RE: How do you monitoring Cassandra Cluster?

2018-06-21 Thread Jonathan Baynes
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Re: How do you monitoring Cassandra Cluster?

2018-06-21 Thread Rahul Singh
I’ve collected a bunch at http://leaves.anant.us/#!/?tag=cassandra,monitoring I reommend Grafana / Prometheus if you don’t have DSE (which has OpsCenter) -- Rahul Singh rahul.si...@anant.us Anant Corporation On Jun 19, 2018, 1:06 PM -0400, Romain Gérard , wrote: > Hi Felipe, > > You can use thi

RE: [EXTERNAL] Re: Tombstone

2018-06-21 Thread Rahul Singh
Queues can be implemented in Cassandra even though everyone believes its an “anti-pattern” if the design is designed for Cassandra’s model. In this case, I would do a logical / soft delete on the data to invalidate it from a query that accesses it and put a TTL on the data so it deletes automat

RE: how to avoid lightwieght transactions

2018-06-21 Thread Rahul Singh
A read before write is always going to be tremendously more than just writing. Depending on your architecture you may consider both of the options described. If you have a CQRS architecture and are processing an event queue — doing LWT / read before write , then your “write” is processed asynchr

RE: how to avoid lightwieght transactions

2018-06-21 Thread Jacques-Henri Berthemet
Hi, Another way would be to make your PK a clustering key with Id as PK and time as clustering with type TimeUUID. Then you’ll always insert records, never update, for each “transaction” you’ll keep a row in the partition. Then when you’ll read all the rows for that partition by Id, you’ll proc

Re: Network problems during repair make it hang on "Wait for validation to complete"

2018-06-21 Thread Dmitry Simonov
In the previous message, I have pasted source code from cassandra 2.2.8 by mistake. Re-checked for 2.2.11 source. These lines are the same. 2018-06-21 2:49 GMT+05:00 Dmitry Simonov : > Hello! > > Using Cassandra 2.2.11, I observe behaviour, that is very similar to > https://issues.apache.org/jira