Of course with a SAN you'd want RF=1 since it's replicating
internally.
Isn't this the same case for raid-5 as well?
And we want RF=2 if we need to keep reading while doing rolling
restarts?
~mck
--
“Anyone who lives within their means suffers from a lack of
imagination.” - Oscar Wilde
|
[OT] They're quoting roughly the same price for both (claiming
that the
extra cost goes into having for each node a separate disk
cabinet to run
local raid-5).
You might not need raid-5 for local attached storage.
Yes we did ask. But raid-5 is the
Our experience of Cassandra+Hadoop is good.
We have a 16 node Cassandra cluster storing 110m users plus a 5 node
Hadoop cluster. We can scan through all rows in about 2.5 hours.
Dave
On Thursday, 20 January 2011, David G. Boney
dbon...@semanticartifacts.com wrote:
I don't think the below
No, what I'm thinking of is having two clusters (0.6 and 0.7) running on
different ports so they can't find each other. Or isn't that configurable?
Then, when I have the two clusters, I could upgrade all of the clients to
run against the new cluster, and finally upgrade the rest of the Cassandra
What about executing writes against both clusters during the changeover?
Interested in this topic because we're currently thinking about the same
thing - how to upgrade to 0.7 without any interruption.
Dave
On 21 January 2011 09:20, Daniel Josefsson jid...@gmail.com wrote:
No, what I'm
Hi All
I'm facing the same issue as this one mentioned here -
https://issues.apache.org/jira/browse/CASSANDRA-1594
Is there any solution or work-around for this?
Regards
Arijit
--
And when the night is cloudy,
There is still a light that shines on me,
Shine on until tomorrow, let it be.
Thanks Jonathan,
sorry for confusing terms. In any event -- does one have to whack the
obsoleted
data manually on all nodes??
Regards
Maxim
On 1/20/2011 10:51 PM, Jonathan Ellis wrote:
obsolete sstables are not the same thing as tombstones.
On Thu, Jan 20, 2011 at 8:11 PM,
I exec the code as below by hector client:
package com.riptano.cassandra.hector.example;
import me.prettyprint.cassandra.serializers.StringSerializer;
import me.prettyprint.hector.api.Cluster;
import me.prettyprint.hector.api.Keyspace;
import me.prettyprint.hector.api.beans.HColumn;
import
you are missing the column family in your keyspace.
If you are using the default definitions of schema shipped with cassandra,
ensure to load the schema from JMX.
thanks
ashish
2011/1/21 raoyixuan (Shandy) raoyix...@huawei.com
I exec the code as below by hector client:
*package*
Which schema is it?
From: Ashish [mailto:paliwalash...@gmail.com]
Sent: Friday, January 21, 2011 7:57 PM
To: user@cassandra.apache.org
Subject: Re: the java client problem
you are missing the column family in your keyspace.
If you are using the default definitions of schema shipped with
check cassandra-install-dir/conf/cassandra.yaml
start cassandra
connect via jconsole
find MBeans - org.apache.cassandra.db -
StorageServicehttp://wiki.apache.org/cassandra/StorageService
- Operations - loadSchemaFromYAML
load the schema
and then try the example again.
HTH
ashish
2011/1/21
Greetings --
if I use multiple secondary indexes in the query, what will Cassandra do?
Some examples say it will index on first EQ and then loop on others. Does it
ever do a proper index product to avoid inner loops?
Thanks
Maxim
--
View this message in context:
I've no idea why it doesn't work well.
We are testing Elasticity of Cassandra 0.6.6.We choose
orderPreservingPartitioner and set replicationFactor as 2.
We start from 6-server cluster(node A, B,C,D,E,F), which is load balanced.
roughly every node has 12GB. we then add node G between A and B.
Hi all,
I get the following error when I have cassandra running on 2 nodes (I don't
get it when I start only one node).
The startup on both nodes seems to be fine (e.g no error messages).
Then I set up a keyspace and insert some data on one node, that also works.
I start to insert data on both
On Jan 21, 2011, at 13:55, buddhasystem wrote:
if I use multiple secondary indexes in the query, what will Cassandra do?
Some examples say it will index on first EQ and then loop on others. Does it
ever do a proper index product to avoid inner loops?
Just asked the same question on the
But Timo, this is even more mysterious! If both conditions are met, at least
something must be returned in the second query. Have you tried this in CLI?
That would allow you to at least alleviate client concerns.
On 1/21/2011 10:38 AM, Timo Nentwig wrote:
On Jan 21, 2011, at 13:55, buddhasystem
On Jan 21, 2011, at 16:46, Maxim Potekhin wrote:
But Timo, this is even more mysterious! If both conditions are met, at least
something must be returned in the second query. Have you tried this in CLI?
That would allow you to at least alleviate client concerns.
I did this on the CLI only so
It is a little slow not to the point where it concerns me (only have few
tests for now), but keeps things very clean so no surprise effects.
On Thu, Jan 20, 2011 at 6:33 PM, Roshan Dawrani roshandawr...@gmail.comwrote:
On Fri, Jan 21, 2011 at 5:14 AM, Anand Somani meatfor...@gmail.comwrote:
Well it does sound like a bug in Cassandra. Indexes MUST commute.
I really need this functionality, it's a show stopper for me...
On 1/21/2011 10:56 AM, Timo Nentwig wrote:
On Jan 21, 2011, at 16:46, Maxim Potekhin wrote:
But Timo, this is even more mysterious! If both conditions are met, at
What versions of Cassandra and Hector? The versions mentioned on this
ticket are both several releases behind.
On Fri, Jan 21, 2011 at 3:53 AM, Arijit Mukherjee ariji...@gmail.com wrote:
Hi All
I'm facing the same issue as this one mentioned here -
We have similar exception before, and the root cause was like Aaron
mentioned.
You will encounter this exception If you have code create CF on the fly and
data was insert into the node which hasn't got schema synced yet.
You will have to call describe_schema_version() to ensure all nodes has
Hi All,
Shouldn't the existing method be changed to the following?
public boolean authorize(AuthenticatedUser user, ListObject resource,
Permission permission); // checks the authority for a given user for a
given resource for a given permission
The existing method:
public EnumSetPermission
On Fri, Jan 21, 2011 at 2:19 AM, Mick Semb Wever m...@apache.org wrote:
Of course with a SAN you'd want RF=1 since it's replicating
internally.
Isn't this the same case for raid-5 as well?
No, because the replication is (mainly) to protect you from machine
failures; if the SAN is a SPOF then
On Fri, 2011-01-21 at 22:45 +0600, indika kumara wrote:
Shouldn't the existing method be changed to the following?
public boolean authorize(AuthenticatedUser user, ListObject
resource,
Permission permission); // checks the authority for a given user for
a
given resource for a given
No, that's explained in the link Aaron gave.
On Fri, Jan 21, 2011 at 5:20 AM, Maxim Potekhin potek...@bnl.gov wrote:
Thanks Jonathan,
sorry for confusing terms. In any event -- does one have to whack the
obsoleted
data manually on all nodes??
Regards
Maxim
On 1/20/2011 10:51 PM,
What version?
On Fri, Jan 21, 2011 at 9:20 AM, Michael Haspra mhas...@gmail.com wrote:
Hi all,
I get the following error when I have cassandra running on 2 nodes (I don't
get it when I start only one node).
The startup on both nodes seems to be fine (e.g no error messages).
Then I set up a
Oh sorry:
The version is 0.7.0-beta3-SNAPSHOT
2011/1/21 Jonathan Ellis jbel...@gmail.com
What version?
On Fri, Jan 21, 2011 at 9:20 AM, Michael Haspra mhas...@gmail.com wrote:
Hi all,
I get the following error when I have cassandra running on 2 nodes (I
don't
get it when I start
Hi Kelvin,
Thanks for sharing! That's exactly what I was looking for.
Good luck with the migration.
Regards,
Rustam.
On 20/01/2011 17:40, Kelvin Kakugawa wrote:
Hi Rustam,
All of our large production clusters are still on 0.6.6.
However, we have an 0.7 branch, here:
I hear that a bunch of folks have GeoIndexing built on top of Cassandra and
running in production.
Any of them open sourced (Twitter? SimpleGeo? Bueller?) planning on it?
/*
Joe Stein
http://www.linkedin.com/in/charmalloc
Twitter: @allthingshadoop
*/
Not open source, but here's a preso on how simplegeo do it:
http://www.slideshare.net/mmalone/scaling-gis-data-in-nonrelational-data-stores
Note: we do it very differently here at Twitter (but aren't at liberty
to discuss in detail)– I say this just to point out that there are
several valid
One possible open source approach would be to use the Solr 1.4 spatial
plugin[1] along with Solandra[2]
What kind of spatial searches are you looking for? basic bounding
box/radius?
[1] https://github.com/outoftime/solr-spatial-light
[2] https://github.com/tjake/lucandra
On Fri, Jan 21, 2011
A more recent preso I gave about the SimpleGeo architecture is up at
http://strangeloop2010.com/system/talks/presentations/000/014/495/Malone-DimensionalDataDHT.pdf
Mike
On Fri, Jan 21, 2011 at 10:02 AM, Joseph Stein crypt...@gmail.com wrote:
I hear that a bunch of folks have GeoIndexing built
On Fri, Jan 21, 2011 at 12:07 PM, Jonathan Ellis jbel...@gmail.com wrote:
On Fri, Jan 21, 2011 at 2:19 AM, Mick Semb Wever m...@apache.org wrote:
Of course with a SAN you'd want RF=1 since it's replicating
internally.
Isn't this the same case for raid-5 as well?
No, because the replication
I don't see an assert in current 0.7 MessagingService that looks like
a candidate for that. So it's probably fixed.
Since apparently you're comfortable running snapshot builds, I'd
upgrade to the latest 0.7 branch. At least then you'd be running into
new bugs and not two month old ones.
On
Sort of - do not agree!!
This is the Shared nothing V/s Shared Disk debate. There are many mainstream
RDBMS products that pretend to do horizontal scalability with Shared Disks.
They have the kinds of problems that Cassandra is specifically architected
to avoid!
The original question here has 2
What's strange anyhow is that the GC period for these cfs expired some days
ago. I thought that a compaction would take care of these tombstones. I used
nodetool to compact.
I think the confusion here is that GC when mentioned in terms of
sstable removal refers to the JVM garbage collection.
Yup, you can use diff ports and you can give them different cluster names and
different seed lists.
After you upgrade the second cluster partition the data should repair across,
either via RR or the HHs that were stored while the first partition was down.
Easiest thing would be to run node
In general if you think the data is not distributed correctly run nodetool
repair on the node.
http://wiki.apache.org/cassandra/Operations#Repairing_missing_or_inconsistent_data
And before expecting the old node to throw away it's data, 'nodetool
cleanup' is required (but don't do this while
I agree. I am running a 0.6 cluster and would like to upgrade to 0.7. But,
I can not simply stop my existing nodes.
I need a way to load a new cluster - either on the same machines or new
machines - with the existing data.
I think my overall preference would be to upgrade the cluster to 0.7
It seams that this error was caused by an extension sending wrong messages
around, so that Message.getMessageType(). would return null since the verb
was not known to cassandra. Unfortunately I couldn't tell from the error.
But upgrading would be a good idea anyway...
2011/1/21 Jonathan Ellis
On Fri, Jan 21, 2011 at 1:49 PM, Mike Malone m...@simplegeo.com wrote:
A more recent preso I gave about the SimpleGeo architecture is up at
http://strangeloop2010.com/system/talks/presentations/000/014/495/Malone-DimensionalDataDHT.pdf
Mike
On Fri, Jan 21, 2011 at 10:02 AM, Joseph Stein
Dual writes would require you to have both a 0.6 and 0.7 client in the same
code base unless you have some sort of intermediate file or queue or something.
Since 0.6 and 0.7 use the same names in their thrift files this won't work,
thus my suggestion of adding a second service to the 0.6 and 0.7
On Fri, Jan 21, 2011 at 12:24 PM, Joseph Stein crypt...@gmail.com wrote:
Thanks Ryan, Jake and Mike for the quick responses.
I will mull through this weekend between engineering things from scratch or
going the Solr/Solandra route as Jake points out is an option (and the
effort/time related
the maven shade plugin might be able to help somewhat... if I get some spare
cycles I'll have a look at knocking up a thrift proxy that either makes 0.7
appear as 0.6 or vice versa
- Stephen
---
Sent from my Android phone, so random spelling mistakes, random nonsense
words and other nonsense are
On 1/18/11, Andy Burgess andy.burg...@rbsworldpay.com wrote:
Sorry for the delayed reply, but thanks very much - this pointed me at
the exact problem. I found that the queue size here was equal to the
number of configured DataFileDirectories, so a good test was to lie to
Cassandra and claim
A number of people have experienced lose from using multiple
DataFileDirectories, and to my knowledge no one has experienced win
from doing so.
I presume that's disk space reasons.
Do you have an actual use case for this functionality in which you
experience win?
I understood his use case
Thanks Eric for the clarification.
On Fri, Jan 21, 2011 at 11:11 PM, Eric Evans eev...@rackspace.com wrote:
On Fri, 2011-01-21 at 22:45 +0600, indika kumara wrote:
Shouldn't the existing method be changed to the following?
public boolean authorize(AuthenticatedUser user, ListObject
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