Re: [HPDD-discuss] Lustre file read/write operations

Hi Oleg, Thanks a lot for the detailed explanation. Things look much clearer to me now. A few questions that still linger in my mind. Sorry for asking too many questions. 1. Since the interaction between the OSS and client is through the OSC in the client, I suppose it would also take care of the data locking mechanism. (locked from the OSS). I hope my understanding is correct here. 2. "For all stripes that would need to change, revoke OST data locks -> this causes all clients having caches for these objects to flush those caches." --> Here you mentioned that in case of restriping, the OST data locks would be revoked. Here would the MDS/MST contact the OSS/OST asking those locks to be revoked or the client would contact OSS/OSTs. I am trying to understand the below diagram showing the restriping steps. (Specifically the "Update L.Gen" message from the client to the primary replica). Regards, Akhilesh Gadde.