Hi, Thank you so much for answers. Please, can you explain more what's metric libraries ? and give me some examples ?
Using nodetool status, to generate the history of my data center, i intend to proceed as follows: >From a node A: For i 1 ..24 hours (every 2 minutes do) ./nodetool status >> file.txt End For is it a good idea? Thanks a lot. Kind regards. 2018-07-05 1:30 GMT+01:00 Anthony Grasso <anthony.gra...@gmail.com>: > Hi, > > Yes, you can use nodetool status to inspect the health/status of the > cluster. Using *nodetool status <keyspace>* will show the cluster > health/status as well as the amount of data that each node has for the > specified *<keyspace>*. Using *nodetool status* without the <keyspace> > argument will only show the cluster health/status. > > Unless there is a special reason for using nodetool to capture history, > you may want to consider using metric libraries to capture and push > information about each node to a metric server. It is much easier to view > the data captured on the metric server as there are tools already made for > this. Using metrics libraries will save you time creating and maintaining a > parser for the nodetool output. It also makes monitoring the health of > cluster very easy. > > Regards, > Anthony > > On Sun, 1 Jul 2018 at 20:19, Thouraya TH <thouray...@gmail.com> wrote: > >> Hi, >> Thank you so much for answer. >> Please, is it possible to use this command ? >> >> nodetool status mykeyspace >> >> Datacenter: datacenter1 >> ======================= >> Status=Up/Down >> |/ State=Normal/Leaving/Joining/Moving >> -- Address Load Tokens Owns Host ID >> Rack >> UN 127.0.0.1 47.66 KB 1 33.3% >> aaa1b7c1-6049-4a08-ad3e-3697a0e30e10 rack1 >> UN 127.0.0.2 47.67 KB 1 33.3% >> 1848c369-4306-4874-afdf-5c1e95b8732e rack1 >> UN >> >> Thank you so much. >> Kind regards. >> >> 2018-06-29 1:40 GMT+01:00 Rahul Singh <rahul.xavier.si...@gmail.com>: >> >>> >>> >>> When you run TPstats or Tablestats subcommands in nodetool 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 <thouray...@gmail.com>, >>> wrote: >>> >>> 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. >>> >>> >>
