Commit Graph

9 Commits (10ee4f7c1d8dbdfa45f1ff78baf4ca5f4d56fe07)

Author SHA1 Message Date
Vitaliy Filippov 10ee4f7c1d Add notes about CSI to README 2021-05-16 01:38:01 +03:00
Vitaliy Filippov 971aa4ae4f Implement RDMA receive with memory copying (send remains zero-copy)
This is the simplest and, as usual, the best implementation :)

100% zero-copy implementation is also possible (see rdma-zerocopy branch),
but it requires to create A LOT of queues (~128 per client) to use QPN as a 'tag'
because of the lack of receive tags and the server may simply run out of queues.
Hardware limit is 262144 on Mellanox ConnectX-4 which amounts to only 2048
'connections' per host. And even with that amount of queues it's still less optimal
than the non-zerocopy one.

In fact, newest hardware like Mellanox ConnectX-5 does have Tag Matching
support, but it's still unsuitable for us because it doesn't support scatter/gather
(tm_caps.max_sge=1).
2021-04-29 02:34:45 +03:00
Vitaliy Filippov 33f9d03d22 Update documentation regarding image names and vitastor-nbd 2021-04-17 17:40:12 +03:00
Vitaliy Filippov c72fddd714 Notes about master/0.5.x 2021-04-10 17:44:12 +03:00
Vitaliy Filippov 7308d6a6c0 Note about etcd 3.4.15 2021-04-10 17:44:12 +03:00
Vitaliy Filippov 879ecfa74d Fix wording 2021-04-10 17:44:12 +03:00
Vitaliy Filippov aea2d19d35 Change Telegram chat link 2021-04-10 17:44:12 +03:00
Vitaliy Filippov 04f86dc00b Fix Russian README for CMake build 2021-04-10 17:44:12 +03:00
Vitaliy Filippov e50f703e1d Add Russian version of the README 2021-04-10 17:44:12 +03:00