  Due to high viscosity, glassy systems evolve slowly to the ordered state.
Results of molecular dynamics simulation reveal that the structural ordering in
glasses becomes observable over "experimental" (finite) time-scale for the
range of phase diagram with high values of pressure. We show that the
structural ordering in glasses at such conditions is initiated through the
nucleation mechanism, and the mechanism spreads to the states at extremely deep
levels of supercooling. We find that the scaled values of the nucleation time,
$\tau_1$ (average waiting time of the first nucleus with the critical size), in
glassy systems as a function of the reduced temperature, $\widetilde{T}$, are
collapsed onto a single line reproducible by the power-law dependence. This
scaling is supported by the simulation results for the model glassy systems for
a wide range of temperatures as well as by the experimental data for the
stoichiometric glasses at the temperatures near the glass transition.
