From: FNALD0::JGUIDA
Subject: POLICY FOR USING THE D0 ONLINE CLUSTER
Date: 31-MAR-1995 13:28:12
Expires: 15-APR-1995 13:28:12


                        D0 ONLINE CLUSTER POLICY

        I've heard from some people lately that they are not sure which
    of the online nodes are available for people doing online development
    or data/detector monitoring.  So I will repeat our policy here for everyone.

    Nodes used for data taking - NOT available for users:
        D0HSA, D0HSB, D0HSC, D0HS11   - never log into these nodes
        D0HS09 - used for TAKERS, TRGMON, L2 VCS
                 and online monitoring by experts
        D0HS10 - used for HV and L2 verification jobs
        D0HS12, D0HS13, D0HS16, D0HS17, D0HS18, D0HS19, D0HS01
               - used for shift examines
        D0HS14 - used for detector shift monitoring purposes


        D0HS06, D0HS08    - used by shifters, TAKERS, TRGMON,
         (model 38's)       L2 VCS, LOGBOOK, etc.
                          - non-shifters may use these nodes for non-cpu
                            intensive work

        D0HS07 (model 38) - not used for shift duties
        D0HS15 (model 90) - not used for shift duties
                          - L2 verification batch jobs
                          - DBL3 backups
        D0HS20 (alpha)    - used for online development work


    So, people doing online development work or detector monitoring should
    use D0HS07 and D0HS15 (or D0HS20 for alpha development work).  They can
    also use D0HS06 and D0HS08 as long as only one or two people are using
    these nodes at a time, and all are doing non-CPU intensive work.

        We STRONGLY DISCOURAGE people running jobs on FNALD0 (or any other
    cluster), using data on the D0 disks.  We will kill any such jobs found
    impacting data taking.
        Network file copies should always be done through the node that the
    disk, containing the file of interest, is locally mounted, NOT using the
    generic D0::.  D0:: should NEVER be used for anything, except possibly
    sending mail.

                                        Jan Guida