Hello.
I'm using cassandra 0.8.6
with nodetool tpstats, dropped statistics are shown.
when drop happens... what can I do?
are there ways to turn on debug messages or to look into?
thanks.
I am running 7 nodes cassandra(v1.0.2) cluster.
I am putting 20K rows per sec to the cluster.
This cluster has 1 KS, 3CFs.
Each CF has 4-5 secondary indices.
After I'v run for 1 week, nodes use swap memory.
I changed disk-access-mode to index_only or standard.
I got strange memory results.
> usin
Hi,
I want to have performance measurement of Cassandra 1.02 using YCSB.
But YCSB only supports Cassandra 0.7.
If someone have knowledge about how to compile Cassandra 1.02 with YCSB or
tips, could please share it with me? Thank you very much.
Regards
Miki
On Thu, Nov 17, 2011 at 10:25 AM, samal wrote:
> >> Edanuff + Beautiful People
>
> I think "row cache" could be the best fit but it can take resource
> depending on row size. It will only touch disk once (first time) in case of
> SST, rest of the req for that row will be served from memory. Try
>
>> Edanuff + Beautiful People
I think "row cache" could be the best fit but it can take resource
depending on row size. It will only touch disk once (first time) in case of
SST, rest of the req for that row will be served from memory. Try
increasing row cache size and decreasing save period to app
Pretty sure data is sent to the coordinating node in DC2 at the same time it is
sent to replicas in DC1, so I would think 10's of milliseconds after the
transport time to DC2.
On Nov 16, 2011, at 3:48 PM, ehers...@gmail.com wrote:
> On a related note - assuming there are available resources acr
Are all of your machines equal hardware? Since those machines are sending data
somewhere, maybe they are behind in replicating and are continuously catching
up?
Use a tool like tcpdump to find out where the data is going
From: Philippe mailto:watche...@gmail.com>>
Reply-To: "user@cassandra.apa
Thanks to samal who pointed to look at the composite columns. I am now
using composite columns names containing username+userId & valueless
column. Thus column names are now unique even for users with same name as
userId is also attached to the same composite col name. Thus the
supercolumn issue is
On a related note - assuming there are available resources across the board
(cpu and memory on every node, low network latency, non-saturated
nics/circuits/disks), what's a reasonable expectation for timing on
replication? Sub-second? Less than five seconds?
Ernie
On Wed, Nov 16, 2011 at 4:00 PM,
Great - thanks Jake
B.
On Wed, Nov 16, 2011 at 8:40 PM, Jake Luciani wrote:
> the former
>
>
> On Wed, Nov 16, 2011 at 3:33 PM, Brian Fleming
> wrote:
>
>>
>> Hi All,
>>
>> I have a question about inter-data centre replication : if you have 2
>> Data Centers, each with a local RF of 2 (i.e. to
To be complete, https://issues.apache.org/jira/browse/CASSANDRA-3472
is relevant.
--
Sylvain
On Wed, Nov 16, 2011 at 9:40 PM, Jake Luciani wrote:
> the former
>
> On Wed, Nov 16, 2011 at 3:33 PM, Brian Fleming
> wrote:
>>
>> Hi All,
>>
>> I have a question about inter-data centre replication :
the former
On Wed, Nov 16, 2011 at 3:33 PM, Brian Fleming wrote:
>
> Hi All,
>
> I have a question about inter-data centre replication : if you have 2 Data
> Centers, each with a local RF of 2 (i.e. total RF of 4) and write to a node
> in DC1, how efficient is the replication to DC2 - i.e. is tha
Hi All,
I have a question about inter-data centre replication : if you have 2 Data
Centers, each with a local RF of 2 (i.e. total RF of 4) and write to a node
in DC1, how efficient is the replication to DC2 - i.e. is that data :
- replicated over to a single node in DC2 once and internally replic
On Mon, Nov 14, 2011 at 2:49 PM, Giannis Neokleous
wrote:
> Hello everyone,
>
> We're using the bulk loader to load data every day to Cassandra. The
> machines that use the bulkloader are diferent every day so their IP
> addresses change. When I do "describe cluster" i see all the unreachable
> no
Hello ,
I need to load an external SSTABLEs to a cluster with 4 nodes. So I shutdown
one of the node , and created a separate folder on this node as a temporary
staging place for the external sstables, and run the sstableloader command like:
./bin/sstableloader /cassandra/bulk_load/Timeseries
+1
Sent from my iPhone
On Nov 16, 2011, at 8:09 AM, Peter Lin wrote:
> I just wanted to say thanks to the entire Cassandra Team and Hector
> client team for CQL.
>
> I've been using it this week and it makes life easier. At first I had
> mixed feelings on CQL, but after using it the last few d
I just wanted to say thanks to the entire Cassandra Team and Hector
client team for CQL.
I've been using it this week and it makes life easier. At first I had
mixed feelings on CQL, but after using it the last few days, the "user
friendly" factor makes a huge difference.
peter
Hi,
I am trying to find out how to use CQL to be able to use cassandra-jdbc in my
application, and I have some questions.
I have tried to find the answers int the documentation of Cassandra Query
Language (CQL) v2.0, but I did not find the answers to my following questions.
How do I create a c
I think secondary index could do the trick.
However, if you need to provide the pagination function, I will go for
Konstantin's
solution.
On Wed, Nov 16, 2011 at 10:27 PM, Konstantin Naryshkin wrote:
> Or just have two column families to do it: A CF idToName that has the
> userIds as keys and
Or just have two column families to do it: A CF idToName that has the
userIds as keys and the userName as the only column and a CF nameToId
that has the userNames as keys and the userId as the only column
On Mon, Nov 14, 2011 at 03:50, chovatia jaydeep
wrote:
> Check if Cassandra secondary index
Try this it should work..
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
public class InsertData {
public static void main(String[] args) throws ClassNotFoundException,
SQLException{
Cl
Dne 15.11.2011 22:04, Mick Semb Wever napsal(a):
But another node (on the same machine but different cluster), even after
an upgrade to the staging 1.0.3 and a `nodetool scrub`, always soaks all
available memory (up to and plateau at 30G). In fact no cf there use
compression anymore.
I had simila
Hi,
I downloaded the cassandra-jdbc and built with maven.
And when I am trying to use it in my application I get an exception on the
following code:
java.sql.Connection conn =
DriverManager.getConnection("jdbc:cassandra://localhost:9160/MyKeyspace");
java.lang.IncompatibleClassChangeError: Im
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