On 2020-09-02 01:04, Danil Kipnis wrote: > RTRS allows for reliable transmission of sg lists between two hosts > over rdma. It is optimised for block io. One can implement a client > and a server module on top of RTRS which would allow for reliable > transmission to a group of hosts. > > In the networking world this is called reliable multicast. I think one > can say that reliable multicast is an equivalent to what is called > "mirror" in the storage world. There is something called XoR network > coding which seems to be an equivalent of raid5. There is also Reed > Solomon network coding. > > Having a reliable multicast with coding rdma-based transport layer > would allow for very flexible and scalable designs of distributed > replication solutions based on different in-kernel transport, block > and replication drivers. > > What do you think? How will the resulting software differ from DRBD (other than that it uses RDMA)? How will it be guaranteed that the resulting software does not suffer from the problems that have been solved by the introduction of the DRBD activity log (https://www.linbit.com/drbd-user-guide/users-guide-drbd-8-4/#s-activity-log)? Thanks, Bart.
