Hi,
I have a cassandra datastore as follows:
key:{
supercol (utf8) : {
subcol (timuuid) : data
}
}
Now, for a particular usecase I want to do slice on 2 levels. Firstly
on supercols & then from the selected supercols results slice subcols
(mostly to restrict no of items fetched in mem). I ha
Hi!
I like the new feature of making live schema updates. You can add, drop and
rename columns and keyspaces via thrift, but how do you modify column
attributes like key_cache_size or rows_cached?
Thank you.
You can change these attrs using JMX interface. Take a look at
org.apache.cassandra.tools.NodeProbe setCacheCapacities method.
Hi - has anyone made any progress with this issue? We are having the same
problem with our Cassandra nodes in production. At some point a node (and
sometimes all 3) will jump to 100% CPU usage and stay there for hours until
restarted. Stack traces reveal several threads in a seemingly endless loop
Hi
I am using 0.7.0-beta1 , and trying to get the contrib/client_only
example to work.
I am running cassandra on host1, and trying to access it from host2.
When using thirft (via cassandra-cli) and in my application; I am able
to connect and do all operations as expected.
But I am not a
But you'll loose these settings after Cassandra restart.
-Original Message-
From: Oleg Anastasyev [mailto:olega...@gmail.com]
Sent: Thursday, September 16, 2010 11:21 AM
To: user@cassandra.apache.org
Subject: Re: 0.7 live schema updates
You can change these attrs using JMX interface. Tak
Hello,
I have a few questions about indexing and locking in Cassandra:
- if I understood well only row level indexing exists prior to v0.7. I mean
only the primary keys are indexed. Is that true?
- is it possible to use composite primary keys? For instance I have a user
object: User(name,birthda
Hello,
> I have a few questions about indexing and locking in Cassandra:
> - if I understood well only row level indexing exists prior to v0.7. I mean
> only the primary keys are indexed. Is that true?
Yes and no. The row name is the key which you use to fetch the row
from cassandra. There are m
Thanks for your fast answer.
Regarding to the composite keys: that's what I thought by default I just needed
some confirmation. Unfortunately I can not use this approach in our application
so I will figure out something else.
I will check out Zookeeper to see if I can use it.
Thanks again!
Hel
I discovered some problems with the fat client earlier this week when
I tried using it. It needs some fixes to keep up with all the 0.7
changes.
Gary.
On Thu, Sep 16, 2010 at 05:48, Asif Jan wrote:
>
> Hi
> I am using 0.7.0-beta1 , and trying to get the contrib/client_only example
> to work.
>
beta-2 will include the ability to set these values and others. Look
for the system_update_column_family() and system_update_keyspace()
methods.
Gary.
On Thu, Sep 16, 2010 at 02:38, Marc Canaleta wrote:
> Hi!
> I like the new feature of making live schema updates. You can add, drop and
> rename
Alvin - assuming I understand what you're after correctly, why not make a CF
Name_Address(name, address). Modifying the Cassandra methods to do the "join"
you describe seems like overkill to me...
-Paul
On Sep 15, 2010, at 7:34 PM, Alvin UW wrote:
Hello,
I am going to build an index to join t
Hi,
I am trying out the latest trunk version and I get an error when
starting Cassandra with -Xmx3G:
Fatal error: memtable_operations_in_millions must be a positive double
I guess it is caused by line 76 in org/apache/cassandra/config/Config.java [0]:
public Integer memtable_throughput_in_mb
On Thu, Sep 16, 2010 at 11:00 AM, Thomas Boucher wrote:
> Hi,
>
> I am trying out the latest trunk version and I get an error when
> starting Cassandra with -Xmx3G:
> Fatal error: memtable_operations_in_millions must be a positive double
>
> I guess it is caused by line 76 in org/apache/cassandra
Guys,
I am trying to build a debian package in order to deploy Cassandra 0.6.5 on
Ubuntu. I see that you have a ./debian directory in the source builds, do you
have a bit more background on how it is used and build?
P.S. I am new to Ubuntu/Debian packaging so any type of pointer will help.
Th
Hi Francois,
Any reason http://wiki.apache.org/cassandra/DebianPackaging isn't working
for you?
Dave Viner
On Thu, Sep 16, 2010 at 10:30 AM, Francois Richard wrote:
> Guys,
>
>
>
> I am trying to build a debian package in order to deploy Cassandra 0.6.5 on
> Ubuntu. I see that you have a ./de
Hi,
I am using Casandra 0.7 trunk (r997357) and am having issues with a
secondary index.
I have a ColumnFamily with a secondary index on column "X". Not every row of
data has column X. It looks like when I write a row that does not have
column X, Cassandra throws the following NPE when it writes
Hello Francois,
There are already .debs available here:
http://wiki.apache.org/cassandra/DebianPackaging
I've also setup a PPA to build the packages on Ubuntu here:
https://launchpad.net/~cassandra-ubuntu/+archive/stable
Its currently still at v0.6.4, but I am in the process of uploading 0.6.
AFAIK there is no way to get a list of the super columns, without also getting the sub columns. I do not know if there is a technical reason that would prevent this from being added. In general it's more efficient to make 1 request that pulls back more data, than two or more than pull back just eno
Thanks Clint,
I am going to look-up the links below, I am pretty new on the DEB packaging in
general and from what I have seen so far, a lot of the tutorial on the web are
mostly based on classic [ .configure | make | make install ] of an application
built in C. In this case I wanted to figure
ok, did something about the message service changed in the initClient
method; essentially now one can not call initClient when a cassandra
instance is running on the same machine.
thanks
On Sep 16, 2010, at 3:48 PM, Gary Dusbabek wrote:
I discovered some problems with the fat client earlier
Thanks to driftx from cassandra IRC channel for helping out.
This was resolved by increasing the rpc timeout for the bootstrap process.
On Wed, Sep 15, 2010 at 11:43 AM, Gurpreet Singh
wrote:
> This problem still stays unresolved despite numerous restarts to the
> cluster. I cant seem to find a w
On Sep 16, 2010, at 2:03 PM, Francois Richard wrote:
> Thanks Clint,
>
> I am going to look-up the links below, I am pretty new on the DEB packaging
> in general and from what I have seen so far, a lot of the tutorial on the web
> are mostly based on classic [ .configure | make | make install
Hi,
I have a few questions and was looking for an answer.
I have a cluster of 7 Cassandra 0.6.5 nodes in my test setup. RF=2. Original
data size is about 100 gigs, with RF=2, i see the total load on the cluster
is about 200 gigs, all good.
1. I was looking to increase the RF to 3. This process e
What the thrift version cassandra 0.7 beta uses?
--
Best regards,
Ivy Tang
It doesn't use a specific version - it uses a specific subversion revision.
The revision number is appended to the thrift jar in the cassandra lib folder.
On Sep 16, 2010, at 9:10 PM, Ying Tang wrote:
> What the thrift version cassandra 0.7 beta uses?
>
> --
> Best regards,
>
> Ivy Tang
>
>
So the thrift.lib will maybe change while the cassandra is updating?
On Thu, Sep 16, 2010 at 10:36 PM, Jeremy Hanna
wrote:
> It doesn't use a specific version - it uses a specific subversion revision.
> The revision number is appended to the thrift jar in the cassandra lib
> folder.
>
> On Sep 1
On Thu, Sep 16, 2010 at 3:19 PM, Gurpreet Singh
wrote:
> 1. I was looking to increase the RF to 3. This process entails changing the
> config and calling repair on the keyspace one at a time, right?
> So, I started with one node at a time, changed the config file on the first
> node for the keysp
Thanks Benjamin. I realised that, i have reverted using cleanup, got it back
to old state and testing the scenario exactly the way you put it.
On Thu, Sep 16, 2010 at 10:56 PM, Benjamin Black wrote:
> On Thu, Sep 16, 2010 at 3:19 PM, Gurpreet Singh
> wrote:
> > 1. I was looking to increase the
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