Ceph RADOS linearizable?

[Ralph Boehme]

Hey David,

I'm currently doing some research into distributed databases. I'm 
tracking candidates here:

https://wiki.samba.org/index.php/Samba_on_Scale

One of the tricky things is figuring out the consistency level [1] 
provided by the database. There's no public RADOS documentation that 
clearly describes the consistency provided in industry standard terms, 
I'm pretty sure it's linearizabile, but the only real reference 
mentioning linearizability I could find is from a RADOS related research 
paper that talks about adding support for weaker consistency levels:

http://www.cs.nthu.edu.tw/~ychung/conference/2016_ICPADS.pdf

Can you confirm whether RADOS is indeed Linearizabile? I'm pretty sure 
it is, but would like to be sure. :)

Thanks!
-slow

[1] <https://jepsen.io/consistency>

-- 
Ralph Boehme, Samba Team                 https://samba.org/
SerNet Samba Team Lead      https://sernet.de/en/team-samba
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