I am facing a problem connecting to aster data nCluster on Cloudera?
Is it possible using sqoop?
Related
So for the past couple of days, I've been trying to establish a connection between SAP BW and Microsoft PowerBI. I'm establishing the connection between the two systems using the driver (HDBODBC) provided in the HANA Suit.
Using the connection provided in PowerBI I was able to establish a connection between the two systems. The user used to create the connection was a DB level user created by our BASIS consultant. This use has sa access to the DB.
I want to stress on the fact that application level users couldn't connect to this so we had to create a DB level user and connect tot he DB Server of HANA instead of the Application Server of SAP BW.
The problem occurs when I try to browse and view data available in HANA queries, Composite Providers and Cubes.
I want to know if there is a configuration/authorization that has to be assigned in the application level to rectify this error?
Thanks in Advance
I'm new to Cassandra and R. When I'm connecting to Cassandra database using RCassandra package, connection is establishing. But When trying to use any keyspace, R is not responding. I used the following statements.
c <- RC.connect('192.168.1.20', 9042)
RC.use(c, 'effesensors')
Please give me a brief idea about how to use RCassandra to avoid this problem.
Are you aware that you may be using a non default port for Cassandra? If you can provide the Cassandra version and RStudio version I may be able to update my answer. I found this tutorial by tarkalabs useful as a checklist of steps to take before any connection is attempted.
From the tutorial,
Now connect to your database with connect.handle <-
RC.connect(host="127.0.0.1", port=9160)
Cassandra by default listens to port 9160 but you can change it
according to your configuration. To show the cluster type into your
prompt RC.cluster.name(connect.handle)
Just to verify that you are connected and your Cassandra instance is running try the following command:
RC.describe.keyspaces(connect.handle)
That should bring back a list of the settings in your keyspaces. If nothing returns, you are either not connected or your Cassandra instance is not properly installed.
EXAMPLE OUTPUT
$system_traces$strategy_options
replication_factor
"2"
$system_traces$cf_defs
named list()
$system_traces$durable_writes
[1] TRUE
Let me know what your results are if my answer does not work and I will update my answer. Good Luck!
make use of RODBC instead of using RCassandra. We need to install Cassandra ODBC driver.
Thanks #D. Venkata Naresh, your suggestion of using RODBC driver resolved my issue.
I am using R and datastax cassandra community edition.
This is the link I followed to configure the ODBC driver in my windows machine.
https://www.datastax.com/dev/blog/using-the-datastax-odbc-driver-for-apache-cassandra
Then, in my R studio, These are the commands to connect and fetch from the Cassandra
install.packages("RODBC")
library("RODBC")
require("RODBC")
conn <- odbcConnect(<ODBC datasource name>)
dataframe <- sqlFetch(conn, <column family / table name>)
dataframe
Hope, this answer helps someone who is facing issue with RCassandra.
I read your comments above, you are using the wrong port. You should run the following command
c <- RC.connect('192.168.1.20', 9160)
This will definitely work for you.
I want to connect Tableau software to my cassandra database. Note that i'm using tableau in windows7 and cassandra in ubuntu (Virtual machine).
For this i've installed the Cassandra ODBC (and Simba cassandra ODBC but i got the same problem). I got a connexion succes and i found my keyspace but not my tables !!!!!!
But no table in "cim" keyspace !!
Note that in my keyspace "cim" i have 3 tables that i can request with any problem in cassandra. Is there something i should do before creating the ODBC driver ???
Thank you for your help
The ODBC driver as it stands currently uses thrift so won't be able to communicate directly with cql3 to display the table names. Describe commands also won't work. However, you should still be able to select data from your tables. Updates to the ODBC driver should provide cql3 support at some point in the new year.
Update Simba ODBC driver for Cassandra supports CQL3 and solves your problem.
http://www.simba.com/connectors/apache-cassandra-odbc
I'm trying to connect OBIEE to Impala. Where I try my test, I encounter a problem that I can't
resolved,here comes my steps:
download the Cloudera latest Impala ODBC driver for windows,and import metadata from impala,I can finally successfully see data in Admin Tools like this:
upload the rpd file to the server,and download cloudera impala odbc driver for linux,and configure it,in the end ,I can do it like this which shows I have configure the driver successfully:
I try to create new analysis through 【Create Direct Database Request】 to test weather I can successfully connect Impala, but I can never connect it due to the reason like this,I can never fingure out why:
Is there anybody successfully do it or tell me how I can resolve the problem? Thanks!
I recommend connecting directly to Hive instead. According to Oracle's documentation Impala connectivity is not directly supported. OBIEE is built connect to Hive and Impala is not referenced:
http://docs.oracle.com/cd/E28280_01/bi.1111/e10540/deploy_rpd.htm#BABGIAJH
I am trying to connect to an iHistorian Database. This database is a product of GE and it records process control information. Anyway, this database is configured with OLE DB drivers. I am curious if there is a way to connect to this database with R. Currently, R has a package called RODBC, but this package only connects to ODBC. Any suggestions would be helpful.
Thanks