hi there.
firstly, sorry for my English, it's not my native language.
I’m running Transmission on my router, so verifying local data requires quite long time. and if i need to add just a single file I have to wait. Is it possible to run verifying data and downloading new file at the same time?
If you mean another file within the same torrent then it can't really do it since the hashes (a.k.a checksums) are not per file but per data block, which can be from several files depending on size (both piece size and file size).
If you mean another torrent then it should already do so.
blacke4dawn, "new file" - means new torrent file which contains old files and a new one. ok, we need to recalc hashes for existent parts, but we know blocks which are related to new file and we can start featching them before recalc is finished, cant we?
Technically I don't see why we couldn't do so but I think it's more of practical thing, that is to give the correct information about which blocks you do have and what blocks you want to fetch.