Hi, we have other questions about rdbms and query engine. About RDBMS - we tried to run unit test on my postgres and seems to work but only if i use oak methods such as update and remove. We'd like to use jcrRepository to start our ECM management but doesn't work (can you see previous mail). Could you confirm us this scenario () ? Could you give us other examples on RDBMS that use jcrRepository ?
About query Engine - Could you explain more in deep what traverse is ? If we have understood, Treverse doesn't delegate to index server engine (good in case of index server trouble) but is built in component in oak: but where keep repository graph to Traverse ? In memory ? on filesystem ? getting data from db ? - we have to manage a potentially large amount of documents so we need more than a node, so is it possibile clustering lucene ? Thanks in advance, best regards -----Messaggio originale----- Da: Davide Giannella [mailto:dav...@apache.org] Inviato: mercoledì 2 marzo 2016 18:12 A: oak-dev@jackrabbit.apache.org Oggetto: Re: Critical questions about OAK On 01/03/2016 15:33, Ancona Francesco wrote: > ...2. Oak esplicitally doesn'i index anything so what's happens > when i search a document (or node) the first time ? (this is not > clear) > > a. The search is delegated always on index server (lucene > embedded or solr) return a resultset of nodes that match the query. > Oak never delegates to any persistence. It relies on its own query engine. Oak provides, 4 main index types: traverse, property, lucene and solr. If no index is defined, or no one is suitable for the provided query, the Traverse will come to play. It's a built-in index always there that will traverse the repository in search for the content complying with the query you provided. You define the index you need. Please read my previous email where I explained in more details the "doesn't index anything" aspect as well as the docs around the query engine. They may not explain how the query engine works but provides enough details for not having to read the code http://markmail.org/message/wvq7ggu737ex277b http://jackrabbit.apache.org/oak/docs/query/query.html > b. So mongodb (or RDBMS) is used only to render the metadata or > content binary > > 3. If i want better performance or i want want full text search > i have to create some indexes (3 type of indexes lucene, solr and > property of nodes) that improve efficiency of index server (lucene or > solr). These indexes don't have effect on RDBMS or mongodb in which > these kind of metadata are stored > If you need full-text capabilities, the only two indexes that provides it are Lucene and Solr. I'd go for lucene if you don't need any solr specific feature. You'll need to define your own index. You can find details in the docs http://jackrabbit.apache.org/oak/docs/query/query.html HTH Davide ************************************************************************************ This footnote confirms that this email message has been scanned by PineApp Mail-SeCure for the presence of malicious code, vandals & computer viruses. ************************************************************************************
