Clojurians Log v2

when submitting a transaction with datomic pro, does a vector? not preserve its type on the transactor? I thought I remember a doc page about this but not finding it now. What checks should I be using for checking something is a lookup ref on the transactor? Does (and (seqable? current-value) (= 2 (count current-value)) (keyword? (first current-value))) look ok?

am i correct that excision is meant to strip out all historical values as well? i appear to have some historical values for an excised attribute on an entity, they are still available to (d/datoms (d/history ...) ...) , even after sync-excise on d/basis-t completes. i didn't use before or beforeT : {:db/excise ID :db.excise/attrs [:attr1 :attr2]}

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scenario: excising PII from prod db restored to a non-prod environment. would it improve indexing performance in any manner if the transactor didn't have any connected peers while it reindexed after a large excision (hundreds of thousands of entities with ~10 datoms each)? what else could improve performance? would increasing writeConcurrency from 4 help? if so, what is a safe upperbound value to set it to? update: found index-parallelism! is 8 the maximum? would a higher number make it any faster? thanks 😄