Hello,
DS JD
On 03/27/2014 01:06 PM, DE VITO Dominique wrote:
Hi,
-Message d'origine-
De : ssiv...@gmail.com [mailto:ssiv...@gmail.com]
Envoyé : jeudi 27 mars 2014 10:41
À : user@cassandra.apache.org
Objet : Re: Which hector version is suitable for cassandra 2.0.6 ?
On 03/27/2014
cassandra*.noarch.rpm - Install Cassandra Only
dsc*.noarch.rpm - DSC stands for DataStax Community. Install Cassandra +
OpsCenter
Donald Smith donald.sm...@audiencescience.com a écrit sur 27/03/2014
20:36:57 :
De : Donald Smith donald.sm...@audiencescience.com
A : 'user@cassandra.apache.org'
On 3/28/2014 8:20 AM, Michael Shuler wrote:
# rpm -iv cassandra12-1.2.15-1.noarch.rpm
error: Failed dependencies:
java = 1.6.0 is needed by cassandra12-1.2.15-1.noarch
This properly indicates the missing dependency, which is not installed,
nor provided by a package in your 'rpm -i
On Fri, Mar 28, 2014 at 11:48 AM, Colin colpcl...@gmail.com wrote:
OpenJDK will crash under load whilst running Cassandra.
That's definitely the case for OpenJDK 6, but 7 *should* be okay. However,
most people are running the Oracle JRE (even for 7), so there's not a ton
of evidence out there
All,
I have a question about how to use the EmbeddedCassandraService in unit
tests. I wrote a short collection of unit tests here:
https://github.com/wibiclint/cassandra-java-driver-keyspaces
I'm trying to start up a new EmbeddedCassandraService for each unit test.
I looked at the Cassandra
In a previous message I described my guess at
what was causing the Datastax Cassandra installation
to require OpenJDK. Using the method I describe below,
I'm now able to install the Datastax Cassandra rpm.
Note that I have no idea (yet) whether Cassandra actually
runs, but at least it installs.
OpenJDK will crash under load whilst running Cassandra.
--
Colin
+1 320 221 9531
On Mar 28, 2014, at 4:11 PM, Jon Forrest jon.forr...@xoom.com wrote:
In a previous message I described my guess at
what was causing the Datastax Cassandra installation
to require OpenJDK. Using the
We are using cassandra 1.2.10 (With JNA installed) on ubuntu 12.04.3 and are
running our instances in Amazon Web Services.
What I am trying to do.
Our cassandra systems data is on an EBS volume so we can take snapshots of the
data and create volumes based on those snapshots and restore them
On Mar 27, 2014, at 2:16 PM, Michael Dykman mdyk...@gmail.com wrote:
Java on linux has *always* been a hassle. Recently, installing ant via
apt-get on an active ubuntu still want to yank in components of GCJ
shudder. Back to the tar-ball.
For Ubuntu and Debian, I use the webupd8team
On Fri, Mar 28, 2014 at 11:15 AM, Russ Lavoie ussray...@yahoo.com wrote:
We are using cassandra 1.2.10 (With JNA installed) on ubuntu 12.04.3 and
are running our instances in Amazon Web Services.
Our cassandra systems data is on an EBS volume
Best practice for Cassandra on AWS is to run
We are using version 1.2.4 and it is difficult to shutdown the embedded
version. But you don't have to. Just check in each test setup method if
embedded Cassandra is already running and start it if necessary. Than
create keyspaces/tables in setup methods and drop them in teardown methods.
For us
Thank you for your quick response.
Is there a way to tell when a snapshot is completely done?
On Friday, March 28, 2014 1:30 PM, Robert Coli rc...@eventbrite.com wrote:
On Fri, Mar 28, 2014 at 11:15 AM, Russ Lavoie ussray...@yahoo.com wrote:
We are using cassandra 1.2.10 (With JNA
In your step 4, be sure you create a consistent EBS snapshot. You may have
pieces of your sstables that have not actually been flushed all the way to
EBS.
See https://github.com/alestic/ec2-consistent-snapshot
ml
On Fri, Mar 28, 2014 at 3:21 PM, Russ Lavoie ussray...@yahoo.com wrote:
Thank
On Fri, Mar 28, 2014 at 12:21 PM, Russ Lavoie ussray...@yahoo.com wrote:
Thank you for your quick response.
Is there a way to tell when a snapshot is completely done?
IIRC, the JMX call blocks until the snapshot completes. It should be done
when nodetool returns.
=Rob
Robert,
That is what I thought as well. But apparently something is happening. The
only way I can get away with doing this is adding a sleep 60 right after the
nodetool snapshot is executed. I can reproduce this 100% of the time by not
issuing a sleep after nodetool snapshot.
This is the
Hi,
In my cassandra logs, I see a lot of StatusLogger output lines. I'm
trying to understand why this is logged, and how to interpret the output.
Maybe someone can point me to some documentation on this particular logging
aspect?
I would like to know what is triggering the StatusLogger.java to
I have a nagging memory of reading about issues with virtualization and not
actually having durable versions of your data even after an fsync (within
the VM). Googling around lead me to this post:
http://petercai.com/virtualization-is-bad-for-database-integrity/
It's possible you're hitting this
I will +1 the recommendation on using tablesnap over EBS. S3 is at least
predictable.
Additionally, from a practical standpoint, you may want to back up your
sstables somewhere. If you use S3, it's easy to pull just the new tables
out via aws-cli tools (s3 sync), to your remote, non-aws server,
As I tried to say, EBS snapshots require much care or you get corruption
such as you have encountered.
Does Cassandra quiesce the file system after a snapshot using fsfreeze or
xfs_freeze? Somehow I doubt it...
On Fri, Mar 28, 2014 at 4:17 PM, Jonathan Haddad j...@jonhaddad.com wrote:
I have
+1 for tablesnap
On Fri, Mar 28, 2014 at 4:28 PM, Jonathan Haddad j...@jonhaddad.com wrote:
I will +1 the recommendation on using tablesnap over EBS. S3 is at least
predictable.
Additionally, from a practical standpoint, you may want to back up your
sstables somewhere. If you use S3,
Another thing to keep in mind is that if you are hitting the issue I
described, waiting 60 seconds will not absolutely solve your problem, it
will only make it less likely to occur. If a memtable has been partially
flushed at the 60 second mark you will end up with the same corrupt sstable.
On
Hello All,
We've a schema which can be modeled as (studentID, subjectID, marks) where
combination of studentID and subjectID is unique. Number of studentID can
go up to 100 million and for each studentID we can have up to 10k
subjectIDs.
We are using apahce cassandra 2.0.4 and datastax java
Hi Apoorva,
I assume this is the table with studentId and subjectId as primary keys
and not other like like marks in that.
create table marks_table(studentId int, subjectId int, marks int, PRIMARY
KEY(studentId,subjectId));
Also could you give the cfhistogram stats?
nodetool cfhistograms your
I'm writing a Java client to a Cassandra db.
One of the main primary keys is a timeuuid.
I plan to do INSERTs using now() and have Cassandra generate the value of
the timeuuid.
After the INSERT, I need the Cassandra-generated timeuuid value. Is there
an easy wsay to get it, without having to
Hello Shrikar,
Yes primary key is (studentID, subjectID). I had dropped the test table,
recreating and populating it post which will share the cfhistogram. In such
case is there any practical limit on the rows I should fetch, for e.g.
should I do
select * form marks_table where studentID =
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