From 05d2d4a401cb2497185b091e666638e01f1d7f1d Mon Sep 17 00:00:00 2001 From: Raghavendra G Date: Tue, 18 Dec 2012 12:47:43 +0530 Subject: rpc-transport/rdma: use rdma-cm for connection establishment. Till now gluster used tcp/ip based communication channel with gluster specific protocol to exchange infiniband addresses. Change-Id: I9de4db398a0e2af51d3d2d68c2fe42168102b190 BUG: 765051 Signed-off-by: Raghavendra G Reviewed-on: http://review.gluster.org/149 Tested-by: Gluster Build System Reviewed-by: Vijay Bellur --- doc/rdma-cm-in-3.4.0.txt | 9 +++++++++ 1 file changed, 9 insertions(+) create mode 100644 doc/rdma-cm-in-3.4.0.txt (limited to 'doc') diff --git a/doc/rdma-cm-in-3.4.0.txt b/doc/rdma-cm-in-3.4.0.txt new file mode 100644 index 000000000..fd953e56b --- /dev/null +++ b/doc/rdma-cm-in-3.4.0.txt @@ -0,0 +1,9 @@ +Following is the impact of http://review.gluster.org/#change,149. + +New userspace packages needed: +librdmacm +librdmacm-devel + +rdmacm needs an IPoIB address for connection establishment. This requirement results in following issues: +* Because of bug #890502, we've to probe the peer on an IPoIB address. This imposes a restriction that all volumes created in the future have to communicate over IPoIB address (irrespective of whether they use gluster's tcp or rdma transport). +* Currently client has an independence to choose b/w tcp and rdma transports while communicating with the server (by creating volumes with transport-type tcp,rdma). This independence was a byproduct of our ability use the normal channel used with transport-type tcp for rdma connectiion establishment handshake too. However, with new requirement of IPoIB address for connection establishment, we loose this independence (till we bring in multi-network support - where a brick can be identified by a set of ip-addresses and we can choose different pairs of ip-addresses for communication based on our requirements - in glusterd). -- cgit