On Wed, Nov 12, 2014 at 5:19 PM, cass savy casss...@gmail.com wrote:
Sstableloader works well for large tables if you want to move data from
Cassandra to Cassandra. This works if both C* are on the same version.
Sstable2json and json2sstable is another alternative.
This post is getting a bit
Hi Jonathan,
Thank you very much, it worked this way.
On Thu, Nov 13, 2014 at 12:07 AM, Jonathan Haddad j...@jonhaddad.com wrote:
With Cassandra you're going to want to model tables to meet the
requirements of your queries instead of like a relational database where
you build tables in 3NF
Here's another post which is pretty comprehensive for this topic.
http://informationsurvival.blogspot.com/2014/02/cassandra-cql3-integration.html
[image: datastax_logo.png]
Jonathan Lacefield
Solution Architect | (404) 822 3487 | jlacefi...@datastax.com
[image: linkedin.png]
There is a ReleaseVersion attribute in the
org.apache.cassandra.db:StorageService bean
---
Chris Lohfink
On Wed, Nov 12, 2014 at 5:57 PM, Michael Shuler mich...@pbandjelly.org
wrote:
On 11/12/2014 04:58 PM, Michael Shuler wrote:
On 11/12/2014 04:44 PM, Otis Gospodnetic wrote:
Is there a
This is interesting. If I do a SELECT release_version from system.local; on
my system it's telling me that I'm using 2.1.1
[root@beta-new:/usr/local/apache-cassandra-2.1.2] #cqlsh
Connected to Jokefire Cluster at beta-new.jokefire.com:9042.
[cqlsh 5.0.1 | Cassandra 2.1.1 | CQL spec 3.2.0 | Native
So sstableloader is a cpu efficient online method of loading data if you
already have sstables.
An option you may not have considered is just using batch inserts. It was a
surprise to me coming from another
database system, but C*'s primary use case is shoving data to an append
only log. Is there
Hi,
we use Cassandra to store some association type of data. For example, store
user to course (course registrations) association and user to school
(school enrollment) association data. The schema for these two types of
associations are the same. So there are two options to store the data:
1. Put
Performance will be the same. There's no performance benefit to using
multiple keyspaces.
On Thu Nov 13 2014 at 8:42:40 AM Li, George guangxing...@pearson.com
wrote:
Hi,
we use Cassandra to store some association type of data. For example,
store user to course (course registrations)
That's not necessarily true. You don't need to split them into separate
keyspaces, but separate tables may have some advantages. For example, in
Cassandra 2.1, compaction and index summary management are optimized based
on read rates for SSTables. If you have different read rates or patterns
Tables, yes, but that wasn't the question. The question was around using
different keyspaces.
On Thu Nov 13 2014 at 9:17:30 AM Tyler Hobbs ty...@datastax.com wrote:
That's not necessarily true. You don't need to split them into separate
keyspaces, but separate tables may have some
On Wed, Nov 12, 2014 at 2:44 PM, Otis Gospodnetic
otis.gospodne...@gmail.com wrote:
Hi,
Is there a way to detect which version of Cassandra one is running?
Is there an API for that, or a constant with this value, or maybe an MBean
or some other way to get to this info?
Here's the use
Hi,
we have two datacenter with those inof:
Cassandra version 2.1.0
DC1 with 5 nodes
DC2 with 5 nodes
we set the snitch to GossipingPropertyFileSnitch and in
cassandra-rackdc.properties we put:
in DC1:
dc=DC1
rack=RAC1
in DC2:
dc=DC2
rack=RAC1
and in every node's cassandra.yaml we define two
On Thu, Nov 13, 2014 at 10:26 AM, Adil adil.cha...@gmail.com wrote:
Hi,
we have two datacenter with those inof:
Cassandra version 2.1.0
DC1 with 5 nodes
DC2 with 5 nodes
we set the snitch to GossipingPropertyFileSnitch and in
cassandra-rackdc.properties we put:
in DC1:
dc=DC1
yeh we started nodes one at timemy doubt is if we should configure alse
cassandra-topology.properties or not? we leave it with default vlaues
2014-11-13 21:05 GMT+01:00 Robert Coli rc...@eventbrite.com:
On Thu, Nov 13, 2014 at 10:26 AM, Adil adil.cha...@gmail.com wrote:
Hi,
we have two
Are you sure that both DC's can communicate with each other over the
necessary ports?
On Thu, Nov 13, 2014 at 3:46 PM, Adil adil.cha...@gmail.com wrote:
yeh we started nodes one at timemy doubt is if we should configure
alse cassandra-topology.properties or not? we leave it with default
Hi
I configured TLS encryption for cqlsh and cassandra (open source). I now
have to do it for DataStax Enterprise. I found the cassandra.yaml file
(for DSE, .dse-4.5.3/resources/cassandra/conf. Same changes as
previously..but not the same results.
Any pointers?
Regards
Danie
Hi There,
I have a question about Cassandra node repair, there is a function called
forceTerminateAllRepairSessions();, so will the function terminate all the
repair session in only one node, or it will terminate all the session in a
ring? And when it terminates all repair sessions, does it
I’m trying to figure out the best way to handle things like set appends
(and other CQL extensions) in traditional OR mapping.
Our OR mapper does basic setFoo() .. then save() to write the record back
to the database.
So if foo is a Sett then I can set all members.
But I want to do some appends
I’m struggling with this wide row business. Is there an upward limit on the
number of columns you can have?
Adaryl Bob Wakefield, MBA
Principal
Mass Street Analytics
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
The theoretical limit is maybe 2 billion but recommended max is around 10-20
thousand.
Br,
Hannu
On 14.11.2014, at 8.10, Adaryl Bob Wakefield, MBA
adaryl.wakefi...@hotmail.com wrote:
I’m struggling with this wide row business. Is there an upward limit on the
number of columns you can
You can have up to 2 billion columns but there are some considerations.
This article might be of some help.
http://www.ebaytechblog.com/2012/08/14/cassandra-data-modeling-best-practices-part-2/#.VGWdT4enCS0
We have 380k of them in some of our rows and it's ok.
-- Original Message --
From: Hannu Kröger hkro...@gmail.commailto:hkro...@gmail.com
To: user@cassandra.apache.org
user@cassandra.apache.orgmailto:user@cassandra.apache.org
Sent: 14.11.2014 16:13:49
Subject: Re: how wide can wide rows
can i scan collection (list, set) paged by limit?
Alternatively build a SetWrapper that extends the Java sets interface and
intercepts calls to add(), addAll(), remove()
For each of these method, the SetWrapper will generate an appropriate
UPDATE statement. This is more general purpose than just an AppendSet.
TTL is another story, it is
We have up to a few hundreds of millions of columns in a super wide row.
There are two major issues you should care about.
1. the wider the row is, the more memory pressure you get for every slice
query
2. repair is row based, which means a huge row could be transferred at
every repair
1 is not
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