How to test rbd's Copy-on-Read Feature

[Tanay Ganguly <tanayganguly@xxxxxxxxx>]

Hello All,

I went through the below link and checked that Copy-on-Read is currently supported only on librbd and not on rbd kernel module.

https://wiki.ceph.com/Planning/Blueprints/Infernalis/rbd%3A_kernel_rbd_client_supports_copy-on-read

Can someone please let me know how to test Copy-on-Read using librbd ?

What should be the IO pattern to see the performance changes.

Any pointers appreciated.

Thank You,

Tanay

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