############################################################################### # # # INSTALL.MySQL - How to integrate HLmaps with a MySQL database # # - Copyright Scott McCrory as part of the HLmaps distribution # # - Distributed under the GNU Public License - see docs for info # # - http://hlmaps.sourceforge.net # # # ############################################################################### # CVS $Id: INSTALL.MySQL,v 1.3 2001/01/07 01:27:11 smccrory Exp $ ############################################################################### Introduction ------------ HLmaps now supports MySQL as the interrim data store! I added this functionality in hopes that other developers could use the information gathered for new applications that I can't even imagine. I don't think you'll get any speed improvements with MySQL vs. the text data file and you'll be introducing an additional component which could break, so only go this route if you want to experiment with the capability, develop for it or because another app you want to run depends on it. IF YOU ARE DEVELOPING FOR THIS CAPABILITY, please email me at smccrory@users.sourceforge.net with any questions, suggestions, etc. as I'm very interested in seeing how this plays out. You really must get HLmaps to work with just the text data file first before switching to MySQL to make resolving any problems easier. I'm pretty new to databases and MySQL so if one of you more experienced blokes finds something I missed, please let me know. Set up the Database ------------------- I'll assume that you already have MySQL installed as well as the Perl DBI stuff needed. If you're new to this database system, I recommend getting a book called "MySQL" by Paul Dubois published by New Riders - I've found it to be excellent. Create a database called "HLmaps" using your favorite interface (I like kmysqladmin myself) and check to make sure that it was created OK. Create a User and Assign Permissions ------------------------------------ Again, using your favorite interface, create a user called "HLmaps" with a password of "HLmaps" and grant it full permissions to ONLY the HLmaps database from ONLY the localhost unless you plan to connect from another system. Modify the CONF Settings ------------------------ Change the DATA_LOCATION variable in the hlmaps.conf file to "mysql" and check to make sure the other MYSQL_* variables are suitable. This will tell hlmaps.cron and hlmaps.pl to use MySQL instead of the text data file for interrim storage. Unremark the "use DBI;" Lines and the $DBI::err Line ---------------------------------------------------- Well, first you must have the Perl DBI installed, and then go into hlmaps.pl and hlmaps.cron and unremark the two "use DBI;" lines in each of those files. Also remark the "print" function just below those lines to get rid of the message and the "$DBI::err" line near the end of hlmaps.cron. Sorry I had to do it this way - I haven't had time to place the SQL functions in a separate (conditionally loaded) module. Test and Troubleshoot --------------------- Manually run hlmaps.cron by typing /etc/cron.daily/hlmaps.cron and see if any errors were reported. If you get a permissions error, check grants, and so on. Once you have everything worked out, hlmaps.cron should be silently successful and you can check the database for a table called "maps" with the same info that your hlmaps.data file was storing. Now you should be able to run hlmaps.pl from a browser window to access the database during its data lookup phase. Move the text data file if you want to be sure hlmaps.pl is using the DB instead of the file. If it still works, then you're done! -- Hope you enjoy! Scott and the HLmaps development team.
