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 SAMSorted descending Service abbreviation in SAM
OSG-SRMv2 OSG SRM version 2 OSGSRMv2
OSG-SRMv1 OSG SRM version 1 OSGSRMv1
OSG-CE OSG Computing Element OSGCE
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 and OSG critical tests

Computing Element (CE):
  • CE-sft-caver is equivalent to org.osg.certificates.cacert-expiry
  • CE-sft-csh is equivalent to org.osg.general.osg-directories-CE-permissions
  • CE-sft-lcg-rm is equivalent to ?
  • CE-sft-job is equivalent to ?
  • CE-sft-softver is equivalent to org.osg.general.osg-version.txt
  • CE-host-cert-valid This one does not apply for OSG (no way to check)
  • CE-sft-brokerinfo This one does not apply for OSG (no broker)
  • This is not available in EGEE; in OSG
  • This is not available in EGEE; in OSG org.osg.globus.gram-authentication

SRM version 2 (SRMv2):

Site BDII (sBDII):

  • The following EGEE metrics do not apply to the OSG since the OSG only uses a global BDII: sBDII-sanity, sBDII-performance
    • A future release of RSV will include Global BDII tests.

Current Critical Tests for OSG resources defined in SAM

Critical Tests for OSG-CE service

  • org.osg.globus.gram-authentication
    • org.osg.globus.gram-authentication: Checks if we can authenticate to remote site with available proxy. Also checks for expiring-soon proxy (and obviously expired proxy!)
  • org.osg.general.osg-version
  • org.osg.certificates.cacert-expiry
  • org.osg.general.osg-directories-CE-permissions
  • To be added on a date not confirmed yet: org.osg.batch.jobmanager-default-status.txt

Critical Tests for OSG-SRMv1/SRMv2/BestmanXrootd

  • org.osg.srm.srmping
  • org.osg.srm.srmcp-readwrite
    • org.osg.srm.srmcp-readwrite: Checks if srmcp can perform a data transfer to and from a strorage element using the srm protocol. A test file is srmcp'd to remote host, and back. Then the files are checked for consistency.

Critical Tests for OSG-GridFtp

  • org.osg.globus.gridftp-simple
    • org.osg.globus.gridftp-simple: Checks if GridFTP works to and from remote host. A test file (which can be specified using argument shown below) is gridftp'ed to remote host, and back. Then the files are checked for consistency.

-- DavidCollados - 03 Dec 2007

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Topic revision: r16 - 2009-03-10 - DavidCollados
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