Sorry, my bad. I misread as 1.2.4 for some reason!
You should be able to do it with the 2-way upgrade then. Don't forget that
once you upgrade to 2.0.x you need to perform a nodetool upgradesstables
and this is where, in my point of view, things can get tricky. First make
sure you have the space
Hello José,
There isn't yet an officially supported way to perform schema migrations
afaik, but there are quite a few tools on github that perform migrations
either from within the application, or external tools. We currently use
this tool to perform migrations embedded in the application:
This might be of interest (you probably have already found it):
http://grokbase.com/t/cassandra/user/14bs9zvasf/cassandra-schema-migrator
On Thu, Jan 29, 2015 at 9:16 AM, José Guilherme Vanz
guilherme@gmail.com wrote:
Hi, Ricardo
Thank you for your quick reply. =]
I'll take a look in
As the error implies, you cannot insert into counters tables, you can only
update them as increments or decrements (updating a counter that doesn't
exist will create it with the initial delta as if it had started at zero).
I would recommend this documentation which describes how to update
Yeap, some of the tools I already found. Anyway, thank you for the link
=]
On Thu, Jan 29, 2015 at 9:29 AM, Paulo Ricardo Motta Gomes
paulo.mo...@chaordicsystems.com wrote:
This might be of interest (you probably have already found it):
That's not a particularly good setup for load testing, I would try hard not
to draw any conclusions from it. Most likely your biggest bottleneck is
I/O in your VM's, and any savings from using prepared statements dwarf in
comparison to the price of virtualization. Point 2's effects are also
Hi Paul,
There is a JIRA ticket about this issue:
https://issues.apache.org/jira/browse/CASSANDRA-8696
I have seen these errors too the last time I ran nodetool repair.
I would also be interested to know the answer to the questions you were
asking:
Are these errors problematic? Should I just
Hi Carlos,
We are running 1.2.14 which is higher than 1.2.9 so I have an assumption that
the network layer is compatible, or do you specifically mean that 2.10 is not
compatible with 1.2.x ?
Regards
Charles
From: Carlos Rolo r...@pythian.commailto:r...@pythian.com
Reply-To:
Hello,
Is there a metric that will show how many reads per second C* serves? Read
requests shows how many requests are issued to cassandra, but I want to know
how many the cluster can actualy serve .
Prepared statements can take advantage of token aware routing which IIRC
non-prepared statements cannot in the DS Java Driver, so as your cluster
grows you reduce the overhead of statement coordination (assuming you use
token aware routing). There should also be less data to transfer for
shipping
I am running a 6 node cluster using Apache Cassandra 2.1.2 with DataStax
OpsCenter 5.0.2 from the AWS EC2 AMI DataStax Auto-Clustering AMI
2.5.1-hvm (DataStax Community AMI). When I try to run a repair on the
rollups60 column family in the OpsCenter keyspace, I get errors about
failed snapshot
Thanks Eric. I didn't know the point about the token aware routing.
But with points 2 and 3 I didn't notice much improvement with prepared
statement. I have 2 cassandra nodes running in virtual boxes in the same
machine and test client running in the same machine.
Thanks
Ajay
Prepared
Once they have fully joined the cluster I would like to decommission a
single Cassandra 1.2.14 instance, and repeat.
Do not do this. Upgrade your nodes in place.
On Thu Jan 29 2015 at 6:17:26 AM Sibbald, Charles charles.sibb...@bskyb.com
wrote:
Hi All,
I am looking into the possibility
+1 to everything Eric said.
The penalty of not using token aware routing increases as you add nodes,
load, and network overhead. This is kind of like batch statements. People
use them in dev, with 1 node, and think they're great to help with
performance. But when you put them in production...
On Thu, Jan 29, 2015 at 6:15 AM, Sibbald, Charles charles.sibb...@bskyb.com
wrote:
I am looking into the possibility of upgrading from Cassandra 1.2.14 to
Cassandra 2.1 in the following manor.
https://engineering.eventbrite.com/what-version-of-cassandra-should-i-run/
I have a large
Hi,
I saw there are 2 more interesting parameters –
a. tombstone_threshold - A ratio of garbage-collectable tombstones to all
contained columns, which if exceeded by the SSTable triggers compaction (with
no other SSTables) for the purpose of purging the tombstones. Default value –
0.2
Select distinct keys from column family; hits a timeout exception.
pk1, pk2,…pkn are 800K in total.
From: Mohammed Guller [mailto:moham...@glassbeam.com]
Sent: Friday, January 23, 2015 3:24 PM
To: user@cassandra.apache.org
Subject: RE: Retrieving all row keys of a CF
No wonder, the client is
On Thu, Jan 29, 2015 at 5:04 PM, Jan cne...@yahoo.com wrote:
Thanks Robert, your example got me going in the right direction.
Right on, glad to hear it, that was my goal. :D
=Rob
HI Folks;
I am trying to use JMXterm, a command line based tool to script monitor C*
cluster. Would anyone on this forum know the exact syntax to connect to
Cassandra Domain using JMXterm ?Please give me an example.
I do 'not' intend to use OpsCenter or any other UI based tool.
thanksJan
Thanks Rob;
here is what I am looking for :
java -jar /home/user/jmxterm-1.0-alpha-4-uber.jar 10.30.41.52:7199 -O
org.apache.cassandra.internal:type=FlushWriter -A CurrentlyBlockedTask
It does Not work since there is something wrong with my syntax. However once
working, it would be scripted
Ravi –
It may help.
What version are you running? Do you know if minor compaction is getting
triggered at all? One way to check would be see how many sstables the data
directory has.
Mohammed
From: Ravi Agrawal [mailto:ragra...@clearpoolgroup.com]
Sent: Thursday, January 29, 2015 1:29 PM
To:
Mbean: org.apache.cassandra.request
Attribute: org.apache.cassandra.request:type=ReadStage
Hope this helpsJan/
On Thursday, January 29, 2015 9:13 AM, Batranut Bogdan
batra...@yahoo.com wrote:
Hello,
Is there a metric that will show how many reads per second C* serves? Read
Here is the answer :
Put the following into a shell script it would yield the results :
JMXTERM_CMD=get -b org.apache.cassandra.db:type=StorageService -s Loadecho
$JMXTERM_CMD | java -jar /home/xyz/jmxterm-1.0-alpha-4-uber.jar -l
10.32.22.45:7199 -v silent -n
Variables are : -b
Thanks Eric..
yes 18 lacs implies 1.8 million.
On Thu, Jan 29, 2015 at 9:01 PM, Eric Stevens migh...@gmail.com wrote:
As the error implies, you cannot insert into counters tables, you can only
update them as increments or decrements (updating a counter that doesn't
exist will create it with
Hi,
We have Cassandra 1.2.16. While adding a new node, during bootstrap has
encountered java.io.IOException: Corrupt (negative) value length
in ColumnSortedMap. After this error streaming has been stopped and the
node is still in joining mode.
Has anyone came across a similar kind of error.
On Thu, Jan 29, 2015 at 3:27 PM, Jan cne...@yahoo.com wrote:
I am trying to use JMXterm, a command line based tool to script monitor
C* cluster.
Would anyone on this forum know the exact syntax to connect to Cassandra
Domain using JMXterm ?
Here's an example from an old JIRA at my shop :
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