I haven't run Cassandra in production myself, but for other high load Java
based servers I've had really good scaling success with OpenSolaris. In
particular I've used Joyent's SmartOS which has the additional advantage
of bursting to cover brief periods of exceptional load.
On Tue, Feb 11,
Hi, Rahul.
I've removed the corrupted sstables and 'nodetool repair' ran successfully for
the column family. I'm not sure whether or not we've lost data.
Best regards,
Francisco Sobral
On Jan 30, 2014, at 3:58 PM, Rahul Menon ra...@apigee.com wrote:
Yes should delete all files related to
We're running a C* cluster with 6 servers spread across the four us-east1
zones.
We also spread our clients (hundreds of them) across the four zones.
Currently we give our clients a connection string listing all six servers
and let C* do its thing.
This is all working just fine...and we're
yes, sure. Taking data from the same zone will reduce latency and save you
some money.
On Wed, Feb 12, 2014 at 10:13 AM, Brian Tarbox tar...@cabotresearch.comwrote:
We're running a C* cluster with 6 servers spread across the four us-east1
zones.
We also spread our clients (hundreds of them)
On Wed, Feb 12, 2014 at 8:55 AM, Jeffrey Kesselman jef...@gmail.com wrote:
I haven't run Cassandra in production myself, but for other high load Java
based servers I've had really good scaling success with OpenSolaris. In
particular I've used Joyent's SmartOS which has the additional
Its quite possible its well tricked out for Linux.
My major issue with Linux has been that its TCP/IP stack is nowhere near as
scalable as Solaris' for massive numbers of simultaneous connections. But
thats probably less of an issue with a Cassandra node then it has been with
the game servers
Also, may be you need to check the read consistency to local_quorum,
otherwise the servers still try to read the data from all other data
centers.
I can understand the latency, but I cant understand how it would save
money? The amount of data transferred from the AWS server to the client
should
Cross zone data transfer does not cost any extra money.
LOCAL_QUORUM = QUORUM if all 6 servers are located in the same logical
datacenter.
Ensure your clients are connecting to either the local IP or the AWS hostname
that is a CNAME to the local ip from within AWS. If you connect to the
Thanks Jonathan,
I have the cfstats but our prod team has changed some configs after my post and
I do not have the cfhistograms information now.
No Of nodes: 3
Ram: 472GB
Cassandra version: 1.2.5
I am pasting the cfstats below.
Regards
Jay
CREATE TABLE EnablerCreditReasonInfo (
key text
Same region, cross zone transfer is $0.01 / GB (see
http://aws.amazon.com/ec2/pricing/, Data Transfer section).
On Wed, Feb 12, 2014 at 3:04 PM, Russell Bradberry rbradbe...@gmail.comwrote:
Cross zone data transfer does not cost any extra money.
LOCAL_QUORUM = QUORUM if all 6 servers are
Not when using private IP addresses. That pricing ONLY applies if you are
using the public interface or EIP/ENI. If you use the private IP addresses
there is no cost associated.
On February 12, 2014 at 3:13:58 PM, William Oberman (ober...@civicscience.com)
wrote:
Same region, cross zone
I think you are mistaken. It is true for the same zone. between zones 0.01/G
On Wed, Feb 12, 2014 at 12:17 PM, Russell Bradberry rbradbe...@gmail.comwrote:
Not when using private IP addresses. That pricing *ONLY *applies if you
are using the public interface or EIP/ENI. If you use the
0.01/G between zones irrespective of IP is correct.
As for your original question, depending on the driver you are using you could
write a custom co-ordinator node selection policy.
For example if you are using the Datastax driver you would extend
We are currently trialling SmartOS with Cassandra and have seen some pretty
good results (and the mmap stuff appears to work). As Rob said, if this is
production cluster, run with linux… there will be far less pain.
If you are super keen on running on something different from linux in
We're definitely using all private IPs.
I guess my question really is: with repl=3 and quorum operations I know
we're going to push/pull bits across the various AZs within us-east-1. So,
does having the client start the conversation with a server in the same AZ
save us anything?
On Wed, Feb
Hello,
After adding a new datacenter with virtual nodes enabled, the output of
nodetool status shows that nodes from the non-vnodes datacenter owns 0.0%
of the data, as shown below:
Datacenter: NonVnodesDC
=
Status=Up/Down
|/ State=Normal/Leaving/Joining/Moving
--
This is normal as nodetool without specifying a keyspace outputs information
for the ring as if it is SimpleStrategy with RF=1. Try specifying a keyspace.
On February 12, 2014 at 4:35:31 PM, Paulo Ricardo Motta Gomes
(paulo.mo...@chaordicsystems.com) wrote:
Hello,
After adding a new
On Wed, Feb 12, 2014 at 1:14 PM, Ben Bromhead b...@instaclustr.com wrote:
An alternate method would be to define the zones as data centres and then
you could leverage existing DC aware policies (We've never tried this
though).
https://issues.apache.org/jira/browse/CASSANDRA-3810
=Rob
On Wed, Feb 12, 2014 at 1:25 PM, Ben Bromhead b...@instaclustr.com wrote:
If you are super keen on running on something different from linux in
production (after all the warnings), run most of your cluster on linux,
then run a single node or a separate DC with SmartOS, Solaris, BeOS, OS/2,
Hi,
I am using CAS feature through thrift cas api.
I am able to set the expected column with some value and use cas through
thrift api. But I am sure what I should set for expected column list to
achieve IF NOT EXIST condition for a column.
Can someone help me on this?
--
Regards,
Mahesh
I just would advise against it because it's going to be difficult to narrow
down what's causing problems. For instance, if you have Node A which is
performing GC, it will affect query times on Node B which is trying to
satisfy a quorum read. Node B might actually have very low load, and it
will
You might want to look at this JIRA i filed today
CASSANDRA-6696 https://issues.apache.org/jira/browse/CASSANDRA-6696
You are good if you are fine with data reappearing.
On Wed, Feb 12, 2014 at 9:20 AM, Francisco Nogueira Calmon Sobral
fsob...@igcorp.com.br wrote:
Hi, Rahul.
I've removed
Hi Guys,
My question is probably best described by example. Is it possible to indicate
that on a particular day, the total number of “events” were zero.
// Three events today
update mytable count=count+1 where day=“20140101”
update mytable count=count+1 where day=“20140101”
update mytable
Hi Jacob,
I get the same effect using:
update mytable set count = count + 0 where day = 20140103
The count field is changed from null to zero as a result.
Steve
On Wed, Feb 12, 2014 at 6:31 PM, Jacob Rhoden jacob.rho...@me.com wrote:
Hi Guys,
My question is probably best described by
Frank did you ever file a ticket for this issue or find the root cause? I
believe we are seeing the same issues when attempting to bootstrap.
Thanks
From: Robert Coli rc...@eventbrite.commailto:rc...@eventbrite.com
Reply-To: user@cassandra.apache.orgmailto:user@cassandra.apache.org
Hi,
Can you please tell me how to transfer data from Oracle database into
Cassandra. We have like 50*10=500 tables (normalized) and would like to
transfer data from them to Cassandra to perform READ operations. Basically
intent is that if we can reduce load from Oracle database and keep only
select * from table will not populate row cache, but if the row is
cached, it will be used. You need to use select * from table where X=Y to
populate row cache.
when setting caching = rows_only you disable key cache which might hurt
your performance.
On Wed, Feb 12, 2014 at 9:05 PM, PARASHAR,
In that case are there any plans of supporting microsecond version of dateOf()
and now() functions. It's pretty common to use microsecond precision timeuuids.
I created this JIRA:
https://issues.apache.org/jira/browse/CASSANDRA-6672
cheers,
Drew
On Feb 11, 2014, at 1:11 AM, Sylvain Lebresne
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