ICAI-CMA Snapshots

Snapshots.

Lazy Snapshots

Determining the global state of distributed systems is an important problem in the absence of global memory and global clocks. Several algorithms have been proposed for collecting global states. This paper presents an optimization to the algorithm proposed by Chandy and Lamport that lets processes in a distributed system take a lazy approach to recording their state. The lazy optimization relax...

An ICAI architecture for troubleshooting in complex, dynamic systems

AHAB is an architecture for simulator-based ICAI)programs to teach troubleshooting in complex, dynamic environments. The architecture posits three elements of a computerized instructor: the task modet, the student model, and the instructional module. The task model is a prescriptive model of expert performance that uses symptomatic and topographic search strategies to provide students with dire...

CMA package vignette

Moreover, model selection and evaluation of prediction rules proves to be highly difficult in this situation for several reasons. Firstly, the hazard of overfitting, which is common to all prediction problems, is increased by high dimensionality. Secondly, the usual evaluation scheme based on the splitting into learning and test data sets often applies only partially in the case of small sample...

Dynamic Atomic Snapshots

Snapshots are useful tools for monitoring big distributed and parallel systems. In this paper, we adapt the well-known atomic snapshot abstraction to dynamic models with an unbounded number of participating processes. Our dynamic snapshot specification extends the API to allow changing the set of processes whose values should be returned from a scan operation. We introduce the ephemeral memory ...