I can definitely see your need. I know Heroku offers this kind of service, if you don't mind using Rails :-)
On Apr 9, 1:41 pm, Marcel Overdijk <marceloverd...@gmail.com> wrote: > Hi Micheal, > > Just 1 db is fine enough for me. > I would choose a cloud platform because I don't want to maintain the > hardware myself and install os, application server etc. > Or even worse have to put up another application server and have to > load balance it. > > That's why I like the elasticity of the Cloud. If I would more > resources, cpu etc. I will pay for it. > Again 1 db is fine enough, in most web applications I have seen so far > the application server and web servers are clusters but there is > always just 1 db. > > So why not support e.g. MySQL as relational database within GAE? ;-) > I agree a relational database is a very sophisticated technology. > That's why so many people like it! > That's also why Amazon support both SimpleDB and e.g. MySQL I guess. > They had the same questions. > > Whatever hosting environment you choose (shared hosting or nowadays > cloud, ...) a relational database is always supported (and used by > many people). > I don't agree with your statement "That is why folks like Microsoft > and Sun are willing to offer relational databases as part of their > cloud platforms. There is almost no chance that any customer will > actually need this." > > Cheers, > Marcel > > On 9 apr, 19:55, michaelg <mike...@gmail.com> wrote: > > > Horizontal scaling of relational databases is non-trivial and Google > > does not offer it. I can't say if they have something internally that > > could work for some people, but it is such a tricky subject that it > > would be hard to offer a general purpose, turnkey solution. As an > > example, Google donated Hibernate Shards, a layer on top of the > > popular Hibernate ORM that is designed to work with a horizontally > > scaled database. They released this two years ago and it has been > > sitting and rotting ever since. > > > However, very few applications actually need a horizontally scaled > > database. That is why folks like Microsoft and Sun are willing to > > offer relational databases as part of their cloud platforms. There is > > almost no chance that any customer will actually need this. And > > chances are that a customer that did need this would probably be well > > past the stage where they would want to use a cloud platform > > anyways... > > > As for Amazon, MySQL running on EC2 is not a horizontally scaled > > database. It is a vertically scaled database (i.e. you can make the > > box it runs on bigger, but it is still one DB on one box, plus maybe > > some read slaves.) Again, this is perfect for the vast majority of > > applications. Amazon's SimpleDB is very similar to Google's DataStore. > > It is not relational, but it will scale horizontally. It has many of > > the same restrictions and downsides that DataStore > > has:http://highscalability.com/current-pros-and-cons-list-simpledb > > > Finally, make no mistake that there is no substitute for a relational > > database. RDBMS is very sophisticated technology. There are decades of > > complex mathematics and computer science behind it. Things like joins, > > views, ACID transactions, and integrity constraints are easy to take > > for granted, but not so easy to reproduce/reinvent. Many applications > > can greatly benefit from these standard features of most relational > > databases. Weighing the simplicity and scalability of GAE DataStore > > vs. the benefits of a relational database is one of the most critical > > factors in picking a cloud platform. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to google-appengine@googlegroups.com To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en -~----------~----~----~----~------~----~------~--~---
