Consistent.

So that transactions can be Consistent in an...]]> Sat, 08 Jan 2005 15:35:33 -0500 Sat, 08 Jan 2005 15:35:33 -0500 Sat, 08 Jan 2005 15:35:33 -0500 Jan 8, 2005 Klaus Wuestefeld 2 ACID http://www.theserverside.com/discussions/thread.tss?thread_id=30735 In other words, the definitive "Consistency" in ACID is still up to the application.Do you agree, or am I just twisting words around again?
I'm not sure which definition of ACID or consistency you're talking about....]]> Fri, 07 Jan 2005 13:50:50 -0500 Fri, 07 Jan 2005 13:50:50 -0500 Fri, 07 Jan 2005 13:50:50 -0500 Jan 7, 2005 peter lin 4 ACID http://www.theserverside.com/discussions/thread.tss?thread_id=30735
First, a database provides things such as constraints (not null, FK, PK, etc) in a centralized and declarative manner which is easy to see...]]> Fri, 07 Jan 2005 13:48:19 -0500 Fri, 07 Jan 2005 13:48:19 -0500 Fri, 07 Jan 2005 13:48:19 -0500 Jan 7, 2005 Mike Spille 0 ACID http://www.theserverside.com/discussions/thread.tss?thread_id=30735
That even allows for TheMostScalableArchitecture:http://www.prevayler.org/wiki.jsp?topic=TheMostScalableArchitecture
In...]]> Fri, 07 Jan 2005 13:15:58 -0500 Fri, 07 Jan 2005 13:15:58 -0500 Fri, 07 Jan 2005 13:15:58 -0500 Jan 7, 2005 Klaus Wuestefeld 6 API Javadoc http://www.theserverside.com/discussions/thread.tss?thread_id=30735 ...factual description of exactly what the product does and doesn't do in bullet points, pros/cons of the product...
I agree. The javadoc doesn't always give a good overview.

See you, Klaus.]]> Fri, 07 Jan 2005 11:14:41 -0500 Fri, 07 Jan 2005 11:14:41 -0500 Fri, 07 Jan 2005 11:14:41 -0500 Jan 7, 2005 Klaus Wuestefeld 0 real-world http://www.theserverside.com/discussions/thread.tss?thread_id=30735 Fri, 07 Jan 2005 11:12:54 -0500 Fri, 07 Jan 2005 11:12:54 -0500 Fri, 07 Jan 2005 11:12:54 -0500 Jan 7, 2005 peter lin 0 API Javadoc http://www.theserverside.com/discussions/thread.tss?thread_id=30735
Hi Peter,Have you read the Prevayler API javadoc?See you, Klaus.
In the past yes, but not recently. As much as i love javadocs, I strongly believe in having well written documentation that isn't just a description of...]]> Fri, 07 Jan 2005 09:49:26 -0500 Fri, 07 Jan 2005 09:49:26 -0500 Fri, 07 Jan 2005 09:49:26 -0500 Jan 7, 2005 Bob Dionne 1 API Javadoc http://www.theserverside.com/discussions/thread.tss?thread_id=30735 Hi Peter,Have you read the Prevayler API javadoc?See you, Klaus.
In the past yes, but not recently. As much as i love javadocs, I strongly believe in having well written documentation that isn't just a description of each...]]> Fri, 07 Jan 2005 09:01:46 -0500 Fri, 07 Jan 2005 09:01:46 -0500 Fri, 07 Jan 2005 09:01:46 -0500 Jan 7, 2005 peter lin 3 ACID http://www.theserverside.com/discussions/thread.tss?thread_id=30735
from what (little) I know of Prevailer:

- Atomicity: since prevailer just calls the Transaction object, it is the coder's job to guarantee that either all or none operations inside a Transaction executes. and since it is in the...]]> Fri, 07 Jan 2005 07:11:09 -0500 Fri, 07 Jan 2005 07:11:09 -0500 Fri, 07 Jan 2005 07:11:09 -0500 Jan 7, 2005 Henrique Steckelberg 0