Thanks Robert,
you are right, I upgraded to 2.0.1 and don't fix the problem, 2 of 3 nodes
raise the same error after 30 minutes.
I will try to create a new cluster 1.2 and copy data, can you tell me
please the best pratice to do this, do i have to use sstable2json /
json2sstable or other method.
New to Cassandra and struggling to get DSE server started. Any help is
appreciated! Thanks so much!
...
INFO 21:04:08,568 Initializing system.Schema
INFO 21:04:08,576 Initializing system.schema_keyspaces
INFO 21:04:08,582 Initializing system.range_xfers
INFO 21:04:08,587 Initializing system.H
Hello,
I am new to the cassandra world and would like to know if it is
possible to open multiple namespaces from a single program. I am using the
libQtCassandra library. Is it possible to open multiple namespaces and
multiple tables and store different data into different contexts and tables
Has anyone used Cassandra with Spring 3.x? I've just downloaded the
Datastax Java driver documentation.
Are there any issues in doing this? I know Springsource has not yet
officially integrated Cassandra support.
Thanks.
Les
So I just saw a post about how Kundera translates all JPQL to CQL.
On Mon, Oct 21, 2013 at 4:45 PM, Jon Haddad wrote:
> If you're working with CQL, you don't need to worry about the column
> names, it's handled for you.
>
> If you specify multiple keys as part of the primary key, they become
>
What if you plan on using Kundera and JPQL and not CQL?
Les
On Oct 21, 2013 4:45 PM, "Jon Haddad" wrote:
> If you're working with CQL, you don't need to worry about the column
> names, it's handled for you.
>
> If you specify multiple keys as part of the primary key, they become
> clustering key
If you're working with CQL, you don't need to worry about the column names,
it's handled for you.
If you specify multiple keys as part of the primary key, they become clustering
keys and are mapped to the column names. So if you have a sensor_id /
time_stamp, all your sensor readings will be i
So looking at Patrick McFadin's data modeling videos I now know about using
compound keys as a way of partitioning data on a by-day basis.
My other questions probably go more to the storage engine itself. How do
you refer to the columns in the wide row? What kind of names are assigned
to the colum
So it turned out the DataStax java client round-robins servers by default,
which made periodic huge latencies. Switching to
DCAwareRoundRobinPolicy solved the problem.
Another question is how do you get the local DC name? The application can
parse conf/cassandra-topology.properties manually, but s
We ran a Cassandra LAN party once with a mixed environment.
http://www.datastax.com/dev/blog/cassandra-nyc-lan-party
This was obviously a trivial setup. I think areas of concern would if you
have column families located on different devices and streaming related
issues. It might work just fine how
We want to migrate hundred gigabytes cluster from winows to linux without
operation interruption. I.e. node by node.
вторник, 22 октября 2013 г. пользователь Jon Haddad писал:
> I can't imagine any situation where this would be practical. What would
> be the reason to even consider this?
>
> On
Technical reason is "path separator", which is different on linux and
windows. If you would search through maling list, you would have found
evidence it does not work and it is not supported.
But, the most recent notice I have found was about 0.7 and there was no
jira bug number. Just "unsupported
fyi.
-- Forwarded message --
From: Vivek Mishra
Date: Tue, Oct 22, 2013 at 1:33 AM
Subject: {kundera-discuss} Kundera 2.8 released
To: "kundera-disc...@googlegroups.com"
Hi All,
We are happy to announce the release of Kundera 2.8 .
Kundera is a JPA 2.0 compliant, object-datas
On Fri, Oct 18, 2013 at 3:27 PM, Arindam Barua wrote:
> Is step 1 just to reduce downtime for the node?
>
Yes.
> Also, I’m assuming the initial_token of the new node should be set to be
> the same as the token of the old node, or close to that. Eg. [1] in
> “Replacing a Dead Node” talks about
I can't imagine any situation where this would be practical. What would be the
reason to even consider this?
On Oct 21, 2013, at 11:06 AM, Robert Coli wrote:
> On Mon, Oct 21, 2013 at 12:55 AM, Илья Шипицин wrote:
> is mixed linux/windows cluster configuration supported in 1.2 ?
>
> I don't
We have a 6 node cassandra 1.2.10 cluster running on aws with
NetworkTopologyStrategy, a replication factor of 3 and the EC2Snitch. Each
AWS availability zone has 2 nodes in it.
When we are reading or writing data with consistency of Quorum to the
cluster while decommissioning a node we are gettin
On Mon, Oct 21, 2013 at 12:55 AM, Илья Шипицин wrote:
> is mixed linux/windows cluster configuration supported in 1.2 ?
>
I don't think it's officially supported in any version; you would be among
a very small number of people operating in this way. However there is no
technical reason it "shoul
On Mon, Oct 21, 2013 at 2:17 AM, Kais Ahmed wrote:
> We have recently run in production a new cluster C* 2.0.0 with 3 nodes RF
> 3.
>
https://engineering.eventbrite.com/what-version-of-cassandra-should-i-run/
"What Version of Cassandra Should I Run in Production?"
If I were you I would probabl
Stupid cell phone.
I would say no. If you design around row cache and your data access
patterns change, the original assertions may be invalidated and the
performance might be worst then the simple design.
On Mon, Oct 21, 2013 at 12:03 PM, Edward Capriolo wrote:
> I would say no. If you design
An easy way to test this would be to run stress or some other tool at a
slow rate of inserts and watch the tables flush and compact naturally.
On Tuesday, October 8, 2013, Sameer Farooqui wrote:
> Hmm, good point. I'll test this out again and see the compaction behavior
is as expected given the r
Je suis absent(e) du bureau jusqu'au 28/10/2013
Remarque : ceci est une réponse automatique à votre message "Re: Is read
performance improved by moving more volatile data to different CF?" envoyé
le 21/10/2013 18:03:29.
C'est la seule notification que vous recevrez pendant l'absence de cett
I would say no. If you design around row cache and your data acceas
patterns change your assertions will be invalidates and your performance
may be worst over time.
I would use the kiss here. Keep it a smple usng one column family.
Experiement with size teired vs leveled compaction.
On Thursday,
I am not sure what you are working on will have an effect. You can not
actually control the way the operating system seeks data on disk. The io
scheduling is done outside cassandra. You can try to write the code in an
optimistic way taking phyical hardware into account, but then you have to
conside
Hi all,
We have recently run in production a new cluster C* 2.0.0 with 3 nodes RF 3.
After 7 days, we seen on log this error on one node :
ERROR [FlushWriter:216] 2013-10-07 07:11:46,538 CassandraDaemon.java (line
186) Exception in thread Thread[FlushWriter:216,5,main]
java.lang.AssertionError
Hello!
is mixed linux/windows cluster configuration supported in 1.2 ?
Cheers,
Ilya Shipitsin
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