Improved Pilot Logging in DIRAC Fayer, Simon; Martyniak, Janusz; Stagni, Federico
EPJ Web of Conferences,
2024, Letnik:
295
Journal Article, Conference Proceeding
Recenzirano
Odprti dostop
DIRAC is a widely used framework for distributed computing. It works by building a layer between the users and the resources offering a common interface to a number of heterogeneous providers. DIRAC, ...like many other workload management systems, uses pilot jobs to check and configure the worker-node environment before fetching a user payload. The log messages generated by these pilot jobs are crucial for diagnosing problems in the infrastructure. In these proceedings we present a configurable, resource independent remote pilot logging system.
DIRAC is the interware for building and operating large scale distributed computing systems. It is adopted by multiple collaborations from various scientific domains for implementing their computing ...models. DIRAC provides a framework and a rich set of ready-to-use services for Workload, Data and Production Management tasks of small, medium and large scientific communities having different computing requirements. The base functionality can be easily extended by custom components supporting community specific workflows. DIRAC is at the same time an aging project, and a new DiracX project is taking shape for replacing DIRAC in the long term. This contribution will highlight DIRAC’s current, upcoming and planned capabilities and technologies, and how the transition to DiracX will take place. Examples include, but are not limited to, adoption of security tokens and interactions with Identity Provider services, integration of Clouds and High Performance Computers, interface with Rucio, improved monitoring and deployment procedures.
Data management for the SoLid experiment Abreu, Yamiel; Bauer, Daniela; Fayer, Simon ...
EPJ Web of Conferences,
2019, Letnik:
214
Journal Article, Conference Proceeding
Recenzirano
Odprti dostop
The SoLid experiment is a short-baseline neutrino project located at the BR2 research reactor in Mol, Belgium. It started data taking in November 2017. Data management, including long term storage ...will be handled in
close collaboration by Vrije Universiteit Brussels, Imperial College London and Rutherford Appleton Laboratory. We describe the SoLid data management model with an emphasis on the software developed for the file distribution on the Grid, the data archiving and the initial data transfer from the experiment to a Grid storage element. We present results from the first six months of data taking, showing how the system performed in a production setting.
We present the prototype of an open source data transfer tool kit. It provides an easy to use ‘drag-and-drop’ web interface for users to transfer files between institutions that do not have a grid ...infrastructure in place. The underlying technology leverages standard grid technologies. e.g. automatic generation of X.509 certificates, but remains completely hidden from the user.
It is commonly observed that production Grids are inherently unreliable. The aim of this work is to improve Grid application performances by tuning the job submission system. A stochastic model, ...capturing the behavior of a complex Grid workload management system is proposed. To instantiate the model, detailed statistics are extracted from dense Grid activity traces. The model is exploited for optimizing a simple job resubmission strategy. It provides quantitative inputs to improve job submission performance and it enables the impact of faults and outliers on Grid operations to be quantified.
The over-arching aim of Grid computing is to move computational resources from individual institutions where they can only be used for in-house work, to a more open vision of vast online ubiquitous ...`virtual computational' resources which support individuals and collaborative projects. A major step towards realizing this vision is the provision of instrumentation – such as telescopes, accelerators or electrical power stations – as Grid resources, and the tools to manage these resources online. The GRIDCC project attempts to satisfy these requirements by providing the following four co-dependent components; a flexible wrapper for publishing instruments as Grid resources; workflow support for the orchestration of multiple Grid resources in a timely manner; the machinery to make reservation agreements on Grid resources; and the facility to satisfy quality of service (QoS) requirements on elements within workflows. In this paper we detail the set of services developed as part of the GRIDCC project to provide the last three of these components. We provide a detailed architecture for these services along with experimental results from load testing experiments. These services are currently deployed as a test-bed at a number of institutions across Europe, and are poised to provide a 'virtual lab' to production level applications.
Background: The attitudes of schizophrenic patients toward medications directly impact the treatment compliance. Although
noncompliance represents a serious concern in long-term schizophrenia ...treatment, a detailed information on the factors that impair
compliance is still limited. The present study aims to assess the factors related to noncompliance with antipsychotics agents, in longterm
treated chronic paranoid schizophrenia patients.
Subjects and methods: Two groups of such patients (total number n=162) were analyzed and compared: 1). patients with
symptomatic remission on haloperidol (n=32), clozapine (n=40) or olanzapine (n=45), and 2). drug resistant patients (n=45). The
mean duration of the disease was 19.3 years.
Results: Altogether, in our patient sample, a better drug attitude was found in the olanzapine and clozapine groups. Our findings
have also revealed that worse attitude toward antipsychotics correlated with an earlier onset of schizophrenia, younger patient age,
shorter duration of the disease, higher burden of symptoms, treatment with a typical antipsychotics, and higher severity of akathisia.
Conclusion: Our results suggest that detecting factors that influence the patient’s attitude toward medications might be helpful
for designing targeted educational strategies in chronic schizophrenia patients (particularly those with the high risk of
noncompliance), and further trials are warranted to explore this topic.
PDF
