Re: Newbie Needs Ada Advice

[Markus E Leypold <development-2006-8ecbb5cc8aREMOVETHIS@ANDTHATm-e-leypold.de>]

Jacob Sparre Andersen <sparre@nbi.dk> writes:

> Markus E Leypold wrote:
>
>> Concerning pictures: I suggest you write them into a picture queue
>> in the filesystem and don't pass them through the RPC
>> interface. What you pass through the interface would just be the
>> file names.
>
> File names are slow.  Wouldn't it be more appropriate to keep the
> currently relevant image(s) in a shared memory segment?

Dependents on what you want to do. Probably not the whole 30 GB. My
rule of thumb always is to do the elementary thing first and optimize
later. In this case one could use the file storage (one use it
anyway), introduce (when required) the shared memory for explicit
caching (or perhaps play with memory mapping the file) and refine the
get-the-image protocol appropriately. My gut feeling though is, to
trust the file system cache of the machine to do the proper caching
implicitely and there should be a good reason to think you can do
better than that manually.

Regards -- Markus