The tangent depot

As part of rewriting history, Helix Server makes use of the tangent depot; the tangent depot is a system-generated, read-only location in which the p4 fetch -t command stores conflicting changes. The p4 fetch -t command automatically creates the tangent depot named tangent if one does not already exist. This is further explained in the next section, Resolve conflicts by rewriting local history.

For more information on the various kinds of depots, including the tangent depot, see the p4 depot chapter in the Helix Core Command-Line (P4) Reference.