Re: Cassandra data model right definition

2017-03-28 Thread Oskar Kjellin
It's not that easy as I recall this email thread https://groups.google.com/forum/m/#!topic/nosql-databases/ZLdgwCT_PNU /Oskar > On 30 Sep 2016, at 18:40, Carlos Alonso wrote: > > Cassandra is a Wide Column Store http://db-engines.com/en/system/Cassandra > > Carlos Alonso | Software Engineer

Re: /etc/init.d/cassandra for RHEL

2017-03-28 Thread I PVP
i tried using the https://github.com/apache/cassandra/blob/trunk/redhat/cassandra won’t start using my own values and it is not generating logs at all. had you ever saw this behavior before? JAVA_HOME is properly set the user and group cassandra exist cassandra:cassandra is the owner of the /o

Re: /etc/init.d/cassandra for RHEL

2017-03-28 Thread Michael Shuler
On 03/28/2017 10:53 PM, Michael Shuler wrote: > On 03/28/2017 09:36 PM, I PVP wrote: >> any recommend /etc/init.d/cassandra for RHEL when installing it from >> apache-cassandra-3.10-bin.tar.gz ? >> >> i goggled it but could not find anything that seems to be "proven" >> > > https://github.com/apac

Re: /etc/init.d/cassandra for RHEL

2017-03-28 Thread Michael Shuler
On 03/28/2017 09:36 PM, I PVP wrote: > any recommend /etc/init.d/cassandra for RHEL when installing it from > apache-cassandra-3.10-bin.tar.gz ? > > i goggled it but could not find anything that seems to be "proven" > https://github.com/apache/cassandra/blob/trunk/redhat/cassandra -- Kind rega

Re: Cassandra: Key-value or Column?

2017-03-28 Thread Andrey Ilinykh
yes, cassandra is a key-value. you can think about it as a wide row storage ( row key, column key) -> value On Tue, Mar 28, 2017 at 10:19 AM, Les Hartzman wrote: > I was doing some research on different NoSQL DBs and found this article at > Datastax, https://academy.datastax.com/planet-cassandra

2.1 to 3.0 upgrade problems

2017-03-28 Thread Eric Yablonowitz
We just upgraded our 33 node cluster from 2.0.10 to 2.1.15 to 3.0.12. The upgrade from 2.0.10 to 2.1.15 went very smoothly - both the rolling software update and the subsequent ‘nodetool upgradesstables’. However we have had a number of issues with the 3.0.12 upgrade: The first issue we notic

/etc/init.d/cassandra for RHEL

2017-03-28 Thread I PVP
any recommend /etc/init.d/cassandra for RHEL when installing it from apache-cassandra-3.10-bin.tar.gz ? i goggled it but could not find anything that seems to be "proven"

Cassandra: Key-value or Column?

2017-03-28 Thread Les Hartzman
I was doing some research on different NoSQL DBs and found this article at Datastax, https://academy.datastax.com/planet-cassandra/what-is-nosql In it it states that Cassandra is a key-value store and not a column (wide-column) store. So my question is why? Is the document in error or is there som

Maximum memory usage reached in cassandra!

2017-03-28 Thread Mokkapati, Bhargav (Nokia - IN/Chennai)
Hi Cassandra users, I am getting "Maximum memory usage reached (536870912 bytes), cannot allocate chunk of 1048576 bytes" . As a remedy I have changed the off heap memory usage limit cap i.e file_cache_size_in_mb parameter in cassandra.yaml from 512 to 1024. But now again the increased limit g