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тАО02-23-2005 09:32 PM
тАО02-23-2005 09:32 PM
SG without LVM?
Kriszti├б
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тАО02-23-2005 09:38 PM
тАО02-23-2005 09:38 PM
Re: SG without LVM?
Though using LVM does give you a lot more flexibility, I'm not sure why you'd want to use flat partitions?
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тАО02-23-2005 09:45 PM
тАО02-23-2005 09:45 PM
Re: SG without LVM?
Krisztian
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тАО02-23-2005 10:59 PM
тАО02-23-2005 10:59 PM
Re: SG without LVM?
SEP
Owner of ISN Corporation
http://isnamerica.com
http://hpuxconsulting.com
Sponsor: http://hpux.ws
Twitter: http://twitter.com/hpuxlinux
Founder http://newdatacloud.com
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тАО02-28-2005 10:43 PM
тАО02-28-2005 10:43 PM
Re: SG without LVM?
If you do not configure any Volume Groups then there is nothing to configure in the package to activate volume groups.
I suppose it is possible you could just have "plain" partitions if you wish, but this is unsupported.
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тАО03-02-2005 12:49 AM
тАО03-02-2005 12:49 AM
Re: SG without LVM?
1. You can use all disk as raw device without or with FS
2. You can use part of disk (fdisk) as raw device without or with FS
1 and 2 are not support from HP but work.
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тАО03-09-2005 04:52 AM
тАО03-09-2005 04:52 AM
Re: SG without LVM?
The point is not that LVM MUST be used. The point is that the different members of a cluster MUST IN NO CASE have one filesystem mounted simultaneously by two nodes. So, mounting and unmounting a filesystem is theorically sufficient.
However, activating and de-activating a VG gives it more security and flexibility.
Regards,
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тАО03-09-2005 07:11 AM
тАО03-09-2005 07:11 AM
Re: SG without LVM?
Thanks for your replies...
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тАО03-09-2005 11:45 AM
тАО03-09-2005 11:45 AM
Re: SG without LVM?
usually the active node has the vg activated read-write, and you periodically activate it ro on the second partner.
with OCFS You can also use the shared mode, but this filesystem lacks a few features according to the sourceforge page.
You should think of volume groups as something that makes Your work a lot easier, not the other way round - with MC/SG I'd almost always favor using Volume Groups for the shared storage. (Oracle 9/10 with ASM is another topic)
I do not know if Linux' LVM2 implements physical volume groups, too - if it does and You use mirrored storage these make things even easier.
There sure is a notable overhead as long as we're talking about 1 or 2 disks, but as soon as it's a few more, using a LVM will save You a lot of time.
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тАО03-09-2005 10:53 PM
тАО03-09-2005 10:53 PM
Re: SG without LVM?
It uses the standard vgchange -a y to activate all volume groups.
A request has been submitted ( or so I understand) to who/what/where in Linux world to have this functionality added, but as of right now I do not know whether this will be added, or if so, when