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Why the 72 hours wait?

henk_stobbe
DynaMight Leader
DynaMight Leader

Good morning managed fans,

 

In the documentation I read below:

Following removal of an existing cluster node, you must wait 72 hours before installing a new node on a host that shares the same IP (i.e., when re-installing on the same host).

https://docs.dynatrace.com/managed/managed-cluster/installation/add-a-new-cluster-node

 

I really like to know the why behind this, and what happens if you do not wait and also underlying, can we speedup this?

To make it more interesting, what if we replace the hardware, keep original IP and restore all Dyntrace files?

 

KR Henk

 

 

2 REPLIES 2

Yosi_Neuman
DynaMight Guru
DynaMight Guru

Hi @henk_stobbe 

AFAIK its because of Cassandra.

Here is what ChatGPT says about how long its take Cassandra to forget the IP ...

Yosi_Neuman_0-1748097310576.png

If you don't wait there is a chance that the cluster will not get back to healthy state, and you will need to use cassandra-nodetool.sh in order to set it back to work.

HTH

Yos 

 

dynatrace certificated professional - dynatrace master partner - Matrix Soft Ware Division - Israel

Hi Yos,

Thanks for your reply, on a Saterday you earn 2 kudo's. Sorry can only give the 1

Thanks Henk

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