Comments on: Cassandra Installation and Configuration

By: schabby

schabby — Wed, 18 Aug 2010 08:24:46 +0000

Hmm, hard to say. Cassandra may not be the silver bullet. Simple Reads/Writes are generally faster than on any comparable Sql database, but complicated queries need to be rewritten in your application logic, especially of you use higher order functions such as joins, grouping, sorting, etc.. And there is no tool that translates SQL queries to the according logic code. So you have to ponder each SQL query whether it easy to be migrated to cassandra.

By: mallikarjun

mallikarjun — Wed, 18 Aug 2010 07:47:32 +0000

Hi,

I have a requirement of using Cassandra in my application. In my application there is one table with lot of data and most of my application uses that table. Due to lot of data,performance of the application is decreasing when i use that table is in Oracle.

So, I have decided to use the Cassandra database for that one table and all other tables in oracle. Lot of business logic is dependent on that table.

No my question is, Can I use the Cassandra for a table which has lot of business logic.

I am unable to implement lot of where clauses for Cassandra database.

Is there any supporting tool to use Cassandra in an efficient way?

Please let me know…
i am in urgency..

Thanks in advance

By Mallik

By: studleylee

studleylee — Sun, 15 Aug 2010 06:01:19 +0000

Worked like a charm on Vista 32bit. Thank you!
I just added 2 lines in cassandra.bat to set my env variables:
set JAVA_HOME=C:\Program Files\Java\jre6
set CASSANDRA_HOME=c:\sand\cassandra

By: Rick

Rick — Sun, 06 Jun 2010 14:58:52 +0000

Hi, i’m waiting the java example too
can you email me if you publish something about it?

is it thrift? something like… i describe my “schema” and then run thrift which provides java related APIs ?

bye

By: Andy

Andy — Tue, 23 Mar 2010 16:05:58 +0000

Hi. Where is promised example?
Here is nice cassandra client http://github.com/rantav/hector

By: paul

paul — Wed, 03 Mar 2010 12:19:15 +0000

nice post! very useful!

By: goodxp

goodxp — Mon, 01 Mar 2010 02:23:32 +0000

I would like to share the detailed steps to setup cassandra on windows – check my blog at
“http://blog.csdn.net/goodxp”.
You can also see how to setup Ruby 1.9.1 with it there.
Dirty fix but working.

By: Prakash

Prakash — Fri, 26 Feb 2010 14:00:38 +0000

Hi, I am getting this error when starting cassandra in windows…

Please help.

D:\cassandra>bin\cassandra
Drive already SUBSTed
The system cannot find the drive specified.
Starting Cassandra Server
Listening for transport dt_socket at address: 8888
Exception in thread “main” java.lang.NoClassDefFoundError: org/apache/cassandra/
service/CassandraDaemon

By: schabby

schabby — Sat, 16 Jan 2010 20:36:50 +0000

Hi, great that you got it sorted out!

Sorry for not answering sooner!

Johannes

By: Aatish

Aatish — Mon, 11 Jan 2010 18:47:29 +0000

Hey, I got it!
The reason I was getting that error “The filename, directory name, or volume label syntax is incorrect.” is because my JAVA_HOME had unnecessary ‘;’ (read as semi-colon). So, when I removed it, that error went away.