Re: Query on Data Modelling of a specific usecase

2017-04-18 Thread Naresh Yadav
Looking for cassandra expert's recommendation on above usecase, please reply. On Mon, Apr 17, 2017 at 7:37 PM, Naresh Yadav wrote: > Hi all, > > This is my existing table configured on apache-cassandra-3.0.9: > > CREATE TABLE report_id1 ( >mc_id text, >tag_id text, >e_date timestamp.

Re: Multiple nodes decommission

2017-04-18 Thread Jeff Jirsa
On 2017-04-12 11:30 (-0700), Vlad wrote: > Interesting, there is no such explicit warning for v.3 > https://docs.datastax.com/en/cassandra/3.0/cassandra/operations/opsAddNodeToCluster.html > It says >- Start the bootstrap node. >- verify that the node is fully bootstrapped and all o

Re: Exceptions when upgrade from 2.1.14 to 2.2.5

2017-04-18 Thread Jeff Jirsa
On 2017-04-18 18:57 (-0700), Dikang Gu wrote: > Hello there, > > We are upgrading one of our cluster from 2.1.14 to 2.2.5, but cassandra had > problems replaying the commit logs... > > Here is the exception, does anyone experience similar before? > > 2017-04-19_00:22:22.26911 ERROR 00:22:22

Re: Exceptions when upgrade from 2.1.14 to 2.2.5

2017-04-18 Thread Hannu Kröger
Hello, It seems that commit log is broken. One way to fix this would be to remove commit logs and then restart. This will cause you to lose the writes that were in the commit log but hopefully the data is in other nodes. In the future to avoid this: before you kill Cassandra, run “nodetool dra

Exceptions when upgrade from 2.1.14 to 2.2.5

2017-04-18 Thread Dikang Gu
Hello there, We are upgrading one of our cluster from 2.1.14 to 2.2.5, but cassandra had problems replaying the commit logs... Here is the exception, does anyone experience similar before? 2017-04-19_00:22:21.69943 DEBUG 00:22:21 [main]: Finished reading /data/cassandra/commitlog/CommitLog-4-148

high WMI CPU usage on Windows

2017-04-18 Thread Fredrik Skeel Løkke
Hi Does anyone know what Cassandra uses WMI for when running on Windows? We have some issues with high WMI CPU usage.. Yours sincerely / Med venlig hilsen Fredrik Løkke (FRSKL) Backend Architect, Application Development Plant Application (PA) Technology & Service Solutions (TSS) Vestas Tech