diff options
Diffstat (limited to 'man')
| -rw-r--r-- | man/lvm.conf.5.in | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/man/lvm.conf.5.in b/man/lvm.conf.5.in index 0b0accfc..66198351 100644 --- a/man/lvm.conf.5.in +++ b/man/lvm.conf.5.in @@ -181,11 +181,14 @@ ignore devices smaller than 2MB (i.e. floppy drives): pv_min_size = 2048 .IP \fBissue_discards\fP \(em -Issue discards to an LV's underlying PV(s) when the LV is removed. Discards -inform the storage that a region is no longer in use. If set to 1, discards will -only be issued if both the storage and kernel provide support. Not all storage -will support or benefit from discards but SSDs or thinly provisioned LUNs -generally do. +Issue discards to a logical volumes's underlying physical volume(s) when the +logical volume is no longer using the physical volumes' space (e.g. lvremove, +lvreduce, etc). Discards inform the storage that a region is no longer in use. +Storage that supports discards advertise the protocol specific way discards +should be issued by the kernel (TRIM, UNMAP, or WRITE SAME with UNMAP bit set). +Not all storage will support or benefit from discards but SSDs and thinly +provisioned LUNs generally do. If set to 1, discards will only be issued if +both the storage and kernel provide support. .IP .TP \fBallocation\fP \(em Space allocation policies |