Public bug reported:
ceph-volume lvm list calls take very long time due to the fact it has
been implemented with O(n^2). This leads to unproportionally long
execution time taking under consideration the fact that no complex
computation is needed.
Steps to reproduce:
1. Create a setup with a large number of disks and logical volumes (e.g. 24)
2. Call ceph-volume lvm list for one of the disks.
3. Wait for the call to finish.
Expected result:
Call is executed within seconds at most.
Actual result:
Call may take even minutes in some circumstances (large number of disks, some
OSDs stopped).
** Affects: ceph
Importance: Unknown
Status: Unknown
** Affects: ceph (Ubuntu)
Importance: Undecided
Assignee: Dariusz Gadomski (dgadomski)
Status: New
** Bug watch added: tracker.ceph.com/issues #37490
http://tracker.ceph.com/issues/37490
** Also affects: ceph via
http://tracker.ceph.com/issues/37490
Importance: Unknown
Status: Unknown
** Changed in: ceph (Ubuntu)
Assignee: (unassigned) => Dariusz Gadomski (dgadomski)
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https://bugs.launchpad.net/bugs/1850754
Title:
ceph-volume lvm list is O(n^2)
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