What are you trying to achieve?
From: Rahul Bhardwajmailto:rahul.bhard...@indiamart.com
Sent: 1/31/2015 2:05 AM
To: usermailto:user@cassandra.apache.org
Subject: dblink between oracle and cassandra
Hi All,
I want make a dblink from oracle 11g and cassandra
What is the reason for running Cassandra on Ceph? I have both running in my
environment but doing different things - Cassandra as transactional store and
Ceph as block storage for storing files.
From: Janmailto:cne...@yahoo.com
Sent: 2/1/2015 2:53 AM
To:
Is there any specific reason for using Cassandra for search instead of using
something like elastic search Kibana?
From: Janmailto:cne...@yahoo.com
Sent: 1/31/2015 1:08 PM
To: user@cassandra.apache.orgmailto:user@cassandra.apache.org
Subject: Re: Cassandra
Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
On 30/10/2013, at 12:32 am, Baskar Duraikannu baskar.duraika...@outlook.com
wrote:
Aaron
Rack1 goes down and some writes happen in quorum against rack 2 and 3. Hinted
handoff is set to 30 mins. After couple of hours rack1 comes
of nodes. If
you want to be extra safe just run it.
Cheers
-
Aaron Morton
New Zealand
@aaronmorton
Co-Founder Principal Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
On 26/10/2013, at 2:54 pm, Baskar Duraikannu baskar.duraika...@outlook.com
wrote:
We
We are thinking through the deployment architecture for our Cassandra cluster.
Let us say that we choose to deploy data across three racks.
If let us say that one rack power went down for 10 mins and then it came back.
As soon as it came back up, due to some human error, rack1 goes down. Now
We have seen read repair take very long time even for few GBs of data even
though we don't see disk or network bottlenecks. Do you use any specific
configuration to speed up read repairs?
, Baskar Duraikannu wrote:
Good evening. We are using Cassandra for a while. I have been faced
with a question why did facebook drop Cassandra over and over again. I
could not find a good answer to this question on the internet.
Could you please help me with the question?
Quora seems
Good evening. We are using Cassandra for a while. I have been faced with a
question why did facebook drop Cassandra over and over again. I could not
find a good answer to this question on the internet.
Could you please help me with the question?
--RegardsBaskar Duraikannu
I have a similar use case but only need to update portion of the row. We
basically perform single write (with old and new columns) with very low value
of ttl for old columns.
From: jan.algermis...@nordsc.com
Subject: Update-Replace
Date: Fri, 30 Aug 2013 17:35:48 +0200
To:
I don't know of any. I would check the size of LIST. If it is taking long, it
could be just that disk read is taking long.
Date: Sat, 31 Aug 2013 16:35:22 -0300
Subject: Listblob retrieve performance
From: savio.te...@lupa.inf.ufg.br
To: user@cassandra.apache.org
I have a column family with
,no matter which node I ran it from, queries were answered in 600 ms
for consistency level of one.
But when I run the same query with consistency level as Quorum, it is
taking ~2.3 seconds. It feels as if querying of the nodes are in sequence.
Is this normal?
--
Regards,
Baskar Duraikannu
Just adding few other details to my question.
- We are using RandomPartitioner
- 256 virtual nodes configured.
On Wed, Jul 10, 2013 at 12:54 PM, Baskar Duraikannu
baskar.duraikannu...@gmail.com wrote:
I have a 3 node cluster with RF=3. All nodes are running. I have a table
with 39 rows
tokens in the YAML of the new
cluster and then copy sstables?
I know it is a bit ugly but should work.
Sankalp
On Tue, Jul 9, 2013 at 3:19 AM, Baskar Duraikannu
baskar.duraikannu...@gmail.com wrote:
Thanks Aaron
On 7/9/13, aaron morton aa...@thelastpickle.com wrote:
Can I just copy
You can replace USE statement with create statement and then change
use_callback with whatever you want to do next.
--
Thanks,
Baskar Duraikannu
Shubham Mittal smsmitta...@gmail.com wrote:
So, if I want to create a keyspace, what do I need to change in that file?
On Thu, Jul 11, 2013 at 5
system. That process will ensure rows are sent to nodes that are
replicas.
Cheers
-
Aaron Morton
Freelance Cassandra Consultant
New Zealand
@aaronmorton
http://www.thelastpickle.com
On 9/07/2013, at 12:45 PM, Baskar Duraikannu
baskar.duraikannu...@gmail.com wrote:
We
,
Baskar Duraikannu
Good morning. We are thinking of setting up 3 data centers with
NetworkTopologyStrategy with each DC having 1 copy. All three data centers
are going to be connected by dark fiber with 10 ms latency.
Due to network latency, all QUORUM reads and writes will be slower.
Has anyone used this
. Is this normal?
I am running Cassandra 0.8.4 on Cent OS 5.6 ( Kernel 2.6.18.238) and Oracle
JVM.
-
Thanks
Baskar Duraikannu
java.net.SocketOutputStream.socketWrite0
5 0.79% 95.22%1716 301122 java.lang.Object.notify
--
Thanks
Baskar Duraikannu
On Sep 26, 2011, at 4:55 PM, aaron morton wrote:
How are you deciding what is thrift ? Thrift is used to handle connections
and serialize / de-serialize off the wire.
Cheers
of index optimization built into
Cassandra 0.8.
Thanks
Baskar Duraikannu
Thanks Peter.
I believe...I found the root cause. Switch that we used was bad.
Now on a 4 node cluster ( Each Node has 1 CPU - Quad Core and 16 GB of RAM),
I was able to get around 11,000 writes and 10,050 reads per second
simultaneously (CPU usage is around 45% on all nodes. Disk queue size
Thanks Peter. I am using java version of the stress testing tool from the
contrib folder. Is there any issue that should be aware of? Do you recommend
using pystress?
I will rerun tests in order to monitor ethernet stats closely and will update.
--
Thanks,
Baskar Duraikannu
- Original
Thanks Peter.
When I looked at the benchmark client machine, it was not under any stress in
terms of disk or CPU.
But test machines are connected through 10/100 mbps switch port (not gigabit).
Can this be a bottleneck?
Thanks
Baskar
- Original Message -
From: Peter Schuller
To:
We are planning to deploy Cassandra on two data centers. Let us say that we
went with three replicas with 2 being in one data center and last replica in
2nd Data center.
What will happen to Quorum Reads and Writes when DC1 goes down (2 of 3 replicas
are unreachable)? Will they timeout?
load
while you are doing the decommission?
On Apr 12, 2011, at 6:53 PM, Baskar Duraikannu wrote:
I have setup a 4 node cluster for testing. When I setup the cluster, I have
setup initial tokens in such a way that each gets 25% of load and then started
the node with autobootstrap=false
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