I don't understand how all of this is related to Ceph
Ceph runs on a dedicated hardware, there is nothing there except Ceph,
and the ceph daemons have already all power on ceph's data.
And there is no random-code execution allowed on this node.
Thus, spectre & meltdown are meaning-less for Ceph's node, and
mitigations should be disabled
Is this wrong ?
On 01/11/2018 06:26 PM, Dan van der Ster wrote:
Hi all,
Is anyone getting useful results with your benchmarking? I've prepared
two test machines/pools and don't see any definitive slowdown with
patched kernels from CentOS [1].
I wonder if Ceph will be somewhat tolerant of these patches, similarly
to what's described here:
http://www.scylladb.com/2018/01/07/cost-of-avoiding-a-meltdown/
Cheers, Dan
[1] Ceph v12.2.2, FileStore OSDs, kernels 3.10.0-693.11.6.el7.x86_64
vs the ancient 3.10.0-327.18.2.el7.x86_64
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