There are 3 different things we are talking here
1. SimpleStrategy vs. NetworkTopology matter when you have single DC vs.
Multiple DC's2. In both cases you can specific replication factor, obviously in
SimpleStratgey case you dont mention DC whereas in NetworkTopology, you can
mentione mutiple
Yes, absolutely. I thought he was looking for an install.sh type of script.
I did say a fresh server ;)
On Tue, Mar 17, 2015 at 1:52 AM, Jonathan Haddad j...@jonhaddad.com wrote:
Be careful w/ that script if you're looking to upgrade, it nukes your data
directory.
sudo rm -rf
Hi,
We are trying to Decouple our Reporting DB from OLTP. Need urgent help on the
feasibility of proposed solution for PRODUCTION.
Use Case: Currently, our OLTP and Reporting application and DB are same. Some
CF are used for both OLTP and Reporting while others are solely used for
If you are running a sequential repair (or have previously run a sequential
repair that is still running) Cassandra will still have the file
descriptors open for files in the snapshot it is using for the repair
operation.
From the http://www.datastax.com/dev/blog/repair-in-cassandra
*Cassandra
Hello,
Please, i have a cluster of 10 nodes, so i have to download the last
version of cassandra and install it on each node, that's it ?
Thanks a lot.
Best Regards.
2015-03-16 16:39 GMT+01:00 Jake Luciani j...@apache.org:
Apache Cassandra is a fully distributed database. It is the right
2.0.13 is the latest release in the 2.0 branch. There is also the 2.1
branch, which is currently at 2.1.3, and 2.1.4 is under development.
This is all listed on http://cassandra.apache.org/download/ and this
question may be best suited for the user mailing list :)
--
Michael
On 03/16/2015
Apache Cassandra is a fully distributed database. It is the right choice
when you need scalability and high availability without compromising
performance.
http://cassandra.apache.org/
Downloads of source and binary distributions are listed in our download
section:
Cassandra is used in a message process system.
The table will be created at a fixed time each day.
Make sure you're keeping the total number of tables which exist at any
given time to a reasonable limit. There is a fixed memory cost for each
table, and if you have too many tables you will
OK.
I have tens of nodes in my cluster. i'd like to get the states of these
nodes(alive, not etc ..). (it is just a first step to test cassandra)
So, i have downloaded the latest release.
*First terminal: *
../apache-cassandra-2.1.3/bin$ ./cassandra -f
.
INFO 17:16:54 Starting
You should probably make a new thread for this. This is an announcement
for a new Cassandra release.
On Mon, Mar 16, 2015 at 10:34 AM, jean paul researche...@gmail.com wrote:
OK.
I have tens of nodes in my cluster. i'd like to get the states of these
nodes(alive, not etc ..). (it is just a
I don't think its recommended to have two instances on the same node.
Have you considered using something like elasticsearch for the reports? Its
designed for that sort of thing.
On Mar 17, 2015 8:07 AM, Anuj Wadehra anujw_2...@yahoo.co.in wrote:
Hi,
We are trying to Decouple our Reporting
If I am following your thread correctly, I think you might be confusing the
creeation of a table with the recording of the definition + storage
for the table allocated.
When you define the table, based on your config, the existence of the table
is recorded in the master node(s). But tables are
I understand that 2 instances on one node looks a weird solution. But can have
dedicated reporting nodes for big customers but not for small customers.
My questions would be:1. What is the technical reasoning? What problems you
foresee if we use 2 C* instances on one node in production? We
We have a 16-node, globally-distributed cluster. running Cassandra
2.0.12. We're using the Datastax packages on CentOS 6.5.
Even though the total amount of data on each server is only a few
hundred MB (as measured by both du and the load metric), we're
seeing a problem where the disk usage is
On Mon, Mar 16, 2015 at 5:28 PM, Jan cne...@yahoo.com wrote:
David;
all the packaged installations use the /var/lib/cassandra directory.
Could you check your yaml config files and see if you are using this default
directory for backups
May want to change it to a location with more disk
Hi Jean,
I see you are getting a lot of help on other threads. Can you please elaborate
a bit more on the problem you are trying to solve. Would nodetool status help
(http://www.datastax.com/documentation/cassandra/2.0/cassandra/tools/toolsStatus.html
Be careful w/ that script if you're looking to upgrade, it nukes your data
directory.
sudo rm -rf /var/lib/cassandra/data/system/*
On Mon, Mar 16, 2015 at 1:41 PM, Ali Akhtar ali.rac...@gmail.com wrote:
https://gist.github.com/aliakhtar/3649e412787034156cbb
Best run from a fresh ubuntu
Cassandra will by default snapshot your data directory on the following
events:
- TRUNCATE and DROP schema events
- when you run nodetool repair
- when you run nodetool snapshot
Snapshots are just hardlinks to existing SSTables so the only disk space
they take up is for files that have
On Mon, Mar 16, 2015 at 6:12 PM, Ben Bromhead b...@instaclustr.com wrote:
Cassandra will by default snapshot your data directory on the following
events:
TRUNCATE and DROP schema events
when you run nodetool repair
when you run nodetool snapshot
Snapshots are just hardlinks to existing
https://gist.github.com/aliakhtar/3649e412787034156cbb
Best run from a fresh ubuntu server.
On Tue, Mar 17, 2015 at 12:50 AM, jean paul researche...@gmail.com wrote:
i find this solution:
I have used m3.medium and m3.large
On Sat, Mar 14, 2015 at 2:36 AM, Patrick McFadin pmcfa...@gmail.com wrote:
What size of instance are you using? It looks like you aren't at to get
resources set up in time.
On Thursday, March 12, 2015, Vanessa Gligor vanessagli...@gmail.com
wrote:
When
If you want to guarantee that the data is written to all nodes before the
code returns, then yes you have to use consistency all. Otherwise there
is a small risk of outdated data being served if a node goes offline longer
than hints timeouts.
Somewhat looser options that can assure multiple
Cassandra is used in a message process system.
The table will be created at a fixed time each day.
We want the table can be created before the message arrived.
So I want to guarantee table is created in all the nodes.
Peter
发件人: 鄢来琼
发送时间: 2015年3月16日 15:14
收件人: user@cassandra.apache.org
主题: Re:
Hi Daemeon,
Yes, I use “NetworkTopologyStrategy” strategy for “Table_test”,
but “System keyspace” is Cassandra internal keyspace, its strategy is
localStrategy.
So my question is how to guarantee “Table_test” is created in all the nodes
before any R/W opertions?
Thanks.
Peter
发件人: daemeon
Hi,
Are Cassandra Batch statements
http://www.datastax.com/documentation/cql/3.1/cql/cql_reference/batch_r.html
the
recommended way for updating same information in multiple tables?
For example if I have the following tables:
person_by_dob
person_by_ssn
person_by_lastname
Then
./nodetool help gossipinfo
NAME
nodetool gossipinfo - Shows the gossip information for the cluster
SYNOPSIS
nodetool [(-h host | --host host)] [(-p port | --port port)]
[(-pw password | --password password)]
[(-pwf passwordFilePath | --password-file
i restart the system and it displays:
INFO 17:16:54 Starting listening for CQL clients on
localhost/127.0.0.1:9042...
INFO 17:16:54 Binding thrift service to localhost/127.0.0.1:9160
INFO 17:16:54 Listening for thrift clients...
!!!
perharps i have to kill the process on the port 9160 when i
i can test './cqlsh' command but not with nodetool !
/Bureau/apache-cassandra-2.0.13/bin# ./cqlsh
Connected to Test Cluster at localhost:9160.
[cqlsh 4.1.1 | Cassandra 2.0.13 | CQL spec 3.1.1 | Thrift protocol 19.39.0]
Use HELP for help.
cqlsh
cqlsh
cqlsh exit
/Bureau/apache-cassandra-2.0.13/bin#
Hello :) Thanks a lot for you help :)
Please, i have another question about gossip and failure detection.
i'd like to test step by step all components in cassandra. i'd like to test
first of all gossip protocol
https://wiki.apache.org/cassandra/ArchitectureGossip and the failure
detection
I
On Mon, Mar 16, 2015 at 12:13 PM, Viswanathan Ramachandran
vish.ramachand...@gmail.com wrote:
Is BATCH the recommended way of updating all three tables at one go so
that the information between the three tables is consistent ?
As a general statement :
If you are looking to update multiple
Is BATCH the recommended way of updating all three tables at one go so
that the information between the three tables is consistent ?
If you're thinking about atomicity, no it's not atomic. Indeed with
logged batches, what you gain is automatic retry done for you by the
coordinator in case of
i find this solution:
http://www.liquidweb.com/kb/error-failed-to-connect-to-127-0-0-17199-connection-refused-cassandra-solved/
but i haven't this file at all !!
/etc/cassandra/default.conf/cassandra-env.sh
please, i have a dought about how to install cassandra.. i have only
downloaded the
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