VxVM relayout requires the additional space on old disks as the temporary area,
if there is no available spaces remained,how can we do ?
So I take some testing for above situation.I want to relayout a striped volume
vol3 within datadg from 3 columns to 4 columns:
# vxprint -g datadg -ht
v vol3 - ENABLED ACTIVE 104857600 SELECT vol3-01 fsgen
pl vol3-01 vol3 ENABLED ACTIVE 104857728 STRIPE 3/128 RW
sd c1t10d0-03 vol3-01 c1t10d0 104857728 34952576 0/0 c1t10d0 ENA
sd c1t11d0-03 vol3-01 c1t11d0 104857728 34952576 1/0 c1t11d0 ENA
sd c1t12d0-03 vol3-01 c1t12d0 104857728 34952576 2/0 c1t12d0 ENA
And no space left on above three disks:
# vxdg -g datadg free
DISK DEVICE TAG OFFSET LENGTH FLAGS
c1t10d0 c1t10d0s2 c1t10d0 143328768 192 -
c1t11d0 c1t11d0s2 c1t11d0 143328768 192 -
c1t12d0 c1t12d0s2 c1t12d0 143328768 192 -
So I add some physical disk into datadg,I intend to:
- use c1t13d0 as new column
- use c1t8d0 & c1t9d0 as temp. area
# vxdg -g datadg adddisk c1t8d0 c1t9d0 c1t13d0
# vxassist -g datadg relayout vol3 ncol=+1 wantalloc=c1t13d0 tmpsize=10g tmpalloc=c1t8d0,c1t9d0
Please note I use the keyword "tmpalloc" & "wantalloc",but after relayout,I noticed
the new column not assigned to c1t13d0 as I wanted:
# vxprint -g datadg -ht
v vol3 - ENABLED ACTIVE 139810816 SELECT vol3-01 fsgen
pl vol3-01 vol3 ENABLED ACTIVE 139810816 STRIPE 4/128 RW
sd c1t10d0-06 vol3-01 c1t10d0 104857728 34952576 0/0 c1t10d0 ENA
sd c1t10d0-03 vol3-01 c1t10d0 143328768 128 0/34952576 c1t10d0 ENA
sd c1t11d0-06 vol3-01 c1t11d0 104857728 34952576 1/0 c1t11d0 ENA
sd c1t11d0-03 vol3-01 c1t11d0 143328768 128 1/34952576 c1t11d0 ENA
sd c1t12d0-06 vol3-01 c1t12d0 104857728 34952576 2/0 c1t12d0 ENA
sd c1t12d0-03 vol3-01 c1t12d0 143328768 128 2/34952576 c1t12d0 ENA
sd c1t8d0-03 vol3-01 c1t8d0 20971008 34952704 3/0 c1t8d0 ENA
As above,c1t8d0 is used originally for temp. area,but why the new data
was allocated on it ?seems the vxvm keyword "tmpalloc" & "wantalloc" not took
effect ?
Thanks.
Regards,
Simon
