In a liquid chromatographic system, removing at least part of a volatile component from the liquid sample stream after separation by flowing it through a volatile component-removal device including a porous wall having a surface coating of a permeable polymer less than 10 \u03bcm thick. The monitoring component is for monitoring inputoutput activity for virtual storage logical units over time. The control blade identifies a set of command lines corresponding with the identified VPNs and VRs, and replays the set of command lines with an identity of a new processing engine to recreate the identified VPNs and VRs on the new processing engine. A phase-changeable material layer pattern is on the lower electrode, and an upper electrode is on the phase-changeable material layer pattern. The compound documents may be queried using statements that treat the compound document as a single XML document, or the parent document of a subdocument may be queried and treated independently. Based on the simulations, the system then implements one or more selected solutions.