With cassandra an update is equivalent to an insert
Cyril Scetbon
Le 14 janv. 2014 à 08:38, David Tinker david.tin...@gmail.com a écrit :
We never delete rows but we do a lot of updates. Is that where the
tombstones are coming from?
I had taken latest source code of cassandra trunk to evaluate performance
of indexing on collections new feature(
https://issues.apache.org/jira/browse/CASSANDRA-4511) for my usecase..
IF you configure table like this with commands in given order :
CREATE TABLE testcollectionindex(userid text,
Hi guys,
i have some issues with an application on a cassandra multinode cluster.
I need help to understand what is going on.
here is the stack trace of my application.
2014-01-16 12:33:14,176 - root - ERROR -
2014-01-16 12:33:14,176
You can't change the name of a column family. Instead of using
alter_column_family(), use drop_column_family() and then recreate it with a
different name use create_column_family().
On Tue, Jan 14, 2014 at 1:27 PM, Kumar Ranjan winnerd...@gmail.com wrote:
Hey folks,
I used
Do you see any errors in the system.log for DSE/Cassandra?
On Thu, Jan 16, 2014 at 9:19 AM, Amalrik Maia amal...@s1mbi0se.com.brwrote:
Hi guys,
i have some issues with an application on a cassandra multinode cluster.
I need help to understand what is going on.
here is the stack trace of my
Read the upgrade best practices
http://www.datastax.com/docs/1.1/install/upgrading#best-practices
You cannot change partitioner
http://www.datastax.com/documentation/cassandra/1.2/webhelp/cassandra/architecture/architecturePartitionerAbout_c.html
On Thu, Jan 16, 2014 at 2:04 AM, Or Sher
Any pointers? I am planning to do rolling restart of the cluster nodes to
see if it will help.
On Jan 15, 2014 2:59 PM, Narendra Sharma narendra.sha...@gmail.com
wrote:
RF=3.
On Jan 15, 2014 1:18 PM, Andrey Ilinykh ailin...@gmail.com wrote:
what is the RF? What does nodetool ring show?
On
Please include the output of nodetool ring, otherwise no one can help you.
On Thu, Jan 16, 2014 at 12:45 PM, Narendra Sharma narendra.sha...@gmail.com
wrote:
Any pointers? I am planning to do rolling restart of the cluster nodes to
see if it will help.
On Jan 15, 2014 2:59 PM, Narendra
Hi,
I am new to Cassandra Environment, does the order of the ring matter, as
long as the member joins the group?
Yogi
On Thu, Jan 16, 2014 at 12:49 PM, Jonathan Haddad j...@jonhaddad.com wrote:
Please include the output of nodetool ring, otherwise no one can help
you.
On Thu, Jan 16,
It depends on a lot of factors. If you've got all your machines in a
single rack, probably not. But if you want to spread your data across
multiple racks or availability zones in AWS, it makes a huge difference.
On Thu, Jan 16, 2014 at 2:05 PM, Yogi Nerella ynerella...@gmail.com wrote:
Hi,
Here is the nodetool ring output.
Address DC RackStatus State Load
Effective-Ownership Token
148873535527910577765226390751398592512
10.3.1.179 datacenter1 rack1 Up Normal 752.53 GB
37.50% 0
10.3.1.29 datacenter1 rack1
I have following understanding about Cassandra read repair:
Read Repair is an automatic process that reads from more nodes than necessary
during a normal read and checks and repairs differences in the background. It’s
different to “repair” or Anti Entropy that you run with nodetool repair.
But i am getting error: Bad Request: Key may not be empty
My guess is the trigger is trying to create a row with an empty key.
Add some logging to the trigger to see what it’s doing.
Cheers
-
Aaron Morton
New Zealand
@aaronmorton
Co-Founder Principal Consultant
Apache
Look at the logs for the cassandra servers, are nodes going down ?
Are there any other errors ?
Check for log messages about GCInspector, if there is a lot of GC nodes will
start to flap up and down.
It sounds like there is stability issue with cassandra, look there first to
make sure it is
Can you confirm that, cause we'll add a new DC with version 1.2.13
(read-only) and we'll upgarde other DCs to 1.2.13 weeks later. We made some
tests and didn't notice anything. But we didn't test a node failure
Depending on the other version you may not be able to run repair. All nodes
have
I don't know. How do I find out? The only mention about query plan in
Cassandra I found is your article on your site, from 2011 and considering
version 0.8.
See the help for TRACE in cqlsh
My general approach is to solve problems with the read path by making changes
to the write path. So I
c3.4xlarge
long par new on a machine like this is not normal.
Do you have a custom comparator or are you using triggers ?
Do you have a data model that creates a lot of tombstones ?
Try to return the settings to default and then tune from there, that includes
returning to the default JVM GC
I have an app that stores lots of bits of text in Cassandra. One of
the things I need to do is keep a global word frequency table.
Something like this:
CREATE TABLE IF NOT EXISTS word_count (
word text,
count value,
PRIMARY KEY (word)
);
This is slow to read as the rows (100's of thousands
18 matches
Mail list logo
