When using MS SQL mirroring, changed rows on the principal are pushed to the mirror.
What I imagine/guess is that the data itself is pushed over, but not indexes. (I imagine this because I think of indexes as a secondary entity that exists to improve performance, not the data per se.)
And so for example after reorganizing or rebuilding the indexes on the principal, I imagine this would not be pushed to the mirror. Good news is, it doesn't cause a surge in mirror traffic. Bad news is, the indexes must also be reorgged or rebuilt on the mirror (if desired).
Is this correct -- are indexes part of what is pushed to the mirror, or not?