[ceph-users] Question about MDS cluster's behavior when crash occurs

Hi all. I have some questions about how MDS cluster works when crash or operation failure occur. 1. I read ceph documentation and code that each MDS has its own journal and some directory operations like rename use distributed transaction mechanism with ceph-defined events (e.g. EPeerUpdate). Wha

[ceph-users] Question about per MDS journals

Hi. I'm a newbie in CephFS and I have some questions about how per-MDS journals work. In Sage's paper (osdi '06), I read that each MDSs has its own journal and it lazily flushes metadata modifications on OSD cluster. What I'm wondering is that some directory operations like rename work with multip