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Michael McCandless commented on LUCENE-2312: -------------------------------------------- bq. We could add a flag that forces TOVC to compare RAM reader(s)' field caches by value? Looks like we'll have to do something like that. It's sort of like mixing StringOrdValComp with StringValComp on a segment by segment basis. Ie for flushed segments it can use ord but for still-in-RAM segments it cannot. Maybe we add a supportsOrd() to the FC entry? > Search on IndexWriter's RAM Buffer > ---------------------------------- > > Key: LUCENE-2312 > URL: https://issues.apache.org/jira/browse/LUCENE-2312 > Project: Lucene - Java > Issue Type: New Feature > Components: Search > Affects Versions: Realtime Branch > Reporter: Jason Rutherglen > Assignee: Michael Busch > Fix For: Realtime Branch > > Attachments: LUCENE-2312-FC.patch, LUCENE-2312.patch > > > In order to offer user's near realtime search, without incurring > an indexing performance penalty, we can implement search on > IndexWriter's RAM buffer. This is the buffer that is filled in > RAM as documents are indexed. Currently the RAM buffer is > flushed to the underlying directory (usually disk) before being > made searchable. > Todays Lucene based NRT systems must incur the cost of merging > segments, which can slow indexing. > Michael Busch has good suggestions regarding how to handle deletes using max > doc ids. > https://issues.apache.org/jira/browse/LUCENE-2293?focusedCommentId=12841923&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#action_12841923 > The area that isn't fully fleshed out is the terms dictionary, > which needs to be sorted prior to queries executing. Currently > IW implements a specialized hash table. Michael B has a > suggestion here: > https://issues.apache.org/jira/browse/LUCENE-2293?focusedCommentId=12841915&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#action_12841915 -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online. --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org