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

AUTHOR

Dmitry Smirnov <onlyjob@member.fsf.org>

COPYRIGHT

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/>.

2015-05-07

writeboost