Are you using thrift 0.5 as downloaded from there:
http://incubator.apache.org/thrift/download/ ?
On Thu, Mar 17, 2011 at 10:20 PM, Michael Fortin wrote:
> Thanks for the response, sorry if my initial question wasn't clear.
>
> When using thrift, I call
> client.get_slice(keyBytes, columnParent,
Hi !
I have run with Cassandra 0.7.2 out of disc space and after moving to bigger
partition I experience compaction failures[1].
1) I suspect one of SSTables is broken. If I am right how can I find which one
exactly ?
2) Knowing which one is broken is it safe to stop Cassandra, remove
-Data.db
hi all,
i am searching for a working example of cassandra using avro as rpc client,
still no luck... , pl share if any one have worked on it...
any help or pointers ???
regards
Sagar
Are you exploring a Big Data Strategy ? Listen to this recorded webinar on
P
Avro support for client rpc has been dropped (It was never official anyway), so
it is strongly discouraged to try using it.
--
Sylvain
2011/3/18 Sagar Kohli :
> hi all,
>
> i am searching for a working example of cassandra using avro as rpc client,
> still no luck... , pl share if any one have wo
Upgrade to 0.7.4 and run nodetool scrub (then watch the log). If it
reports bad rows then run repair post-scrub.
On Fri, Mar 18, 2011 at 6:44 AM, Mateusz Korniak
wrote:
> Hi !
> I have run with Cassandra 0.7.2 out of disc space and after moving to bigger
> partition I experience compaction failu
On Thu, 2011-02-24 at 19:45 -0500, Matt Kennedy wrote:
> Right, so I'm interpreting silence as a confirmation on all points. I
> opened:
> https://issues.apache.org/jira/browse/CASSANDRA-2245
> https://issues.apache.org/jira/browse/CASSANDRA-2246
I think https://issues.apache.org/jira/browse/CASSA
Hello,
I am trying to setup a cassandra cluster across regions.
For testing I am keeping it simple and just having one node in US-EAST
(say ec2-1-2-3-4.compute-1.amazonaws.com) and one node in US-WEST (say
ec2-2-2-3-4.us-west-1.compute.amazonaws.com).
Using Cassandra 0.7.4
The one in east region
Hi,
When I looking at "countPendingHints" in HintedHandoffManager via jmx,
I found that pending hints increases even when my cluster handles only
reads with quorum from clients.
The count decreases when I see it in long period (e.g., in an hour).
But it can increase in several thousands in short p
Hi all,
Anyone based in the UK may be interested in our user group meetup on
Monday. We will have talks on Hadoop integration and some performance data
related to this.
Please come along if you'd like to meet other people using Cassandra or
would like to learn more.
http://www.meetup.com/Cassan
Hi AJ,
I'd suggest getting to a multi-region cluster step-by-step. First, get 2
nodes running in the same availability zone. Make sure that works properly.
Second, add a node in a separate availability zone, but in the same region.
Make sure that's working properly. Third, add a node that's i
Thats exactly what I am doing.
I was able to do the first two scenarios without any issues (i.e. 2
nodes in same availability zone. Followed by an additional node in a
different zone but same region)
I am stuck at the third scenario of separate regions.
(I did read the "Cassandra nodes on EC2 in
>From the us-west instance, are you able to connect to the us-east instance
using telnet on port 7000 and 9160?
If not, then you need to open those ports for communication (via your
Security Group)
Dave Viner
On Fri, Mar 18, 2011 at 10:20 AM, A J wrote:
> Thats exactly what I am doing.
>
> I w
have you confirmed connectivity through the different security groups
and that you're not being blocked between region:port < -- > region:
port ?
On Fri, Mar 18, 2011 at 6:20 PM, A J wrote:
> Thats exactly what I am doing.
>
> I was able to do the first two scenarios without any issues (i.e. 2
>
I am able to telnet from one region to another on 7000 port without
issues. (I get the expected Connected to .Escape character is
'^]'.)
Also I am able to execute cassandra client on 9160 port from one
region to another without issues (this is when I run cassandra
separately on each region wit
Just to add, all the telnet (port 7000) and cassandra-cli (port 9160)
connections are done using the public DNS (that goes like
ec2-.compute.amazonaws.com)
On Fri, Mar 18, 2011 at 1:37 PM, A J wrote:
> I am able to telnet from one region to another on 7000 port without
> issues. (I get the ex
When in active/active data center how to decide right replication factor?
Client may connect and request for the information from either data center
so if locally it's RF=3 then in multiple data center should it be RF=6 in
active/active?
Or what happens if it's RF=3 with network toplogy and 2 copi
Hi everyone,
I was on the mailing list back in December/January, asking questions
about rebalancing some nodes, etc. We currently have a ring of 3
systems, redundancy set to 2, and all is well.
We'd like to snapshot our ring and build a new development/staging node
from it (the old dev node
That should work, but if you have the disk space it's a lot simpler to
just copy all the data files from each machine to a target out of the
cluster, then have the target run cleanup.
On Fri, Mar 18, 2011 at 1:07 PM, ian douglas wrote:
> Hi everyone,
>
> I was on the mailing list back in December
So can one just take all of the *.db files from all the machines in a cluster,
put them in a folder together (renaming ones with the same number?) and start
up a node which will then have access to all the data?
-Original Message-
From: Jonathan Ellis [mailto:jbel...@gmail.com]
Sent: We
This has been discussed once, but I don't remember the outcome. I insert a
row and then delete the key immediately. I then run nodetool compact. In
cassanra-cli, "list cf" still return 1 empty row. This is not a showstopper
but damn unpretty. Is there a way to make deleted rows go, immediately?
-
Right.
Only subtlety is the system keyspace; cleanest is to just start from
scratch there (which means rebuilding the schema) but you could also
start with a copy of an existing node's (just one) and start up with
-Dcassandra.load_ring_state=false.
On Fri, Mar 18, 2011 at 2:29 PM, Jeremiah Jordan
Hi,
Just thought I follow up and mention that I was able to fix it. I was calling
super_column.name in scala, which was accessing the name field in the
SuperColumn class, and not actually calling getName(). Thanks for the
feedback, it helped.
M!ke
On Mar 18, 2011, at 4:16 AM, Sylvain Lebresn
http://wiki.apache.org/cassandra/FAQ#range_ghosts
On Fri, Mar 18, 2011 at 3:12 PM, buddhasystem wrote:
> This has been discussed once, but I don't remember the outcome. I insert a
> row and then delete the key immediately. I then run nodetool compact. In
> cassanra-cli, "list cf" still return 1
On Friday 18 of March 2011, Jonathan Ellis wrote:
> Upgrade to 0.7.4 and run nodetool scrub (then watch the log).
Unfortunately nodetool scrub fails with:
WARN [CompactionExecutor:1] 2011-03-19 00:34:53,511 CompactionManager.java
(line 607) Non-fatal error reading row (stacktrace follows)
java.
Is there is noticeable difference in speed between reading the whole row
through Pycassa, vs a range of columns? Both rows and columns are pretty
slim.
--
View this message in context:
http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/Reading-whole-row-vs-a-range-of-columns-pycass
Dear experts, :)
Our application triggered an OOM error in Cassandra 0.6.5 by reading the
same 1.7MB column repeatedly (~80k reads). I analyzed the heap dump, and it
looks like the column value was queued 5400 times in an
OutboundTcpConnection destined for the Cassandra instance that received the
Hello Dave,
I am in Australia and was wondering if this group could do a phone hookup?
Ash
On 19/03/2011, at 2:25 AM, Dave Gardner wrote:
> Hi all,
>
> Anyone based in the UK may be interested in our user group meetup on Monday.
> We will have talks on Hadoop integration and some performanc
Hey everyone,
Is there a way to prevent cassandra from compacting while it is
running? I am having to do some scrub+sstable2json->json2sstable
magic, and I don't want the data changing at all while I am in the
process.
Thanks,
Jason
Got my answer from the #cassandra channel:
I can set max_compaction_threshold to 0 to prevent compaction from
occurring while I rebuild everything.
Thanks!
Jason Harvey
On Mar 18, 5:45 pm, Jason Harvey wrote:
> Hey everyone,
>
> Is there a way to prevent cassandra from compacting while it is
>
Hi everyone
I am still new to Cassandra, Thrift.
But anyway Cassandra 0.7.4, Thrift 0.5.0 are working on java 1.6.0.18 of
Debian 5.0.7.at single node.
Then I had to try and check multi node on 2 servers.
(JVM_PORT=10036 on /etc/cassandra-env.sh)
I modified /etc/cassandra/cassandra.yaml as followin
Hola everyone,
I have been considering making a few nodes only manage 1 token and
entirely dedicating them to talking to clients. My reasoning behind
this is I don't like the idea of a node having a dual-duty of handling
data, and talking to all of the client stuff.
Is there any merit to this tho
Are you saying you dont like the idea of the co-ordinator node being in the
same ring? if yes have you looked at the cassandra "fat client" in contrib?
Regards,
On Fri, Mar 18, 2011 at 6:55 PM, Jason Harvey wrote:
> Hola everyone,
>
> I have been considering making a few nodes only manage 1
As I'm working on this further, I want to understand this:
Is it advantageous to flatten data in blocks (strings) each containing a
series of objects, if I know that a serial object read is often likely, but
don't want to resort to OPP? I worked out the optimal granularity, it seems.
Is it better
You need to specify the -jmxport with nodetool
On Mar 19, 2011 2:48 AM, "ko...@vivinavi.com" wrote:
> Hi everyone
>
> I am still new to Cassandra, Thrift.
> But anyway Cassandra 0.7.4, Thrift 0.5.0 are working on java 1.6.0.18 of
> Debian 5.0.7.at single node.
> Then I had to try and check multi n
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