The vacuum platform

McNab, A.

doi:10.1088/1742-6596/898/5/052028

Cited by 3 publications

(3 citation statements)

References 12 publications

(11 reference statements)

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“…IaaC (Infrastructure as a Client) models must also be supported. This is realised in Dirac by a generic pilot model [262], where a plugin mechanism enables easy adaptation on a wide range of computing resources [263][264][265], including cloud resources, high performance computing (HPC) centres and the servers of the LHCb online farm.…”

Section: Distributed Computingmentioning

confidence: 99%

The LHCb Upgrade I

Aaij,

Abdelmotteleb,

Abellan Beteta

et al. 2024

J. Inst.

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The LHCb upgrade represents a major change of the experiment. The detectors have been almost completely renewed to allow running at an instantaneous luminosity five times larger than that of the previous running periods. Readout of all detectors into an all-software trigger is central to the new design, facilitating the reconstruction of events at the maximum LHC interaction rate, and their selection in real time. The experiment's tracking system has been completely upgraded with a new pixel vertex detector, a silicon tracker upstream of the dipole magnet and three scintillating fibre tracking stations downstream of the magnet. The whole photon detection system of the RICH detectors has been renewed and the readout electronics of the calorimeter and muon systems have been fully overhauled. The first stage of the all-software trigger is implemented on a GPU farm. The output of the trigger provides a combination of totally reconstructed physics objects, such as tracks and vertices, ready for final analysis, and of entire events which need further offline reprocessing. This scheme required a complete revision of the computing model and rewriting of the experiment's software.

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Section: Distributed Computingmentioning

confidence: 99%

The LHCb Upgrade I

Aaij,

Abdelmotteleb,

Abellan Beteta

et al. 2024

J. Inst.

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“…The format of the VacQuery messages has previously been specified in an HEP Software Foundation Technical Note [6] and discussed in a previous CHEP paper [7]. The messages are JSON documents sent in UDP packets to the vacmond server listening on port 8884.…”

Section: Vacquery Messagesmentioning

confidence: 99%

Monitoring virtual machines and containers with VacMon

McNab

2019

EPJ Web Conf.

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At the start of 2017, GridPP deployed VacMon, a new monitoring system suitable for recording and visualising the usage of virtual machines and containers at multiple sites. The system uses short JSON messages transmitted by logical machine lifecycle managers such as Vac and Vcycle. These are directed to a VacMon logging service which records the messages in an Elasticsearch database. The records can be viewed graphically using the VacMon web portal, with selections based on time ranges, virtual organisations, sites, subclusters within sites, or individual hypervisors.

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“…In a previous CHEP paper [5] and HSF technical note [6] we presented the Vacuum Platform specification, which Vac, and its cloud-based sibling Vcycle [7], follow. This platform defines the interfaces between virtual machines and the Vac or Vcycle systems which manage them.…”

Section: Vacuum Containersmentioning

confidence: 99%

Container support in Vac

McNab

2019

EPJ Web Conf.

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During 2017 support for Docker and Singularity containers was added to the Vac system, in addition to its long standing support for virtual machines. All three types of "logical machine" can now be run in parallel on the same pool of hypervisors, using container or virtual machine definitions published by experiments. We explain how CernVM-FS is provided to containers by the hypervisors, to avoid any need to operate the containers in privileged modes. Finally we describe how LHCb Docker containers use this model and have been used to validate the Vac implementation.

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The vacuum platform

Cited by 3 publications

References 12 publications

The LHCb Upgrade I

The LHCb Upgrade I

Monitoring virtual machines and containers with VacMon

Container support in Vac

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