Hi Dave,
Thank you for your patience and explanations.
When I filtered out the sda device on the lvm configuration file it
works fine. I will test it again with the latest version of lvm and
compare which patches have been added.
I learned a lot from our discussions and thank you again for your help.
Regards
Zhiyong
On 4/14/23 4:28 AM, David Teigland wrote:
On Wed, Apr 12, 2023 at 05:16:41PM +0800, Zhiyong Ye wrote:
configure mpath on sda alone on the current stock of machines. And I tested
this in my environment using lvchange --refresh, but it doesn't switch the
active LV to use mpatha.
It seems to work for me with the latest version of lvm, which may be due
to improved multipath component detection and/or improved handling of
duplicate PVs. So the current upstream code might work for you also.
# pvs
PV VG Fmt Attr PSize PFree
/dev/sdf ff lvm2 a-- <931.01g <930.76g
# lvs -o+devices
LV VG Attr LSize Origin Devices
lvol1 ff -wi-ao---- 256.00m /dev/sdf(1)
# mount | grep ff
/dev/mapper/ff-lvol1 on /mnt type xfs (rw,relatime,seclabel,attr2,inode64,logbufs=8,logbsize=32k,noquota)
# multipath -a /dev/sdf
wwid '3690b11c0000438ad0000057150910423' added
# multipath -l
mpatha (3690b11c0000438ad0000057150910423) dm-4 DELL,MD32xxi
size=931G features='2 pg_init_retries 50' hwhandler='1 rdac' wp=rw
`-+- policy='service-time 0' prio=0 status=active
`- 7:0:0:4 sdf 8:80 active undef running
# pvs
WARNING: Device mismatch detected for ff/lvol1 which is accessing /dev/sdf instead of /dev/mapper/mpatha.
PV VG Fmt Attr PSize PFree
/dev/mapper/mpatha ff lvm2 a-- <931.01g <930.76g
# lvs ff
WARNING: Device mismatch detected for ff/lvol1 which is accessing /dev/sdf instead of /dev/mapper/mpatha.
LV VG Attr LSize
lvol1 ff -wi-ao---- 256.00m
# dmsetup table ff-lvol1
0 524288 linear 8:80 10240
# lvchange --refresh ff/lvol1
# dmsetup table ff-lvol1
0 524288 linear 253:4 10240
# pvs
PV VG Fmt Attr PSize PFree
/dev/mapper/mpatha ff lvm2 a-- <931.01g <930.76g
# lvs -o+devices ff
LV VG Attr LSize Devices
lvol1 ff -wi-ao---- 256.00m /dev/mapper/mpatha(1)
Dave
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