RE: [EXTERNAL] Re: Upgrade strategy for high number of nodes

2019-12-02 Thread Durity, Sean R
1:00 AM To: user@cassandra.apache.org Subject: [EXTERNAL] Re: Upgrade strategy for high number of nodes Thanks for pointer. We haven't much changed data model since long, so before workarounds (scrub) worth understanding root cause of problem. This might be reason why running upgradesstabl

Re: Upgrade strategy for high number of nodes

2019-11-29 Thread Shishir Kumar
Thanks for pointer. We haven't much changed data model since long, so before workarounds (scrub) worth understanding root cause of problem. This might be reason why running upgradesstables in parallel was not recommended. -Shishir On Sat, 30 Nov 2019, 10:37 Jeff Jirsa, wrote: > Scrub really shou

Re: Upgrade strategy for high number of nodes

2019-11-29 Thread Jeff Jirsa
Scrub really shouldn’t be required here. If there’s ever a step that reports corruption, it’s either a very very old table where you dropped columns previously or did something “wrong” in the past or a software bug. The old dropped column really should be obvious in the stack trace - anything

Re: Upgrade strategy for high number of nodes

2019-11-29 Thread Shishir Kumar
Some more background. We are planning (tested) binary upgrade across all nodes without downtime. As next step running upgradesstables. As C* file format and version (from format big, version mc to format bti, version aa (Refer https://docs.datastax.com/en/dse/6.0/dse-admin/datastax_enterprise/tools

Re: Upgrade strategy for high number of nodes

2019-11-29 Thread Josh Snyder
Hello Shishir, It shouldn't be necessary to take downtime to perform upgrades of a Cassandra cluster. It sounds like the biggest issue you're facing is the upgradesstables step. upgradesstables is not strictly necessary before a Cassandra node re-enters the cluster to serve traffic; in my experien

Upgrade strategy for high number of nodes

2019-11-29 Thread Shishir Kumar
Hi, Need input on cassandra upgrade strategy for below: 1. We have Datacenter across 4 geography (multiple isolated deployments in each DC). 2. Number of Cassandra nodes in each deployment is between 6 to 24 3. Data volume on each nodes between 150 to 400 GB 4. All production environment has DR se