Bug 1420940 - [RFE] Support increased numbers of logical volumes
Summary: [RFE] Support increased numbers of logical volumes
Status: NEW
Alias: None
Product: LVM and device-mapper
Classification: Community
Component: lvm2
Version: unspecified
Hardware: Unspecified
OS: Unspecified
Target Milestone: Fedora
: ---
Assignee: LVM and device-mapper development team
QA Contact: cluster-qe@redhat.com
Depends On:
Blocks: stratis-lvm-reqs
TreeView+ depends on / blocked
Reported: 2017-02-09 23:06 UTC by Andy Grover
Modified: 2020-12-02 18:50 UTC (History)
12 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
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Clone Of:
Last Closed:
rule-engine: lvm-technical-solution?
rule-engine: lvm-test-coverage?

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Description Andy Grover 2017-02-09 23:06:22 UTC
Stratis would like to support pools with 1000+ PVs and 1M+ LVs. So many are desired because we may want 3-5K primary thin volumes on the pool, but also desire periodic auto-snapshotting capabilities, which then could result in large numbers of secondary read-only LVs to be created frequently, and these need to be tracked somehow.

Comment 1 Fedora End Of Life 2017-02-28 11:14:15 UTC
This bug appears to have been reported against 'rawhide' during the Fedora 26 development cycle.
Changing version to '26'.

Comment 2 Fedora End Of Life 2018-05-03 08:03:29 UTC
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Comment 3 Zdenek Kabelac 2018-05-03 08:38:35 UTC
This request is more or less beyond the scope of lvm2 itself.

Supportability of using a single thin-pool with 1K+ LVs running them moreover at the same time is ATM rather illusion.

Thin-pool target works optimally for  tens of volumes activates at one time.

Thin-pool metadata size is strictly limited to 16GB - and we know users are able to fill even these size with low number of volumes.

Risk of loosing very huge amount of data in case there would be metadata damage is way too high above any sensible limits.

We are not aware of any user requirements even asking for support such use-case.

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