Thank you. In regards to my second inquiry, as we plan for C* upgrades, I did not find the NEWS.txt always to be telling of possible upgrade paths. Is there a rule of thumb or may be an official reference for upgrade paths?
---------------- Thank you From: Alexander Dejanovski Sent: Wednesday, March 28, 2018 1:58 PM To: user@cassandra.apache.org Subject: Re: Cassandra upgrade from 2.2.8 to 3.10 You can perform an upgrade from 2.2.x straight to 3.11.2, but the op suggests adding nodes in 3.10 to a cluster that runs 2.2.8, which is why Jeff says it won't work. I see no reason to upgrade to 3.10 and not 3.11.2 by the way. On Wed, Mar 28, 2018 at 5:10 PM Fred Habash <fmhab...@gmail.com> wrote: Hi ... I'm finding anecdotal evidence on the internet that we are able to upgrade 2.2.8 to latest 3.11.2. Post below indicates that you can upgrade to latest 3.x from 2.1.9 because 3.x no longer requires 'structured upgrade path'. I just want to confirm that such upgrade is supported. If yes, where can I find official documentation showing upgrade path across releases. https://stackoverflow.com/questions/42094935/apache-cassandra-upgrade-3-x-from-2-1 Thanks On Mon, Aug 7, 2017 at 5:58 PM, ZAIDI, ASAD A <az1...@att.com> wrote: Hi folks, I’ve question on upgrade method I’m thinking to execute. I’m planning from apache-Cassandra 2.2.8 to release 3.10. My Cassandra cluster is configured like one rack with two Datacenters like: 1. DC1 has 4 nodes 2. DC2 has 16 nodes We’re adding another 12 nodes and would eventually need to remove those 4 nodes in DC1. I’m thinking to add another third data center with like DC3 with 12 nodes having apache Cassandra 3.10 installed. Then, I start upgrading seed nodes first in DC1 & DC2 – once all 20nodes in ( DC1 plus DC2) upgraded – I can safely remove 4 DC1 nodes, can you guys please let me know if this approach would work? I’m concerned if having mixed version on Cassandra nodes may cause any issues like in streaming data/sstables from existing DC to newly created third DC with version 3.10 installed, will nodes in DC3 join the cluster with data without issues? Thanks/Asad -- Thank you ... ---------------------------------------- Fred Habash, Database Solutions Architect (Oracle OCP 8i,9i,10g,11g) -- ----------------- Alexander Dejanovski France @alexanderdeja Consultant Apache Cassandra Consulting http://www.thelastpickle.com
