<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div>Well, this is certainly interesting, since this would allow me to decouple the storage system from the lisp environment allowing the possibility of setting up a cluster of lisp machines to handle application logic. Isn't there a way to achieve this on BDB?</div><div><br class="webkit-block-placeholder"></div><div>We prefer to deploy our systems on clusters of "inexpensive" machines in order to leverage hardware failures and it seems that scalability of BDB/Lisp applications is achieved by scaling a single machine.</div><div><br class="webkit-block-placeholder"></div><div>Now, postmodern being 4x slower could be an issue. However, how does that compare to a regular CL-SQL and relational queries is a different story. If postmodern is about the same speed as hitting Postgres with CL-SQL and just using plain SQL instead of elephant, at the end of the day, that's the performance our users are getting anyway :)</div><div><br class="webkit-block-placeholder"></div><div>Thanks,</div><div>Waldo</div><br><div><blockquote type="cite"><blockquote type="cite"><font class="Apple-style-span" color="#000000"><br></font>Since Postgres does allow for features such as replication, clustering, and fail-over with multiple active simultaneous client connections, does this mean that I could have multiple (separate) lisp clients using elephant connecting to a separate Postgres cluster with no concurrency issues?<br></blockquote><br>Yes.<br><br>You can do this on BDB, but only on the same system as it relies on shared memory locks between processes. This helps for multi-CPU systems (one lisp process per CPU) but not for distributing Elephant across<br><br><blockquote type="cite">Thanks,<br></blockquote><blockquote type="cite">Waldo<br></blockquote><blockquote type="cite">_______________________________________________<br></blockquote><blockquote type="cite">elephant-devel site list<br></blockquote><blockquote type="cite"><a href="mailto:elephant-devel@common-lisp.net">elephant-devel@common-lisp.net</a><br></blockquote><blockquote type="cite"><a href="http://common-lisp.net/mailman/listinfo/elephant-devel">http://common-lisp.net/mailman/listinfo/elephant-devel</a><br></blockquote><br>_______________________________________________<br>elephant-devel site list<br><a href="mailto:elephant-devel@common-lisp.net">elephant-devel@common-lisp.net</a><br>http://common-lisp.net/mailman/listinfo/elephant-devel<br></blockquote></div><br></body></html>