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ceph journal

Hi Guys,

i'm planning to add more ceph server into our environment. assuming my server has 12 disk for OSD and i have 1 SSD. can someone suggest me the best approach to get my SSD being used as a journal disk for all 12 disk. i understand, the best would be 1SSD for every single disk. since i would like to save a little bit cost on that so i just want to have 1 SSD covers all 12 OSD. i understand the drawback will be causing me loose data if my SSD go down. please advise.