LVM Limitations in Centos 7.3

[nikmich]

Hi all,

My setup is Centos 7.3 - Kernel 3.10.0-514

I have found out that the limit of an LV is 8 exabytes, so there's no limitation, but what about the upper level?
Is there a limitation regarding the total amount of physical volumes permitted in a VG? If so, what it is?
Moreover, is there a maximum size per physical device (let's say 2TB)?

Any concerns in building up an LV with 30-40 physical devices as members of a single Volume Group?
Thank you in advance.

[jlehtone]

First, there is no "7.3" any more. The CentOS 7 is currently based on "7.5". Everything else is deprecated and unsupported. Please update at your earliest convenience.

RHEL lists limits for filesystems:
https://access.redhat.com/solutions/1532
https://access.redhat.com/articles/rhel-limits
Alas, no LVM mentioned.

I would not build such LV. How have you planned to cope when one of the devices breaks?

You should check the ceph http://docs.ceph.com/docs/jewel/start/h ... endations/
There are RPM-packages for it.