Hello,
I am newbie to the Cassandra world. I am currently using
Cassandra 2.0.0 with thrift 0.8.0 for storing netflow packets using
libQtCassandra library. Currently, I am generating about 1000 netflows/sec
and store\ing them into the database. The program is crashing with the an
exceptio
Hey guys,
False alarm, sorry about that. Our column-names are byte-concatenations of
short integers and we had been constructing the column names wrongly before
attempting a delete. We fixed the problem and we've been able to delete the
columns without issue.
On Fri, Nov 1, 2013 at 4:19 PM, Robe
On Fri, Nov 1, 2013 at 8:15 AM, Suruchi Deodhar <
suruchi.deod...@generalsentiment.com> wrote:
> I provide the timestamp as the current time and
> consistency_level=ConsistencyLevel.ALL.
>
> My questions wrt this are:
> 1. Is there a log where I can check whether the remove command registered
> su
On Fri, Nov 1, 2013 at 12:47 PM, Jiri Horky wrote:
> since we upgraded half of our Cassandra cluster to 2.0.0 and we use LCS,
> we hit CASSANDRA-6284 bug.
1) Why upgrade a cluster to 2.0.0? Hopefully not a production cluster? [1]
2) CASSANDRA-6284 is ouch, thx for filing and patching!
3) What
Hi all
since we upgraded half of our Cassandra cluster to 2.0.0 and we use LCS,
we hit CASSANDRA-6284 bug. So basically all data in sstables created
after the upgrade are wrongly (non-uniformly within compaction levels)
distributed. This causes a huge overhead when compacting new sstables
(see the
First I need to vent.
One of my cassandra cluster is a dual data center setup, with DC1
acting as primary, and DC2 acting as a hot backup.
Well, guess what ? I am pretty sure that it falls behind on
replication. So I am told I need to run repair.
I run repair (with -pr) on DC2. First time
On Fri, Nov 1, 2013 at 9:36 AM, Narendra Sharma
wrote:
> I was successfully able to bootstrap the node. The issue was RF > 2.
> Thanks again Robert.
>
For the record, I'm not entirely clear why bootstrapping two nodes into the
same range should have caused your specific bootstrap problem, but I a
We got issues with Hinted Handoff threads (2 actives) now which cause High CPU
Load and a lot of garbage collection only on our new nodes. You can see that we
have a lot of Hints on our new nodes (the 4 last ones)
node001
2.2M/cassandra/data/system/hints/
node002
1.6M/cassandra/data/syst
Tyler,
Thanks for the explanation. The objective is not to have a perfectly
balanced US-East and SG DC clusters. SG DC cluster is just a backup cluster
and hence has lesser nodes than US-East cluster. What we are trying to
figure out is the imbalance between the 6 nodes within US-East itself. I'll
In my case, both of my laptop are running Windows 7 64 bit.. Not sure
what's the problem...
On Fri, Nov 1, 2013 at 4:48 AM, Aaron Mintz wrote:
> One issue I ran into that produced similar symptoms: if you have
> internode_compression turned on without the proper snappy library available
> for y
I was successfully able to bootstrap the node. The issue was RF > 2. Thanks
again Robert.
On Wed, Oct 30, 2013 at 10:29 AM, Narendra Sharma wrote:
> Thanks Robert.
>
> I didn't realize that some of the keyspaces (not all and esp. the biggest
> one I was focusing on) had RF > 2. I wasted 3 days
On Fri, Nov 1, 2013 at 5:07 AM, Rakesh Rajan wrote:
>
> 1) By alternating racks, do you mean to alternate racks between all nodes
> in a single DC v/s multiple DCs? AWS EastCoast has 4 AZs
> and Singapore has 2 AZs. So is the final solution something like this:
> ip11 - East Coast - m1.xlarge / u
Hello folks,
I have a couple of questions regarding deletion of columns from Cassandra
using thrift.
I am trying to remove a column using the thrift API call - remove() defined
as below.
void remove(1:required binary key,
2:required ColumnPath column_path,
3:required i
Your quotes need to be escaped:
python -c "num=2; print \"\n\".join([(\"token %d: %d\"
%(i,(i*(2**127)/num))) for i in range(0,num)])"
--
Ray //o-o\\
On Fri, Nov 1, 2013 at 10:36 AM, Peter Sanford
wrote:
> I can't tell you why that one-liner isn't working, but you can try
> http://www.cassan
I can't tell you why that one-liner isn't working, but you can try
http://www.cassandraring.com for generating balanced tokens.
On Thu, Oct 31, 2013 at 11:59 PM, Techy Teck wrote:
> I am trying to setup two node Cassandra Cluster on windows machine. I have
> basically two windows machine and I w
I recommend using CassandraUnit (https://github.com/jsevellec/cassandra-unit).
It makes using Cassandra in unit tests quite easy.
It allows you to start an embedded Cassandra synchronously with a single
simple method call, optionally load your schema and initial data, and
you're ready to start tes
One issue I ran into that produced similar symptoms: if you have
internode_compression turned on without the proper snappy library available
for your architecture (i had 64-bit linux), starting up will fail to link
the nodes. It'll also be silent unless you set a certain class logging
level to DEBU
Forgot to mention: All 9 nodes on Cassandra 1.2.9. Also, tpstats on the
high CPU node indicate:
1. Pool NameActive Pending Completed
Blocked All time blocked
2. ReadStage32 6600 3420385815
0 0
3. RequestRe
@Tyler / @Rob,
As Ashish mentioned earlier, we have 9 nodes on AWS - 6 on EastCoast and 3
on Singapore. All 9 nodes uses EC2Snitch. The current ring ( across all
nodes in 2 DC ) looks like this:
ip11 - East Coast - m1.xlarge / us-east-1b - Size: 83 GB - Token: 0
ip21 - Singapore - m1.xla
Hi Evan,
The clients connect to all nodes. We tried shutting the thrift server on
the affected node. Loads did not come down.
On Fri, Nov 1, 2013 at 12:59 AM, Evan Weaver wrote:
> Are all your clients only connecting to your first node? I would
> probably strace it and compare the trace to on
Hi all,
I am a newbie to Cassandra and I am tring to write test cases to cassandra
with JUnit.
I use CassandraDaemon class to start cassandra in IntelliJ IDEA. I want to
wait
until Cassandra up and running before runnig test methods. How can I wait
until cassandra starts or
is there any way to che
I am trying to setup two nodes of Cassandra cluster on my windows machine.
Basically, I have two windows machine. In both of my machine, I have
installed Cassandra 1.2.11 from Datastax. Now I was following this
[tutorial](
http://www.datastax.com/2012/01/how-to-setup-and-monitor-a-multi-node-cassan
I am trying to setup two node Cassandra Cluster on windows machine. I have
basically two windows machine and I was following this datastax tutorial (
http://www.datastax.com/2012/01/how-to-setup-and-monitor-a-multi-node-cassandra-cluster-on-windows
)
Whenever I use the below command to get the tok
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