Hi Eldad,
Check out http://wiki.apache.org/cassandra/CloudConfig
There are a few ways listed there including a step-by-step guide.
Dave Viner
On Wed, Aug 3, 2011 at 7:49 AM, Eldad Yamin wrote:
> Thanks!
> But I prefer to learn how to Install first - if you have any good
> refe
Just wanted to give a shout-out to Jonathan Ellis & the Riptano team for the
awesome training they provided yesterday in Santa Monica. It was awesome,
and I'd highly recommend it for anyone who is using or seriously considering
using Cassandra.
Just. freakin awesome.
Dave Viner
S1 and DC1-S2 are
still responding, your read query will succeed.
Of course, you are on the knife-edge. If you lost any machine in DC1 while
DC2 is out, then you would not be able to satisfy QUORUM reads or writes.
Note that in 0.7, the new LOCAL_QUORUM on reads would solve the issue, I
believe.
How does mx4j compare with the earlier jmx-to-rest bridge listed in the
operations page:
"JMX-to-REST bridge available at
http://code.google.com/p/polarrose-jmx-rest-bridge";
Thanks
Dave Viner
On Sun, Dec 19, 2010 at 7:01 AM, Ran Tavory wrote:
> FYI, I just added an mx4j s
dra jmx-to-rest runs in a separate jvm.
> > It also has a nice useful HTML interface that you can look into any
> > running host.
> >
> > On Sunday, December 19, 2010, Dave Viner wrote:
> >> How does mx4j compare with the earlier jmx-to-rest bridge listed in the
>
You can put a Cassandra cluster behind a load balancer. One thing to be
cautious of is the health check. Just because the node is listening on port
9160 doesn't mean that it's healthy to serve requests. It is required, but
not sufficient.
The real test is the JMX values.
Dave Vine
I think you can probably find all the information on the cassandra wiki at
http://wiki.apache.org/cassandra/ for free.
Dave Viner
On Wed, Dec 29, 2010 at 8:51 PM, asil klin wrote:
> Can't I get it for free from anywhere? I am a student researching on
> Cassandra datastore
Since it's all pay-for-use, you could build your system on both, then do
whatever stress testing you want.
The cassandra part of your app should be unchanged between different cloud
providers.
Personally, I'm using EC2 and don't have any complaints.
Dave Viner
On Mon, Jan 3,
1/2010
from the US"?
- "tell me how many page views occurred between 12/01/2010 and 12/31/2010
from the US in the 9th hour of the day (in gmt)"?
Time slicing and dimension slicing seems like it might be very challenging
(especially since the windows of time would not be known in advance).
Thanks
Dave Viner
n the query you will be
> doing. Don't get too hung up on traditional data structures and queries as
> they have little relationship to a Cassandra approach.
>
>
>
> On Wed, Jan 5, 2011 at 2:34 PM, Dave Viner wrote:
>
>> Does anyone use Cassandra to power an analytics
Is the idea to install 0.7 alongside the 0.6 instance or to replace
the entire machine/node with a new node running 0.7? If so, is there
a step 1b, which is "install 0.7 code & executables" ?
Thanks
Dave Viner
Perl using the thrift interface directly.
On Sat, Jan 15, 2011 at 6:10 AM, Daniel Lundin wrote:
> python + pycassa
> scala + Hector
>
> On Fri, Jan 14, 2011 at 6:24 PM, Ertio Lew wrote:
> > Hey,
> >
> > If you have a site in production environment or considering so, what
> > is the client that
can you give an example of the data and how you'd access it?
what would your expected columns (and/or supercolumns) be?
Dave Viner
On Mon, Jan 17, 2011 at 11:05 AM, Steven Mac wrote:
> How can I best map an object containing two maps, one of which is updated
> very frequently an
You can also use the apt-get repository version, which installs the startup
script. On http://wiki.apache.org/cassandra/CloudConfig, see the Cassandra
Basic Setup section. It applies to any debian based machine, not just cloud
instances.
HTH
Dave Viner
On Thu, Jan 20, 2011 at 9:11 AM, Donal
" would be
fantastic.
Dave Viner
On Fri, Jan 21, 2011 at 1:01 PM, Aaron Morton wrote:
> 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, eith
Just a quick shout-out to the riptano folks and becoming part of/forming
DataStax!
Congrats!
ity-groups";
Assuming that both nodes are in the same security group, ensure that the SG
is configured to allow other members of the SG to communicate on port 7000
to each other.
HTH,
Dave Viner
On Tue, Feb 22, 2011 at 8:59 PM, Himanshi Sharma wrote:
>
> Hi,
>
> I am ne
Try using the IP address, not the dns name in the cassandra.yaml.
If you can telnet from one to the other on port 7000, and both nodes have
the other node in their config, it should work.
Dave Viner
On Wed, Feb 23, 2011 at 1:43 AM, Himanshi Sharma wrote:
>
> Ya they do. Have specified
the other
node, which IP address did you use - the 10.x address or the public ip
address?
And what is the seed/non-seed configuration in both cassandra.yaml files?
Dave Viner
On Wed, Feb 23, 2011 at 8:12 AM, Frank LoVecchio wrote:
> The internal Amazon IP address is what you will want to use
window, user x must be interested in buying a car).
I don't have specifics as yet... just some general thoughts. But this feels
like a Cassandra type problem. (User profile can have lots of columns per
user, but the exact columns might differ from user to user... very scalable,
etc)
Thanks
Dave Viner
hat is routable from the
other node. I would first try with the actual public IP address (not the
Elastic IP). Once you get that to work, then shutdown the cluster, change
the listen_address to the EIP, boot up and try again.
Dave Viner
On Wed, Feb 23, 2011 at 8:54 PM, Himanshi Sharma wrote:
>
ddress
> field, Cassandra gives the same exception but if leave it blank then
> Cassandra runs but again in the nodetool command with ring option it does'nt
> show the node in another region.
>
> Thanks,
> Himanshi
>
>
> -Dave Viner wrote: -----
>
> To: user
piece-meal approach would be beneficial here.
Dave Viner
On Thu, Feb 24, 2011 at 6:11 AM, Daniel van Ham Colchete <
daniel.colch...@gmail.com> wrote:
> Himanshi,
>
> my bad, try this for iptables:
>
> # SNAT outgoing connections
> iptables -t nat -A POSTROUTIN
e
timelines for each user to build a "Profile"?
Are you on 0.7 or 0.6.x?
Dave Viner
On Tue, Mar 1, 2011 at 1:31 AM, Dave Gardner wrote:
> Dave
>
> Tyler's answer already covers CFs etc..
>
> We are using Cassandra to store user profile data for exactly the sort o
similarly with EBS. In EBS
you pay for the disk size you allocate. There's a tiny additional charge
for IO (currently $0.10 per 1M io requests).
HTH,
Dave Viner
On Wed, Mar 9, 2011 at 8:48 AM, Sasha Dolgy wrote:
> Hi Will,
>
> http://wiki.apache.org/cassandra/Operations#B
ode that's in a separate
region.
Taking it step-by-step will ensure that any issues are specific to the
region-to-region communication, rather than intra-zone connectivity or
cassandra cluster configuration.
Dave Viner
On Fri, Mar 18, 2011 at 8:34 AM, A J wrote:
> Hello,
>
>
>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.
Hi Milind,
Great work here. Can you provide the patch against the 2 files?
Perhaps there's some way to incorporate it into the trunk of cassandra so
that this is feasible (in a future release) without patching the source
code.
Dave Viner
On Mon, Mar 21, 2011 at 9:41 AM, A J wrote:
>
I saw this once when my servers ran out of file descriptors. This caused
totally weird problems.
Make sure all nodes in the cluster are listening on the gossip port (7000 by
default).
Also check out
http://www.datastax.com/docs/0.7/troubleshooting/index#view-of-ring-differs-between-some-nodesor
overloaded.
In practice, I've found it better for the client to have a pool of
connections, and then retry as needed to distinct nodes rather than use a
load balancer.
HTH
Dave Viner
On Tue, Apr 5, 2011 at 9:51 AM, A J wrote:
> Can someone comment on this ? Or is the question t
RAC1.
I've not yet proven to myself that this is accurate, but it definitely stops
the error messages and , from looking at the code, seems like it should
work.
Is this correct?
Thanks
Dave Viner
On Wed, Jul 7, 2010 at 6:22 PM, Eric Evans wrote:
>
> Let's move this to the user@
ing those files?
(That is, bring up a new node, copy the backed up files from the
crashed node onto the new node, then have the new node join the
cluster?)
Thanks
Dave Viner
y_cf_config
http://www.mail-archive.com/user@cassandra.apache.org/msg02498.html
HTH
Dave Viner
On Wed, Jul 7, 2010 at 11:39 PM, Peter Schuller wrote:
> > If I want to add a new Keyspace, does it mean I have to distribute my
> > storage-conf.xml to whole nodes? and restart whole
same region allows for higher thruput numbers.
Dave Viner
On Fri, Jul 9, 2010 at 10:36 AM, maneela a wrote:
> Are there any known performance issues if cassandra cluster launched with
> RackAwareStrategy because I see huge performance difference between
> RackAwareStrategy vs RackUnAwareS
I haven't used ELB, but I've setup HAProxy to do it... appears to work well
so far.
Dave Viner
On Tue, Jul 13, 2010 at 3:30 PM, Brian Helfrich wrote:
> Hi, has anyone been able to load balance a Cassandra cluster with an AWS
> Elastic Load Balancer? I've setup an ELB with
ge of your choosing. According to
http://wiki.apache.org/thrift/, "Thrift has generators for C++, C#, Erlang,
Haskell, Java, Objective C/Cocoa, OCaml, Perl, PHP, Python, Ruby, and
Squeak"
HTH
Dave Viner
On Tue, Jul 13, 2010 at 6:05 PM, GH wrote:
>
> To be honest I do not know how t
s at any time from any node.
"Also sorting happens on insert time"
Yes, I believe this is true.
Dave Viner
On Thu, Jul 15, 2010 at 4:26 PM, Karoly Negyesi wrote:
> Hi,
>
> I am writing a scalability chapter in a book and I need to mention
> Apache Cassandra although it&
Added: http://wiki.apache.org/cassandra/StorageConfiguration
On Mon, Jul 19, 2010 at 2:55 AM, Dimitry Lvovsky wrote:
> I think it would be a good idea to add a bit more explanation
> storage-conf.xml/wiki regarding the replication factor. It caused some
> confusion until we dug around the mail
Cloud, but perhaps they have something
similar?
This feels like the kind of problem that might be easier for someone else to
setup and quickly test. (The beauty of the virtual server - quick setup and
quick tear down)
Dave Viner
On Mon, Jul 19, 2010 at 10:24 AM, Peter Schuller <
peter.schul...
release of Cassandra...
Dave Viner
On Mon, Jul 19, 2010 at 2:35 PM, Peter Schuller wrote:
> > CPU was approximately equal across the cluster; it was around 50%.
> >
> > stress.py generates keys randomly or using a gaussian distribution, both
> methods showed the same resul
Zs in the same region, you can use internal IPs
in the storage-conf.xml file. If you use multiple regions, you must use
external IPs (and open the security groups accordingly).
Dave Viner
On Wed, Jul 21, 2010 at 2:33 PM, Aaron Morton wrote:
> This page may help
> http://wiki.apache.or
. Pure EC2 api calls to
setup your cluster.
You can also use rackaware-ness in EC2. Just add in the PropertyFile
endpoint and put your rack file in /etc/cassandra/rack.properties.
Dave Viner
On Thu, Jul 22, 2010 at 10:08 AM, Allan Carroll wrote:
> Hi all,
>
> I'm setting up a new clu
Yes... if you're using debian cassandra you can do:
/etc/init.d/cassandra stop
On Mon, Jul 26, 2010 at 8:05 AM, Lee Parker wrote:
> Which debian/ubuntu packages are you using? I am using the ones that are
> maintained by Eric Evans and the init.d script stops the server correctly.
>
> Lee Par
and aggregates from that directly in a hadoop post-processing...
But perhaps others will have better ideas. If you haven't read
http://arin.me/blog/wtf-is-a-supercolumn-cassandra-data-model, go read it
now. It won't answer your question directly, but will describe the process
of modeling a bl
AFAIK, atomic increments are not available. There recently has been quite a
bit of discussion about them. So, you might search the archives.
Dave Viner
On Mon, Jul 26, 2010 at 7:02 PM, Mark wrote:
> On 7/26/10 6:06 PM, Dave Viner wrote:
>
> I'd love to hear other's o
I've seen & used several...
names of children of employees of the company
names of streets near office
names of diseases (lead to very hard to spell names after a while, but was
quite educational for most developers)
names of characters from famous books (e.g., lord of the rings, asimov
novels, et
t check out the new async Thrift client in Java for inspiration:
http://blog.rapleaf.com/dev/2010/06/23/fully-async-thrift-client-in-java/
Or, even better, port the Thrift async client to work for python and other
languages.
Dave Viner
On Tue, Jul 27, 2010 at 8:44 AM, Peter Schuller wrote:
forming the iteration over the
keys. Any suggestions on how I can properly iterate?
Thanks
Dave Viner
, adding the keys to a hash table. When an
iteration returns no new keys, assume that all keys have been seen and exit.
-> this also fails, since a particular result set can be full of duplicates,
but the iteration has not traversed the entire row-key spectrum.
Dave Viner
On Wed, Jul 28, 2010 at 3:4
Is your code posted somewhere such that others could try it?
On Thu, Jul 29, 2010 at 5:57 AM, Miriam Allalouf
wrote:
> Hi,
> Please, can someone help us with Munin??
> Thanks,
> Miriam
>
>
> On Mon, Jul 26, 2010 at 1:58 PM, osishkin osishkin
> wrote:
> > Hi,
> >
> > I'm trying to use Munin to m
}
}
}
$have_more = 1;
} # end results loop
if ($keyrange->{'start_key'} eq $previous_start_key)
{
$have_more = 0;
}
} # end while() loop
$t
I am a user of the perl api - so I'd like to lurk in case there are things
that can benefit both perl & php.
Dave Viner
On Wed, Aug 18, 2010 at 1:35 PM, Gabriel Sosa wrote:
> I would like to help with this too!
>
>
> On Wed, Aug 18, 2010 at 5:15 PM, Bas Kok wrote:
>
&
e now in gen-perl/Cassandra*
You can copy those to your perl directory of choice.
Once you have the libraries installed, you should be able to run the sample
code from http://wiki.apache.org/cassandra/ThriftExamples#Perl to connect.
HTH,
Dave Viner
On Sat, Aug 28, 2010 at 8:22 AM, Eric Evans
t to drop those nodes from the rotation. I'd be happy to help with
this, as I know how it works with haproxy and standard web servers or other
tcp servers. But, I'm not sure how to make it work with Cassandra, since,
as Ben points out, it can return valid tcp responses (that say
"error-
yond the simple "machine not
reachable" issue and covers more common scenarios that temporarily impact
service time, but aren't so drastic as to cause machine outage.
Dave Viner
On Mon, Aug 30, 2010 at 9:52 AM, Edward Capriolo wrote:
> On Mon, Aug 30, 2010 at 12:40 PM, Dave Vi
l and column family stats -
https://support.cloudkick.com/Cassandra_Checks.
Dave Viner
On Fri, Sep 10, 2010 at 8:31 PM, Edward Capriolo wrote:
> On Fri, Sep 10, 2010 at 7:29 PM, aaron morton
> wrote:
> > Am going through the rather painful process of trying to monitor
> cassandra using
Hi Francois,
Any reason http://wiki.apache.org/cassandra/DebianPackaging isn't working
for you?
Dave Viner
On Thu, Sep 16, 2010 at 10:30 AM, Francois Richard wrote:
> Guys,
>
>
>
> I am trying to build a debian package in order to deploy Cassandra 0.6.5 on
> Ubuntu.
ng to put words in your mouth - but I want to make sure that I
understand what you're asking about (because I have similar ec2-related
thoughts). Let me know if this is an accurate summary.
Dave Viner
On Fri, Sep 17, 2010 at 7:41 AM, Jedd Rashbrooke <
jedd.rashbro...@imagini.net> wr
ou do not pay inbound-outbound fees for the data
xfer.
HTH,
Dave Viner
On Thu, Oct 7, 2010 at 10:26 AM, B. Todd Burruss wrote:
> if you are updating columns quite rapidly, you will scatter the columns
> over many sstables as you update them over time. this means that a read of
> a s
Has anyone found solid step-by-step docs on how to raid0 the ephemeral disks
in ec2 for use by Cassandra?
On Fri, Oct 8, 2010 at 12:11 PM, Jason Horman wrote:
> We are currently using EBS with 4 volumes striped with LVM. Wow, we
> didn't realize you could raid the ephemeral disks. I thought the
extremely nice) guy and I'm sure he could make HBase bend to his will
at any point.
Dave Viner
On Sun, Nov 21, 2010 at 4:16 PM, Todd Lipcon wrote:
> On Sun, Nov 21, 2010 at 2:06 PM, Edward Ribeiro
> wrote:
>
>>
>> Also I believe saying HBASE is consistent is not tru
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