Thanks for your answer Dan, I need to retrieve and collect data and do some calculations on them. The most difficult to extract and operate is revisions, pagelinks and category links. The approach you are suggesting would be good if I wanted to mine the text besides the links, but this is not the case. I need to count all the incoming links to articles and all the incoming links to articles from a group of articles. The same with outlinks.
I'm going to try to download the pagelinks dump for sql tables (e.g. https://dumps.wikimedia.org/enwiki/20190701). But I am afraid the time to download each of them, parse it, transform it to csv, sort the file by certain columns, etc. would be more costful (time) than doing it in the original table (replicas) even now the performance is much slower than last year. In case it doesn't work, I might ping again because I need to progress on the project I am working on. Thanks for your help. Best regards, Marc Miquel Missatge de Dan Andreescu <dandree...@wikimedia.org> del dia dl., 15 de jul. 2019 a les 21:55: > Hi Marc, > > To follow up on something Nuria said that may have gotten lost: the xml > dumps have this information, but you'll have to parse the content. See the > example in the docs: > https://meta.wikimedia.org/wiki/Data_dumps/Dump_format#Format_of_the_XML_files. > If you expand the "content dump" link, you'll see one of the revisions has > some wikitext: "un projet de [[dictionnaire]] écrit collectivement". You > can parse the majority of links by looking for > [[all-text-before-a-vertical-bar-is-the-link-itself|link text]]. And you > can find all templates similarly looking for {template}, categories, etc. > Of course, if there are nested templates or templates that generate links, > you won't find those this way. > > I think that's what you're investigating right now, but writing just in > case. We will eventually publish this data in an easy-to-consume public > dataset, but we have too many other priorities this year. Still, if you > file a task in phabricator, it will help us prioritize it in the future. > > And feel free to write back as you're parsing through dumps, any help we > give you there will help us work on it in the future. Thanks! > > On Tue, Jul 9, 2019 at 11:44 AM Marc Miquel <marcmiq...@gmail.com> wrote: > >> Thank you Houcemeddine for your answer. At the moment the project is >> already funded by a Project Grant by the WMF. Nuria had referred to a >> formal collaboration as a sort of frame to access the Hadoop resource. >> >> Thanks Nuria for your recommendation on importing data and computing >> somewhere else. I will do some tests and estimate the time it might take >> along with the rest of computations, as it needs to run on a monthly basis. >> This is something I definitely need to verify. >> >> Best regards, >> >> Marc >> >> Missatge de Houcemeddine A. Turki <turkiabdelwa...@hotmail.fr> del dia >> dt., 9 de jul. 2019 a les 17:20: >> >>> Dear Mr., >>> I thank you for your efforts. The link to H2020 is >>> https://ec.europa.eu/programmes/horizon2020/en/how-get-funding. >>> Yours Sincerely, >>> Houcemeddine Turki >>> ------------------------------ >>> *De :* Analytics <analytics-boun...@lists.wikimedia.org> de la part de >>> Houcemeddine A. Turki <turkiabdelwa...@hotmail.fr> >>> *Envoyé :* mardi 9 juillet 2019 16:12 >>> *À :* A mailing list for the Analytics Team at WMF and everybody who >>> has an interest in Wikipedia and analytics. >>> *Objet :* Re: [Analytics] project Cultural Diversity Observatory / >>> accessing analytics hadoop databases >>> >>> Dear Mr., >>> I thank you for your efforts. When we were in WikiIndaba 2018, it was >>> interesting to see your research work. The project is interesting >>> particularly because there are many cultures across the work that are >>> underrepresented in Internet and mainly Wikipedia. Concerning the formal >>> collaboration, I think that if your team can apply for a H2020 grant, this >>> will be useful. This worked for the Scholia project and can work for you as >>> well. >>> Yours Sincerely, >>> Houcemeddine Turki >>> ------------------------------ >>> *De :* Analytics <analytics-boun...@lists.wikimedia.org> de la part de >>> Nuria Ruiz <nu...@wikimedia.org> >>> *Envoyé :* mardi 9 juillet 2019 16:00 >>> *À :* A mailing list for the Analytics Team at WMF and everybody who >>> has an interest in Wikipedia and analytics. >>> *Objet :* Re: [Analytics] project Cultural Diversity Observatory / >>> accessing analytics hadoop databases >>> >>> Marc: >>> >>> >We'd like to start the formal process to have an active collaboration, >>> as it seems there is no other solution available >>> >>> Given that formal collaborations are somewhat hard to obtain (research >>> team has so many resources) my recommendation would be to import the >>> public data into other computing platform that is not as constrained as >>> labs in terms of space and do your calculations there. >>> >>> Thanks, >>> >>> Nuria >>> >>> >>> >>> On Tue, Jul 9, 2019 at 3:50 AM Marc Miquel <marcmiq...@gmail.com> wrote: >>> >>> Thanks for your clarification Nuria. >>> >>> The categorylinks table is working better lately. Computing counts at >>> the pagelinks table is critical. I'm afraid there is no solution for this >>> one. >>> >>> I thought about creating a temporary table pagelinks with data from the >>> dumps for each language edition. But to replicate the pagelinks database in >>> the sever local disk would be so costful in terms of time and space. The >>> magnitude of the enwiki table for pagelinks must be more than 50GB. The >>> entire process would run during many many days considering the other >>> language editions too. >>> >>> Other counts I need to do is the number of editors per article, which >>> also gets stuck with the revision table. For the rest of data, as you said, >>> it is more about retrieval, as you said, and I can use alternatives. >>> >>> The queries to obtain count for pagelinks is something that worked >>> before with the database replicas and a database with more power like >>> Hadoop would do with certain ease. The problem is both a mixture of >>> retrieval but also computing power. >>> >>> We'd like to start the formal process to have an active collaboration, >>> as it seems there is no other solution available and we cannot be stuck and >>> not deliver the work promised. I'll let you know when I have more info. >>> >>> Thanks again. >>> Best, >>> >>> Marc Miquel >>> >>> >>> Missatge de Nuria Ruiz <nu...@wikimedia.org> del dia dt., 9 de jul. >>> 2019 a les 1:44: >>> >>> >Will there be a release for these two tables? >>> No, sorry, there will not be. The dataset release is about pages and >>> users. To be extra clear though, it is not tables but a denormalized >>> reconstruction of the edit history. >>> >>> > Could I connect to the Hadoop to see if the queries on pagelinks and >>> categorylinks run faster? >>> It is a bit more complicated that just "connecting" but I do not think >>> we have to dwell on that, cause, as far as I know, there is no categorylink >>> info in hadoop. >>> >>> >>> Hadoop has the set of data from mediawiki that we use to create the >>> dataset I pointed you to: >>> https://wikitech.wikimedia.org/wiki/Analytics/Data_Lake/Edits/Mediawiki_history >>> and >>> a bit more. >>> >>> Is it possible to extract some of this information from the xml dumps? >>> Perhaps somebody in the list has other ideas? >>> >>> Thanks, >>> >>> Nuria >>> >>> P.S. So you know in order to facilitate access to our computing >>> resources and private data (there is no way for us to give access to only >>> "part" of the data we hold in hadoop) we require an active collaboration >>> with our research team. We cannot support ad-hoc access to hadoop for >>> community members. >>> Here is some info: >>> https://www.mediawiki.org/wiki/Wikimedia_Research/Formal_collaborations >>> >>> >>> >>> >>> >>> >>> On Mon, Jul 8, 2019 at 4:14 PM Marc Miquel <marcmiq...@gmail.com> wrote: >>> >>> Hello Nuria, >>> >>> This seems like an interesting alternative for some data (page, users, >>> revision). It can really help and make some processes faster (at the moment >>> we gave up running again the revision, as the new user_agent change made it >>> also slower). So we will take a look at it as soon as it is ready. >>> >>> However, the scripts are struggling with other tables: pagelinks and >>> category graph. >>> >>> For instance, we need to count the percentage of links an article >>> directs to other pages or the percentage of links it receives from a group >>> of pages. Likewise, we need to run down the category graph starting from a >>> specific group of categories. At the moment, the query that uses pagelinks >>> is not really working when counting when passing parameters for the entire >>> table or for specific parts (using batches). >>> >>> Will there be a release for these two tables? Could I connect to the >>> Hadoop to see if the queries on pagelinks and categorylinks run faster? >>> >>> If there is any other alternative we'd be happy to try as we cannot >>> progress for several weeks. >>> Thanks again, >>> >>> Marc >>> >>> Missatge de Nuria Ruiz <nu...@wikimedia.org> del dia dt., 9 de jul. >>> 2019 a les 0:56: >>> >>> Hello, >>> >>> From your description seems that your problem is not one of computation >>> (well, your main problem) but rather data extraction. The labs replicas >>> are not meant for big data extraction jobs as you have just found out. >>> Neither is Hadoop. Now, our team will be releasing soon a dataset of edit >>> denormalized data that you can probably use, it is still up for discussion >>> whether the data will be released as a JSON dump or other but basically is >>> a denormalized version of all the data held in the replicas that will be >>> created monthly. >>> >>> Please take a look at the documentation of the dataset: >>> >>> https://wikitech.wikimedia.org/wiki/Analytics/Data_Lake/Edits/Mediawiki_history >>> >>> This is the phab ticket: >>> https://phabricator.wikimedia.org/T208612 >>> >>> So, to sum up, once this dataset is out (we hope late this quarter or >>> early next) you can probably build your own datasets from it thus rendering >>> your usage of the replicas obsolete. Hopefully this makes sense. >>> >>> Thanks, >>> >>> Nuria >>> >>> >>> >>> >>> On Mon, Jul 8, 2019 at 3:34 PM Marc Miquel <marcmiq...@gmail.com> wrote: >>> >>> To whom it might concern, >>> >>> I am writing in regards of the project *Cultural Diversity Observatory* >>> and the data we are collecting. In short, this project aims at bridging the >>> content gaps between language editions that relate to cultural and >>> geographical aspects. For this we need to retrieve data from all language >>> editions and Wikidata, and run some scripts in order to crawl down the >>> category and the link graph, in order to create some datasets and >>> statistics. >>> >>> The reason that I am writing is because we are stuck as we cannot >>> automatize the scripts to retrieve data from the Replicas. We could create >>> the datasets few months ago but during the past months it is impossible. >>> >>> We are concerned because one thing is to create the dataset once for >>> research purposes and another thing is to create them on monthly basis. >>> This is what we promised in the project grant >>> <https://meta.wikimedia.org/wiki/Grants:Project/WCDO/Culture_Gap_Monthly_Monitoring> >>> details and now we cannot do it because of the infrastructure. It is >>> important to do it on monthly basis because the data visualizations and >>> statistics Wikipedia communities will receive need to be updated. >>> >>> Lately there had been some changes in the Replicas databases and the >>> queries that used to take several hours are getting stuck completely. We >>> tried to code them in multiple ways: a) using complex queries, b) doing the >>> joins as code logics and in-memory, c) downloading the parts of the table >>> that we require and storing them in a local database. *None is an >>> option now *considering the current performance of the replicas. >>> >>> Bryan Davis suggested that this might be a moment to consult the >>> Analytics team, considering the Hadoop environemnt is design to run long, >>> complex queries and it has massively more compute power than the Wiki >>> Replicas cluster. We would certainly be relieved If you considerd we could >>> connect to these Analytics databases (Hadoop). >>> >>> Let us know if you need more information on the specific queries or the >>> processes we are running. The server we are using is wcdo.eqiad.wmflabs. We >>> will be happy to explain in detail anything you require. >>> >>> Thanks. >>> Best regards, >>> >>> Marc Miquel >>> >>> PS: You can read about the method we follow to retrieve data and create >>> the dataset here: >>> >>> * Miquel-Ribé, M., & Laniado, D. (2019). Wikipedia Cultural Diversity >>> Dataset: A Complete Cartography for 300 Language Editions. Proceedings of >>> the 13th International AAAI Conference on Web and Social Media. ICWSM. ACM. >>> 2334-0770 * >>> wvvw.aaai.org/ojs/index.php/ICWSM/article/download/3260/3128/ >>> _______________________________________________ >>> Analytics mailing list >>> Analytics@lists.wikimedia.org >>> https://lists.wikimedia.org/mailman/listinfo/analytics >>> >>> _______________________________________________ >>> Analytics mailing list >>> Analytics@lists.wikimedia.org >>> https://lists.wikimedia.org/mailman/listinfo/analytics >>> >>> _______________________________________________ >>> Analytics mailing list >>> Analytics@lists.wikimedia.org >>> https://lists.wikimedia.org/mailman/listinfo/analytics >>> >>> _______________________________________________ >>> Analytics mailing list >>> Analytics@lists.wikimedia.org >>> https://lists.wikimedia.org/mailman/listinfo/analytics >>> >>> _______________________________________________ >>> Analytics mailing list >>> Analytics@lists.wikimedia.org >>> https://lists.wikimedia.org/mailman/listinfo/analytics >>> >>> _______________________________________________ >>> Analytics mailing list >>> Analytics@lists.wikimedia.org >>> https://lists.wikimedia.org/mailman/listinfo/analytics >>> >> _______________________________________________ >> Analytics mailing list >> Analytics@lists.wikimedia.org >> https://lists.wikimedia.org/mailman/listinfo/analytics >> > _______________________________________________ > Analytics mailing list > Analytics@lists.wikimedia.org > https://lists.wikimedia.org/mailman/listinfo/analytics >
_______________________________________________ Analytics mailing list Analytics@lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/analytics
