Hi Shalom, Just a suggestion. Before upgrading to 3.11.3 make sure you are not impacted by any open crtitical defects especially related to RT which may cause data loss e.g.14861. Please find my response below:
The upgrade process that I know of is from 2.0.14 to 2.1.x (higher than 2.1.9 I think) and then from 2.1.x to 3.x. Do I need to upgrade first to 3.0.x or can I upgraded directly from 2.1.x to 3.11.3? Response: Yes, you can upgrade from 2.0.14 to some latest stable version of 2.1.x (only 2.1.9+) and then upgrade to 3.11.3. Can I run upgradesstables on several nodes in parallel? Is it crucial to run it one node at a time? Response: Yes, you can run in parallel. When running upgradesstables on a node, does that node still serves writes and reads? Response: Yes. Can I use open JDK 8 (instead of Oracle JDK) with C* 3.11.3? Response: We have not tried but it should be okay. See https://issues.apache.org/jira/plugins/servlet/mobile#issue/CASSANDRA-13916. Is there a way to speed up the upgradesstables process? (besides compaction_throughput) Response: If clearing pending compactions caused by rewriting sstable is a concern,probably you can also try increasing concurrent compactors. Disclaimer: The information provided in above response is my personal opinion based on the best of my knowledge and experience. We do not take any responsibility and we are not liable for any damage caused by actions taken based on above information. ThanksAnuj On Wed, 16 Jan 2019 at 19:15, shalom sagges<shalomsag...@gmail.com> wrote: Hi All, I'm about to start a rolling upgrade process from version 2.0.14 to version 3.11.3. I have a few small questions: - The upgrade process that I know of is from 2.0.14 to 2.1.x (higher than 2.1.9 I think) and then from 2.1.x to 3.x. Do I need to upgrade first to 3.0.x or can I upgraded directly from 2.1.x to 3.11.3? - Can I run upgradesstables on several nodes in parallel? Is it crucial to run it one node at a time? - When running upgradesstables on a node, does that node still serves writes and reads? - Can I use open JDK 8 (instead of Oracle JDK) with C* 3.11.3? - Is there a way to speed up the upgradesstables process? (besides compaction_throughput) Thanks!
