[LU-17008] improve man and help of lfs-stripe command about overstripe

• Type: Improvement
• Resolution: Unresolved
• Priority: Minor
• Severity: 3
• Assignee: WC Triage
• Reporter: Shuichi Ihara

Description

'lfs stripe -o 0-3,0-3 <DIR>' allowed  today and it enables overstriping across OST0-3 automatically.

# mkdir out
# lfs getstripe out  out
stripe_count:  1 stripe_size:   1048576 pattern:       0 stripe_offset: -1

# lfs setstripe -o 0-3,0-3 out  [root@ec01 exafs]# lfs getstripe out  out
stripe_count:  8 stripe_size:   1048576 pattern:       raid0,overstriped stripe_offset: 0

this is a useful option, but, command help didn't mention about that.

 ost_indices:  List of OST indices, can be repeated multiple times
              Indices be specified in a format of:
                -o <ost_1>,<ost_i>-<ost_j>,<ost_n>
              Or:
                -o <ost_1> -o <ost_i>-<ost_j> -o <ost_n>
              If --pool is set with --ost then the OSTs
              must be the members of the pool.

it would be better to add about overstriping and an example.