> Now 25 years later lot of people recommend to use replica so if I buy XTo
> I'm only going to have X/3 To (vs raidz2 where I loose 2 disks over 9-12
> disks).
As seen from other answers, it changes which performance and space
usage you want go have, but there are other factors too. Replica = 3
(
Yes, lots of people are using EC.
Which is more “reliable” depends on what you need. If you need to survive 4
failures, there are scenarios where RF=3 won’t do it for you.
You could in such a case use an EC 4,4 profile, 8,4, etc.
It’s a tradeoff between write speed and raw::usable ratio effi
I use EC 4+2 on backup backup site, production site is running replica3,
running 8 servers on backup side and 12 on production side
number of OSDs per server is 16 on all of them
Production has lacp bonded 25G networking for public and cluster network
backup has just 10G networking with no red
