Additional data collection schemes

[raymondWWW]

desired default: 1/2 flash trans 1/2 flash
desired other options:
a. flash trans, trans, trans, .......
b. flash, trans, flash, trans, flash, trans,
c. flash, trans, trans, trans .... flash
gravy options
d. CD = (right - left)/(right+left)

[asarnow]

Current scheme is 0.5 flash / trans / 0.5 flash. Additional collection schemes should be added in case of long time processes, e.g. aggregation.