Hi Ashley,
You could move your Journal to another SSD this would remove the
double write.
If I move the journal to another SSD, I will loss an available OSD, so
this is likely to say improve of *x2* and then decrease of *x½ *...
this should not improve performance in any case on a full SSD disks system.
Ideally you’d want one or two PCIe NVME in the servers for the Journal.
This seems a really good Idea, but image that I have only 2 slots for
PCIe and 12 SSD disks.
I image that it's will not be possible place 12 Journal on 2 PCIe NVME
without loss performance..... or yes?
Or if you can hold off a bit then bluestore, which removes the double
write, however is still handy to move some of the services to a
seperate disk.
I hear that bluestore will remove double writing on journal (still not
investigated), but I guess Luminous will be fully tested not before the
end of the year.
About the today system really don't know if moving on a separate disks
will have some impact considering that this is a full SSD disks system.
Even adding 2 PCIe NVME.... why should not use them as a OSD instead of
journal solo?
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