From Michael Laing - posted on the wrong thread :
We use Alain's solution as well to make major operational revisions.
We have a red team and a blue team in each AWS region, so we just add
and drop datacenters to get where we want to be.
Pretty simple.
2015-03-31 15:50 GMT+02:00 Alain
Hi, I have 2 cassandra clusters.
cluster1 is datastax community 2.1
cluster2 is datastax DSE
I can run sstableloader from cluster1(Community) and stream data to
cluster2 (DSE)
But I get exception while streaming from cluster2 (DSE) to cluster1
(Community)
The expection is:
Could not retrieve
Hi bharat,
you are talking about Cassandra 1.2.5 Does it fit Cassandra 2.1?
Were there any significant changes to SSTable format and layout?
Thank you, article is interesting.
Hi jacob jacob.rho...@me.com,
HBase does it for example. http://hbase.apache.org/book.html#_hfile_format_2
It would be
Sorry
cluster1 community version is: ii cassandra 2.1.3
distributed storage system for structured data
cluster2 DSE version is: ii dse-libcassandra4.6.2-1
The DataStax Enterprise package includes a production-certifie
2015-04-01 14:53 GMT+02:00 Serega Sheypak
CVE-2015-0225: Apache Cassandra remote execution of arbitrary code
Severity: Important
Vendor:
The Apache Software Foundation
Versions Affected:
Cassandra 1.2.0 to 1.2.19
Cassandra 2.0.0 to 2.0.13
Cassandra 2.1.0 to 2.1.3
Description:
Under its default configuration, Cassandra binds an
Hi,
I am new to Cassandra. I have setup a cluster with Cassandra 2.0.13. I am
writing the same data in HBase and Cassandra and find that the writes are
extremely slow in Cassandra and frequently seeing exception “Cassandra timeout
during write query at consistency ONE. The cluster size for
Amlan,
Can you provide information on how much data is being written? Are any of the
columns really large? Are any writes succeeding or are all timing out?
Regards,
Eric R Medley
On Apr 1, 2015, at 9:03 AM, Amlan Roy amlan@cleartrip.com wrote:
Hi,
I am new to Cassandra. I have
Hi!
We need to implement a union field in our cassandra data model and we're
using the datastax Mapper. Anyone have any recommendations for doing
this? I'm thinking something like:
public class Value {
int dataType;
String valueAsString;
double valueAsDouble;
}
If the Value is a String,
Also, can you provide the table details and the consistency level you are using?
Regards,
Eric R Medley
On Apr 1, 2015, at 9:13 AM, Eric R Medley emed...@xylocore.com wrote:
Amlan,
Can you provide information on how much data is being written? Are any of the
columns really large? Are
Hi Eric,
Thanks for the reply. Some columns are big but I see the issue even when I stop
storing the big columns. Some of the writes are timing out, not all. Where can
I find the number of writes to Cassandra?
Regards,
Amlan
On 01-Apr-2015, at 7:43 pm, Eric R Medley emed...@xylocore.com
Hi,
My requirement is to design a table for historical state information (not
exactly time-series). For ex: I have devices connecting and disconnecting
to the management platform. I want to know the details such as (name, mac,
os, image, etc.) for all devices connected to the management platform
Did not see any exception in cassandra.log and system.log. Monitored using
JConsole. Did not see anything wrong. Do I need to see any specific info? Doing
almost 1000 writes/sec.
HBase and Cassandra are running on different clusters. For cassandra I have 6
nodes with 64GB RAM(Heap is at
Using the datastax driver without batch.
http://www.datastax.com/documentation/developer/java-driver/2.1/java-driver/whatsNew2.html
On 01-Apr-2015, at 9:15 pm, Brian O'Neill b...@alumni.brown.edu wrote:
Are you using the storm-cassandra-cql driver?
Are HBase and Cassandra running on the same servers? Are the writes to each of
these databases happening at the same time?
Regards,
Eric R Medley
On Apr 1, 2015, at 10:12 AM, Brice Dutheil brice.duth...@gmail.com wrote:
And the keyspace? What is the replication factor.
Also how are the
Replication factor is 2.
CREATE KEYSPACE ct_keyspace WITH replication = {
'class': 'NetworkTopologyStrategy',
'DC1': '2'
};
Inserts are happening from Storm using java driver. Using prepared statement
without batch.
On 01-Apr-2015, at 8:42 pm, Brice Dutheil brice.duth...@gmail.com wrote:
And the keyspace? What is the replication factor.
Also how are the inserts done?
On Wednesday, April 1, 2015, Amlan Roy amlan@cleartrip.com wrote:
Write consistency level is ONE.
This is the describe output for one of the tables.
CREATE TABLE event_data (
event text,
week text,
Write consistency level is ONE.
This is the describe output for one of the tables.
CREATE TABLE event_data (
event text,
week text,
bucket int,
date timestamp,
unique text,
adt int,
age listint,
arrival listtimestamp,
bank text,
bf double,
cabin text,
card text,
carrier
Are you using the storm-cassandra-cql driver?
(https://github.com/hmsonline/storm-cassandra-cql)
If so, what version?
Batching or no batching?
-brian
---
Brian O'Neill
Chief Technology Officer
Health Market Science, a LexisNexis Company
215.588.6024 Mobile @boneill42
Hi.
The documentation suggests to use the replace_address startup
parameter for replacing a dead node. However, it doesn't motivate why
this is superior over adding a new node and retiring the dead one
using nodetool removenode.
I assume it can be more efficient since the new node can take over
Are you seeing any exceptions in the cassandra logs? What are the loads on your
servers? Have you monitored the performance of those servers? How many writes
are you performing at a time? How many writes per seconds?
Regards,
Eric R Medley
On Apr 1, 2015, at 9:40 AM, Amlan Roy
I will be writing an event when device connects. Probably a device never
disconnects till current time, and I want to return that device for that
time range.
Device disconnect is used to mark the end time; Any query beyond that time
should not return that device.
Queries can have adhoc start and
Unfortunately I'm using 2.1.2. Is it possible that I downgrade to 2.0.13
without wiping out the data? I'm worrying about if there is a bug in 2.1.2.
On Tue, Mar 31, 2015 at 4:37 AM, Paulo Ricardo Motta Gomes
paulo.mo...@chaordicsystems.com wrote:
What version of Cassandra are you running?
In both cases node needs to bootstrap and get data frm other nodes. Removenode
has an additional cost as it will lead to additional redistribution of tokens
such that all data resides on remaining nodes as per the replication strategy.
On removenode, remaining nodes will stream data amongst
On Wed, Apr 1, 2015 at 9:26 AM, Ulrich Geilmann
ulrich.geilm...@freiheit.com wrote:
I assume it can be more efficient since the new node can take over the
exact tokens of the dead node. Are there any other differences?
That's the reason. You get one streaming operation (bootstrap a new node
On Wed, Apr 1, 2015 at 8:37 AM, Amlan Roy amlan@cleartrip.com wrote:
Replication factor is 2.
It is relatively unusual for people to use a replication factor of 2, for
what it's worth.
=Rob
Firdousi,
What kind of events would be stored in the table? Will you be writing an event
when a device connects and another when it disconnects or will you write a
single event after the device finally disconnects? Also, for your queries, do
you want ad-hoc start and end times or do you have a
Are you writing multiple cf at same time?
Please run nodetool tpstats to make sure that FlushWriter etc doesnt have high
All time blocked counts. A Blocked memtable FlushWriter may block/drop writes.
If thats the case you may need to increase memtable flush writers..if u have
many secondary
On 04/01/2015 08:10 AM, Serega Sheypak wrote:
Sorry
cluster1 community version is: ii cassandra 2.1.3
distributed storage system for structured data
cluster2 DSE version is: ii dse-libcassandra4.6.2-1
The DataStax Enterprise package includes a
Got it.
2015-04-01 20:39 GMT+02:00 Michael Shuler mich...@pbandjelly.org:
On 04/01/2015 08:10 AM, Serega Sheypak wrote:
Sorry
cluster1 community version is: ii cassandra 2.1.3
distributed storage system for structured data
cluster2 DSE version is: ii
What type of snitch are you using for cassandra.yaml: endpoint_snitch ?
PropertyFileSnitch can improve performance.
- bharat
On Tue, Mar 31, 2015 at 1:59 PM, daemeon reiydelle daeme...@gmail.com
wrote:
What is your replication factor?
Any idea how much data has to be processed under the
Hi Serega,
Most of the content in the blog article is still relevant. After 1.2.5
(ic), there are only three new versions (ja, jb, ka) for SSTable format.
Following are the changes in these versions.
// ja (2.0.0): super columns are serialized as composites
(note that there is no real
All servers are running ntpd. I guess the time should be synced across all
servers.
My dataset is too large to use sstable2json. It would take long time.
I will try to repair to see if the issue is gone.
On Tue, Mar 31, 2015 at 7:49 AM, Ken Hancock ken.hanc...@schange.com
wrote:
Have you
Very interesting. I had saved your email from three years ago in hopes of
an elegant answer. Thanks for sharing!
Jim
On Tue, Mar 31, 2015 at 8:16 AM, Alain RODRIGUEZ arodr...@gmail.com wrote:
People keep asking me if we finally found a solution (even if this is 3+
years old) so I will just
33 matches
Mail list logo
