sstableloader making no progress

I am trying to ingest some data from a cluster to a different cluster via sstableloader. I am running DSE 4.8.7 / Cassandra 2.1.14. I have re-created the schemas and followed other instructions here: https://docs.datastax.com/en/cassandra/2.1/cassandra/tools/toolsBulkloader_t.html I am initially

Re: Nodetool cleanup error - cannot run before a node has joined the ring

Thank you Michael. Well, this was apparently my bad. 1. nodetool connects to the local JMX port 7199, which is indeed running on localhost in my case. 2. I did a few more attempts, the message "Aborted cleaning up atleast one column family in keyspace " only appears in the DC where is not

Re: Nodetool cleanup error - cannot run before a node has joined the ring

By default, yes, nodetool connects to localhost, which your log entries show. Use `nodetool -h $PRIV_IP cleanup ...` to connect to that private IP it's listening on. `nodetool help cleanup` for all options. -- Kind regards, Michael On 02/10/2017 02:22 PM, Simone Franzini wrote: > I am running

Nodetool cleanup error - cannot run before a node has joined the ring

I am running DSE 4.8.7 / Cassandra 2.1.14. When I attempt to run nodetool cleanup on any node / any environment we are managing, I get the following output: Aborted cleaning up atleast one column family in keyspace , check server logs for more information. error: nodetool failed, check server

Re: How does cassandra achieve Linearizability?

Thanks Ariel! Yes I knew there are so many variations and optimizations of Paxos. I just wanted to see if we had any plans on improving the existing Paxos implementation and it is great to see the work is under progress! I am going to follow that ticket and read up the references pointed in it

Re: How does cassandra achieve Linearizability?

Hi, Cassandra's implementation of Paxos doesn't implement many optimizations that would drastically improve throughput and latency. You need consensus, but it doesn't have to be exorbitantly expensive and fall over under any kind of contention. For instance you could implement EPaxos

Re: How does cassandra achieve Linearizability?

Hi Kant, If you read the published papers about Paxos, you will most probably recognize that there is no way to "do it better". This is a conceptional thing due to the nature of distributed systems + the CAP theorem. If you want A+P in the triangle, then C is very expensive. CS is made for A+P

Re: How does cassandra achieve Linearizability?

"That’s the safety blanket everyone wants but is extremely expensive, especially in Cassandra." yes LWT's are expensive. Are there any plans to make this better? On Fri, Feb 10, 2017 at 12:17 AM, Kant Kodali wrote: > Hi Jon, > > Thanks a lot for your response. I am well

Re: Error when running nodetool cleanup after adding a new node to a cluster

The nodetool cleanup ran successfully after setting the CLASSPATH variable to the kubernetes-cassandra.jar. Thanks. > On 09-Feb-2017, at 2:23 PM, Srinath Reddy wrote: > > Alex, > > Thanks for reply. I will try the workaround and post an update. > > Regards, > > Srinath

Re: cassandra user request log

If you want to audit write operations only, you could maybe use CDC, this is a quite new feature in 3.x (I think it was introduced in 3.9 or 3.10) 2017-02-10 10:10 GMT+01:00 vincent gromakowski < vincent.gromakow...@gmail.com>: > tx > > 2017-02-10 10:01 GMT+01:00 Benjamin Roth

Re: cassandra user request log

tx 2017-02-10 10:01 GMT+01:00 Benjamin Roth : > you could write a custom trigger that logs access to specific CFs. But be > aware that this may have a big performance impact. > > 2017-02-10 9:58 GMT+01:00 vincent gromakowski < > vincent.gromakow...@gmail.com>: > >> GDPR

Re: cassandra user request log

you could write a custom trigger that logs access to specific CFs. But be aware that this may have a big performance impact. 2017-02-10 9:58 GMT+01:00 vincent gromakowski : > GDPR compliancy...we need to trace user activity on personal data. Maybe > there is

Re: cassandra user request log

GDPR compliancy...we need to trace user activity on personal data. Maybe there is another way ? 2017-02-10 9:46 GMT+01:00 Benjamin Roth : > On a cluster with just a little bit load, that would cause zillions of > petabytes of logs (just roughly ;)). I don't think this is

Re: cassandra user request log

On a cluster with just a little bit load, that would cause zillions of petabytes of logs (just roughly ;)). I don't think this is viable. There are many many JMX metrics on an aggregated level. But none per authed used. What exactly do you want to find out? Is it for debugging purposes?

cassandra user request log

Hi all, Is there any way to trace user activity at the server level to see which user is accessing which data ? Do you thin it would be simple to implement ? Tx

Re: How does cassandra achieve Linearizability?

Hi Jon, Thanks a lot for your response. I am well aware that the LWW != LWT but I was talking more in terms of LWW with respective to LWT's which I believe you answered. so thanks much! kant On Thu, Feb 9, 2017 at 6:01 PM, Jon Haddad wrote: > LWT != Last Write Wins.