I have a question on the strategy to move to custom mapping. 1/ One strategy is to resave all documents that use custom mapping and from now on, custom mapping will the the source of data. 2/ Another stragegy would be to move the data using SQL.
I also see that although the data is copied over on save to the custom mapping table the old data is not removed in the standard xwiki tables (this should probably be reported as a bug) and then should be manually deleted, so I'm starting to think that the second strategy would be the fastes and most efficient one. Any experience in this area ? Ludovic 2013/1/29 Ludovic Dubost <[email protected]> > I've updated the migration plan with in particular the clean-up queries > that would delete the old history data and the old XWikiTranslator activity > stream data. > The volumes are much more reasonable now (100K activity stream and 30k > history) so I don't think we need to delete more. > > I'm finalizing the custom mapping migration locally (this will add > significant history as every document will be resaved). > > Can the queries be reviewed ? > > http://l10n.xwiki.org/xwiki/bin/view/L10N/L10NMigrationPlan > > Ludovic > > > 2013/1/24 Ludovic Dubost <[email protected]> > >> Hi, >> >> I've published a migration plan: >> >> http://l10n.xwiki.org/xwiki/bin/view/L10N/L10NMigrationPlan >> >> Review welcome >> >> Ludovic >> >> >> 2013/1/24 Ludovic Dubost <[email protected]> >> >>> FYI, here are the running times of these queries: >>> >>> mysql> create table l10n_stats_author as select year(xwr_date)*100+ >>> month(xwr_date) as l10n_month, XWR_AUTHOR as l10n_author, count(distinct >>> XWR_DOCID, XWR_VERSION1, XWR_VERSION2) as l10n_count from xwikircs group by >>> 1,2; >>> Query OK, 763 rows affected (1 min 28.36 sec) >>> Records: 763 Duplicates: 0 Warnings: 0 >>> >>> mysql> delete from l10n_stats_author where l10n_month=201301 or >>> l10n_month=201302; >>> Query OK, 29 rows affected (0.00 sec) >>> >>> mysql> insert into l10n_stats_author (select year(xwr_date)*100+ >>> month(xwr_date) as l10n_month, XWR_AUTHOR as l10n_author, count(distinct >>> XWR_DOCID, XWR_VERSION1, XWR_VERSION2) as l10n_count from xwikircs where >>> xwr_date >= '2012-12-01' group by 1,2); >>> Query OK, 35 rows affected (0.07 sec) >>> Records: 35 Duplicates: 0 Warnings: 0 >>> >>> Update is very fast >>> >>> Ludovic >>> >>> >>> 2013/1/24 Ludovic Dubost <[email protected]> >>> >>>> The custom statistics data structure is not that complicated. >>>> I've already the SQL query that does the initial version (based on >>>> xwikircs for now) >>>> >>>> create table l10n_stats_author as select year(xwr_date)*100+ >>>> month(xwr_date) as l10n_month, XWR_AUTHOR as l10n_author, count(distinct >>>> XWR_DOCID, XWR_VERSION1, XWR_VERSION2) as l10n_count from xwikircs group by >>>> 1,2; >>>> delete from l10n_stats_author where l10n_month=201301 or >>>> l10n_month=201302; >>>> insert into l10n_stats_author (select year(xwr_date)*100+ >>>> month(xwr_date) as l10n_month, XWR_AUTHOR as l10n_author, count(distinct >>>> XWR_DOCID, XWR_VERSION1, XWR_VERSION2) as l10n_count from xwikircs where >>>> xwr_date >= '2012-12-01' group by 1,2); >>>> select * from l10n_stats_author where l10n_month=201301 or >>>> l10n_month=201302; >>>> >>>> >>>> Putting this in a scheduler job should not be complicated >>>> >>>> Ludovic >>>> >>>> >>>> >>>> 2013/1/24 Sergiu Dumitriu <[email protected]> >>>> >>>>> On 01/24/2013 12:03 AM, Ludovic Dubost wrote: >>>>> > Working on l10n change to custom mapping showed up an issue with the >>>>> l10n >>>>> > history. >>>>> > We have a huge history table with 2,3M lines (as well as an activity >>>>> > stream) and we use the history table for extracting contributor >>>>> statistics. >>>>> > >>>>> > However looking at it more closely shows that the source of most >>>>> data in >>>>> > the history table is useless. >>>>> > See here a grouping by dates showing that localisation of already >>>>> close to >>>>> > 2M lines in 6 month in 2012. >>>>> > >>>>> > | 201201 | 318346 | >>>>> > | 201202 | 311403 | >>>>> > | 201203 | 728703 | >>>>> > | 201204 | 271657 | >>>>> > | 201205 | 296384 | >>>>> > | 201206 | 120463 | >>>>> > >>>>> > Here is an example of history for an entry >>>>> > >>>>> > mysql> select >>>>> > >>>>> xwr_author,xwr_version1,xwr_version2,xwr_date,xwr_comment,cast(xwr_isdiff >>>>> > as unsigned), length(xwr_patch) from xwikircs where >>>>> xwr_docid=596494851 ; >>>>> > >>>>> +-----------------------+--------------+--------------+---------------------+-------------+------------------------------+-------------------+ >>>>> > | xwr_author | xwr_version1 | xwr_version2 | xwr_date >>>>> > | xwr_comment | cast(xwr_isdiff as unsigned) | length(xwr_patch) | >>>>> > >>>>> +-----------------------+--------------+--------------+---------------------+-------------+------------------------------+-------------------+ >>>>> > | XWiki.XWikiTranslator | 1 | 1 | 2010-02-23 >>>>> 11:38:27 >>>>> > | | 1 | 163 | >>>>> > | XWiki.XWikiTranslator | 2 | 1 | 2010-02-23 >>>>> 11:40:26 >>>>> > | | 1 | 330 | >>>>> > | XWiki.rbuj | 3 | 1 | 2010-03-04 >>>>> 00:24:24 >>>>> > | | 1 | 189 | >>>>> > | XWiki.rbuj | 4 | 1 | 2010-03-04 >>>>> 01:02:52 >>>>> > | | 1 | 223 | >>>>> > | XWiki.rbuj | 5 | 1 | 2010-07-30 >>>>> 01:12:58 >>>>> > | | 0 | 5026 | >>>>> > | XWiki.XWikiTranslator | 6 | 1 | 2012-01-23 >>>>> 11:40:25 >>>>> > | | 1 | 115 | >>>>> > | XWiki.XWikiTranslator | 7 | 1 | 2012-01-23 >>>>> 11:58:25 >>>>> > | | 1 | 115 | >>>>> > | XWiki.XWikiTranslator | 8 | 1 | 2012-01-23 >>>>> 13:31:52 >>>>> > | | 1 | 234 | >>>>> > | XWiki.XWikiTranslator | 8 | 2 | 2012-01-23 >>>>> 15:36:02 >>>>> > | Prepared | 1 | 115 | >>>>> > | XWiki.XWikiTranslator | 8 | 3 | 2012-01-24 >>>>> 02:01:12 >>>>> > | Prepared | 0 | 5670 | >>>>> > | XWiki.XWikiTranslator | 8 | 4 | 2012-01-25 >>>>> 02:04:00 >>>>> > | Prepared | 1 | 115 | >>>>> > | XWiki.XWikiTranslator | 8 | 5 | 2012-01-26 >>>>> 02:02:29 >>>>> > | Prepared | 1 | 115 | >>>>> > | XWiki.XWikiTranslator | 8 | 6 | 2012-01-27 >>>>> 02:01:18 >>>>> > | Prepared | 1 | 115 | >>>>> > | XWiki.XWikiTranslator | 8 | 7 | 2012-02-04 >>>>> 02:01:08 >>>>> > | Prepared | 1 | 115 | >>>>> > | XWiki.XWikiTranslator | 8 | 8 | 2012-02-07 >>>>> 02:02:03 >>>>> > | Prepared | 0 | 5670 | >>>>> > | XWiki.XWikiTranslator | 8 | 9 | 2012-02-08 >>>>> 02:01:20 >>>>> > | Prepared | 1 | 115 | >>>>> > | XWiki.XWikiTranslator | 8 | 10 | 2012-02-14 >>>>> 02:01:07 >>>>> > | Prepared | 1 | 116 | >>>>> > | XWiki.XWikiTranslator | 8 | 11 | 2012-02-28 >>>>> 02:01:32 >>>>> > | Prepared | 1 | 116 | >>>>> > | XWiki.XWikiTranslator | 8 | 12 | 2012-03-03 >>>>> 02:01:20 >>>>> > | Prepared | 1 | 116 | >>>>> > | XWiki.XWikiTranslator | 8 | 13 | 2012-03-14 >>>>> 02:01:50 >>>>> > | Prepared | 0 | 5671 | >>>>> > | XWiki.XWikiTranslator | 8 | 14 | 2012-03-14 >>>>> 18:23:06 >>>>> > | Prepared | 1 | 116 | >>>>> > | XWiki.XWikiTranslator | 8 | 15 | 2012-03-14 >>>>> 18:32:38 >>>>> > | Prepared | 1 | 116 | >>>>> > | XWiki.XWikiTranslator | 8 | 16 | 2012-03-14 >>>>> 18:37:17 >>>>> > | Prepared | 1 | 116 | >>>>> > | XWiki.XWikiTranslator | 8 | 17 | 2012-03-24 >>>>> 02:01:34 >>>>> > | Prepared | 1 | 116 | >>>>> > | XWiki.XWikiTranslator | 8 | 18 | 2012-03-26 >>>>> 16:40:35 >>>>> > | Prepared | 0 | 5671 | >>>>> > | XWiki.XWikiTranslator | 8 | 19 | 2012-03-28 >>>>> 02:01:23 >>>>> > | Prepared | 1 | 116 | >>>>> > | XWiki.XWikiTranslator | 8 | 20 | 2012-03-29 >>>>> 02:01:45 >>>>> > | Prepared | 1 | 116 | >>>>> > | XWiki.XWikiTranslator | 8 | 21 | 2012-04-11 >>>>> 02:01:36 >>>>> > | Prepared | 1 | 116 | >>>>> > | XWiki.XWikiTranslator | 8 | 22 | 2012-04-19 >>>>> 15:20:10 >>>>> > | Prepared | 1 | 116 | >>>>> > | XWiki.XWikiTranslator | 8 | 24 | 2012-04-29 >>>>> 02:01:45 >>>>> > | Prepared | 1 | 116 | >>>>> > | XWiki.XWikiTranslator | 8 | 25 | 2012-05-04 >>>>> 18:55:30 >>>>> > | Prepared | 1 | 116 | >>>>> > | XWiki.XWikiTranslator | 8 | 26 | 2012-05-04 >>>>> 19:02:09 >>>>> > | Prepared | 1 | 116 | >>>>> > | XWiki.XWikiTranslator | 8 | 27 | 2012-05-10 >>>>> 02:04:36 >>>>> > | Prepared | 1 | 116 | >>>>> > | XWiki.XWikiTranslator | 8 | 28 | 2012-05-30 >>>>> 02:02:08 >>>>> > | Prepared | 0 | 5671 | >>>>> > | XWiki.XWikiTranslator | 8 | 29 | 2012-06-07 >>>>> 10:44:28 >>>>> > | Prepared | 0 | 5782 | >>>>> > >>>>> +-----------------------+--------------+--------------+---------------------+-------------+------------------------------+-------------------+ >>>>> > >>>>> > >>>>> http://l10n.xwiki.org/xwiki/bin/view/XE/XEXWikiCoreResources_2107067965_core-menu-watchlist-add-page_nl?viewer=history&showminor=true >>>>> > >>>>> > Most entries are "no changes" and have been cause by the L10NUpdater >>>>> which >>>>> > wrongefully saved the document with no changes. I believe this must >>>>> have >>>>> > been fixed (by Thomas M.?) mid 2012. >>>>> > >>>>> > Now the 2M lines impact performance significantly and loads the DB >>>>> for >>>>> > nothing (and in the activity stream as well). >>>>> > >>>>> > I suggest we clean up the history and activity stream. We have 2 >>>>> > possibilities: >>>>> > >>>>> > For xwikircs: >>>>> > >>>>> > 1/ Clean up only the bad data from XWikiTranslator when there are no >>>>> > changes: >>>>> > >>>>> > This is complicated as you need to verify if the change is actually a >>>>> > change and you cannot do that just with sql queries. It could be >>>>> very long >>>>> > >>>>> > 2/ Clean up old data from pre-201206 from XWikiTranslator >>>>> > >>>>> > Simpler if it is safe to delete by date in the DB. After discussion >>>>> with >>>>> > sergui this is a bit complicated because you need to make sure you >>>>> don't >>>>> > delete the latest full version before the versions you keep. So you >>>>> would >>>>> > have to do it by API which will take ages. >>>>> > >>>>> > 3/ Clean up up old data from pre-201206 from all users >>>>> > >>>>> > This is simpler as you can safely delete from the database >>>>> everything older >>>>> > than a certain versions. Cleans-up even more but would loose >>>>> contributor >>>>> > statistics unless we store 2012 contributor counts in an alternate >>>>> table >>>>> > which would then be regularly updated >>>>> >>>>> +1 for 3/, without the extra stats table yet. See below. >>>>> >>>>> Technically, we could also use /2, since we'll still have history >>>>> summary (who changed when), but some actual versions won't be >>>>> retrievable. Is the actual revision important? IMHO, only if we want to >>>>> investigate some foul play. >>>>> >>>>> > In any case we should probably create this intermediary table for >>>>> > statistics as it would be much faster anyway. >>>>> > >>>>> > For activitystream: >>>>> > >>>>> > 1/ Clean up old data from XWikiTranslator 201206 or earlier >>>>> > >>>>> > 2/ Clean up old date from everybody 201206 or earlier >>>>> >>>>> +1 for 1/ >>>>> >>>>> > What value do we see in the l10n history and actvity stream and which >>>>> > solutions do the other commiters suggest ? >>>>> > >>>>> > I would say it's interesting for contributor statistics (counting >>>>> number of >>>>> > contribution by translators) but beyond that we can delete the data. >>>>> > So we would fix that by storing monthly statistics in a table and >>>>> updating >>>>> > the latest 2 month through a scheduler job. This means that we can >>>>> also >>>>> > delete history over 2 month. >>>>> >>>>> We can get contributor activity from the activity stream, independently >>>>> from the RCS table. Since the activity stream doesn't have >>>>> inter-version >>>>> dependencies like the RCS does, we can freely discard irrelevant rows >>>>> from it, and use the remaining valid data. The same information is >>>>> present in the activity stream and in the RCS table: who did what, >>>>> when, >>>>> and where. >>>>> >>>>> I mean, this is a good fast solution for the moment. We could still >>>>> make >>>>> a custom statistics data structure for translation contributors, but >>>>> that would take longer, and thus it delays the migration of the l10n >>>>> wiki to a newer version, and delays the performance improvement that >>>>> we'd gain by dropping data. >>>>> >>>>> -- >>>>> Sergiu Dumitriu >>>>> http://purl.org/net/sergiu >>>>> _______________________________________________ >>>>> devs mailing list >>>>> [email protected] >>>>> http://lists.xwiki.org/mailman/listinfo/devs >>>>> >>>> >>>> >>>> >>>> -- >>>> Ludovic Dubost >>>> Founder and CEO >>>> Blog: http://blog.ludovic.org/ >>>> XWiki: http://www.xwiki.com >>>> Skype: ldubost GTalk: ldubost >>>> >>> >>> >>> >>> -- >>> Ludovic Dubost >>> Founder and CEO >>> Blog: http://blog.ludovic.org/ >>> XWiki: http://www.xwiki.com >>> Skype: ldubost GTalk: ldubost >>> >> >> >> >> -- >> Ludovic Dubost >> Founder and CEO >> Blog: http://blog.ludovic.org/ >> XWiki: http://www.xwiki.com >> Skype: ldubost GTalk: ldubost >> > > > > -- > Ludovic Dubost > Founder and CEO > Blog: http://blog.ludovic.org/ > XWiki: http://www.xwiki.com > Skype: ldubost GTalk: ldubost > -- Ludovic Dubost Founder and CEO Blog: http://blog.ludovic.org/ XWiki: http://www.xwiki.com Skype: ldubost GTalk: ldubost _______________________________________________ devs mailing list [email protected] http://lists.xwiki.org/mailman/listinfo/devs
