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mfstopology.cfg(5)          This is part of MooseFS         mfstopology.cfg(5)


NAME

       mfstopology.cfg - MooseFS network topology definitions


DESCRIPTION

       The file mfstopology.cfg contains assignments of IP addresses into
       network locations (usually switch numbers). This file is optional. If
       your network has one switch or decreasing traffic between switches is
       not necessary then leave this file empty.


SYNTAX

       Syntax is:

       ADDRESS SWITCH-NUMBER

       Lines starting with # character are ignored as comments.

       ADDRESS can be specified in several forms:

       *                   all addresses
       n.n.n.n             single IP address
       n.n.n.n/b           IP class specified by network address and bits number
       n.n.n.n/m.m.m.m     IP class specified by network address and mask
       f.f.f.f-t.t.t.t     IP range specified by from-to addresses (inclusive)

       SWITCH-NUMBER can be specified as any positive 32-bit numer.


NOTES

       If one IP belongs to more than one definition then last definition is
       used.

       As for now distance between switches is constant. So distance between
       machines is calculated as: 0 when IP numbers are the same, 1 when IP
       numbers are different, but switch numbers are the same and 2 when
       switch numbers are different

       Distances are used only to sort chunkservers during read and write
       operations.  New chunks are still created randomly. Also rebalance
       routines do not take distances into account.


COPYRIGHT

       Copyright (C) 2016 Jakub Kruszona-Zawadzki, Core Technology Sp. z o.o.

       This file is part of MooseFS.

       MooseFS is free software; you can redistribute it and/or modify it
       under the terms of the GNU General Public License as published by the
       Free Software Foundation, version 2 (only).

       MooseFS is distributed in the hope that it will be useful, but WITHOUT
       ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
       FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
       for more details.

       You should have received a copy of the GNU General Public License along
       with MooseFS; if not, write to the Free Software Foundation, Inc., 59
       Temple Place, Suite 330, Boston, MA  02111-1307  USA or visit
       http://www.gnu.org/licenses/gpl-2.0.html


SEE ALSO

       mfsmaster(8), mfsmaster.cfg(5)

MooseFS 2.0.83-1                 January 2016               mfstopology.cfg(5)

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