Abstract: Techniques are described herein for implementing, deploying, and utilizing an in-memory information access framework for enterprise data using highly-resolved, semantically-complete, read-only data objects. Extraction workloads efficiently access enterprise data without incurring significant performance degradation to transaction entry workloads. Consumers access enterprise information in a user-intelligible fashion without any knowledge of the underlying data storage and relationship details of complex physical schema designs. Consumers access subsets of the read-only data objects by defining reusable and parametrized data slices. Consumers combine related data slices into data slice collections. Initially, the system receives a request for a dataset by specifying a data slice. The system accesses metadata for an object or view associated with the data slice to determine operations for accessing the requested dataset. The system generates a database query for retrieving the requested dataset.

Abstract: Techniques are described for implementing an out-of-band communication channel used to exchange control channel information in sub-carrier-based optical communication systems. In an example implementation, a transmitter includes a laser operable to supply an optical signal, a digital signal processor operable to supply first electrical signals based on first data input to the digital signal processor and second data input to the digital signal processor, digital-to-analog conversion circuitry operable to output second electrical signals based on the first electrical signals, modulator driver circuitry is operable to output third electrical signals based on the second electrical signals, and an optical modulator operable to supply first and second modulated optical signals based on the third electrical signals. The first modulated optical signal includes a plurality of optical subcarriers carrying user data. The plurality of optical subcarriers also being amplitude modulated to carry control information.