what is quorom in aix ?
During my AIX learning day i always wondered about what is quorom and how it affect volume group on AIX ? But after doing google i found answer like below.
Here is the answer :
Number of disk must be present in volume group to successfully vary on volume group in AIX.
"51% is mandatory vgda."
for example, XYZ volume group having 6 disk so mandatory disk for 51% VGDA is 4.
if disk in volume group is 10 then mandatory disk for 51% VGDA is 6.
Its simple
51% VGDA=Number of disk in Volume group/2 +1
so what happen if that mandatory percentage (51%) not available ?
rootvg quorom always kept disabled.
QUORUM: 1 (Disabled)
Reason behind this is when AIX OS boot and at the time of boot if rootvg having 2 disk and 1 disk from rootvg crashed then OS will never came up,because it not satisfies 51% VGDA rule.so its always good idea to keep mirrored rootvg quorom disabled.
will update new idea and thought on AIX
Thanks !!
During my AIX learning day i always wondered about what is quorom and how it affect volume group on AIX ? But after doing google i found answer like below.
Here is the answer :
Number of disk must be present in volume group to successfully vary on volume group in AIX.
"51% is mandatory vgda."
for example, XYZ volume group having 6 disk so mandatory disk for 51% VGDA is 4.
if disk in volume group is 10 then mandatory disk for 51% VGDA is 6.
Its simple
51% VGDA=Number of disk in Volume group/2 +1
so what happen if that mandatory percentage (51%) not available ?
rootvg quorom always kept disabled.
QUORUM: 1 (Disabled)
Reason behind this is when AIX OS boot and at the time of boot if rootvg having 2 disk and 1 disk from rootvg crashed then OS will never came up,because it not satisfies 51% VGDA rule.so its always good idea to keep mirrored rootvg quorom disabled.
will update new idea and thought on AIX
Thanks !!
No comments:
Post a Comment