Simple Image Based Persistence in Squeak

Giovanni Corriga giovanni at
Sat Jan 19 01:19:58 UTC 2008

Jon Hylands ha scritto:
> On Tue, 15 Jan 2008 14:02:14 +0100, Janko Mivšek <janko.mivsek at>
> wrote:
>> Why I like a concept of image as a database? Because it simply works, 
>> and that is my concrete experience. Also a fear of losing data is mostly 
>> baseless - a chance of losing data is very small, again from experience. 
>> So small that it is close to a chance of loosing of data on relational 
>> databases, I would say. That is a strong wording I know, but let we at 
>> least start thinking about this probability.
> One issue I have with image-based is it is all or nothing. I want to be
> able to make small incremental changes, and persist those changes.
> The other issue for me, and the real deciding factor, is you can't fit the
> amount of data I need persisted in an image. I expect its going to be
> measured in hundreds of GB, and the image is just going to be a small cache
> of recently used/accessed data.

Not to mention that if you're going to have many concurrent 
access/modifications to the same data stored in the image, things will 
get messy very, very quickly.


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