Use a filter query to filter out all the documents marked deleted. Don’t use “expunge deletes”, it does more than you want because it forces a merge. Just commit after sending the delete.
wunder Walter Underwood wun...@wunderwood.org http://observer.wunderwood.org/ (my blog) > On Jan 26, 2018, at 8:55 AM, Clemens Wyss DEV <clemens...@mysign.ch> wrote: > > Thx Emir! > >> You are thinking too RDMS > maybe the DBQ "missled" me 😉 > >> The best you can do is select and send updates as a single bulk > how can I do "In-Place Updates" > (https://lucene.apache.org/solr/guide/6_6/updating-parts-of-documents.html#UpdatingPartsofDocuments-In-PlaceUpdates) > from/through SolrJ? > >> Also use DBQ with caution - it does not work well with concurrent updates > we "prevent" this through sequentialization (per core ) > > Why do I want to do all this (dumb things)? The context is as follows: > when a document is deleted in an index/core this deletion is not immediately > reflected in the searchresults. Deletions at not really NRT (or has this > changed?). Till now we "solved" this brutely by forcing a commit (with > "expunge deletes"), till we noticed that this results in quite a "heavy > load", to say the least. > Now I have the idea to add a "deleted"-flag to all the documents that is > filtered on on all queries. > When it comes to deletions, I would upate the document's deleted flag and > then effectively delete it. For single deletion this is ok, but what if I > need to re-index? > > -----Ursprüngliche Nachricht----- > Von: Emir Arnautović [mailto:emir.arnauto...@sematext.com] > Gesendet: Freitag, 26. Januar 2018 17:31 > An: solr-user@lucene.apache.org > Betreff: Re: SolrClient#updateByQuery? > > Hi Clemens, > You are thinking too RDMS. You can use query to select doc, but how would you > provide what are updated doc? I guess you could use this approach only for > incremental updates or with some scripting language. That is not supported at > the moment. The best you can do is select and send updates as a single bulk. > > Also use DBQ with caution - it does not work well with concurrent updates. > > HTH, > Emir > -- > Monitoring - Log Management - Alerting - Anomaly Detection Solr & > Elasticsearch Consulting Support Training - http://sematext.com/ > > > >> On 26 Jan 2018, at 17:10, Clemens Wyss DEV <clemens...@mysign.ch> wrote: >> >> SolrClient has the method(s) deleteByQuery (which I make use of when I need >> to reindex). >> #updateByQuery does nicht exist. What if I want to "update all documents >> matching a query"? >> >> >> Thx >> Clemens >
