Re: How can I delete the entire contents of the index?
deletequery*:*/query/delete will leave you a fresh index On Thu, Sep 23, 2010 at 12:50 AM, xu cheng xcheng@gmail.com wrote: deletequerythe query that fetch the data you wanna delete/query/delete I did like this to delete my data best regards 2010/9/23 Igor Chudov ichu...@gmail.com Let's say that I added a number of elements to Solr (I use Webservice::Solr as the interface to do so). Then I change my mind and want to delete them all. How can I delete all contents of the database, but leave the database itself, just empty? Thanks i
Re: How can I delete the entire contents of the index?
Quick tangent... I went to the link you provided, and the delete part makes sense. But the next tip, how to re-index after a schema change. What is the point of step 5. Send an optimize/ command. ? Why do you need to optimize an empty index? Or is my understanding of Optimize incorrect? -- View this message in context: http://lucene.472066.n3.nabble.com/How-can-I-delete-the-entire-contents-of-the-index-tp1565548p1567640.html Sent from the Solr - User mailing list archive at Nabble.com.
RE: How can I delete the entire contents of the index?
Because even after you've deleted every document from the index, there are still actually index _files_ on disk taking up space. Lucene organizes it's files for quick access, and a consequence of this is that deleting a document does not neccesarily reclaim the disk space. Optimize will reclaim that disk space. For deleting ALL documents in your index there's actually a shortcut though. Delete the entire solr 'data' directory and restart Solr, Solr will recreate the data directory with starter index files. (Note you have to delete the directory itself, if you just delete all the files inside it, Solr will get unhappy). I am somewhat suspicious of doing this and would never do it on a production index, but for just development playing around where it's not that disastrous if something goes wrong, it's a lot lot quicker than an actual delete command followed by an optimize. From: kenf_nc [ken.fos...@realestate.com] Sent: Thursday, September 23, 2010 8:22 AM To: solr-user@lucene.apache.org Subject: Re: How can I delete the entire contents of the index? Quick tangent... I went to the link you provided, and the delete part makes sense. But the next tip, how to re-index after a schema change. What is the point of step 5. Send an optimize/ command. ? Why do you need to optimize an empty index? Or is my understanding of Optimize incorrect? -- View this message in context: http://lucene.472066.n3.nabble.com/How-can-I-delete-the-entire-contents-of-the-index-tp1565548p1567640.html Sent from the Solr - User mailing list archive at Nabble.com.
Re: How can I delete the entire contents of the index?
Lucene has an API for very fast deletion of the index (ie, it removes the files): IndexWriter.deleteAll(). It's part of the transaction, ie, you still must call .commit() to make the change visible to external readers. But I don't know whether this is exposed in Solr... Mike On Thu, Sep 23, 2010 at 8:50 AM, Jonathan Rochkind rochk...@jhu.edu wrote: Because even after you've deleted every document from the index, there are still actually index _files_ on disk taking up space. Lucene organizes it's files for quick access, and a consequence of this is that deleting a document does not neccesarily reclaim the disk space. Optimize will reclaim that disk space. For deleting ALL documents in your index there's actually a shortcut though. Delete the entire solr 'data' directory and restart Solr, Solr will recreate the data directory with starter index files. (Note you have to delete the directory itself, if you just delete all the files inside it, Solr will get unhappy). I am somewhat suspicious of doing this and would never do it on a production index, but for just development playing around where it's not that disastrous if something goes wrong, it's a lot lot quicker than an actual delete command followed by an optimize. From: kenf_nc [ken.fos...@realestate.com] Sent: Thursday, September 23, 2010 8:22 AM To: solr-user@lucene.apache.org Subject: Re: How can I delete the entire contents of the index? Quick tangent... I went to the link you provided, and the delete part makes sense. But the next tip, how to re-index after a schema change. What is the point of step 5. Send an optimize/ command. ? Why do you need to optimize an empty index? Or is my understanding of Optimize incorrect? -- View this message in context: http://lucene.472066.n3.nabble.com/How-can-I-delete-the-entire-contents-of-the-index-tp1565548p1567640.html Sent from the Solr - User mailing list archive at Nabble.com.
Re: How can I delete the entire contents of the index?
: Lucene has an API for very fast deletion of the index (ie, it removes : the files): IndexWriter.deleteAll(). It's part of the transaction, ... : But I don't know whether this is exposed in Solr... Solr definitely has optimized the delete *:* case (but i don't know if it's using the specific method) I believe the poster is getting confused because immediately following this FAQ... http://wiki.apache.org/solr/FAQ#How_can_I_delete_all_documents_from_my_index.3F which says to use deletequery*:*/query/delete which specificly notes: This has been optimized to be more efficient then deleting by some arbitrary query which matches all docs because of the nature of the data. ...was this FAQ... http://wiki.apache.org/solr/FAQ#How_can_I_rebuild_my_index_from_scratch_if_I_change_my_schema.3F ...which until a moment ago gave outdated advice. -Hoss -- http://lucenerevolution.org/ ... October 7-8, Boston http://bit.ly/stump-hoss ... Stump The Chump!
How can I delete the entire contents of the index?
Let's say that I added a number of elements to Solr (I use Webservice::Solr as the interface to do so). Then I change my mind and want to delete them all. How can I delete all contents of the database, but leave the database itself, just empty? Thanks i
Re: How can I delete the entire contents of the index?
deletequerythe query that fetch the data you wanna delete/query/delete I did like this to delete my data best regards 2010/9/23 Igor Chudov ichu...@gmail.com Let's say that I added a number of elements to Solr (I use Webservice::Solr as the interface to do so). Then I change my mind and want to delete them all. How can I delete all contents of the database, but leave the database itself, just empty? Thanks i
Re: How can I delete the entire contents of the index?
On Thu, Sep 23, 2010 at 9:05 AM, Igor Chudov ichu...@gmail.com wrote: Let's say that I added a number of elements to Solr (I use Webservice::Solr as the interface to do so). Then I change my mind and want to delete them all. How can I delete all contents of the database, but leave the database itself, just empty? Not sure what you mean by leave the database itself. Solr is not a normal database, and thus there is not much sense to an empty index. In any case, to delete all entries, see entry 2.7 in the Solr FAQ on the Wiki: http://wiki.apache.org/solr/FAQ#How_can_I_delete_all_documents_from_my_index.3F Regards, Gora
