Thanks for the links. I wanted to avoid a major compaction somehow.
I see many JIRA issues on timestamps related to compaction/reads. So many
improvements have been proposed.
--
Ravi
On Thu, Oct 10, 2013 at 12:26 AM, Shahab Yunus shahab.yu...@gmail.comwrote:
Ahh, yes, 'compaction'. I blanked
You overwrite your columns by writing new row/supercolumn.
Remove new row/supercolumn from for statement, which is for columns:
int rowKey = 10;
int superColumnKey = 20;
usersWriter.newRow(ByteBufferUtil.bytes(rowKey));
usersWriter.newSuperColumn(ByteBufferUtil.bytes(superColumnKey));
for (int
Hi all,
I want to ask a basic question: To add a new node to Cassandra system, do I
need to restart the Cassandra system?
thanks
juwenguang
jn shangjie
Hi all,
I want to ask a basic question: To add a new node to Cassandra system, do I
need to restart the Cassandra system?
thanks
juwenguang
jn shangjie
Hi all,
I want to ask a basic question: To add a new node to Cassandra system, do I
need to restart the Cassandra system?
thanks
juwenguang
jn shangjie
Hello,
No you don't need to. Check this out:
http://www.datastax.com/documentation/cassandra/2.0/webhelp/index.html#cassandra/operations/ops_add_node_to_cluster_t.html
Cheers,
Hannu
2013/10/10 juwg j...@jnshangjie.com
**
Hi all,
I want to ask a basic question: To add a new node to
Hello,
thank you very much for your reply.
I want to ask another question:
for an already existed keyspace, can I change the number of replicas in it's
REPLICATION option?
If so, do I need to restart the whole cluster?
Thanaks in advance.
ju wenguang
From: Hannu Kröger
Date: 2013-10-10
Hi,
You don't need to restart for that either. Check this out:
http://www.datastax.com/docs/1.1/cluster_management#replication-factor
Cheers,
Hannu
2013/10/10 j...@jnshangjie.com
**
Hello,
thank you very much for your reply.
I want to ask another question:
for an already existed
hi,
thank you very much!
ju wenguang
From: Hannu Kröger
Date: 2013-10-10 17:01
To: user; juwg
Subject: Re: Re: Add a new node
Hi,
You don't need to restart for that either. Check this out:
http://www.datastax.com/docs/1.1/cluster_management#replication-factor
Cheers,
Hannu
2013/10/10
I was reading through configuration tips for cassandra and decided to
use row-cache in order to optimize the read performance on my cluster.
I have a cluster of 10 nodes, each of them opeartion with 3 GB off-heap
using cassandra 2.4.1. I am doing local quorum reads, which means that I
will
If you're hitting 3/5 nodes, it sounds like you've set your replication
factor to 5. Is that what you're doing so you can have a 2-node outtage?
For a 5-node cluster, RF=5, each node will have 100% of your data (a second
DC is just a clone), so with a 3GB off-heap it means that 3GB / total data
From: johnlu...@hotmail.com
To: user@cassandra.apache.org
Subject: RE: cassandra hadoop reducer writing to CQL3 - primary key - must it
be text type?
Date: Wed, 9 Oct 2013 18:33:13 -0400
reduce method :
public void reduce(LongWritable
Hi, I thought the bulk API could handle this, merging all columns
for the same super column. I did something like this in the java client
(Hector) where it is able to solve this conflict only appending the columns.
Regarding to the column value, if the code is overwriting the
Hi.
That is basically our set up. We'll be holding all data on all nodes.
My problem was more on how the cache would behave. I thought it might go
this way:
1. No cache hit
Read from 3 nodes to verify results are correct and then return. Write
result into RowCache.
2. Cache hit
Read
SSTableSimpleUnsortedWriter is a sstable writer, not Cassandra, so it just
writes to file what you give as it is, you need to ensure the consistency.
You can check the file before running sstableloader, all the data is within
sstable, but instead of 1 row it will have 10 rows with the same key.
We have suddenly started receiving RangeSliceCommand serializer errors.
We are running 1.2.4 version
This does not happen for Names based command. Only for Slice based
commands, we get this error.
Any help is greatly appreciated
ERROR [Thread-405] 2013-10-10 07:58:13,453 CassandraDaemon.java
Are you doing QUORUM reads instead of LOCAL_QUORUM reads?
On Wed, Oct 9, 2013 at 7:41 PM, Chris Burroughs
chris.burrou...@gmail.comwrote:
I have not been able to do the test with the 2nd cluster, but have been
given a disturbing data point. We had a disk slowly fail causing a
significant
Thanks, double checked; reads are CL.ONE.
On 10/10/2013 11:15 AM, J. Ryan Earl wrote:
Are you doing QUORUM reads instead of LOCAL_QUORUM reads?
On Wed, Oct 9, 2013 at 7:41 PM, Chris Burroughs
chris.burrou...@gmail.comwrote:
I have not been able to do the test with the 2nd cluster, but have
Reads still need to satisfy quorum when you've specified quorum --
otherwise you have no consistency control.
Each read goes out to each node that has a replica of key (in your case
all) and then independently each node consults its row cache and either
returns cached data or has to go through
We're currently running our pre-production system on a 4 node EC2 cluster
with C* 1.1.6.
We have the luxury of a fresh install..rebuilding all our data so we can
skip upgrades and just install a clean system. We obviously won't to do
this very often so we'd like to do it right...take advantage
I started C*2 in a test environment yesterday - you need jdk 7
On Fri, Oct 11, 2013 at 9:20 AM, Brian Tarbox tar...@cabotresearch.comwrote:
We're currently running our pre-production system on a 4 node EC2 cluster
with C* 1.1.6.
We have the luxury of a fresh install..rebuilding all our data
Am I posting this to the wrong place?
--
View this message in context:
http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/Proper-Use-of-PreparedStatements-in-DataStax-driver-tp7590793p7590845.html
Sent from the cassandra-u...@incubator.apache.org mailing list archive at
Have you done any migration? Can you correlate these errors with any
activity?
On Thu, Oct 10, 2013 at 8:00 AM, Ravikumar Govindarajan
ravikumar.govindara...@gmail.com wrote:
We have suddenly started receiving RangeSliceCommand serializer errors.
We are running 1.2.4 version
This does not
Hello Cassandra Users,
I've recently created a Cassandra Agent as part of Netflix's Cloud Prize
competition, the submission which I've named Hector is largely based on
Netflix's Priam. I would be very interested in getting feedback, from anyone
willing to give Hector
On Thursday, October 10, 2013 08:30:42 PM Blair Jacuzzi wrote:
On 10/10/2013 07:54 PM, Sean McCully wrote:
Hello Cassandra Users,
I've recently created a Cassandra Agent as part of Netflix's Cloud Prize
competition, the submission which I've named Hector is largely based on
Netflix's
On 10/10/2013 08:53 PM, Sean McCully wrote:
On Thursday, October 10, 2013 08:30:42 PM Blair Jacuzzi wrote:
On 10/10/2013 07:54 PM, Sean McCully wrote:
Hello Cassandra Users,
I've recently created a Cassandra Agent as part of Netflix's Cloud Prize
competition, the submission which I've named
On 10/10/2013 10:28 PM, Blair Zajac wrote:
On 10/10/2013 08:53 PM, Sean McCully wrote:
On Thursday, October 10, 2013 08:30:42 PM Blair Jacuzzi wrote:
On 10/10/2013 07:54 PM, Sean McCully wrote:
Hello Cassandra Users,
I've recently created a Cassandra Agent as part of Netflix's Cloud
Prize
Seems like the greeks are all used out, how about moving the the japanese
mythology? it's a brand new pool of names...
http://en.wikipedia.org/wiki/Japanese_mythology
On Fri, Oct 11, 2013 at 8:29 AM, Blair Zajac bl...@orcaware.com wrote:
On 10/10/2013 10:28 PM, Blair Zajac wrote:
On
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