Hi
I'm trying to predict when my cluster would soon be needing new nodes
added, i want a continuous graph telling my of my cluster health so
that when i see my cluster becomes more and more busy (I want numbers
measurments) i would be able to know i need to start purchasing more
machines and get
On Thu, May 12, 2011 at 1:58 AM, Anurag Gujral anurag.guj...@gmail.com wrote:
Hi All,
I am testing network topology strategy in cassandra I am using
two nodes , one node each in different data center.
Since the nodes are in different dc I assigned token 0 to both the nodes.
I
My use case is like this: I have a development cluster, a staging cluster
and a production cluster. When I finish a set of migrations (i.e. changes)
on the development cluster, I want to apply them to the staging cluster, and
eventually the production cluster. I don't want to do it by hand,
Just out of curiosity is this on the receiver or sender side?
I have been wondering a bit if the hint playback could need some
adjustment.
There is potentially quite big differences on how much is sent per throttle
delay time depending on what your data looks like.
Early 0.7 releases also built
An if you have 10 nodes, do all of them happen to send hints to the two with
GC?
Terje
On Thu, May 12, 2011 at 6:10 PM, Terje Marthinussen tmarthinus...@gmail.com
wrote:
Just out of curiosity is this on the receiver or sender side?
I have been wondering a bit if the hint playback could need
Hi All
I am experience some problem with me two Cassandra node with RF=2,Both
node CPU's usage is very high,load average: 9.47, 5.72, 5.11 and this
causing my application to time out .I have xeon with 8 processor and 16
GB of Ram.and LVM setup for Cassandra.How can i trace the main issue of
Hi guys,
I have strange problem with 0.8.0-rc1. I'm not quite sure if this is the way
it should be but:
- I create a ColumnFamily named Counters
- do a few increments on a column.
- kill cassandra
- start cassandra
When I look at the counter column, the value is 1.
See the following pastebin
Greetings,
Just out of curiosity is this on the receiver or sender side?
Looks like sender side, although the 2 nodes were replicating to each
other so it's hard to tell.
I have been wondering a bit if the hint playback could need some
adjustment.
There is potentially quite big
An if you have 10 nodes, do all of them happen to send hints to the two
with GC?
The 2 nodes are adjacent in token range. They are replicating to each other.
Other nodes have no data to replicate so there's no proof one way or
another.
Best,
Gabriel
see the ticket https://issues.apache.org/jira/browse/CASSANDRA-2642 please
On Thu, May 12, 2011 at 3:28 PM, Utku Can Topçu u...@topcu.gen.tr wrote:
Hi guys,
I have strange problem with 0.8.0-rc1. I'm not quite sure if this is the
way it should be but:
- I create a ColumnFamily named
Greetings,
Doesn't really look abnormal to me for a heavy write load situation
which is what receiving hints is.
I would agree with you but this raises some questions about write
performance. Plus I've only seen this kind of behavior recently and only
on 2 adjacent nodes. So I have good reason
I'm assuming the two nodes are the ones receiving the HH after they were
down.
Adjacent, so yes.
Are there a lot of hints collected while they are down ? you can check the
HintedHandOffManager MBean in JConsole
There wasn't any downtime - that's something else that's weird.
What
What does the TPStats look like on the nodes under pressure ? And how many
nodes are delivering hints to the nodes when they restart?
$nodetool -h 127.0.0.1 tpstats
Pool NameActive Pending Completed
ReadStage 1 11992475
On 05/12/2011 04:08 PM, Ali Ahsan wrote:
Hi All
I am experience some problem with me two Cassandra node with RF=2,Both
node CPU's usage is very high,load average: 9.47, 5.72, 5.11 and this
causing my application to time out .I have xeon with 8 processor and
16 GB of Ram.and LVM setup for
On Thu, May 12, 2011 at 6:04 PM, Ali Ahsan ali.ah...@panasiangroup.com wrote:
On 05/12/2011 04:08 PM, Ali Ahsan wrote:
Hi All
I am experience some problem with me two Cassandra node with RF=2,Both
node CPU's usage is very high,load average: 9.47, 5.72, 5.11 and this
causing my application
Hi all
got a question for folks with some code insight again.
To be able to better understand where our IO load is coming from we want to
monitor the number of bytes read from disc per cf. (we love stats)
What I have done is wrapping the FileDataInput in SSTableReader to sum the
bytes read in
https://svn.apache.org/repos/asf/cassandra/tags/cassandra-0.6.13/CHANGES.txt
On Thu, May 12, 2011 at 11:56 AM, Ali Ahsan ali.ah...@panasiangroup.com wrote:
It is indeed advised to use sunjdk as openjdk is a bit behind as far
as bug fixes are
concerned.
Moreover, 0.6.3 is pretty old now and
Thanks everyone for your responses.
On Thu, May 12, 2011 at 1:18 AM, Sylvain Lebresne sylv...@datastax.comwrote:
On Thu, May 12, 2011 at 1:58 AM, Anurag Gujral anurag.guj...@gmail.com
wrote:
Hi All,
I am testing network topology strategy in cassandra I am
using
two nodes ,
Hey guys,
I have a ec2 debian cluster consisting of several nodes running 0.7.5 on
ephimeral disks.
These are fresh installs and not upgrades.
The commitlog is set to the smaller of the disks which is around 10G in size
and the datadir is set to the bigger disk.
The config file is basically the
I understand that cassandra periodically cleans up the commitlog directories
by generating sstables in datadir. Is there any way to speed up this
movement from commitog to datadir?
commitlog_rotation_threshold_in_mb could cause problems if it was set
very very high, but with the default of
Hi All,
I have two questions:
a) Is there a way to turn on and off hinted handoff per keyspace rather
than for multiple keyspaces.
b)It looks like cassandra stores hinted handoff data in one row.Is it true?
.Does having one row for hinted handoff implies
if nodes are down for longer
Hi all,
My partner and I currently using cassandra cluster to run TPC-C. We first
use 2 ec2 nodes to load 20 warehouses. One(client node) has 8 cores, the
other(worker node) has 4 cores. During the loading time, either the client
node or the worker node will down(cannot be detected) randomly
I'm not sure about your first question.
I believe the internal system keyspace holds the hinted handoff information.
In 0.6 and earlier, HintedHandoffManager.sendMessage used to read the entire
row into memory and then send the row back to the client in a single
message. As of 0.7, Cassandra
I'd recommend trying the 0.7 svn branch (soon to be voted on as 0.7.6)
On Thu, May 12, 2011 at 3:09 PM, Xiaowei Wang xiaowei...@gmail.com wrote:
Hi all,
My partner and I currently using cassandra cluster to run TPC-C. We first
use 2 ec2 nodes to load 20 warehouses. One(client node) has 8
I'm using Cassandra 0.7.5, and uploading about 200 GB of data total (20 GB
unique data), to a cluster of 10 servers. I'm using batch_mutate, and breaking
the data up into chunks of about 10k records. Each record is about 5KB, so a
total of about 50MB per batch. When I upload a smaller 2 GB
The key JVM options for Cassandra are in cassandra.in.sh.
What is your min and max heap size?
The default setting of max heap size is 1GB. How much RAM do your nodes
have? You may want to increase this setting. You can also set the -Xmx and
-Xms options to the same value to keep Java from having
Can u share the code?
On Mon, May 2, 2011 at 11:34 PM, anuya joshi anu...@gmail.com wrote:
Hello,
I am using Cassandra for my application.My Cassandra client uses Thrift
APIs directly. The problem I am facing currently is as follows:
1) I added a row and columns in it dynamically via
It looks like MAX_HEAP_SIZE is set in cassandra-env.sh to be half of my
physical memory. These are 15GB VMs, so that's 7.5GB for Cassandra. I would
have expected that to work, but I will override to 13 GB just to see what
happens.
I've also got the JNA thing set up. Do you think this would
Oh, forgot this detail: I have no swap configured, so swapping is not the
cause of the crash. Could it be that I'm running out of memory on a 15GB
machine? That seems unlikely. I grepped dmesg for oom and didn't see
anything from the oom killer, and I used the instructions from the
If it's a jvm crash there should be a hs_err_pid.log file left around
in the directory you started Cassandra from.
On Thu, May 12, 2011 at 6:15 PM, James Cipar jci...@cmu.edu wrote:
I'm using Cassandra 0.7.5, and uploading about 200 GB of data total (20 GB
unique data), to a cluster of 10
If this a 64bit VM?
A 32bit Java VM with default c-heap settings can only actually use
about 2GB of Java Heap.
On Thu, May 12, 2011 at 8:08 PM, James Cipar jci...@cmu.edu wrote:
Oh, forgot this detail: I have no swap configured, so swapping is not the
cause of the crash. Could it be that
Thanks Jonathan, but can you provide some links about 0.7 svn branch?
2011/5/12 Jonathan Ellis jbel...@gmail.com
I'd recommend trying the 0.7 svn branch (soon to be voted on as 0.7.6)
On Thu, May 12, 2011 at 3:09 PM, Xiaowei Wang xiaowei...@gmail.com
wrote:
Hi all,
My partner and I
https://svn.apache.org/repos/asf/cassandra/branches/cassandra-0.7
On Thu, May 12, 2011 at 8:33 PM, Xiaowei Wang xiaowei...@gmail.com wrote:
Thanks Jonathan, but can you provide some links about 0.7 svn branch?
2011/5/12 Jonathan Ellis jbel...@gmail.com
I'd recommend trying the 0.7 svn branch
Oh sorry, we use cassandra-0.7.4 already. Is the version fine?
2011/5/12 Jonathan Ellis jbel...@gmail.com
https://svn.apache.org/repos/asf/cassandra/branches/cassandra-0.7
On Thu, May 12, 2011 at 8:33 PM, Xiaowei Wang xiaowei...@gmail.com
wrote:
Thanks Jonathan, but can you provide some
Hi All,
I run following command on one of my nodes to move the token
from 0 to 2.
/usr/cassandra/cassandra/bin/nodetool -h 10.170.195.204 -p 8080 move 2. I
dont understand why is this happening?
I am getting the following assertion error:
Exception in thread main
Not if you want the pausing/marking down fixes that were done more recently. :)
On Thu, May 12, 2011 at 8:39 PM, Xiaowei Wang xiaowei...@gmail.com wrote:
Oh sorry, we use cassandra-0.7.4 already. Is the version fine?
2011/5/12 Jonathan Ellis jbel...@gmail.com
Thanks!
2011/5/12 Jonathan Ellis jbel...@gmail.com
Not if you want the pausing/marking down fixes that were done more
recently. :)
On Thu, May 12, 2011 at 8:39 PM, Xiaowei Wang xiaowei...@gmail.com
wrote:
Oh sorry, we use cassandra-0.7.4 already. Is the version fine?
2011/5/12
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