I'm using MLDBM to store the results from a web crawler bot. These are all HOH values, not too complicated. I'm fairly certain that if I am just running one bot, all should be well -- though I'm watching out for the data structure memory size restriction mentioned in the bugs area of MLDBM, just hoping this won't be a problem.
But what happens if I run multiple crawlers, all writing their data to the same file? Assuming no data conflicts -- such as updating the same hash key with different data -- am I going to be okay?
If there is data conflict, does MLDBM give you feedback that there was a conflict, or just update with the first value then the second value, or what?
Data-structure wise, I don't think I need an RDBMS system. But concurrency wise?
If it seems MLDBM is going to give me trouble, can someone suggest an alternative that handles concurrency with hash serialization better?
UPDATE: Followup-ish post at Can I serialize an object and have it remember it's type?
Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
Read Where should I post X? if you're not absolutely sure you're posting in the right place.
Please read these before you post! —
Posts may use any of the Perl Monks Approved HTML tags:
- a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
| |
For: |
|
Use: |
| & | | & |
| < | | < |
| > | | > |
| [ | | [ |
| ] | | ] |
Link using PerlMonks shortcuts! What shortcuts can I use for linking?
See Writeup Formatting Tips and other pages linked from there for more info.