Manual talk:MWDumper

GFDL
From http://mail.wikipedia.org/pipermail/wikitech-l/2006-February/033975.html:


 * I hereby declare it GFDL and RTFM-compatible. :) -- brion vibber


 * So this article, which started as a the README file from MWDumper, is allowed on the wiki. This might be good, as I tend to read wikis more than I read READMEs! --Kernigh 04:53, 12 February 2006 (UTC)

Example (in)correct?
Is the parameter -d correct described in this example?
 * java -jar mwdumper.jar --format=sql:1.5 pages_full.xml.bz2 | mysql -u -p
 * My mysql tells me
 * -p, --password[=name] Password to use when connecting to server ...
 * -D, --database=name Database to use.
 * (mysql Ver 14.7 Distrib 4.1.15, for pc-linux-gnu (i486) using readline 5.1)
 * Would this be better?
 * java -jar mwdumper.jar --format=sql:1.5 pages_full.xml.bz2 | mysql -u -D -p
 * (if password is given per command line there must be no space between -p and the actual password)
 * Or if the password is ommited it is requested interactively:
 * java -jar mwdumper.jar --format=sql:1.5 pages_full.xml.bz2 | mysql -u -D -p

MWDumper error
Running WinXP, XAMPP, JRE 1.5.0_08, MySQL JDBC 3.1.13

http://f.foto.radikal.ru/0610/4d1d041f3fd7.png --89.178.61.174 22:09, 9 October 2006 (UTC)

MWDumper Issues
Using MWDumper, how would I convert a Wikipedia/Wikibooks XML dump to an SQL file?

Problems with MWDumper
When I run: java -jar mwdumper.jar -–format=sql:1.5 enwiki-latest-pages-articles.xml.bz2 | c:\wamp\mysql\bin\mysql -u wikiuser -p wikidb

I get:

Exception in thread "main" java.io.FileNotFoundException: -ûformat=sql:1.5 (The system cannot find the file specified) at java.io.FileInputStream.open(Native Method) at java.io.FileInputStream. (Unknown Source) at java.io.FileInputStream. (Unknown Source) at org.mediawiki.dumper.Tools.openInputFile(Unknown Source) at org.mediawiki.dumper.Dumper.main(Unknown Source)

Please help!

SOLUTION:
For the above problem here is the fix:

java -jar mwdumper.jar -–format=sql:1.5 enwiki-latest-pages-articles.xml.bz2 | c:\wamp\mysql\bin\mysql -u wikiuser -p wikidb

Notice "-ûformat=sql:1.5" in the error message? The problem is one of the "–" is using the wrong char (caused by copy&paste)...just edit and replace (type) them by hand. so replace "-û" "--" next to format=sql:1.5

P.S For a really fast dump (60min vs 24hrs) unbzip the enwiki-latest-pages-articles.xml.bz2 file so that it becomes enwiki-latest-pages-articles.xml Then use the command: java -jar mwdumper.jar -–format=sql:1.5 enwiki-latest-pages-articles.xml | c:\wamp\mysql\bin\mysql -u wikiuser -p wikidb

Page Limitations?
I'm attempting to import a Wikipedia database dump comprized of about 4,800,000 files on a Windows XP system. I'm using the following command: java -jar mwdumper.jar --format=sql:1.5 enwiki-20070402-pages-articles.xml" | mysql -u root -p wikidb

Everything appears to go smootly, the progress indicator goes up to the expected 4 million and someting, but only 432,000 pages are actually imported into the MySQL database. Why is this? Any assistance is greatly appriciated. Uiop 02:31, 15 April 2007 (UTC)


 * MySQL experienced some error, and the error message scrolled off your screen. To aid in debugging, either save the output from mysql's stderr stream, or run mwdumper to a file first, etc. --brion 21:15, 20 April 2007 (UTC)

PROBLEM SOLVED
Mate, I had the same problem with it stopping at 432,000 pages. I'm assuming you're using WAMP here.

The problem is with with the log files. If you go to C:\wamp\mysql\data (or whatever's your equivalent directory) you'll see two files ib_logfile0 and ib_logfile1. You'll notice they are both 10Mb. They need to be much bigger. This is how you fix it.

To start off, you'll need to delete the dump you've been doing so far. Left click on the WAMP icon in the taskbar, choose MySQL, then MySQL Console. It will ask you for a password, which is blank by default so just press enter. Now type the following commands:

use wikidb; delete from page; delete from revision; delete from text; quit

OK. Now, left click on the WAMP icon in the taskbar and choose Config Files and then 'my.ini'. Find the line innodb_log_file_size, and set this to 512M (was 10M in mine). Scroll to the bottom, and add the following line:

set-variable=max_allowed_packet=32M

Left click on the WAMP icon in the taskbar and select MySQL->Stop Service. Open C:\wamp\mysql\data (or whatsoever your equivalent directory) and delete ib_logfile0 and ib_logfile1. Left-click on the WAMP icon in the taskbar again, and select MySQL->Start / Resume Service.

Now go ahead and run mwdumper.

Happy dumping!

Can dump be resumed?
I am using mwdumper to import enwiki-20070402-pages-articles.xml. I got up to 1,144,000 pages and, instead of showing how many pages per second it was importing, it said (-/sec). 1,115,000 said the same thing.

After that, the import sped up dramatically: It says it's processing around (20/sec) but in fact it seems to be doing about 2000/sec, because those figures are flying past!

I'm afraid that after 30 hours of importing, I may have lost it. I don't want to start again, especially if that means the possibility of the same happening again. Debugging by trial and error could take the rest of my life!

Is there any way that I can resume the dump from 144,000 pages if need be?

(Hopefully this dump DOES work anyway. Maybe I need to increase innodb_log_file_size to 1024G or perhaps 2048G.)