Mike Snitzer b123a82d73 Change default alignment of pe_start to 1MB. ... The new standard in the storage industry is to default alignment of data areas to 1MB. fdisk, parted, and mdadm have all been updated to this default. Update LVM to align the PV's data area start (pe_start) to 1MB. This provides a more useful default than the previous default of 64K (which generally ended up being a 192K pe_start once the first metadata area was created). Before this patch: # pvs -o name,vg_mda_size,pe_start PV VMdaSize 1st PE /dev/sdd 188.00k 192.00k After this patch: # pvs -o name,vg_mda_size,pe_start PV VMdaSize 1st PE /dev/sdd 1020.00k 1.00m The heuristic for setting the default alignment for LVM data areas is: - If the default value (1MB) is a multiple of the detected alignment then just use the default. - Otherwise, use the detected value. In practice this means we'll almost always use 1MB -- that is unless: - the alignment was explicitly specified with --dataalignment - or MD's full stripe width, or the {minimum,optimal}_io_size exceeds 1MB - or the specified/detected value is not a power-of-2		2010-08-12 04:11:48 +00:00
..
activate	Never scan internal LVM devices.	2010-08-09 14:05:16 +00:00
cache	Use __attribute__ consistently throughout.	2010-07-09 15:34:40 +00:00
commands	Recognise and give preference to md device partitions (blkext major).	2010-08-11 12:14:23 +00:00
config	Change default alignment of pe_start to 1MB.	2010-08-12 04:11:48 +00:00
datastruct	Remove unnecessary / duplicate dm_list macros and functions.	2009-11-25 20:44:07 +00:00
device	Recognise and give preference to md device partitions (blkext major).	2010-08-11 12:14:23 +00:00
display	Use __attribute__ consistently throughout.	2010-07-09 15:34:40 +00:00
error	Use __attribute__ consistently throughout.	2010-07-09 15:34:40 +00:00
filters	Recognise and give preference to md device partitions (blkext major).	2010-08-11 12:14:23 +00:00
format1	Use __attribute__ consistently throughout.	2010-07-09 15:34:40 +00:00
format_pool	Use __attribute__ consistently throughout.	2010-07-09 15:34:40 +00:00
format_text	Avoid changing aligned pe_start as a side-effect of very verbose logging.	2010-08-03 18:19:42 +00:00
freeseg	Fix reporting of LV fields alongside unallocated PV segments.	2008-06-25 16:52:27 +00:00
label	Use __attribute__ consistently throughout.	2010-07-09 15:34:40 +00:00
locking	Use void parameter for function definition.	2010-08-03 13:06:35 +00:00
log	Various cleanups following recent commits.	2010-06-21 15:56:57 +00:00
metadata	Change default alignment of pe_start to 1MB.	2010-08-12 04:11:48 +00:00
mirror	Reduce severity of the "mirror transient status" log message (this was never	2010-08-04 15:55:03 +00:00
misc	Recognise and give preference to md device partitions (blkext major).	2010-08-11 12:14:23 +00:00
mm	Fix format string from patch apply mistake	2010-07-08 14:47:46 +00:00
replicator	Use __attribute__ consistently throughout.	2010-07-09 15:34:40 +00:00
report	Clarify help text for vg_mda_count.	2010-07-21 19:44:25 +00:00
snapshot	Use __attribute__ consistently throughout.	2010-07-09 15:34:40 +00:00
striped	Use __attribute__ consistently throughout.	2010-07-09 15:34:40 +00:00
unknown	Use __attribute__ consistently throughout.	2010-07-09 15:34:40 +00:00
uuid	Use log_error macro consistently throughout in place of log_err.	2009-07-15 20:02:46 +00:00
zero	Use __attribute__ consistently throughout.	2010-07-09 15:34:40 +00:00
Makefile.in	Replicator: base lvm2 support	2010-05-21 12:36:30 +00:00