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тАО12-08-2009 07:54 AM
тАО12-08-2009 07:54 AM
We're trying to administrate Linux Environments in the same (or close as possible) fashion as our UNIX environments. In the area of OS Backups - Is there such a thing like DRD that is uber-useful on HP-UX 11.31 environments? Or anything close to DRD that will allow us to have a fallback OS at least in case the main one fails due to human error or bad patching, etc...?
We're also thinking of having a backup vg00 (yeah .. we use LVM on our OS disks and patterned it after our HP-UX ecosystems). Perhaps carving out another disk with say vgbak and regularly doing dd-copies of the OS partitions. Then in a fall back .. just boot off the other disk with possibly a routine to update grub... what do you think?
MondoRescue and others are kool but..
TIA!
Solved! Go to Solution.
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тАО12-08-2009 08:44 AM
тАО12-08-2009 08:44 AM
Re: DRD Available for Linux? Rapid OS Fall Back Schemes?
Best commercial tool I've used is http://www.acronis.com
It costs money, but can handle system images and restore them pretty quickly when called for.
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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тАО12-09-2009 11:54 PM
тАО12-09-2009 11:54 PM
Re: DRD Available for Linux? Rapid OS Fall Back Schemes?
so, you don't have a mirror during patching, big deal!
protection against human error should be there in the form of regular (daily) backups.
linux is rather modular, and its packaging system is rather robust, i've had multiple updates gone wrong (power lost, disk issues, you know). i never had it result in a non bootable system (not saying it can't happen, though). ofcourse, the package commands did complain, and the issue had to be fixed before rpm or dpkg would work again.
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тАО12-10-2009 05:15 AM
тАО12-10-2009 05:15 AM
Re: DRD Available for Linux? Rapid OS Fall Back Schemes?
For example:
VM snapshots - Red Hat Enterprise Virtualization virtual machine snapshots allow administrators to apply patches and upgrades in a transactional way, and roll back to a known good snapshot if the patch runs into an issue.
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тАО12-10-2009 07:00 AM
тАО12-10-2009 07:00 AM
Re: DRD Available for Linux? Rapid OS Fall Back Schemes?
Our gold standard is vMare for Linux Virtualization. I've test drove and pitched KVM (aka RHEV) but no dice.
Our Large Linux Environments -- gerater than 4 socket/16-way systems will not be virtualized and are standalone systems - and this is really what I am architecting for - how to have a Quick OS Fallback Solution.
MondoRescue works great but not as fast as a fimple fall back ala DRDroot on HP-UX.
I am currently experimenting with having a backup vg00 on a separate disk with its own /boot that will be updated regulary (simple dd's plus fixes to grub and fstab)...
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тАО12-10-2009 07:02 AM
тАО12-10-2009 07:02 AM
Re: DRD Available for Linux? Rapid OS Fall Back Schemes?
Our standard OS config is LVM2 on HW RAID protcted disk. I've got another similarly sized disk.
TIA...
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тАО12-11-2009 12:00 AM
тАО12-11-2009 12:00 AM
Solutionthis one deals with taking lvm snapshots and restoring them.
http://www.howtoforge.com/linux_lvm_snapshots