On Wed, Aug 10, 2011 at 5:24 PM, aaron morton wrote:
> I remember seeing this once before upgrading a system from 0.6 to 0.7 on a
> Ubuntu EC2 (non data stax build) with EBS disks. I did the same thing and
> just assumed it was an EBS or 0.6 bug. From memory after the upgrade that
> node had some
Yes, i can reproduce this behavior
If issue a query like this (on 0.7.8 with patch for CASSANDRA-2964 applied)
[default@demo]get users where birth_date = 1968 and state = 'UT';
with an index on birth_date but no index on state
I do not get results (actually I get '0 rows') even though there are ro
Hi Eldad / All,
On Wed, Aug 10, 2011 at 8:32 AM, Eldad Yamin wrote:
> Can you please explain how did you upgraded. something like step-by-step.
> Thanks!
I took the liberty of replying to the group as it would be interesting
to hear how other folks out there are doing it...
I'm *not* running a
You can apply this query really simply using cassandra and secondary
indexes.
You will have a CF "TABLE", where row keys are your PK. Just to be sure
of my understanding, your SQL query will either return 1 row or no row,
right ?
3) SliceQuery returns a range of columns for a given key, it m
On Thu, Aug 11, 2011 at 12:07 AM, aaron morton wrote:
> There's not much to do other than turn off the caches (which you have done)
> and leave it alone.
>
> If you want to poke around perhaps look at the compaction settings (from
> CLI help):
>
> - max_compaction_threshold: The maximum number of
(Note: This is a repost from another thread which did not have a
relevant subject, sorry for the spamming)
Hi Eldad / All,
On Wed, Aug 10, 2011 at 8:32 AM, Eldad Yamin wrote:
> Can you please explain how did you upgraded. something like step-by-step.
> Thanks!
I took the liberty of replying to
Please continue discussion in new thread "Best practices when
deploying & upgrading a cassandra cluster".
-Martin
On Thu, Aug 11, 2011 at 12:43 PM, Martin Lansler
wrote:
> Hi Eldad / All,
>
> On Wed, Aug 10, 2011 at 8:32 AM, Eldad Yamin wrote:
>> Can you please explain how did you upgraded. som
Yup, work perfectly now.
Thanks,
V.
On 10. Aug (Wednesday) v 20:45:36 -0500 2011, Brandon Williams wrote:
> You probably have other nodes that are NOT using the snitch yet, so
> they haven't populated DC/RACK info yet. The exceptions will stop
> when all snitches have been changed.
>
> On Wed,
Hi,
I have recently been migrating to a small 12 node Cassandra cluster
spanning across 4 DC's and have been encountering various issues with
what I suspect to be a performance tuning issue with my data set. I've
learnt a few lessons along the way but I'm at a bit of a roadblock now
where I
Hi,
Has anybody run Cassandra on Java SE 7? Any issues/caveats?
I'm on a mac so I have to wait a while :-(
-Martin
Hey folks,
I was wondering if anyone has a cassandra cluster running on a server setup
using blades, with a SAN appliance as the data file storage medium.
I would expect that there would be performance let-downs if the SAN was
connected with anything other than a fiber channel, but are there ot
The SAN model defeats some of the point of using Cassandra, but a
"hybrid" of commitlog-local would be better than "everything on san."
http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/Cassandra-on-iSCSI-td5945217.html
is a good thread for background.
On Thu, Aug 11, 2011 at 8:56
No shared seeds. Downright freaky.
seriously, If you change the cluster name in cassandra.yaml they won't
join.
On Thu, Aug 11, 2011 at 12:31 PM, Ashley Martens wrote:
> No shared seeds. Downright freaky.
>
>
--
http://twitter.com/tjake
The Cassandra team is pleased to announce the release of Apache Cassandra
version 0.8.4.
Cassandra is a highly scalable second-generation distributed database,
bringing together Dynamo's fully distributed design and Bigtable's
ColumnFamily-based data model. You can read more here:
http://cassand
On Thu, Aug 11, 2011 at 11:32 AM, Martin Lansler
wrote:
> Hi,
>
> Has anybody run Cassandra on Java SE 7? Any issues/caveats?
>
> I'm on a mac so I have to wait a while :-(
>
> -Martin
>
Now mind you I am running Cassandra 0.7, Tomcat 7.0, and Hive 0.7, so I love
anything once it hits version 7
53 seconds included the map phase to read and process the input file. The
records were updated at the end of the reduce phase.
I checked the sales ranks in the update file and the sales ranks in the
Cassandra, they are different and thus, the records
were not actually updated.
I remember I run th
On Thu, Aug 11, 2011 at 6:14 AM, Edward Capriolo wrote:
>
> In many regards Cassandra automatically does the correct thing. Other then
> the costs of the bloom filters for the table size being in ram, if you never
> read or write to those sstables and you are not reusing the row key, the OS
> will
No. He's saying that one of the points of mmaping the data files is
that the OS is free to only keep files that are actually used, in the
page cache. Since this data is backed by an actual file swap is not
involved.
On Thu, Aug 11, 2011 at 12:59 PM, Jason Baker wrote:
> On Thu, Aug 11, 2011 at
I did a test upgrade first and ran the scrub as part of that process to make
sure everything was working.
Cheers
-
Aaron Morton
Freelance Cassandra Developer
@aaronmorton
http://www.thelastpickle.com
On 11 Aug 2011, at 21:47, Zhu Han wrote:
>
>
> On Wed, Aug 10, 2011 at 5:24
>> 1) Is it possible to design to get equivalent results for above
>> query ( using CQL or Hector) with Cassandra.
If this is a common query in your app it's god idea to design the data model to
support the request. Seems safe to assume the PK in your example is non
unique, I'll call it the FKID
Would you be so kind as to announce the rpm release as well?
On Thu, Aug 11, 2011 at 10:52 AM, Sylvain Lebresne wrote:
> The Cassandra team is pleased to announce the release of Apache Cassandra
> version 0.8.4.
>
> Cassandra is a highly scalable second-generation distributed database,
> bringing
In a non dev system it's a lot easier to use the packages
http://wiki.apache.org/cassandra/DebianPackaging
http://www.datastax.com/docs/0.8/install/packaged_releases
Cheers
-
Aaron Morton
Freelance Cassandra Developer
@aaronmorton
http://www.thelastpickle.com
On 12 Aug 2011, at
Hello, is there any consensus on how to secure client/cluster
communications???
I'm running an 8 node cluster across EC2 regions. I'm running inter-node
encryption and I want to encrypt the traffic from the clients as well.
My options seem to be:
Have the client connect to only one node and enc
I don't think so, perhaps more succinctly, why would ROW actions only be
performed on a single node?
Ian
On Wed, Aug 10, 2011 at 8:12 PM, Jonathan Ellis wrote:
> are you i/o bound? I believe counter ROW needs to perform a read of
> the old value.
>
> On Wed, Aug 10, 2011 at 7:17 PM, Ian Danfor
https://issues.apache.org/jira/browse/CASSANDRA-2889
On Thu, Aug 11, 2011 at 2:55 PM, Ian Danforth wrote:
> I don't think so, perhaps more succinctly, why would ROW actions only be
> performed on a single node?
> Ian
>
> On Wed, Aug 10, 2011 at 8:12 PM, Jonathan Ellis wrote:
>>
>> are you i/o bo
Is there a reason you are using the trunk and not one of the tagged releases?
Official releases are a lot more stable than the trunk.
> 1) thrift timeouts & general degraded response times
For read or writes ? What sort of queries are you running ? Check the local
latency on each node using cfs
Turn the logging up in cassandra or your MR job and make sure the
batch_mutation is sent. Sounds like it's not.
Cheers
-
Aaron Morton
Freelance Cassandra Developer
@aaronmorton
http://www.thelastpickle.com
On 12 Aug 2011, at 07:22, Jian Fang wrote:
> 53 seconds included the ma
I'm writing at QUORUM though and (pardon me for being dense) it would seem
that the first replica shouldn't always be on the same server if I'm using
RP.
I very much appreciate your time, I'm sure there is something basic that
just hasn't clicked.
Ian
On Thu, Aug 11, 2011 at 2:56 PM, Jonathan El
I am trying to sstableloader and I do not want to access Cassandra on the same
node. I haved edited my Cassandra.yaml to with appropriate values for the
listen_address and rpc_address but I keep getting the error below. The
Cassandra-cli tool, nodetool etc. works find when trying to connect to m
RPMs for 0.8.4 are available via http://rpm.datastax.com/
Note - the Apache Cassandra team has nothing to do with the above
RPMs. We (DataStax) maintain this repository independently and try to
deploy them as close to the official releases as possible.
On Thu, Aug 11, 2011 at 4:14 PM, Ian Danfort
Is there a reason you are using the trunk and not one of the tagged
releases? Official releases are a lot more stable than the trunk.
Yes, as we are using a combination of Ec2 and colo servers we are
needing to use broadcast_address from CASSANDRA-2491. The patch that is
associated with tha
"Unable to bind to address nadevsan04/10.168.121.57:7000" means
something else is using that address/port. netstat can tell you what
process that is, if you're not sure.
On Thu, Aug 11, 2011 at 4:24 PM, Tom Davidson wrote:
> I am trying to sstableloader and I do not want to access Cassandra on t
Thanks Aaron,
This is the same as I've thought. But I'm wondering if there's come triggers
that can hash the column name in order to save disk space. Or do you think it's
better to have this feature?
Best,
Steve
On Aug 6, 2011, at 7:06 PM, aaron morton wrote:
> AFAIK it just makes it easier
I figured it out... I didn't realize the nuances of the sstableloader. Correct
me if I am wrong, but the sstableloader instance needs to communicate with a
Cassandra cluster via Gossip. In order to do that it sets up a mini gossip
server bound to a local port. I was thinking the Cassandra.yaml l
I've not checked the code but from memory when the nodes are ordered in
proximity to the coordinator the local node is always first if it's in the
replica set. So with RF=3 and N=3 the closest node is always the local one.
Cheers
-
Aaron Morton
Freelance Cassandra Developer
@a
>
> iostat doesn't show a request queue bottleneck. The timeouts we are seeing
> is for reads. The latency on the nodes I have temporarily used for reads is
> around 2-45ms. The next token in the ring at an alternate DC is showing ~4ms
> with everything else around 0.05ms. tpstats desn't sh
https://issues.apache.org/jira/browse/THRIFT-106 seems to be the right way
to go but the cassandra server needs to support too which we might want
to add
Regards,
On Thu, Aug 11, 2011 at 2:54 PM, Chris Marino wrote:
> Hello, is there any consensus on how to secure client/cluster
> co
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