SAM
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SAM (Sequential Access via Metadata) is a system by and at Fermilab for providing a database that ties metadata to file locations, allows file set definition and query, and other features. See also Metadata.
SAM Web
SAM may be accessed via an HTTP API called SAM Web Services.
Some information resources about SAM Web
Sam Web Client
Access to SAM Web is made easier through the SAM Web Client client-side Python module and command line interface tool called samweb.
Installation of sam-web-client package
- On fnal.gov machines, it should be available under UPS
- To install see these instructions
Using samweb
Command line help
samweb
Locate a file's URL:
$ samweb -e lbne get-file-access-url lbne_r006837_sr01_20160112T213253.root gsiftp://fndca1.fnal.gov:2811/pnfs/fnal.gov/usr/lbne/test-data/lbne/raw/00/18/90/51/lbne_r006837_sr01_20160112T213253.root
Locate a file:
$ samweb -e lbne locate-file lbne_r006837_sr01_20160112T213253.root enstore:/pnfs/lbne/test-data/lbne/raw/00/18/90/51(602@vpe776)
Access metadata:
$ samweb -e lbne get-metadata lbne_r006837_sr01_20160112T213253.root
File Name: lbne_r006837_sr01_20160112T213253.root
File Id: 189051
Create Date: 2016-01-12T22:09:17+00:00
User: dunepro
Update Date: 2016-01-12T22:28:26+00:00
Update User: lbnepro
File Type: test-data
File Format: root
File Size: 1762859968
Checksum: enstore:1713616759
Content Status: good
Group: lbne
Data Tier: raw
Application: art daqag v00_00_01
Event Count: 280695
First Event: 1
Last Event: 280695
Start Time: 2016-01-12T21:32:16+00:00
End Time: 2016-01-12T21:55:46+00:00
lbne_data.detector_type: 35t:penn01:rce13:rce09:rce08:rce07:rce06:rce05:rce04:rce03:rce02:rce01:rce00:rce10:rce11:rce15:rce12:rce14
lbne_data.name: Test
lbne_data.run_mode: rces_and_ssps_and_ptb
Runs: 6837 (test)
