But in Cassandra output log :
r...@cassandra-2:~# tail -f /var/log/cassandra/output.log
INFO 15:32:05,390 GC for ConcurrentMarkSweep: 1359 ms, 4295787600 reclaimed
leaving 1684169392 used; max is 6563430400
INFO 15:32:09,875 GC for ConcurrentMarkSweep: 1363 ms, 4296991416 reclaimed
It's in a FAQ somewhere.
Based on this:
http://en.wikipedia.org/wiki/Cassandra
An oracle might also be called a prophet.
On Thu, Jul 8, 2010 at 9:43 PM, ChingShen chingshenc...@gmail.com wrote:
Hi,
Why is cassandra named cassandra?
Thanks.
Shen
it is explained in the video on the site ;)
Op 9/07/10 03:43, ChingShen schreef:
Hi,
Why is cassandra named cassandra?
Thanks.
Shen
Hi,
I am a bit confused about getting an UnavailableException when doing a QUORUM
write.
I have a 3 node cluster, with RF=3. When all 3 nodes are up, the QUORUM write
succeeds. When 1 of the 3 nodes are down, the QUORUM write fails with
UnavailableException. Shouldn't it be enough with 2
row size is 10 KB and write count on a node for a CF is 1054451,
so ideally the total disk space used on that node by that CF should be
around 10 GB
but it's showing 23 GB
what else might be taking up so much space?
Thanks
Which client library do you use?
Shen
On Fri, Jul 9, 2010 at 4:53 PM, Per Olesen p...@trifork.com wrote:
Hi,
I am a bit confused about getting an UnavailableException when doing a
QUORUM write.
I have a 3 node cluster, with RF=3. When all 3 nodes are up, the QUORUM
write succeeds. When 1
On Jul 9, 2010, at 11:11 AM, ChingShen wrote:
Which client library do you use?
Direct on thrift api using thrift.jar, in version 917130.
Hi,
I am attempting to add a new node to a single node already running.
I have set the first node not to bootstrap, and the second node to
bootstrap whit the first node as it's seeder. The IP configuration is
OK, the machines can ping each other, the seed machine (or should I say
cassandra
Solved it!
Sorry to spam your inbox!
BoriS
On Fri, 2010-07-09 at 11:50 +0200, Boris Spasojevic wrote:
Hi,
I am attempting to add a new node to a single node already running.
I have set the first node not to bootstrap, and the second node to
bootstrap whit the first node as it's seeder.
what does WriteCount signify actually, it should also include writes which
are replicas right? It is total no of writes on that node for that CFtill
now, right ?
On Fri, Jul 9, 2010 at 2:39 PM, Sagar Agrawal sna...@gmail.com wrote:
row size is 10 KB and write count on a node for a CF is
Sounds like maybe your not binding the 7000 port to the correct interface,
maybe you have it set to localhost, rather then the IP address. If you want to
confirm, try prompt telnet [machine ip] 7000
If you get a connection refused, then the above is true.
Hope this helps.
Dimitry Lvovsky
Hi,
I was reading http://wiki.apache.org/cassandra/FAQ#iter_world and decided to
implement the get_range_slices method for listing all keys of a CF. Only thing
is, it doesn't work that well for me :-)
I do as it says (I think), and take KeyRanges of size N and use the key of the
last call as
I have a 2 node cluster
node1 - InitialToken5/InitialToken
node2 - InitialToken9/InitialToken
If I insert a row with key=a, which node should it go and why?
It is going to node1, but I think it should go to node2, since token value
of node is closer to a (using java string compareTo method)
see the beginning of http://wiki.apache.org/cassandra/Operations
On Fri, Jul 9, 2010 at 7:16 AM, Sagar Agrawal sna...@gmail.com wrote:
I have a 2 node cluster
node1 - InitialToken5/InitialToken
node2 - InitialToken9/InitialToken
If I insert a row with key=a, which node should it go and why?
Are you using OrderPreservingPartitioner or RandomPartitioner?
Cause if you are using RandomPartitioner, a hash is calculated from a and
that hash is used to determine where the data for a key goes, not a.
On Jul 9, 2010, at 2:16 PM, Sagar Agrawal wrote:
I have a 2 node cluster
node1 -
http://twitter.com/nk/status/17903187277
Another not using joke?
My previous reply seemed to have bounced.
Will there be a training day before/after the Cassandr Summit? (in SF on the
10th)
On Fri, Jul 2, 2010 at 2:08 PM, Jonathan Ellis jbel...@gmail.com wrote:
Riptano's one day Cassandra training is coming to NYC in August, our
first public session on the
got it, thanks
On Fri, Jul 9, 2010 at 6:21 PM, Per Olesen p...@trifork.com wrote:
Are you using OrderPreservingPartitioner or RandomPartitioner?
Cause if you are using RandomPartitioner, a hash is calculated from a and
that hash is used to determine where the data for a key goes, not a.
On Fri, Jul 2, 2010 at 1:08 PM, Jonathan Ellis jbel...@gmail.com wrote:
Riptano's one day Cassandra training is coming to NYC in August, our
first public session on the East coast:
http://www.eventbrite.com/event/749518831
Is there a calendar where you're listing this stuff, or is it just
Hi guys,
I am on the hook to explain why 30GB of data is filling up 106GB of disk space
since this is concerning information for my project.
We are very excited about the possibility of using Cassandra but need to
understand this anomaly in order to feel confident. Does anyone know why this
Today is your last chance to submit a CFP abstract for the 2010 Surge
Scalability Conference. The event is taking place on Sept 30 and Oct 1,
2010 in Baltimore, MD. Surge focuses on case studies that address
production failures and the re-engineering efforts that led to victory
in Web
Cassandra has a very high constant per-row overhead at the moment of around 40
bytes. Additionally, there is around 12 bytes of overhead per column. Finally,
column names are repeated for each row.
CASSANDRA-674 and CASSANDRA-1207 will help with these overheads, but they will
not be fixed
FYI: https://issues.apache.org/jira/browse/CASSANDRA-1145
Yes, it's a bug. CL.ONE is a reasonable work around.
On Thu, Jul 8, 2010 at 11:04 PM, Mike Malone m...@simplegeo.com wrote:
I think the answer to your question is no, you shouldn't.
I'm feeling far too lazy to do even light research on
then obsolete sstables is not your culprit.
On Thu, Jul 8, 2010 at 8:32 AM, Julie julie.su...@nextcentury.com wrote:
Jonathan Ellis jbellis at gmail.com writes:
SSTables that are obsoleted by a compaction are deleted
asynchronously when the JVM performs a GC. You can force a GC from
jconsole
there's some support for this in 0.7 (see
http://issues.apache.org/jira/browse/CASSANDRA-1018) but fundamentally
it's not really designed to be started and stopped multiple times
within the same process.
On Thu, Jul 8, 2010 at 3:44 AM, Andriy Kopachevsky
kopachev...@gmail.com wrote:
Hi, we are
typically you will update both as part of a batch_mutate, and if it
fails, retry the operation. re-writing any part that succeeded will
be harmless.
On Thu, Jul 8, 2010 at 11:13 AM, Stuart Langridge
stuart.langri...@canonical.com wrote:
Hi, Cassandra people!
We're looking at Cassandra as a
Short answer: yes.
Longer answer: http://wiki.apache.org/cassandra/Operations
On Fri, Jul 9, 2010 at 1:19 PM, Claire Chang cla...@merchantcircle.com wrote:
my keys are sequential integers and i use random partitioner in a multi-node
cluster. In this case, do I still have to specify
Thanks for your quick reply.. JoeI forgot to mentioned that we are
using PropertyFileEndPointSnitch to provide cassandra about our network
topology and below is property file uses by that class
cat
The workaround I do is fork always. Each test pulls up its own jvm.
On Jul 9, 2010 9:51 PM, Jonathan Ellis jbel...@gmail.com wrote:
there's some support for this in 0.7 (see
http://issues.apache.org/jira/browse/CASSANDRA-1018) but fundamentally
it's not really designed to be started and stopped
ConsistencyLevel.ONE is default option given inside stress.py so I am using
default one
--- On Fri, 7/9/10, Bill de hÓra b...@dehora.net wrote:
From: Bill de hÓra b...@dehora.net
Subject: Re: RackAwareStrategy vs RackUnAwareStrategy on AWS EC2 cloud
To: user@cassandra.apache.org
Date: Friday,
On Jul 9, 2010, at 1:16 PM, maneela a wrote:
Is there any way to mark cassandra node to keep it as just for replication
purpose and not to be as Primary for any data range in the ring?
I believe there is. This is what we're doing, but we do all of our writes via a
queue. Derek or Mike from
A good read.
http://techcrunch.com/2010/07/09/twitter-analytics-mysql/
Todd
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