The SAND project coordinates network monitoring and diagnostics from over a hundred application-level measurement points and aggregates them into a measurement archive. This curated measurement archive provides access to historical and quasi-real-time network performance data, allowing for higher-level diagnastics and analyses.
SAND supports and collaborates with long-running activities such as the OSG-Networking area and the WLCG Throughput working group. The data collected by each of these projects goes into the SAND Network Monitoring Archive (SAND-NMA).
SAND maintains a map of CC* sites running perfSONAR; to allow your site to show up, follow these directions.
SAND’s archives record historical single-stream TCP throughout across many links
SAND Network Monitoring Archive
The SAND-NMA aims to aggregate as much network monitoring tests results as feasible, providing a knowledgebase for debugging networks and performing data analytics. This archive consists of a data collector (polling measurement endpoints), a message bus (which endpoints can also push data into directly), an archive, and a visualization platform, as pictured here:
Currently, we are recording network measurements from perfSONAR and HTCondor file transfer; we plan to extend this to XRootD services during 2020.
A few metrics about our service:
- SAND users: SAND is utilized by US ATLAS and US CMS to help debug their network performance.
- Number of unique data sources: 274
- Number of HTCondor submit hosts reporting network measurements: 23
- Number of distinct measurements in the ElasticSearch database: over 2.3 billion
SAND has a weekly meeting for collaborators and project members:
|When||Monday, 3:00–4:00 p.m. Central Time|
|Phone||+1 646 876 9923,or +1 669 900 6833, Meeting ID: 344 520 180|
Additionally, we can be reached via our public Google Group.