Re: Version Upgrade

2018-05-03 Thread kurt greaves
> > In other words, if I am running Cassandra 1.2.x and upgrading to 2.0.x, > 2.0.x will continue to read all the old Cassandra 1.2.x table. However, if > I then want to upgrade to Cassandra 2.1.x, I’d better make sure all tables > have been upgraded to 2.0.x before making the next upgrade. Corre

Cassandra limitations

2018-05-03 Thread Abdul Patel
Hi , In my environment, we are coming up with 3 to 4 new projects , hence new keyspaces will be coming into picture. Do we have any limitations or performance issues when we hit to a number of keyspaces or number of nodes vs keyspaces? Also connections limitations if any? I know as data grows we

Re: Cassandra Summit 2019 / Cassandra Summit 2018

2018-05-03 Thread Ben Bromhead
Distributed Data Day is shaping up to look like a Cassandra related summit. See http://distributeddatasummit.com/2018-sf/speakers You'll most likely see all the same familiar faces and familiar vendors :) However note it is not the official Apache Cassandra Summit and it is being run by a for pro

RE: Version Upgrade

2018-05-03 Thread Ken Hancock
A related question: Is nodetool upgradesstables only necessary before you’re going to move major versions? I was under the impression that Cassandra N+1 could read the table format of Cassandra N. In other words, if I am running Cassandra 1.2.x and upgrading to 2.0.x, 2.0.x will continue to r

Re: Cassandra Summit 2019 / Cassandra Summit 2018

2018-05-03 Thread Horia Mocioi
Hello, Are there any updates on this event? Regards, Horia On tis, 2018-02-27 at 11:42 +, Carlos Rolo wrote: Hello all, I'm interested planning/organizing a small kinda of NGCC in Lisbon, Portugal in late May early June. Just waiting for the venue to confirm possible dates. Would be a 1da

答复: upgrade from 3.9 to 3.11.2

2018-05-03 Thread Xiangfei Ni
Thanks very much,Hannu,I got your point. Best Regards, 倪项菲/ David Ni 中移德电网络科技有限公司 Virtue Intelligent Network Ltd, co. Add: 2003,20F No.35 Luojia creative city,Luoyu Road,Wuhan,HuBei Mob: +86 13797007811|Tel: + 86 27 5024 2516 发件人: Hannu Kröger 发送时间: 2018年5月3日 15:16 收件人: user@cassandra.apache.or

Re: upgrade from 3.9 to 3.11.2

2018-05-03 Thread Hannu Kröger
Hi, It depends on your replication factor and consistency levels used. If you are not using consistency level of ALL in your applications and your replication factor is 3, then you usually don’t need to stop your frontend applications for the upgrade. If replication factor = 2 then you need to

答复: upgrade from 3.9 to 3.11.2

2018-05-03 Thread Xiangfei Ni
Thanks Hannu, Another question is that,do I need to stop the frontend application during the upgrade? I have 3 nodes cluster,let’s say: Cassandra01 Cassandra02 Cassandra03 First I upgrade the cassandra01 node, 1,nodetool drain 2,backup data 3,install new binary 4,configure the configuration file

Re: upgrade from 3.9 to 3.11.2

2018-05-03 Thread Hannu Kröger
Hello, it never hurts to run “nodetool upgradesstables" after the upgrade. It’s a no-op if there is nothing to upgrade. Hannu > On 3 May 2018, at 09:57, Xiangfei Ni wrote: > > Hi Community > I have a question regarding upgrading Cassandra from 3.9 to 3.11.2, > Do I need to run nodetool up