I can't speak for Oracle, but MySQL's replication strategy is very robust, but not without limitations.

With MySQL replication one DB serves as the master and others as children. Updates, inserts, and deletes should only be done on the Master (which pushes the changes down to the children), but selects can be done on any of the DBs. This works well because for many tasks because in many instances DB access is much more read-oriented than write-oriented.

You can even do something similar with the DBD::Multiplex. It allows you to have a single database handle (from your program's point of view) that connects to multiple DB's on the back end. It'll use any of the DB's when doing a select, but any updates/inserts/deletes will be performed on all teh DB's.

In reply to Re: Re: Re: Distributed DBM data storage by lhoward
in thread Distributed DBM data storage by agoth

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • 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:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.