Streaming operations (repair/bootstrap) with different file versions is usually a problem. Running a mixed version cluster is fine – for the time you are doing the upgrade. I would not stay on mixed versions for any longer than that. It takes more time, but I separate out the admin tasks so that I can reason what should happen. I would either scale up or upgrade (depending on which is more urgent), then do the other.
Sean Durity From: manish khandelwal <manishkhandelwa...@gmail.com> Sent: Wednesday, June 24, 2020 5:52 AM To: user@cassandra.apache.org Subject: [EXTERNAL] Re: Cassandra upgrade from 3.11.3 -> 3.11.6 Rightly said by Surbhi, it is not good to scale with mixed versions as debugging issues will be very difficult. Better to upgrade first and then scale. Regards On Wed, Jun 24, 2020 at 11:20 AM Surbhi Gupta <surbhi.gupt...@gmail.com<mailto:surbhi.gupt...@gmail.com>> wrote: In case of any issue, it gets very difficult to debug when we have multiple versions. On Tue, 23 Jun 2020 at 22:23, Jürgen Albersdorfer <jalbersdor...@gmail.com<mailto:jalbersdor...@gmail.com>> wrote: Hi, I would say „It depends“ - as it always does. I have had a 21 Node Cluster running in Production in one DC with versions ranging from 3.11.1 to 3.11.6 without having had any single issue for over a year. I just upgraded all nodes to 3.11.6 for the sake of consistency. Von meinem iPhone gesendet Am 24.06.2020 um 02:56 schrieb Surbhi Gupta <surbhi.gupt...@gmail.com<mailto:surbhi.gupt...@gmail.com>>: Hi , We have recently upgraded from 3.11.0 to 3.11.5 . There is a sstable format change from 3.11.4 . We also had to expand the cluster and we also discussed about expansion first and than upgrade. But finally we upgraded and than expanded. As per our experience what I could tell you is, it is not advisable to add new nodes on higher version. There are many bugs which got fixed from 3.11.3 to 3.11.6. Thanks Surbhi On Tue, Jun 23, 2020 at 5:04 PM Jai Bheemsen Rao Dhanwada <jaibheem...@gmail.com<mailto:jaibheem...@gmail.com>> wrote: Hello, I am trying to upgrade from 3.11.3 to 3.11.6. Can I add new nodes with the 3.11.6 version to the cluster running with 3.11.3? Also, I see the SSTable format changed from mc-* to md-*, does this cause any issues? ________________________________ The information in this Internet Email is confidential and may be legally privileged. It is intended solely for the addressee. Access to this Email by anyone else is unauthorized. If you are not the intended recipient, any disclosure, copying, distribution or any action taken or omitted to be taken in reliance on it, is prohibited and may be unlawful. When addressed to our clients any opinions or advice contained in this Email are subject to the terms and conditions expressed in any applicable governing The Home Depot terms of business or client engagement letter. The Home Depot disclaims all responsibility and liability for the accuracy and content of this attachment and for any damages or losses arising from any inaccuracies, errors, viruses, e.g., worms, trojan horses, etc., or other items of a destructive nature, which may be contained in this attachment and shall not be liable for direct, indirect, consequential or special damages in connection with this e-mail message or its attachment.
