Re: Check Cluster Health

a metrics like > Client r-w latencies, node status, jvm metrics and such. > https://github.com/prometheus/jmx_exporter > > > > > 2018-07-06 18:01 GMT+03:00 Thouraya TH : > >> >> >> 2018-07-06 13:04 GMT+01:00 Simon Fontana Oscarsson < >> simon.fontana.o

Re: Check Cluster Health

gards. 2018-07-06 16:01 GMT+01:00 Thouraya TH : > > > 2018-07-06 13:04 GMT+01:00 Simon Fontana Oscarsson < > simon.fontana.oscars...@ericsson.com>: > >> Running nodetool status is okay if you want the simplest solution. >> But it generates a lot of output and cre

Re: Check Cluster Health

atan 1 > 37133 Karlskrona, Sweden > simon.fontana.oscars...@ericsson.com > www.ericsson.com > > On fre, 2018-07-06 at 11:18 +0100, Thouraya TH wrote: > > Hi, > > Thank you so much for answers. > > > > Please, can you explain more what's metric libraries ? and give

Re: Check Cluster Health

also makes monitoring the health of > cluster very easy. > > Regards, > Anthony > > On Sun, 1 Jul 2018 at 20:19, Thouraya TH wrote: > >> Hi, >> Thank you so much for answer. >> Please, is it possible to use this command ? >> >> nodetool stat

Re: nodetool status

dra-3.11/ > src/java/org/apache/cassandra/tools/nodetool/Status.java > > On Tue, Jul 3, 2018 at 7:57 AM, Thouraya TH wrote: > >> Hi all, >> Please, can you give me a link to the source code behind the command >> "nodetool status" ? >> Thank you so mu

nodetool status

Hi all, Please, can you give me a link to the source code behind the command "nodetool status" ? Thank you so much. KInd regards.

Re: Check Cluster Health

l you are > actually accessing data inside Cassandra via JMX. > > You can start there at first. > > Rahul > On Jun 28, 2018, 10:55 AM -0500, Thouraya TH , > wrote: > > Hi, > > Please, how can check the health of my cluster / data center using > cassandra ? > In fa

Check Cluster Health

Hi, Please, how can check the health of my cluster / data center using cassandra ? In fact i'd like to generate a hitory of the state of each node. an history about the failure of my cluster ( 20% of failure in a day, 40% of failure in a day etc...) Thank you so much. Kind regards.

"DHT cassandra VS DHT GlusterFS

Hello, Please is there a comparision study "DHT cassandra VS DHT GlusterFS" ? Thanks for help.

Re: Question about SELECT command

nso | Software Engineer | @calonso <https://twitter.com/calonso> > > On 17 March 2016 at 16:10, Thouraya TH wrote: > >> Hi all; >> >> Please, i have a question about the architecure behind SELECT command. >> Given this table:

Question about SELECT command

Hi all; Please, i have a question about the architecure behind SELECT command. Given this table: c1 c2 c3 value1 value2 value3 ... etc... lines of this table are distributed over nodes that's it ? Thank you so much for

Re: Question about SELECT command

tested it and i can get the list of all elements from ANY NODE. Bests. 2016-03-17 16:10 GMT+01:00 Thouraya TH : > Hi all; > > Please, i have a question about the architecure behind SELECT command. > Given this table: > > c1 c2 c3 > v

Re: Gossip Protocol

Can you give me more details please ? Thanks a lot. 2016-02-21 20:24 GMT+01:00 Jonathan Haddad : > You don't need to use Gossip to store that, you can just put it in a > table. > > On Sun, Feb 21, 2016 at 9:38 AM Thouraya TH wrote: > >> Thank you so much for answers

Re: Gossip Protocol

ssandra/blob/cassandra-3.1.1/src/java/org/apache/cassandra/gms/ApplicationState.java > > That application state is not currently user-extensible for Cassandra > users. > > What type of info did you wish to pass around? > > > -- Jack Krupansky > > On Sun, Feb 21, 2016 a

Gossip Protocol

Hi all; Please, where can i find what are the details saved by gossip protocol ? Is it possible to add other informations to informations exchanged between nodes using gossip protcol ? Thank you so much. Kind regards.

How Cassandra reduce the size of stored data ?

Hi all, Please, is there a scientific paper about this topic "How Cassandra reduce the size of stored data on nodes and exchanged between nodes"? Thank you so much for help. Best Regards.

Re: Concurrency in Cassandra

nswer a lot of the questions you're likely to ask next, including > this one. > > https://academy.datastax.com/courses/ds101-introduction-cassandra > > On Tue, Sep 15, 2015 at 2:04 PM Thouraya TH wrote: > >> Hi all; >> >> >> Please, is it possible to

Concurrency in Cassandra

Hi all; Please, is it possible to use insert queries in parallel at the same time in two different nodes ? Or, i will a concurrency problem ? Thanks you so much for answers. Best regards.

Re: Question: Gossip Protocol

, to three seconds ? Kind regards. 2015-09-14 14:15 GMT+01:00 Thouraya TH : > Hi all, > > Please, the gossip procotol in cassandra is running every ... seconds ? > > > Thank you so much for answers. > Best Regards. >

Question: Gossip Protocol

Hi all, Please, the gossip procotol in cassandra is running every ... seconds ? Thank you so much for answers. Best Regards.

Question: Coordinator in cassandra

Hi all; Please with the version cassandra 2.0.6, we have by default one coordinator per data center, per client or per query ? Thank you so much for help. Kind Regards.

Hash function

Hi all, Each node in cassandra ring has a unique identifier "nodeID" of 128bytes, obtained by a hashing of ? ip address ? Thank you so much for help. Kind Regards.

Understanding Cassandra Architecture

Hi all, 1- I have 4 nodes A, B, C, and D (A is the seed node). I have modified seed node address and listen address of each Cassandra.yaml file (I have modified nothing else) 2- Then, from A: CREATE KEYSPACE my_keyspace WITH REPLICATION = {‘class’:’Simple Strategy, ‘replication_factor’

Understanding gossip protocol in cassandra

Hi all, Please, i try to undestand how gossip protocol is used in cassandra. I read this: “This is most critical the first time a node starts up. By default, a node remembers other nodes it has gossiped with between subsequent restarts. *The seed node designation has no purpose other than boo

Re: phi_convict_threshold

Ok, thank you so much for answer. Kind Regards. 2015-08-03 15:09 GMT+01:00 DuyHai Doan : > Yes it is used by Gossip > > On Mon, Aug 3, 2015 at 3:33 PM, Thouraya TH wrote: > >> Ok, i will see this reference. thank you so much for answer. >> So i understand that this

Re: phi_convict_threshold

algo: http://vsedach.googlepages.com/HDY04.pdf > > The phi value is the level of suspicion a server might be down. > phi_convict_threshold = suspicion level above which a server is marked down > > > On Mon, Aug 3, 2015 at 1:29 PM, Thouraya TH wrote: > >> Hi all, >> >> P

phi_convict_threshold

Hi all, Please, can you explain me this sentence: The configuration parameter phi_convict_threshold in the cassandra.yaml file is used to control Cassandra’s sensitivity of node failure detection. ? Thank you so much for help. Kind regards.

Re: Scientific Paper of Gossip Protocol

py protocols. > In Proceedings > of the 2nd Large Scale Distributed Systems and Middleware Workshop (LADIS > '08) > > - bharat > > On Sun, Aug 2, 2015 at 10:31 AM, Thouraya TH wrote: > >> Hi all, >> >> Please, is there Scientific Paper of Gossip

Scientific Paper of Gossip Protocol

Hi all, Please, is there Scientific Paper of Gossip Protocol (algorithm) used by cassandra i need a paper published in a conference or in a journal. ? Thank you so much for help. Kind Regards.

Re: nodetool getendpoints options

query returned two nodes, that indicates your > keyspaces has RF=2 (also the fact that the sum of your ring has 200% > ownership indicates RF=2). > > > > > On Mon, Jul 20, 2015 at 10:38 AM, Thouraya TH > wrote: > >> Please, what is the difference between 1) and 2) &g

Re: nodetool getendpoints options

Please, what is the difference between 1) and 2) http://pastie.org/private/ydziir2376ru58ywrjq Bests. 2015-07-20 12:55 GMT+01:00 Thouraya TH : > Hi all, > > Please, is that possible to change this command: > > nodetool getendpoints MyKeyspace MyTable text > 10.147.243.4 >

nodetool getendpoints options

Hi all, Please, is that possible to change this command: nodetool getendpoints MyKeyspace MyTable text 10.147.243.4 10.147.243.5 to nodetool getendpoints MyKeyspace MyTable text="Hello" ? is there a solution to get more details about mes rows ? Thanks a lot. Best Regards.

Question: cassandra ring

Hi all, I'm trying to set up this environnement: i have two hosts A and B and 6 vms: On Host 'A', i have three guests : x, y and z On Host 'B' i have three guests : e, f and g I have launched cassandra on all guests (seed node: x) Now i'd like to start cassandra on the two Hosts A and B. (seed

Tracking changes of state of nodes.

Hi all, Please, is there someone who has tested this case. Tracking changes of state of nodes. Datacenter: 147 === Status=Up/Down |/ State=Normal/Leaving/Joining/Moving -- AddressLoad Tokens Owns (effective) Host ID Rack *UN* 10.147.243

starting cassandra remotely

Hello all, Please, i try to start cassandra remotely but it didn't work. i don't find cassandra process when using ps aux|grep cassandra ssh -t root@g-8 -x "sshpass -p 'ubuntu' ssh -t root@10.147.243.163 -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -x '/home/apache-cassandra-2.1.6/

how the binary ‘cassandra’ will recognize the path to the file cassandra.yaml ?

Hi all; I have, yesterday, downloaded cassandra archive and unpack it. I have this following structure: https://www.dropbox.com/s/4s0xb1os3gi8dr6/cassandra.PNG?dl=0 I have change some configs in the yaml (listen_address, seeds, rpc_address). My question: how the binary ‘cassandra’ will recogniz