couchbase

问题 I want to get CouchDB running as the backend for my mobile app, replacing SQlite. I have been incredibly confused as a newcomer to this technology because, in addition to all of similar sounding products released by Couchbase last year(Couchbase, Couchbase Single Server, Membase, Couchbase Mobile), they now seem to be dropping/combining all of them into a single project, Couchbase Server. But, that is actually Membase, not CouchDB. To top that off, the creator of CouchDB is no longer going to

问题 Summary: We have a major performance issue with Spring-Boot 2.0.4 and Couchbase server 5.5.1 We are experiencing a rapid decline in DB response time performance when the number of threads is increasing. Here is another report about the issue. In Details: Spring Boot is running with 500 threads: server: tomcat: max-threads: 500 max-connections: 500 We are using the following dependency: <dependency> <groupId>org.springframework.data</groupId> <artifactId>spring-data-couchbase</artifactId>

问题 Is this possible in Couchbase?? SELECT * FROM users WHERE user_name LIKE '%john%'. Seems like I have to use startkey and endkey. But doesn't seem to get the right results. 回答1: The startKey and endKey will allow you to do like "john%". Couchbase does not allow you to do a contains. If you really need a contains you should use the Elastic Search plugin. 回答2: Couchbase 4.5+ only Is needed to create a Full Text Index to be able search for substrings. Log in to the Couchbase Web Console, for

问题 Using https://github.com/couchbase/couchnode @v.1.2.4 Attempting to connect to CouchBase server using the code in the README var couchbase = require('couchbase'); var cluster = new couchbase.Cluster(); var db = cluster.openBucket('default'); db.set('testdoc', {name:'Frank'}, function(err, result) { if (err) throw err; db.get('testdoc', function(err, result) { if (err) throw err; console.log(result.value); // {name: Frank} }); }); but am getting the following error: db.js:2 var cluster = new

问题 I have documents one is dependent to other. first: { "doctype": "closed_auctions", "seller": { "person": "person11304" }, "buyer": { "person": "person0" }, "itemref": { "item": "item1" }, "price": 50.03, "date": "11/17/2001", "quantity": 1, "type": "Featured", "annotation": { "author": { "person": "person8597" } } here you can see doc.buyer.person is dependent to another documents like this: { "doctype": "people", "id": "person0", "name": "Kasidit Treweek", "profile": { "income": 20186.59,

问题 need help with a query in Couchbase enviroment. Both document 1 and document 2 is in the same bucket. First the query will get the document message1 using this query: SELECT uid, message, sent_by FROM bucket USE KEYS "message1" Second, it need to get username from document 2. How can i create a join statement that will fetch username from a given document name, using the query above? Overview Document 1 document name = message1 [ { "uid": "1", "message": "hello", "sent_by": "username" } ]

问题 In couch base URL, e.g. server:port/pools/default what exactly a couch base pool is. Will it always be default or we can change it. There is some text written there http://www.couchbase.com/docs/couchbase-manual-1.8/couchbase-admin-restapi-key-concepts-resources.html but I cannot really get it 100%. Please anyone can explain. 回答1: A long time ago the Couchbase engineers intended to build out a concept of having pools similar to zfs pools, but for a distributed database. The feature isn't dead

问题 Is there a simple way to use spring data couchbase with documents that do not have _class attribute? In the couchbase I have something like this in my sampledata bucket: { "username" : "alice", "created" : 1473292800000, "data" : { "a": 1, "b" : "2"}, "type" : "mydata" } Now, is there any way to define mapping from this structure of document to Java object (note that _class attribute is missing and cannot be added) and vice versa so that I get all (or most) automagical features from spring

问题 Write operations on Couchbase accept a parameter cas (create and set). Also the return result object of any non-data fetching query has cas property in it. I Googled a bit and couldn't find a good conceptual article about it. Could anyone tell me when to use CAS and how to do it? What should be the common work-flow of using CAS ? My guess is we need to fetch CAS for the first write operation and then pass it along with next write. Also we need to update it using result's CAS . Correct me if I

问题 What does this error mean .. It runs fine in Eclipse but not in intellij idea Exception in thread "main" java.lang.VerifyError: Cannot inherit from final class at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631) at java.lang.ClassLoader.defineClass(ClassLoader.java:615) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141) at java.net.URLClassLoader.defineClass(URLClassLoader.java:283) at java.net