no of lvm's per VG

Gil@LQ · 09-01-2012, 05:19 PM

hi,

we have 4tb hdd attached with NAS server configured on CENTOS6, main purpose of this NAS is to storage for 3ESX server, 500 GB for each, for users another 500GB as samba shares. my confiusion is ,

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do i need to create separate VG for each volume , or single / two VG'S needed, what am ithing is if one vg is failed rest of my vg's and lvm work ? isn't it, if i create all lvm's in single vg i may loose all data ?

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am i correct or wrong? please help me what should i do ? does VG get's corrupted by any chance, if so what maintaince i should take care and what are NFS monitoring tools

please lead me, thank you.

barghota · 09-01-2012, 07:32 PM

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do i need to create separate VG for each volume , or single / two VG'S needed

No, LVM manages disk drives, so it's up to you how to partition your NAS server.

1 VG 'i.e. esx-vg', and 3 LV's for each server will be a good schema.

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what am ithing is if one vg is failed rest of my vg's and lvm work ? isn't it, if i create all lvm's in single vg i may loose all data ?

You don't worry about LVM failure as much as you worry about Hard Drive failures. You have to put your VG-s on a RAID (1 or 5 or 6 or whatever) because LVM doesn't provide data protection.

Gil@LQ · 09-02-2012, 05:08 AM

hi barghota,

thanks for your reply, so 1 vg is engoug for three lvm 's each esx one lvm ? right . k 'll do it, what about samba share, shall i create 4th lvm for it in same vg or, i create 2nd vg for samba share. does 500 GB lvm , so large and effects performance or it's k?

thank you.