Thanks a lot Anuj!
On Wed, Jan 16, 2019 at 4:56 PM Anuj Wadehra <anujw_2...@yahoo.co.in> wrote: > 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. > Thanks > Anuj > > > 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: > > 1. 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? > > 2. Can I run upgradesstables on several nodes in parallel? Is it > crucial to run it one node at a time? > > 3. When running upgradesstables on a node, does that node still serves > writes and reads? > > 4. Can I use open JDK 8 (instead of Oracle JDK) with C* 3.11.3? > > 5. Is there a way to speed up the upgradesstables process? (besides > compaction_throughput) > > > Thanks! > >
