We have lvroots on all our systems, in the past we had root without lvm and honestly in both scenarios there always was a way to get to the data in case of problems of course if all devices were available.
But it is always good to have unique vgnames (we do hostname_vgroot for example). LVM actually made some migrations between different storage systems easier (but that was FCP). Thanks to lvm we didn't have to worry about some aspects (mounts were always referring to /dev/mapper/vgname-lvname etc no matter what the underlying device names were) boot I still usually leave outside of LVM Greg 2016-08-23 21:20 GMT+02:00 Robert J Brenneman <bren...@gmail.com>: > It depends on what you consider to be the bigger problem. > > A) having to care upfront about what needs space where is hard. Make / one > huge logical volume and don't worry about space until you need more, then > just grow / online. > > B) fixing a machine that won't boot is hard. When /'s contents are smeared > across multiple devices it is tough to get the machine to a working state > again, often requiring the service of a dedicated emergency rescue system. > > Note that this is further complicated by cloud management tools that impose > their own restrictions on system disk layouts. It seems like no matter what > you prefer, your cloud tools won't handle your chosen file system layout > unless you like one big vanilla / partition with ext3 and no lvm at all. > > On Tue, Aug 23, 2016, 13:26 Donald Russell <russell....@gmail.com> wrote: > > > We have rhel5 with rootvg and rootlv. That caused us some grief when a > root > > password was lost and we "simply wanted to mount it on another system". > > Not so fast there skippy, all the systems have rootvg/lv so we had to > work > > around that... (Not rocket science, but inconvenient) > > > > Now, (upgrading to rehl7) we put the "basic Linux system" on a > > simple-to-use Mod-9 and use LVM for application file systems and a few > > others. Now it's very simple to mount that / file system on another > server > > if necessary. > > > > > > > > > > > > On Tuesday, August 23, 2016, Michael Weiner <mwei...@infinite-blue.com> > > wrote: > > > > > Good morning all, > > > > > > I was having a little debate yesterday and I want to get the experts on > > > this list opinions. > > > > > > What's the best practice when it comes to the root directory? > > > > > > Is it acceptable and recommend to create an vgroot and lvroot so it is > > > expandable? > > > > > > Or is it recommended to have the root directory as a regular directory > > and > > > not expandable. > > > > > > Thank you! > > > > > > > > > Sent from my iPhone > > > > > > > > > Sent from my iPhone > > > ---------------------------------------------------------------------- > > > For LINUX-390 subscribe / signoff / archive access instructions, > > > send email to lists...@vm.marist.edu <javascript:;> with the message: > > > INFO LINUX-390 or visit > > > http://www.marist.edu/htbin/wlvindex?LINUX-390 > > > ---------------------------------------------------------------------- > > > For more information on Linux on System z, visit > > > http://wiki.linuxvm.org/ > > > > > > > > > -- > > Sent from iPhone Gmail Mobile > > > > ---------------------------------------------------------------------- > > For LINUX-390 subscribe / signoff / archive access instructions, > > send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or > > visit > > http://www.marist.edu/htbin/wlvindex?LINUX-390 > > ---------------------------------------------------------------------- > > For more information on Linux on System z, visit > > http://wiki.linuxvm.org/ > > > > ---------------------------------------------------------------------- > For LINUX-390 subscribe / signoff / archive access instructions, > send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or > visit > http://www.marist.edu/htbin/wlvindex?LINUX-390 > ---------------------------------------------------------------------- > For more information on Linux on System z, visit > http://wiki.linuxvm.org/ > ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
