LinuxGuruz
Toll Free Numbers
  • Last 5 Forum Topics
    Replies
    Views
    Last post


The Web Only This Site
  • BOOKMARK

  • ADD TO FAVORITES

  • REFERENCES


  • MARC

    Mailing list ARChives
    - Search by -
     Subjects
     Authors
     Bodies





    FOLDOC

    Computing Dictionary




  • Text Link Ads
  • LINUX man pages
  • Linux Man Page Viewer


    The following form allows you to view linux man pages.

    Command:

    fs_checkservers

    
    
    

    SYNOPSIS

           fs checkservers [-cell <cell to check>] [-all] [-fast]
               [-interval <seconds between probes>] [-help]
    
           fs checks [-c <cell to check>] [-a] [-f]
               [-i <seconds between probes>] [-h]
    
    
    

    DESCRIPTION

           The fs checkservers command reports whether certain AFS server machines
           are accessible from the local client machine. The machines belong to
           one of two classes, and the Cache Manager maintains a list of them in
           kernel memory:
    
           ?   The database server machines for every cell listed in the local
               /etc/openafs/CellServDB file, plus any machines added to the memory
               list by the fs newcell command since the last reboot.
    
           ?   All file server machines the Cache Manager has recently contacted,
               and which it probably needs to contact again soon. In most cases,
               the Cache Manager holds a callback on a file or volume fetched from
               the machine.
    
           If the Cache Manager is unable to contact the vlserver process on a
           database server machine or the fileserver process on a file server
           machine, it marks the machine as inaccessible. (Actually, if a file
           server machine is multihomed, the Cache Manager attempts to contact all
           of the machine's interfaces, and only marks the machine as down if the
           fileserver fails to reply via any of them.) The Cache Manager then
           periodically (by default, every three minutes) sends a probe to each
           marked machine, to see if it is still inaccessible. If a previously
           inaccessible machine responds, the Cache Manager marks it as accessible
           and no longer sends the periodic probes to it.
    
           The fs checkservers command updates the list of inaccessible machines
           by having the Cache Manager probe a specified set of them:
    
           ?   By default, only machines that are marked inaccessible and belong
               to the local cell (the cell listed in the local
               /etc/openafs/ThisCell file).
    
           ?   If the -cell argument is included, only machines that are marked
               inaccessible and belong to the specified cell.
    
           ?   If the -all flag is included, all machines marked inaccessible.
    
           If the -fast flag is included, the Cache Manager does not probe any
           machines, but instead reports the results of the most recent previous
           probe.
    
           To set the interval between probes rather than produce a list of
           inaccessible machines, use the -interval argument. The non-default
           setting persists until the machine reboots; to preserve it across
           output does not necessarily mean that it is functioning, because it
           possibly is not included in the memory list at all (if, for example,
           the Cache Manager has not contacted it recently). For the same reason,
           the output is likely to vary on different client machines.
    
           Unlike most fs commands, the fs checkservers command does not refer to
           the AFSCELL environment variable.
    
    
    

    OPTIONS

           -cell <cell to check>
               Names each cell in which to probe server machines marked as
               inaccessible. Provide the fully qualified domain name, or a
               shortened form that disambiguates it from the other cells listed in
               the local /etc/openafs/CellServDB file. Combine this argument with
               the -fast flag if desired, but not with the -all flag. Omit both
               this argument and the -all flag to probe machines in the local cell
               only.
    
           -all
               Probes all machines in the Cache Manager's memory list that are
               marked inaccessible. Combine this argument with the -fast flag if
               desired, but not with the -cell argument. Omit both this flag and
               the -cell argument to probe machines in the local cell only.
    
           -fast
               Displays the Cache Manager's current list of machines that are
               inaccessible, rather than sending new probes. The output can as old
               as the current setting of the probe interval (by default three
               minutes, and maximum ten minutes).
    
           -interval <seconds between probes>
               Sets or reports the number of seconds between the Cache Manager's
               probes to machines in the memory list that are marked inaccessible:
    
               ?   To set the interval, specify a value from the range between 1
                   and 600 (10 minutes); the default is 180 (three minutes). The
                   issuer must be logged in as the local superuser "root". The
                   altered setting persists until again changed with this command,
                   or until the machine reboots, at which time the setting returns
                   to the default.
    
               ?   Provide a value of 0 (zero) to display the current interval
                   setting. No privilege is required. Do not combine this argument
                   with any other.
    
           -help
               Prints the online help for this command. All other valid options
               are ignored.
    
    
    

    OUTPUT

           If there are no machines marked as inaccessible, or if all of them now
           respond to the Cache Manager's probe, the output is:
           each hostname (uppercase or lowercase letters, or an Internet address
           in dotted decimal format) depends on how the local cell's name service
           translates it at the time the command is issued. If a server machine is
           multihomed, the output lists only one of its interfaces (usually, the
           currently most preferred one).
    
           If the -interval argument is provided with a value between 1 and 600,
           there is no output. If the value is 0, the output reports the probe
           interval as follows:
    
              The current down server probe interval is <interval> secs
    
    
    

    EXAMPLES

           The following command displays the Cache Manager's current list of
           unresponsive machines in the local cell, rather than probing them
           again. The output indicates that if there were any machines marked
           inaccessible, they all responded to the previous probe.
    
              % fs checkservers -fast
              All servers are running.
    
           The following example probes machines in the Cache Manager's memory
           list that belong to the "stateu.edu" cell:
    
              % fs checkservers -cell stateu.edu
              All servers are running.
    
           The following example probes all server machines in the Cache Manager's
           memory list. It reports that two machines did not respond to the probe.
    
              % fs checkservers -all
              These servers unavailable due to network or server problems:
              fs1.abc.com SV3.STATE.EDU.
    
    
    

    PRIVILEGE REQUIRED

           To set the probe interval, the issuer must be logged in as the local
           superuser "root". Otherwise, no privilege is required.
    
    
    

    SEE ALSO

           CellServDB(5), ThisCell(5), fs_newcell(1)
    
    
    

    COPYRIGHT

           IBM Corporation 2000. <http://www.ibm.com/> All Rights Reserved.
    
           This documentation is covered by the IBM Public License Version 1.0.
           It was converted from HTML to POD by software written by Chas Williams
           and Russ Allbery, based on work by Alf Wachsmann and Elizabeth Cassell.
    
    
    

    OpenAFS 2012-03-26 FS_CHECKSERVERS(1)

    
    
  • MORE RESOURCE


  • Linux

    The Distributions





    Linux

    The Software





    Linux

    The News



  • MARKETING






  • Toll Free

Toll Free Numbers

webmaster@linuxguruz.com
Copyright © 1999 - 2016 by LinuxGuruz