What is the maximum size of thin pool metadata?

Solution Verified - Updated -

Environment

  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9

Issue

  • What is the maximum size of thin pool metadata?

Resolution

  • The supported value for the thin pool's metadata logical volume is in the range between 2MiB to approximately 15.88GiB as per BZ#1909699.
  • It can be hard to predict the amount of metadata space that will be needed, so it is recommended to start with a size of 1GiB which should be enough for all practical purposes. A thin pool metadata LV can later be manually or automatically extended if needed.

  • From man page of #lvmthin

         Size of pool metadata LV
     The amount of thin metadata depends on how many blocks are shared
     between thin LVs (i.e. through snapshots).  A thin pool with many
     snapshots may need a larger metadata LV.  Thin pool metadata LV
     sizes can be from 2MiB to approximately 16GiB.

This solution is part of Red Hat’s fast-track publication program, providing a huge library of solutions that Red Hat engineers have created while supporting our customers. To give you the knowledge you need the instant it becomes available, these articles may be presented in a raw and unedited form.

Comments