[BACK]Return to loncapasqldatabase.html CVS log [TXT] [DIR] Up to [LON-CAPA] / doc / build

Diff for /doc/build/Attic/loncapasqldatabase.html between versions 1.11 and 1.15

version 1.11, 2001/02/15 15:04:04 version 1.15, 2001/02/20 22:24:45
Line 8 Line 8
 Scott Harrison  Scott Harrison
 </P>  </P>
 <P>  <P>
 Last updated: 02/14/2001  Last updated: 02/15/2001
 </P>  </P>
 <P>  <P>
 This file describes issues associated with LON-CAPA  This file describes issues associated with LON-CAPA
Line 32  and a SQL database. Line 32  and a SQL database.
 </P>  </P>
 <H2>Important notes</H2>  <H2>Important notes</H2>
 <P>  <P>
   The current database is implemented assuming a non-adjustable
   architecture involving these data fields (specific to each version
   of a resource).
   <UL>
   <LI>title</LI>
   <LI>author</LI>
   <LI>subject</LI>
   <LI>notes</LI>
   <LI>abstract</LI>
   <LI>mime</LI>
   <LI>language</LI>
   <LI>creationdate</LI>
   <LI>lastrevisiondate</LI>
   <LI>owner</LI>
   <LI>copyright</LI>
   </UL>
   </P>
   <P>
   Security occurs as a function of the user 'www',
   and the permissions on the files in the /usr/local/mysql
   directory.  (These files and directories should
   be 700, 600, 500, 400, etc; not allow access to anyone
   but user 'www'.)
   </P>
   <P>
   These commands create the loncapameta database.
   <PRE>
   mysql> CREATE DATABASE IF NOT EXISTS loncapa;
   mysql> USE loncapa;
   mysql> CREATE TABLE IF NOT EXISTS metadata (title TEXT, author TEXT, subject TEXT, notes TEXT, abstract TEXT, mime TEXT, language TEXT, creationdate TEXT, lastrevisiondate TEXT, owner TEXT, copyright TEXT, FULLTEXT idx_title (title), FULLTEXT idx_author (author), FULLTEXT idx_subject (subject), FULLTEXT idx_notes (notes), FULLTEXT idx_abstract (abstract), FULLTEXT idx_mime (mime), FULLTEXT idx_language (language), FULLTEXT idx_creationdate (creationdate), FULLTEXT idx_lastrevisiondate (lastrevisiondate), FULLTEXT idx_owner (owner), FULLTEXT idx_copyright (copyright)) TYPE=MYISAM;
   mysql> INSERT INTO metadata VALUES ('1','2','3','4','5','6','7','8','9','10','11');
   mysql> SELECT * FROM metadata WHERE title REGEXP "1";
   </PRE>
   </P>
   <P>
   Current time values for things.
   <PRE>
   fenchurch.lite.msu.edu
   Mem:    46812K av,   45632K used,    1180K free,   14756K shrd,    4292K buff
   Swap: 1148608K av,   11260K used, 1137348K free                   13244K cached
   
   Red Hat Linux release 6.2 (Zoot)
   Kernel 2.2.16-3 on an i586
   </PRE>
   <BR>Q: How big are data records in test database? A: on average, 1000 bytes each, medline records from PubMed.
   <BR>Q: How big is the biggest field? A: on average, 838 bytes each
   <BR>Q: How much time to insert 5284 medline records into database?
   A: 600 seconds
   <BR>Q: What about when using "speed-technique" on page 130? A: 689 seconds (weird, eh?)
   <BR>Q: What about REGEXP searching? A: about 1-2 seconds for small fields;
   10 to 20 seconds for REGEXP search on "abstract" field
   <BR>Q: What about FULLTEXT indexing? A: about 6 seconds for abstract field.
   
   </P>
   <P>
   An important quote from the manual:
   <BLOCKQUOTE>
   In MySQL Version 3.23.23 or later, you can also create special FULLTEXT indexes. They are used for full-text search. Only the MyISAM table type supports FULLTEXT indexes. They can be created only from
   VARCHAR and TEXT columns. Indexing always happens over the entire column and partial indexing is not supported. See section 25.2 MySQL Full-text Search for details. 
   </BLOCKQUOTE>
   </P>
   <P>
   I plan on using a MyISAM table type with 11 metadata fields of column 
   type=TEXT.
   </P>
   <P>
 It might be worthwhile to look at /usr/local/mysql/manual.html.  It might be worthwhile to look at /usr/local/mysql/manual.html.
 It is quite in depth.  It is quite in depth.
 </P>  </P>
Line 339  These files are installed. Line 405  These files are installed.
 </P>  </P>
 <P>  <P>
 This is how I installed the DBI perl modules.  This is how I installed the DBI perl modules.
 <PRE>  <PRE>$dbh
 [root@fenchurch DBI-1.14]# perl Makefile.PL  [root@fenchurch DBI-1.14]# perl Makefile.PL
 *** Note:  *** Note:
     The optional PlRPC-modules (RPC::PlServer etc) are not installed.      The optional PlRPC-modules (RPC::PlServer etc) are not installed.
Removed from v.1.11  
changed lines
  Added in v.1.15

FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>