datastax

问题 While adding existing cluster in OpsCenter I receive an error: ERROR: Agent for XXX.XXX.XXX.XXX was unable to complete operation (http://XXX.XXX.XXX.XXX:61621/snapshots/pit/properties?): java.lang.IllegalArgumentException: No implementation of method: :make-reader of protocol: #'clojure.java.io/IOFactory found for class: nil On agent there is an error: java.lang.IllegalArgumentException: No implementation of method: :make-reader of protocol: #'clojure.java.io/IOFactory found for class: nil at

问题 I have multiple datacenters. One of them is Cassandra other one is Solr datacenter. I already started upgrading process. Still 1 node is being upgrading since "upgradesstables" command have been taking for 4 days. I want to add new cassandra datacenter and i dont have time to wait upgrading process is done. Can i add new cassandra datacenter with version 5.0.2 while there is upgrading process is going on. 回答1: Although you can run a cluster in a partially upgraded state, it is a transient

问题 I have these table CREATE TABLE user_info ( userId uuid PRIMARY KEY, userName varchar, fullName varchar, sex varchar, bizzCateg varchar, userType varchar, about text, joined bigint, contact text, job set<text>, blocked boolean, emails set<text>, websites set<text>, professionTag set<text>, location frozen<location> ); create table publishMsg ( rowKey uuid, msgId timeuuid, postedById uuid, title text, time bigint, details text, tags set<text>, location frozen<location>, blocked boolean,

问题 We are setting up consistency level, LOCAL_QUORUM as default. We are using this at the time of Cluster building in config - Cluster.builder().addContactPoints(environment.getProperty("cassandra.contact-points").split(",")).withPort(port) .withQueryOptions( new QueryOptions().setConsistencyLevel(ConsistencyLevel.valueOf(environment.getProperty("cassandra.consistency-level"))) .setSerialConsistencyLevel(ConsistencyLevel.valueOf(environment.getProperty("cassandra.consistency-level"))))

问题 I need to get avg and count for given dataframe and need to get previously stored avg and count from Cassandra table values for each company. Then need to calculate avg and count and persist back into the Cassandra table. How can I do it for each company ? I have two dataframe schemas as below ingested_df |-- company_id: string (nullable = true) |-- max_dd: date (nullable = true) |-- min_dd: date (nullable = true) |-- mean: double (nullable = true) |-- count: long (nullable = false) cassandra

问题 @Test public void testWriteUpdateRead() throws Exception { Cluster cluster = Cluster.builder() .addContactPoint("127.0.0.1") .build(); Session cs = cluster.connect(); cs.execute("DROP KEYSPACE if exists readtest;"); cs.execute("CREATE KEYSPACE readtest WITH replication " + "= {'class':'SimpleStrategy', 'replication_factor':1};"); cs.execute("create table readtest.sessions(" + "id text primary key," + "passwordHash text," + ");"); for (int i = 0; i < 1000; i++) { String sessionID = UUID

问题 It seems that in both approaches the vertex is stored and can be retrieved properly later. Common configuration: DseCluster dseCluster = DseCluster.builder() .addContactPoint("192.168.1.43") .build(); DseSession dseSession = dseCluster.connect(); GraphTraversalSource g = DseGraph.traversal( dseSession, new GraphOptions().setGraphName("graph") ); Approach 1: Vertex v = g.addV("User").property("uuid","testuuid231").next(); Approach 2: GraphStatement graphStatement = DseGraph

问题 I am using vagrant/puppet to configure a VM with Apache Cassandra. Local access (via cqlsh ) works, but not remote access. Here is my Vagrantfile # -*- mode: ruby -*- # vi: set ft=ruby : Vagrant.configure("2") do |config| config.vm.box = 'ubuntu/trusty32' config.vm.define "dev" do |dev| dev.vm.hostname = "devbox" dev.vm.network :private_network, ip: "192.168.10.200" end config.vm.provision "puppet" do |puppet| puppet.module_path = "puppet/modules" puppet.manifests_path = "puppet/manifests"

问题 if someone has some experience in using UDT (User Defined Types), I would like to understand how the backward compatibility would work. Say I have the following UDT CREATE TYPE addr ( street1 text, zip text, state text ); If I modify "addr" UDT to have a couple of more attributes (say for example zip_code2 int, and name text): CREATE TYPE addr ( street1 text, zip text, state text, zip_code2 int, name text ); how does the older rows that does have these attributes work? Is it even compatible?

问题 I tried reading up on datastax blogs and documentation but could not find any specific on this Is there a way to keep 2 tables in Cassandra to belong to same partition? For example: CREATE TYPE addr ( street_address1 text, city text, state text, country text, zip_code text, ); CREATE TABLE foo ( account_id timeuuid, data text, site_id int, PRIMARY KEY (account_id) }; CREATE TABLE bar ( account_id timeuuid, address_id int, address frozen<addr>, PRIMARY KEY (account_id, address_id) ); Here I