Query on Cassandra clusters

2016-12-20 Thread Sumit Anvekar
I have a couple questions. 1. I have a Cassandra cluster with 11 nodes, 5 of which have Cassandra version 3.0.3 and then newer 5 nodes have 3.6.0 version. I has been running fine until recently I am seeing higher amount of data residing in newer boxes. The configuration file (YAML file) is

Why does Cassandra recommends Oracle JVM instead of OpenJDK?

2016-12-20 Thread Kant Kodali
Looking at this http://www.theregister.co.uk/2016/12/16/oracle_targets_java_users_non_compliance/?mt=1481919461669 I don't know why Cassandra recommends Oracle JVM? JVM is a great piece of software but I would like to stay away from Oracle as much as possible. Oracle is just horrible the way they

Re: Handling Leap second delay

2016-12-20 Thread Harikrishnan Pillai
http://www.datastax.com/dev/blog/preparing-for-the-leap-second-2017 [http://www.datastax.com/wp-content/themes/datastax-2013/images/common/logo.png] Preparing for the Leap Second, 2017 Jan 1 Edition |

Handling Leap second delay

2016-12-20 Thread Sanjeev T
Hi, Can some of you share points on, the versions and handling leap second delay on Dec 31, 2016. Regards -Sanjeev

Re: iostat -like tool to parse 'nodetool cfstats'

2016-12-20 Thread kurt Greaves
Anything in cfstats you should be able to retrieve through the metrics Mbeans. See https://cassandra.apache.org/doc/latest/operating/metrics.html On 20 December 2016 at 23:04, Richard L. Burton III wrote: > I haven't seen anything like that myself. It would be nice to have >

Re: Join_ring=false Use Cases

2016-12-20 Thread Carlos Rolo
Beware the Java Driver limitations around whitelisting IPs. Works fine in Python. Regards, Carlos Juzarte Rolo Cassandra Consultant / Datastax Certified Architect / Cassandra MVP Pythian - Love your data rolo@pythian | Twitter: @cjrolo | Skype: cjr2k3 | Linkedin:

Re: iostat -like tool to parse 'nodetool cfstats'

2016-12-20 Thread Richard L. Burton III
I haven't seen anything like that myself. It would be nice to have nodetool cfstats to be presented in a nicier format. If you plan to work on that, let me know. I would help contribute to it next month. On Tue, Dec 20, 2016 at 5:59 PM, Kevin Burton wrote: > nodetool

iostat -like tool to parse 'nodetool cfstats'

2016-12-20 Thread Kevin Burton
nodetool cfstats has some valuable data but what I would like is a 1 minute delta. Similar to iostat... It's easy to parse this but has anyone done it? I want to see IO throughput and load on C* for each table. -- We’re hiring if you know of any awesome Java Devops or Linux Operations

Re: Incremental repair for the first time

2016-12-20 Thread kurt Greaves
No workarounds, your best/only option is to upgrade (plus you get the benefit of loads of other bug fixes). On 16 December 2016 at 21:58, Kathiresan S wrote: > Thank you! > > Is any work around available for this version? > > Thanks, > Kathir > > > On Friday,

Re: Join_ring=false Use Cases

2016-12-20 Thread Matija Gobec
There is a talk from cassandra summit 2016 about coordinator nodes by Eric Lubow from SimpleReach. He explains how you can use that join_ring=false. On Tue, Dec 20, 2016 at 10:23 PM, kurt Greaves wrote: > It seems that you're correct in saying that writes don't propagate

Re: Join_ring=false Use Cases

2016-12-20 Thread kurt Greaves
It seems that you're correct in saying that writes don't propagate to a node that has join_ring set to false, so I'd say this is a flaw. In reality I can't see many actual use cases in regards to node outages with the current implementation. The main usage I'd think would be to have additional

Cipher Suite Cassandra 2.1.14 Encryption

2016-12-20 Thread Jacob Shadix
I was testing client encryption w/cqlsh and get the following error when using TLS_DHE_RSA_WITH_AES_128_GCM_SHA256 as the cipher. Any ideas why? Last error: _ssl.c:492: EOF occurred in violation of protocol")}) -- Jacob Shadix

Re: Join_ring=false Use Cases

2016-12-20 Thread Anuj Wadehra
No responses yet :) Any C* expert who could help on join_ring use case and the concern raised? Thanks Anuj On Tue, 13 Dec, 2016 at 11:31 PM, Anuj Wadehra wrote: Hi, I need to understand the use case of join_ring=false in case of node outages. As per

RE: FW: Cassandra trigger to send notifications

2016-12-20 Thread Oren Yekutieli
Got it. Thanks! Regards, Oren From: DuyHai Doan [mailto:doanduy...@gmail.com] Sent: Tuesday, December 20, 2016 10:11 AM To: user@cassandra.apache.org Subject: Re: FW: Cassandra trigger to send notifications Right now CDC is very very LOW LEVEL, you'll need to 1. Use a CommitLogReader to read

Re: FW: Cassandra trigger to send notifications

2016-12-20 Thread DuyHai Doan
Right now CDC is very very LOW LEVEL, you'll need to 1. Use a CommitLogReader to read the changes from the CDC files 2. Perform de-duplication by yourself I'll blog post a technical deep dive about CDC in the future once I have time to play with it On Mon, Dec 19, 2016 at 9:57 PM, Oren