Does anyone have any advice for me about how to do live updates (i.e.
updates on clusters while they are in use)?
My situation is like this:
Some data comes from the back office - this data is imported to Cassandra
from Oracle.
Some data comes from users - this data is imported to Oracle from
Hi all,
I'm having some issues with read consistency level ONE. The Wiki (and other
sources) say the following:
Will return the record returned by the first node to respond. A consistency
check is always done in a background thread to fix any consistency issues when
ConsistencyLevel.ONE is
Hi all,
I'm having some issues with read consistency level ONE. The Wiki (and other
sources) say the following:
Will return the record returned by the first node to respond. A consistency
check is always done in a background thread to fix any consistency issues
when ConsistencyLevel.ONE
On Jun 29, 2010, at 1:03 PM, Sylvain Lebresne wrote:
Hi all,
I'm having some issues with read consistency level ONE. The Wiki (and other
sources) say the following:
Will return the record returned by the first node to respond. A consistency
check is always done in a background thread
On Tue, 2010-06-29 at 13:10 +0200, Christian van der Leeden wrote:
just trying to talk to cassandra-trunk (0.7) via avro on ruby.
Started the server with ./bin/cassandra -a -f. The connection
code is here: http://pastie.org/1023158
Cassandra uses the HTTP transport (for now anyway),
Thanks, this works now.
Christian
On Jun 29, 2010, at 5:26 PM, Eric Evans wrote:
On Tue, 2010-06-29 at 13:10 +0200, Christian van der Leeden wrote:
just trying to talk to cassandra-trunk (0.7) via avro on ruby.
Started the server with ./bin/cassandra -a -f. The connection
code is
Hey Guys,
I've been into designing an application which consists of more than 20
ColumnFamily's.
Each ColumnFamily has some columns referencing to keys in other
ColumnFamily's,
some keys in ColumnFamily are combination of keys/columns in other
ColumnFamily's.
I guess most of the people are
Hey Guys,
Currently in a project I'm involved in, I need to have some columns holding
incremented data.
The easy approach for implementing a counter with increments is right now as
I figured out is read - increment - insert however this approach is not
an atomic operation and can easily be
On Tue, Jun 29, 2010 at 9:42 AM, Utku Can Topçu u...@topcu.gen.tr wrote:
Hey Guys,
Currently in a project I'm involved in, I need to have some columns holding
incremented data.
The easy approach for implementing a counter with increments is right now as
I figured out is read - increment -
Hi all - first timer here.
I'm experimenting with Cassandra on Rackspace Cloud. Started with 4GB nodes
and saw read latency spikes while streaming was taking place, so I increased to
8GB to see if limited memory was the issue. Now I'm seeing very strange
behavior during any period that
This sounds like an excellent reason to build a Cassandra Eclipse plugin -
it doesn't look like anyone is doing this yet.
Kind regards,
Peter Sankauskas
Motally, Inc
Office: +1 (415) 932-6898
On Tue, Jun 29, 2010 at 8:59 AM, Utku Can Topçu u...@topcu.gen.tr wrote:
Hey Guys,
I've been into
Another month of feedback, bug reports, discussion, and patching has
yielded another stable release, 0.6.3, and it's The Best Evar. But don't
take my word for it, go checkout the list of changes[1] for yourself and
when satisfied, download yours[2].
As always, mailing listers are standing by to
Maybe you need to modify the security groups to allow the ports to be
accessible from one to the other?
-Anthony
On Mon, Jun 28, 2010 at 08:34:12PM -0700, maneela a wrote:
I have provided East node's public DNS/ip address at that both end points
( ListenAddress and ThriftAddress) and West
On Jun 29, 2010, at 12:44 PM, Anthony Molinaro wrote:
Maybe you need to modify the security groups to allow the ports to be
accessible from one to the other?
A likely better solution would be to look into the VPNCubed product which was
built specifically for this purpose. We're in the middle
Until then, a pragmatic solution, however undesirable, would be to
only have a single logical thread/task/actor that is allowed to
read,modify,update. If this doesn't work for your application, then a
(distributed) lock manager may be used until such time that you can
take it out. Some are using
I just pulled down Cassandra 0.6.3. I saw this same issue in 0.6.2. Why is
there a difference between apache-cassandra-0.6.3-bin.jar and
apache-cassandra-0.6.3-src.jar when it comes to the Avro classes? The 'bin'
file has 16 top level classes; while the 'src' file only has 4. Even the
The (16-4) classes are generated in the ant build script. (In the binary
distribution these are already generated for you).
// Roger Schildmeijer
On 29 jun 2010, at 21.41em, Peter Minearo wrote:
I just pulled down Cassandra 0.6.3. I saw this same issue in 0.6.2. Why is
there a difference
Thanks Joe, I was hoping to hear from you. Can you pass me the SA contact at
AWS we would love to look in to it.
Lenin
--Original Message--
From: Joe Stump
To: user@cassandra.apache.org
ReplyTo: user@cassandra.apache.org
Subject: Re: Cassandra on AWS across Regions
Sent: Jun 29, 2010
Is there any way to get a description on these generated classes. I see
they are similar to the Thrift set of classes; but there seems to be
some differences; especially with the Cassandra class.
-Original Message-
From: Roger Schildmeijer [mailto:schildmei...@gmail.com]
Sent:
On Jun 29, 2010, at 2:56 PM, Lenin Gali wrote:
Thanks Joe, I was hoping to hear from you. Can you pass me the SA contact at
AWS we would love to look in to it.
Just contact your account representative. They'll get you hooked up. They have
multiple SAs that help out account representatives.
Still, to Clint's point, everyone knows how to make an HTTP request. If you
want a cassandra client running on, let's say, an iPhone for some reason, a
REST API is going to be a lot more straight forward to implement.
There's no reason an HTTP service would have to live inside the Cassandra
Kay, I've been upgrading node this morning on our servers and so far so
good. Although in the startup I noticed the following message:
INFO 10:22:49,413 Saved partitioner not found. Using
org.apache.cassandra.dht.OrderPreservingPartitioner
The storage-conf.xml file is configured to use
Nothing to worry about, we just save the partitioner now so we can detect if
it's changed in the config file after data has been loaded (which would
break stuff).
On Tue, Jun 29, 2010 at 7:25 PM, Anthony Ikeda
anthony.ik...@cardlink.com.au wrote:
Kay, I’ve been upgrading node this morning on
Avro in 0.6 is not even close to being usable, nor is it meant to be.
Use Thrift.
On Tue, Jun 29, 2010 at 4:33 PM, Peter Minearo
peter.mine...@reardencommerce.com wrote:
Is there any way to get a description on these generated classes. I see
they are similar to the Thrift set of classes; but
On Mon, Jun 28, 2010 at 10:11 PM, albert_e dongz...@gmail.com wrote:
Hi, all
We have several nodes in DC1 and DC2 and we want to move all nodes in DC2 to
a new DC3, also IPs will be changed. The whole progress will last about 1-2
days.
Can we simply stop all nodes in DC2, move to DC3, chage
You could be seeing GC pauses. Did you increase the heap size you gave
Cassandra, when you increased your VM size?
On Tue, Jun 29, 2010 at 11:57 AM, Oren Benjamin o...@clearspring.com wrote:
Hi all - first timer here.
I'm experimenting with Cassandra on Rackspace Cloud. Started with 4GB nodes
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