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Diffstat (limited to 'doc/example.conf.in')
| -rw-r--r-- | doc/example.conf.in | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/doc/example.conf.in b/doc/example.conf.in index a7219846..7fe8d596 100644 --- a/doc/example.conf.in +++ b/doc/example.conf.in @@ -474,6 +474,26 @@ activation { # "auto" - Use default value chosen by kernel. readahead = "auto" + # 'mirror_segtype_default' defines which segtype will be used when the + # shorthand '-m' option is used for mirroring. The possible options are: + # + # "mirror" - The original RAID1 implementation provided by LVM2/DM. It is + # characterized by a flexible log solution (core, disk, mirrored) + # and by the necessity to block I/O while reconfiguring in the + # event of a failure. Snapshots of this type of RAID1 can be + # problematic. + # + # "raid1" - This implementation leverages MD's RAID1 personality through + # device-mapper. It is characterized by a lack of log options. + # (A log is always allocated for every device and they are placed + # on the same device as the image - no separate devices are + # required.) This mirror implementation does not require I/O + # to be blocked in the kernel in the event of a failure. + # + # Specify the '--type <mirror|raid1>' option to override this default + # setting. + mirror_segtype_default = "mirror" + # 'mirror_image_fault_policy' and 'mirror_log_fault_policy' define # how a device failure affecting a mirror is handled. # A mirror is composed of mirror images (copies) and a log. |