Milvus Standalone upgrade from version 2.4.0 to 2.6.3

[deepvita123]

Hi Team

I have deployed Milvus version 2.4.0 in standalone mode in my project, and it contains all my data collections.
Now I want to upgrade Milvus to the new version 2.6.3 standalone mode.
I have some questions below:

Question 1
Is a direct upgrade from Milvus 2.4.0 to Milvus 2.6.3 possible?
Considering the entire data stored in Milvus 2.4.0, will it work smoothly with Milvus 2.6.3 without any issues?
What are the official recommendations according to the Milvus documentation?

Question 2
If I create a new Milvus instance in parallel on Milvus Standalone 2.6.3,
can I export all data collections from the old Milvus instance (2.4.0) and import them into the new Milvus instance (2.6.3)?
If yes, how?
What is the best recommended method according to the official Milvus documentation?

Question 3
When I create a new Milvus instance in standalone mode on Milvus 2.6.3,
can I attach or link the old Milvus 2.4.0 PVC to the new Milvus 2.6.3 instance?
If yes, then what is the best way to do it according to Milvus documentation?

Regards
Deepak Sharma

[xiaofan-luan]

1. Milvus 2.4.0 need to upgrade to 2.4.23, and then 2.5 latest, and then 2.6.6, this is the recommended way. I'm not hundred percent sure direcly upgrade would success, but most likely yes.
2. please use 2.6.6 or version behind it.
3. backup tool will help you to back your data and you can restore to a new instance.
4. you can copy pvc, but don't forget to copy etcd pvc as well. You need to keep etcd and milvus storage consistent