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Full Discussion: Moving filesystems into LVM - query.
Operating Systems Linux Red Hat Moving filesystems into LVM - query. Post 302925917 by gull04 on Thursday 20th of November 2014 07:03:50 AM
Old 11-20-2014
Hi Peasant,

I understand where you are comming from on this, but for relocating/moving/virtualising systems there are much more appropriate ways of doing it! On this job I've personally relocated more than 100 servers, the previous job it was almost 1000 as part of a team. The only outage suffered was on the legacy equipment that had to move data centres (lift and shift).

My preferred tools are TDMF and DRBD, both of which allow move/relocate function without any significant outages. Using LVM mirroring does make things easier in this context, but trying to mirror a multi Tb Oracle DB accross a WAN is problematic and in my experience custom tools do a better job.

Regards

Dave
 

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LEARN ABOUT MOJAVE

vgscan

VGSCAN(8)                                                     System Manager's Manual                                                    VGSCAN(8)

NAME

       vgscan - scan all disks for volume groups and rebuild caches

SYNOPSIS

       vgscan [-d|--debug] [-h|-?|--help] [--ignorelockingfailure] [--mknodes] [-P|--partial] [-v|--verbose]

DESCRIPTION

       vgscan  scans all SCSI, (E)IDE disks, multiple devices and a bunch of other disk devices in the system looking for LVM physical volumes and
       volume groups.  Define a filter in lvm.conf(5) to restrict the scan to avoid a CD ROM, for example.

       In LVM2, vgscans take place automatically; but you might still need to run one explicitly after changing hardware.

OPTIONS

       See lvm for common options.

       --mknodes
              Also checks the LVM special files in /dev that are needed for active logical volumes and creates any missing ones and removes unused
              ones.

SEE ALSO

       lvm(8), vgcreate(8), vgchange(8)

Sistina Software UK                                      LVM TOOLS 2.02.95(2) (2012-03-06)                                               VGSCAN(8)
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