Hello,

I have installed a ceph firefly (0.80) on my system last year.
I run a 3.14.43 kernel (I upgraded it recently from 3.14.4). ceph seems to be 
working well in most cases, though I haven't used it in real production mode as 
of now.
The only thing I noticed recently was some Input/Output Error on a replicated 
block-device that I mounted successively on a node, then another when I stopped 
brutally the first one, then back on the first node, but I'm not asking for 
help on this problem now, as long as I don't know more about it (ceph is 
probably not to incrimnate).

My question is :
should I upgrade ceph ?
do I take risks doing it ?
what would be the benefits ?
are there some behaviour changes that could cause problems ?

I make minimal use of ceph :
- 2 storage nodes only, with potentially several dozens of terabytes of disk, 
but probably not more than 32 GB of RAM
- use of ceph block-device only, to create a replicated partition with almost 
all the disk space to make backups on it

Thanks

Pascal
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