I find that there is no parameter in the function "openSync()" to set the RLS mode.
By experiment, I find when a VSAM file is opened in RLS mode, it can't be opened again by "openSync()". And when a VSAM file is opened by "openSync()", it can't be opened in RLS mode elsewhere.
So I think "openSync()" opens a VSAM file in non-RLS mode by default.
I find that there is no parameter in the function "openSync()" to set the RLS mode. By experiment, I find when a VSAM file is opened in RLS mode, it can't be opened again by "openSync()". And when a VSAM file is opened by "openSync()", it can't be opened in RLS mode elsewhere. So I think "openSync()" opens a VSAM file in non-RLS mode by default.