Saving a file using cassandra

Hello, Finally, i have created my ring using cassandra. Please, i'd like to store a file replicated 2 times in my cluster. is that possible ? can you please send me a link for a tutorial ? Thanks a lot. Best Regards.

Begginer with cassandra Apache - Gossip

Hello All, Please, i'm newer with cassandra Apache. i'm sooo interested. i know some details about its architecture, some details also about gossip protocol. I'd like to test it, to more understand :) i ask if there is a howto tutorial that can help me ? Thanks a lot for help. Best Regards.

Re: [RELEASE] Apache Cassandra 2.0.13 released

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

Re: Begginer with cassandra Apache - Gossip

this helps. Cheers, Akhil On 16/03/2015, at 8:13 am, jean paul researche...@gmail.com wrote: Hello All, Please, i'm newer with cassandra Apache. i'm sooo interested. i know some details about its architecture, some details also about gossip protocol. I'd like to test it, to more understand

Re: [RELEASE] Apache Cassandra 2.0.13 released

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 11:34 AM, jean paul wrote: Hello, Please, i have a cluster of 10 nodes, so i have to download the last version

Re: nodetool help

server. On Tue, Mar 17, 2015 at 12:50 AM, jean paul researche...@gmail.com wrote: 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

Re: Begginer with cassandra Apache - Gossip

. 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 ) Not sure why you trying to dig into the code? Cheers, Akhil On 17/03/2015, at 12:00 am, jean paul

Re: nodetool help

Hello All, I launched the script (./cassandra-install.sh) without making any changes and it works. Then: *First Terminal:* $cassandra ... INFO 10:52:26,655 Node /127.0.0.1 state jump to normal INFO 10:52:26,791 Starting listening for CQL clients on

Re: nodetool help

In my case,i have: UN *127.0.0.1* 83.05 KB 256 100.0% 460ddcd9-1ee8-48b8-a618-c076056aad07 rack1 i'd like to change the ip address like: UN *192.168.1.4* so i have to modify the file cassandra.yam # Setting this to 0.0.0.0 is always wrong. *listen_address: localhost* --

Re: nodetool help

links. On Tue, Mar 17, 2015 at 3:42 PM, jean paul researche...@gmail.com wrote: Hello All, I launched the script (./cassandra-install.sh) without making any changes and it works. Then: *First Terminal:* $cassandra ... INFO 10:52:26,655 Node /127.0.0.1 state jump

Seed Node

Hello All, Please,i have a question a bout the seed node.. as i read it is the bootstrap node, each new node joins the seed node that's it? if it leaves the cluster, how can a new node joins the rest of the group ? Thanks a lot for answer. Best Regards.

Re: Store data with cassandra

/demo/users# ls :/var/lib/cassandra/data/demo/users# i find nothing in /var/lib/cassandra/data/demo/users! 2015-03-20 13:06 GMT+01:00 jean paul researche...@gmail.com: Hello All; Please, i have created this table. lastname | age | city | email | firstname

Re: Store data with cassandra

not manage files, it manages data in a highly distributed cluster. If you are attempting to manage files, you are quite simply using the wrong tool and Cassandra is not for you. On Fri, Mar 20, 2015 at 9:10 AM, jean paul researche...@gmail.com wrote: I have used this tutoriel to create my

Re: Store data with cassandra

have to personally be vetted by the cassandra community. Only if they're found to not contain anything inappropriate, does cassandra let you store them. (A 3/4 majority vote is necessary). Please send your files for approval to j...@reallycereal.com On Fri, Mar 20, 2015 at 8:41 PM, jean paul

Store data with cassandra

Hello All; Please, i have created this table. lastname | age | city | email | firstname --+-+---+-+--- Doe | 36 | Beverly Hills | jane...@email.com | Jane Byrne | 24 | San Diego | robby...@email.com |

Re: Store data with cassandra

Please, can you explain details in this two links: https://wiki.apache.org/cassandra/FAQ#large_file_and_blob_storage http://stackoverflow.com/questions/9219222/how-to-store-small-files-in-cassandra

Re: Store data with cassandra

20, 2015 at 8:49 PM, jean paul researche...@gmail.com wrote: i'd like to store MyFile.txt using cassandra (replicat = 2) and see on what node the file and its replicas are stored on my cluster of 10 nodes it is a simple file with simple content (text) is that possible ? 2015-03-20 16

Re: nodetool help

./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

Re: [RELEASE] Apache Cassandra 2.0.13 released

restart cassandra ... 2015-03-16 18:59 GMT+01:00 jean paul researche...@gmail.com: I have done the same test again but i have errors with the two versions 2.1.3 and 2.0.13 :~/Bureau/apache-cassandra-*2.1.3*/bin$ ./cassandra -f CompilerOracle: inline org/apache/cassandra/db

Re: nodetool help

# . */nodetool infoFailed to connect to '127.0.0.1:7199 http://127.0.0.1:7199': Connexion refusée* 2015-03-16 19:50 GMT+01:00 jean paul researche...@gmail.com: ./nodetool help gossipinfo NAME nodetool gossipinfo - Shows the gossip information for the cluster SYNOPSIS

Re: Begginer with cassandra Apache - Gossip

, jean paul researche...@gmail.com wrote: Ok i will read all documents :) thanks a lot for help :) Please, can i you send me some details (url of source code) about the implementation of gossip protocol used in cassandra ? thanks a lot for help :) i find this https://github.com/bpot/node-gossip

Re: nodetool help

the paquet et used the command inside the bin directory! that's it ? i can't find a file install.sh for example... 2015-03-16 20:11 GMT+01:00 jean paul researche...@gmail.com: i can test './cqlsh' command but not with nodetool ! /Bureau/apache-cassandra-2.0.13/bin# ./cqlsh Connected to Test Cluster

Gossip Threshold

Hi all; I have used Apache Cassandra version 2.1.6 for my experiments. Please, what is the gossip delay or threshold ? The gossip process is running every . seconds ? Thank you so much for help. Kind regards.

Re: Gossip Threshold

As i find in cassandra Documentation, the gossip process runs every second. Please, why you have chosen 'running it *every second'* ? Thanks a lot. 2016-07-25 13:12 GMT+01:00 jean paul <researche...@gmail.com>: > Hi all; > > I have used Apache Cassandra version 2.1.6 for

Question nodetool status

Hi all, *$nodetool status*Datacenter: datacenter1 === Status=Up/Down |/ State=Normal/Leaving/Joining/Moving -- AddressLoad Tokens Owns (effective) Host ID Rack *UN 127.0.0.1 83.05 KB 256 100.0%

Re: Question nodetool status

nds (using gossip protocol), it's therefore marked 'DN: down' ? That's it? 2016-08-11 13:51 GMT+01:00 Romain Hardouin <romainh...@yahoo.fr>: > Hi Jean Paul, > > Yes, the gossiper is used. Example with down nodes: > 1. The status command retrieve unreachable nodes from a

Motivation for a DHT ring

Hi all, Please, What is the motivation for choosing a DHT ring in cassandra? Why not use a normal parallel or distributed file system that supports replication? Thank you so much for clarification. Kind regards.

Re: Motivation for a DHT ring

2016-06-28 22:29 GMT+01:00 jean paul <researche...@gmail.com>: > Hi all, > > Please, What is the motivation for choosing a DHT ring in cassandra? Why > not use a normal parallel or distributed file system that supports > replication? > > Thank you so much for clarification. > > Kind regards. >

Scalability of Gossip protocol

Hi all; Please is there a scientific study that evaluates the scalability of Gossip protocol ? Thank you so much for help Kind regards.

lack of space for replicas

Hi, The distributed replicas take space. Is there a scenario when a new replicas cannot be stored on a node due to lack of space? If we choose a replication factor =3, and we can find a space for the third replicas, how cassandra treats this case. Please, where can i find the algorithm ? Thank

Re: Scalability of Gossip protocol

jira/browse/CASSANDRA-12345 > > > > One of the sub-tickets there is https://issues.apache.org/ > jira/browse/CASSANDRA-12347 > > > > That ticket links to a relevant paper on the subject (and an alternative > to the existing approach): http://www.gsd.inesc-id.pt/~ > jle

All nodes hosting replicas down

Hi, Please, if we choose a replication factor =2 (simple strategy), so, we have two replicas of data on the ring. What happen in the case of all nodes containing replicas are down ? Thank you so much for help. Kind regards.

Re: All nodes hosting replicas down

too. > > On Sun, Dec 18, 2016 at 7:47 PM, jean paul <researche...@gmail.com> wrote: > >> Hi, >> >> Please, if we choose a replication factor =2 (simple strategy), so, we >> have two replicas of data on the ring. >> >> What happen in the case of all

Re: Motivation for a DHT ring

a distributed file system as >> well as a Cassandra cluster. This was a personal reason why I chose >> Cassandra instead of HBase for a project. >> >> Cheers, >> Jens >> >> Den ons 29 juni 2016 13:01jean paul <researche...@gmail.com> skrev: >&g

Re: Nodes marked dead…. leap second?

Hi, I did have the same problem with cassandra 1.1.1 on Ubuntu 11.10 I had to reboot all nodes I'm interested in any information about this. Thanks Jean Paul 2012/7/2 Filippo Diotalevi fili...@ntoklo.com Hi, we had some really weird issues during the weekend, with our cassandra nodes

Cassandra partitioning and limit

limited to 2 billions entries? Thanks! note: my english is not so good, feel free to ask me questions if needed -- - Jean Paul Adant - Créative-Ingénierie jean.paul.ad...@gmail.com