datastax-enterprise

问题 I am trying to reindex one of my indexes deleting old data and full-index. When i try to do this. The node immediately goes down, i cannot run nodetool commands such as nodetool status, nodetool tpstats.Also, i cannot see CPU, disk, network. The node is idle. When i look at the processes on my machine, I can see that is cassandra process. my schema.xml like that <field indexed="true" name="key1" stored="true" type="StrField"/> <field indexed="true" name="key2" stored="true" type="StrField"/>

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 The DSE documentation says this to disable vnodes but I believe it is in the context of setting up a new cluster. Can vnodes be disabled on an existing cluster without loss of data? Is there a procedure for this? Disabling virtual nodes¶ To disable virtual nodes: In the cassandra.yaml file, set num_tokens to 1. num_tokens: 1 Uncomment the initial_token property and set it to 1 or to the value of a generated token > for a multi-node cluster. 回答1: According to the answer that I received from

问题 We have vertex which will store various jobs and their types and counts as properties. I have to group by the status and their counts. I tried the following query which works for one property(receiveCount) g.V().hasLabel("Jobs").has("Type",within("A","B","C")).group().by("Type").by(fold().match(__.as("p").unfold().values("receiveCount").sum().as("totalRec")).select("totalRec")).next() I wanted to give 10 more properties like successCount, FailedCount etc.. Is there a better way to give that?

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

问题 I am setting up a Java Spark application and am following the Datastax documentation on getting started with the Java API. I've added <dependencies> <dependency> <groupId>com.datastax.spark</groupId> <artifactId>spark-cassandra-connector-java_2.10</artifactId> <version>1.1.1</version> </dependency> ... </dependencies> and (a previously installed dse.jar to my local Maven repository) <dependency> <groupId>com.datastax</groupId> <artifactId>dse</artifactId> <version>version number</version> <

问题 we are using Datastax Enterprize edition. We are running a 2 node cluster. We get the message: After restarting of OpsCentre node getting below error. 2017-03-20 14:49:45,819 [opscenterd] ERROR: Unhandled error in Deferred: There are no clusters with name or ID 'tracking' File "/usr/share/opscenter/lib/py/twisted/internet/defer.py", line 1124, in _inlineCallbacks result = g.send(result) File "/usr/share/opscenter/jython/Lib/site-packages/opscenterd/WebServer.py", line 523, in

问题 I'm using DSE 5.1 (spark 2.0.2.6 and cassandra 3.10.0.1652) My Cassandra table: CREATE TABLE ks.tbl ( dk int, date date, ck int, val int, PRIMARY KEY (dk, date, ck) ) WITH CLUSTERING ORDER BY (date DESC, ck ASC); with the following data: dk | date | ck | val ----+------------+----+----- 1 | 2017-01-01 | 1 | 100 1 | 2017-01-01 | 2 | 200 My code must read this data and write the same thing but with yesterday's date (it compiles successfully): package com.datastax.spark.example import com

问题 I have created a new DataStax Enterprise Cluster that is managed using OpsCenter. All versions used are the latest available from the package repository. The agents have been installed and everything is working perfectly, including RAM Usage, CPU Load, etc. I have added over 90 GB to this cluster without a problem and the hosts can support a lot more.. It is clearly an OpsCenter / DataStax-Agent issue from what I can see. I do not see a relevant line in the log files of either OpsCenter or