Re: Best database for implementing a cache

vj wrote:
If I'm asking a question whose answer is obvious to
everyone else, I apologize, but: What do you want the
database to do for you? The only requirement you've
mentioned is that you want to deposit the images in it
"very fast," but you haven't said what you want to do
with them afterwards. Do you need to retrieve the images
in "as received" condition, or do you need to pluck out
bits and pieces of transformed image data? Do you need
to do OCR on the images and index them by all the words
that are recognized? Do you need to do face recognition,
fingerprint matching, ...?


Sorry i think that i failed to mark the word cache in bold letter. May
i opine that would also be
obvious to every one else here that a cache server simply stores
frequently accessed data &
usually it does not transforms it in any way.

Fine, but you still haven't explained what this <b>cache</b>
is supposed to do. (Well, you <i>have</i> explained, but saying
that it "simply stores frequently accessed data" is obviously
wrong: if it were right, you'd have already followed my earlier
suggestion to use /dev/null.)

So: What search criterion or criteria is or are used to
retrieve things from this <b>cache</b>? Can the <b>cache</b>
expand indefinitely, or is some kind of housecleaning policy
envisioned (and if so, what kind)? And how much faster than
your network connection must the <b>cache</b> be in order to
meet your requirement of "very fast?"

No one can become a successful programmer without the ability
to describe the problems he or she is trying to solve. More often
than not, getting the problem description right is the hardest
part of doing the job.

--
Eric Sosman
esosman@xxxxxxxxxxxxxxxxxxx
.

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