Jim Lawrence
accessd at shaw.ca
Fri Feb 10 17:46:21 CST 2012
Stuart: RDBMS has always been logical and easy to learn. (The concept not necessarily the application.) OTOH the NoSQL systems fills a gap in database requirements (Explained in a previous post). Recommending banks of SSDs cards to leverage RDBMSs so they will come close to equaling map-reduce/distributive performance using the current most expensive solution to give SQL DBs the ability to compete against some cheapest solutions, seems like madness to me. I know this fellow in town who is doing some playing in his basement with a MondoDB(?) distributive database. He literally scavenged a dozen old computer boxes on the way to the Salvation Army recycling bins and assembled a pretty fair database system. (Very fast he says.) It is flaky as all get out and there are a number of issues to resolve but he is working with discarded junk and he has no idea what he is doing but that is this month. (His only costs are going to be electricity and grey hairs.) Jim -----Original Message----- From: dba-tech-bounces at databaseadvisors.com [mailto:dba-tech-bounces at databaseadvisors.com] On Behalf Of Stuart McLachlan Sent: Friday, February 10, 2012 3:26 AM To: Discussion of Hardware and Software issues Subject: Re: [dba-Tech] NoSQL is a movement not so much a choice or a technology An alternative view: http://www.simple-talk.com/sql/database-administration/relational-databases- and-solid-state- memory-an-opportunity-squandered/ <quote>The relational model was devised long before computer hardware was able to deliver an RDBMS that could deliver a fully normalized database with no performance deficit. Now, with reliable SSDs falling in price, we can reap the benefits, instead of getting distracted by NOSQL with its doubtful compromise of 'eventual consistency'.</quote> -- Stuart On 9 Feb 2012 at 9:15, Jim Lawrence wrote: > These new structures are making us reassess the way we define data. The > rules of ACID (Atomicity, Consistency, Isolation, Durability) no longer > apply, at least not in the way we have learned or have been taught. The new > rules can be described as CAP (Consistency, Availability, > Partition-tolerance). > _______________________________________________ dba-Tech mailing list dba-Tech at databaseadvisors.com http://databaseadvisors.com/mailman/listinfo/dba-tech Website: http://www.databaseadvisors.com