Review of the OSG Critical Probes used for Availability Metrics Calculations

OSG Services

The only authoritative source of information for SAM in terms of OSG services for OPS vo is the OSG interoperability monitoring list, which is accessible through this URL:

This means that SAM will ONLY monitor those services under OPS credentials.

At present time, the service names that SAM expects to find in that URL are the ones listed in the first column of this table:

Service name in OSG URL Service name in SAM Service abbreviation in SAM
OSG-CE OSG Computing Element OSGCE
OSG-SRMv1 OSG SRM version 1 OSGSRMv1
OSG-SRMv2 OSG SRM version 2 OSGSRMv2
OSG-BestmanXrootd OSG BestmanXrootd OSGBestm

List of OSG probes

The OSG probes available in the RSV (Resource & Service Validation) project are listed here:

Equivalence between EGEE/WLCG critical probes and OSG probes

Computing Element (CE):
  • CE-sft-brokerinfo This one does not apply for OSG (no broker)
  • CE-sft-caver is equivalent to cacert-crl-expiry-probe
  • CE-sft-csh is equivalent to ==
  • CE-sft-job is included in ==
  • CE-sft-lcg-rm is equivalent to ==
  • CE-sft-softver is equivalent to osg-version-probe
  • CE-host-cert-valid is equivalent to certificate-expiry-local-probe

Storage Element (SE):

  • These do not apply to OSG as they only have SRMs
  • SE-lcg-cr
  • SE-lcg-cp
  • SE-lcg-del


  • Equivalent probe covering SRM are in testing and expected to be release with OSG 1.0.0 in May.
  • SRM-put may be equivalent to srmcp-srm-probe
  • SRM-get may be equivalent to srmcp-srm-probe
  • SRM-advisory-delete may be equivalent to srmcp-srm-probe

Site BDII (sBDII):

  • Does not apply as OSG only uses a global BDII. A future release of RSV will include Global BDII tests.
  • sBDII-sanity
  • sBDII-performance

OSG Critical Probes defined in SAM for OSG-CE resources

At present time, this is the list of critical probes defined for OSG-CE resources in SAM for 'OPS' VO:
  • CRL expiry probe
    • cacert-crl-expiry-probe: Checks for expired and expiring-soon CAcerts/CRLs on remote host. Stages worker script defined in OSG_RSV_Probe_Base (or as provided using commandline argument) to remote host; and then checks the *.0 or .r0 files in $OSG_LOCATION/globus/share/certificates/ depending on -m value.
  • OSG version probe
  • OSG directories probe
    • osg-directories-probe: Checks if permissions are set correctly on important user-accesible OSG directories defined by various common OSG environment variables.
  • GridFTP simple probe
    • gridftp-simple-probe: Checks if GridFTP works to and from remote host. A test file is gridftp'ed to remote host, and back. Then the files are checked for consistency.

Proposed Critical Probes for OSG-CE

Proposed Critical Probes for OSG-GridFtp

Proposed Critical Probes for OSG-SRMv1 and OSG-SRMv2

Coming-soon List of Critical Probes for OSG Resources

for OSG-CE:

for OSG-GridFtp:

for OSG-SRMv1 and SRMv2:

-- DavidCollados - 03 Dec 2007

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Topic revision: r12 - 2008-06-19 - DavidCollados
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