NAME

       writeboosttab - mappings of cache(d) devices

SYNOPSIS

       /etc/writeboosttab

DESCRIPTION

       The  file  writeboosttab  contains  information  about mappings between caching and cached
       block devices for writeboost utility.

       Each mapping is described on a separate line; Empty lines and lines starting with '#'  are
       ignored; Fields on each line are separated by tabs or spaces;

       The first field (dm_name)
              This field describes the name of device-mapepr block device that will be created as
              result of mapping.

              Typically after successful mapping the  dm_name  will  appear  in  the  /dev/mapper
              folder.

       The second field (hdd_device)
              This field describes path to the cached block device, typically "slow" (rotational)
              HDD.

       The third field (ssd_device).
              This field describes path to the caching block device, typically "fast" SSD.

       The forth field (options)
              This optional field  describes  comma-separated  list  of  options  passed  to  dm-
              writeboost.

       It  is recommended to use reliable paths to block devices like /dev/disk/by-uuid/{UUID} or
       similar.

EXAMPLES

       The following is an example of an entry in the /etc/writeboosttab file:

            cached_hdd  /dev/disk/by-uuid/2e8260bc-024c-4252-a695-a73898c974c7  /dev/disk/by-partuuid/43372b68-3407-45fa-9b2f-61afe9c26a68  writeback_threshold=70,sync_data_interval=3600

FILES

       /etc/writeboosttab

SEE ALSO

       writeboost(8)

AUTHOR

        Dmitry Smirnov <onlyjob@member.fsf.org>

COPYRIGHT

        Copyright 2015-2017 Libre Solutions Pty Ltd (http://raid6.com.au)

LICENSE

        This program 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, either version 2 of the License, or
        (at your option) any later version.

        This package 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 this program. If not, see <http://www.gnu.org/licenses/>.