cassandra-2.0 Questions
17
Solved
I have built Cassandra server 2.0.3, then run it. It is starting and then stopped with messages:
X:\MyProjects\cassandra\apache-cassandra-2.0.3-src\bin>cassandra.bat >log.txt
java.lang.Runti...
Snowdrift asked 19/12, 2013 at 20:23
4
Solved
I have full access to the Cassandra installation files and a PasswordAuthenticator configured in cassandra.yaml. What do I have to do to reset admin user's password that has been lost, while keepin...
Groundsheet asked 23/8, 2013 at 9:7
4
Solved
I used USE billKeyspace; to enter a keyspace and start using it. Now I want to exit this keyspace and enter another keyspace. How to do that?
If I use exit; or quit; it exits out of cql session it...
Torsk asked 4/1, 2017 at 16:31
3
Hi I just added a new column Business_sys to my table my_table:
ALTER TABLE my_table ALTER business_sys TYPE set<text>;
But again I just droped this column name because I wanted to change...
Mosier asked 21/3, 2016 at 6:54
4
I have a 2 node apache cassandra (2.0.3) cluster with rep factor of 1. I change rep factor to 2 using the following command in cqlsh
ALTER KEYSPACE "mykeyspace" WITH REPLICATION = { 'class' : 'Sim...
Erection asked 31/7, 2014 at 16:53
6
Solved
I was wondering if someone has tried to build a cassandra docker image with default keyspace, I've tried to do it on BUILD time but it doesn't work because cassandra is not running in that phase. I...
Heterodyne asked 27/8, 2015 at 16:8
3
I am starting to learn cassandra and downloaded the file from the Apache Cassandra. When I navigated through the bin folder of the apache-cassandra-2.2.1/bin and run the command cassandra it gives ...
Kamilahkamillah asked 13/9, 2015 at 2:30
3
Solved
I am trying to insert a simple row into the table. Can someone point out what is happening here ?
CREATE TABLE recommendation_engine_poc.user_by_category (
game_category text,
customer_id text,...
Inflect asked 20/8, 2015 at 11:35
3
Solved
I read about Cassandra 2's lightweight transactions. Is the consistency level of such a write always at QUORUM? Would this mean that even if I have a multi data center setup with 100s of nodes, the...
Denoting asked 27/7, 2014 at 23:12
3
I have the following table defined in Cassandra 2.0.9:
CREATE TABLE history
(
histid uuid,
ddate text, -- Day Date, i.e. 2014-11-20
valtime timestamp, -- value time
val text, --value
PRIMARY ...
Brigettebrigg asked 27/1, 2015 at 15:45
2
We have a 12 node cluster with 2 datacenters(each DC has 6 nodes) with RF-3 in each DC.
We are planning to increase cluster capacity by adding 3 nodes in each DC(total 6 nodes).
What is the best ...
Postulate asked 17/5, 2016 at 18:9
2
I have a cassandra cluster with multiple data centres. I want to archive data monthly and purge that data. There are numerous articles of backing up and restoring but not where its mentioned to arc...
Hoyt asked 7/9, 2015 at 10:13
11
Solved
This is a super basic question but it's actually been bugging me for days. Is there a good way to obtain the equivalent of a COUNT(*) of a given table in Cassandra?
I will be moving several hundr...
Adaiha asked 28/10, 2014 at 23:13
2
Solved
Cassandra does not comply with ACID like RDBMS but CAP. So Cassandra picks AP out of CAP and leaves it to the user for tuning consistency.
I definitely cannot use Cassandra for core banking transac...
Cable asked 25/5, 2016 at 10:11
3
I'm using Cassandra 2.0.9 for store quite big amounts of data, let's say 100Gb, in one column family. I would like to export this data to CSV in fast way. I tried:
sstable2json - it produces quit...
Corby asked 22/7, 2014 at 19:38
4
Solved
I am new to Cassandra and I want to install it. So far I've read a small article on it.
But there one thing that I do not understand and it is the meaning of 'node'.
Can anyone tell me what a 'no...
Caprification asked 11/2, 2015 at 14:35
2
Solved
I am using spark 1.3.1 prebuild version spark-1.3.1-bin-hadoop2.6.tgz
Exception in thread "main" java.lang.NoSuchMethodError:
scala.Predef$.$conforms()Lscala/Predef$$less$colon$less; at
org.ap...
Carioca asked 20/5, 2015 at 6:50
3
Solved
I'm having trouble understanding / finding information about how various quorums are calculated in cassandra.
Let's say I have a 16 node cluster using Network Topology Strategy across 2 data cente...
Delfinadelfine asked 28/7, 2015 at 18:3
4
Solved
The problem that I am having is that I want to run the following command (and I can't):
cqlsh < cql_directory/cql_create_stuff.cql
Because I have not logged in to cqlsh.
So I logged in:
cql...
Mandle asked 19/3, 2014 at 3:7
3
Solved
How to implement auditing for cassandra data?
I am looking for a open source option.
Are there any features of cassandra that help with auditing?
Can I use triggers to log the records into a table...
Eluvium asked 10/7, 2014 at 19:9
3
Solved
I am new to Cassandra. I am reading about the num_tokens parameter for virtual nodes in the cassandra.yml file. I don't think I quite understand what this is doing or how tokens/partitions are assi...
Burglarious asked 15/11, 2013 at 7:3
3
Solved
I wonder why nodetools don't know the percentage of the ring handeld by my node...
I created this keyspace with
CREATE KEYSPACE mykeyspace WITH replication = {'class': 'SimpleStrategy',
'repl...
Overprint asked 28/4, 2015 at 14:4
2
I'm thinking of creating a multi-tenant app using Apache Cassandra.
I can think of three strategies:
All tenants in the same keyspace using tenant-specific fields for security
table per tenant ...
Consummate asked 21/11, 2018 at 7:33
4
Solved
How can I get list of all column families in keyspace in Cassandra using CQL 3?
Overscore asked 29/3, 2014 at 17:15
2
Solved
How to set Cassandra (>2.0) JVM heap size of 8GB? When I type in free -m it gives me the following. How can I set the Cassandra JVM heap size to 8GB?
total used free shared buffers cached
Mem: 16...
Perren asked 12/1, 2016 at 13:47
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