RE: Support/Consulting companies
http://thelastpickle.com/ From: Roxy Ubi [mailto:roxy...@gmail.com] Sent: Friday, August 19, 2016 2:02 PM To: user@cassandra.apache.org Subject: Support/Consulting companies Howdy, I'm looking for a list of support or consulting companies that provide contracting services related to Cassandra. Is there a comprehensive list somewhere? Alternatively could you folks tell me who you use? Thanks in advance for any replies! Roxy
RE: Validation of Data after data migration from RDBMS to Cassandra
Surbhi, A general note, Cassandra tables are not normalized as in an RDBMS schema, so it’s not straight migration. Best practice is to design your queries and then design your Cassandra schema to support those queries. Patrick McFadin has a series on C* data modeling. http://docs.datastax.com/en/cassandra/2.1 Roger From: Surbhi Gupta [mailto:surbhi.gupt...@gmail.com] Sent: Thursday, August 06, 2015 11:31 AM To: user@cassandra.apache.org Subject: Validation of Data after data migration from RDBMS to Cassandra Hi, We have to migrate the data from Oracle/mysql to Cassandra. I wanted to understand, if we have any tool/utilitiy which can help in validation the data after the data migration to Cassandra. Thanks Surbhi
RE: Validation of Data after data migration from RDBMS to Cassandra
Surbhi Sorry I meant to send the CQL link http://docs.datastax.com/en/cql/3.1/cql/cql_intro_c.html Roger From: Huang, Roger [mailto:rohu...@visa.com] Sent: Thursday, August 06, 2015 11:39 AM To: user@cassandra.apache.org Subject: RE: Validation of Data after data migration from RDBMS to Cassandra Surbhi, A general note, Cassandra tables are not normalized as in an RDBMS schema, so it’s not straight migration. Best practice is to design your queries and then design your Cassandra schema to support those queries. Patrick McFadin has a series on C* data modeling. http://docs.datastax.com/en/cassandra/2.1 Roger From: Surbhi Gupta [mailto:surbhi.gupt...@gmail.com] Sent: Thursday, August 06, 2015 11:31 AM To: user@cassandra.apache.orgmailto:user@cassandra.apache.org Subject: Validation of Data after data migration from RDBMS to Cassandra Hi, We have to migrate the data from Oracle/mysql to Cassandra. I wanted to understand, if we have any tool/utilitiy which can help in validation the data after the data migration to Cassandra. Thanks Surbhi
RE: Problem inserting set when query contains IF NOT EXISTS.
Validimir,
Thanks what version of Cassandra?
-Roger
From: Vladimir Prudnikov [mailto:v.prudni...@gmail.com]
Sent: Monday, January 13, 2014 11:57 AM
To: user
Subject: Problem inserting set when query contains IF NOT EXISTS.
Hi all,
I've spend a lot of time finding a bug in system, but it turns out that the
problem is in Cassandra.
Here is how to reproduce.
=
CREATE KEYSPACE IF NOT EXISTS test_set WITH REPLICATION = { 'class' :
'SimpleStrategy', 'replication_factor' : 1 };
USE test_set;
CREATE TABLE IF NOT EXISTS user (
key timeuuid PRIMARY KEY,
username text,
email text,
first_name text,
last_name text,
features settext,
) WITH caching='all';
INSERT INTO user(key,username,email,first_name,last_name,features) VALUES
(now(),'ainsttp0ess2kiphu2pe1bbrle','l3b7brn6jp9e8s0mmsr7ae5...@mmcm4jf9a9g9b95c053ksbsi18.commailto:l3b7brn6jp9e8s0mmsr7ae5...@mmcm4jf9a9g9b95c053ksbsi18.com','gqh9ekmv6vc9nf1ce8eo3rjcdd','fmg92158br9ddivoj59417q514',{'i6v8i4a5gpnris5chjibllqf0','480m4c1obiq61ilii1g7rm0v17','50kovlifrtrtqihnvmbefaeacl'})
IF NOT EXISTS;
select * from user;
==
The problem here is that user.features is null instead of set of 3 strings.
If you remove `IF NOT EXISTS` it executes correctly and set of string will be
inserted.
I don't see any problem with the queries, seems to be the problem with C*.
--
Vladimir Prudnikov
RE: documentation on PlayOrm released
Dean, What's the URL? -Roger -Original Message- From: Hiller, Dean [mailto:dean.hil...@nrel.gov] Sent: Wednesday, November 07, 2012 7:43 AM To: user@cassandra.apache.org Subject: documentation on PlayOrm released The first set of documentation on PlayOrm is now released. It is also still growing as we have a dedicated person working on more documentation. Check it out when you have a chance. Later, Dean
