I would like to know if, when doing "php bin/magento indexer:reindex" the folders "var", "generated" and "pub/static" have to be writable ?
Alternatively, does reindexing only work at database level?
All advice and opinions are welcome! Thanks!
As per my knowledge, indexing is done only on database level.
Magento Indexer tracks database changes for a certain entity and performs re-index if required.
So, if we talk about:
var: it contains cache,log report etc generated: contains class files pub/static : Static view files
For testing purpose, I have set
sudo chmod -R 444 . to
pub/static folder then ran indexer and it worked!
You can check more detail at: official document