A cyber infrastructure for the SKA Telescope Manager

Abstract

The Square Kilometre Array Telescope Manager (SKA TM) will be responsible for assisting the SKA Operations and Observation Management, carrying out System diagnosis and collecting Monitoring & Control data from the SKA subsystems and components. To provide adequate compute resources, scalability, operation continuity and high availability, as well as strict Quality of Service, the TM cyber-infrastructure (embodied in the Local Infrastructure -LINFRA) consists of COTS hardware and infrastructural software (for example: server monitoring software, host operating system, virtualization software, device firmware), providing a specially tailored Infrastructure as a Service (IaaS) and Platform as a Service (PaaS) solution. The TM infrastructure provides services in the form of computational power, software defined networking, power, storage abstractions, and high level, state of the art IaaS and PaaS management interfaces. This cyber platform will be tailored to each of the two SKA Phase 1 telescopes (SKA_MID in South Africa and SKA_LOW in Australia) instances, each presenting different computational and storage infrastructures and conditioned by location. This cyber platform will provide a compute model enabling TM to manage the deployment and execution of its multiple components (observation scheduler, proposal submission tools, M&C components, Forensic tools and several Databases, etc). In this sense, the TM LINFRA is primarily focused towards the provision of isolated instances, mostly resorting to virtualization technologies, while defaulting to bare hardware if specifically required due to performance, security, availability, or other requirement.

Trends in Architecture and Middleware of Radio Telescope Control System

“…In addition, the soft bus provided by Tango needs to be recompiled when a new device is added, CORBA is used to send control commands, and ZeroMQ sends the status information of the hardware device to the user interface [75]. Tango provides the basis for the realization of radio telescope control systems, such as GMRT monitoring and control system [76] and SKA monitoring and control system [77]. GMRT monitoring and control system is based on the Sensor Actuator and Control Element (SACE) model and developed by Tango [78].…”

A sketch for the KS test for Big Data

“…Mesmo tarefas primárias como a detecção de mudanças na distribuição dos dados, em amostras incrementalmente estabelecidas, se torna um grande desao por conta do descarte de informações relevantes [Hu et al 2020;Kifer et al 2004]. Por exemplo, ao analisar o intervalo de chegada de pacotes em uma rede de alta velocidade [Clay et al 1993], ou o intervalo entre sinais de um certo tipo emitidos quando um meteoro passa por um telescópio [Barbosa et al 2016], queremos identicar períodos em que a distribuição desse intervalo é igual, sendo assim preciso armazenar quantidades gigantescas de informação. Em muitas aplicações é impossível guardar tanta informação, pois o volume de dados é algumas ordens de magnitude maior que a memória disponível.…”