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?
