[Gluster-users] [ovirt-users] Hot to force glusterfs to use RDMA?

Fri Mar 3 08:08:55 UTC 2017

>> As you can see from my previous email that the RDMA connection tested with qperf.
I think you have wrong command. Your testing TCP & not RDMA. Also check if you have RDMA & IB modules loaded on your hosts.
root at clei26 ~]# qperf clei22.vib  tcp_bw tcp_lat
tcp_bw:
    bw  =  475 MB/sec
tcp_lat:
    latency  =  52.8 us
[root at clei26 ~]#

Please run below command to test RDMA

[root at storageN2 ~]# qperf storageN1 ud_lat ud_bw
ud_lat:
    latency  =  7.51 us
ud_bw:
    send_bw  =  9.21 GB/sec
    recv_bw  =  9.21 GB/sec
[root at sc-sdgx-202 ~]#

Read qperf man pages for more info.

    * To run a TCP bandwidth and latency test:
        qperf myserver tcp_bw tcp_lat
    * To run a UDP latency test and then cause the server to terminate:
        qperf myserver udp_lat quit
    * To measure the RDMA UD latency and bandwidth:
        qperf myserver ud_lat ud_bw
    * To measure RDMA UC bi-directional bandwidth:
        qperf myserver rc_bi_bw
    * To get a range of TCP latencies with a message size from 1 to 64K
        qperf myserver -oo msg_size:1:64K:*2 -vu tcp_lat

Check if you have RDMA & IB modules loaded

lsmod | grep -i ib

lsmod | grep -i rdma

--
Deepak

From: Arman Khalatyan [mailto:arm2arm at gmail.com]
Sent: Thursday, March 02, 2017 10:57 PM
To: Deepak Naidu
Cc: Rafi Kavungal Chundattu Parambil; gluster-users at gluster.org; users; Sahina Bose
Subject: RE: [Gluster-users] [ovirt-users] Hot to force glusterfs to use RDMA?

Dear Deepak, thank you for the hints, which gluster are you using?
As you can see from my previous email that the RDMA connection tested with qperf. It is working as expected. In my case the clients are servers as well, they are hosts for the ovirt. Disabling selinux is nor recommended by ovirt, but i will give a try.

Am 03.03.2017 7:50 vorm. schrieb "Deepak Naidu" <dnaidu at nvidia.com<mailto:dnaidu at nvidia.com>>:
I have been testing glusterfs over RDMA & below is the command I use. Reading up the logs, it looks like your IB(InfiniBand) device is not being initialized. I am not sure if u have an issue on the client IB or the storage server IB. Also have you configured ur IB devices correctly. I am using IPoIB.
Can you check your firewall, disable selinux, I think, you might have checked it already ?

mount -t glusterfs -o transport=rdma storageN1:/vol0 /mnt/vol0

•         The below error seems if you have issue starting your volume. I had issue, when my transport was set to tcp,rdma. I had to force start my volume. If I had set it only to tcp on the volume, the volume would start easily.

[2017-03-02 11:49:47.829391] E [MSGID: 114022] [client.c:2530:client_init_rpc] 0-GluReplica-client-2: failed to initialize RPC
[2017-03-02 11:49:47.829413] E [MSGID: 101019] [xlator.c:433:xlator_init] 0-GluReplica-client-2: Initialization of volume 'GluReplica-client-2' failed, review your volfile again
[2017-03-02 11:49:47.829425] E [MSGID: 101066] [graph.c:324:glusterfs_graph_init] 0-GluReplica-client-2: initializing translator failed
[2017-03-02 11:49:47.829436] E [MSGID: 101176] [graph.c:673:glusterfs_graph_activate] 0-graph: init failed

•         The below error seems if you have issue with IB device. If not configured properly.

[2017-03-02 11:49:47.828996] W [MSGID: 103071] [rdma.c:4589:__gf_rdma_ctx_create] 0-rpc-transport/rdma: rdma_cm event channel creation failed [No such device]
[2017-03-02 11:49:47.829067] W [MSGID: 103055] [rdma.c:4896:init] 0-GluReplica-client-2: Failed to initialize IB Device
[2017-03-02 11:49:47.829080] W [rpc-transport.c:354:rpc_transport_load] 0-rpc-transport: 'rdma' initialization failed

--
Deepak

From: gluster-users-bounces at gluster.org<mailto:gluster-users-bounces at gluster.org> [mailto:gluster-users-bounces at gluster.org<mailto:gluster-users-bounces at gluster.org>] On Behalf Of Sahina Bose
Sent: Thursday, March 02, 2017 10:26 PM
To: Arman Khalatyan; gluster-users at gluster.org<mailto:gluster-users at gluster.org>; Rafi Kavungal Chundattu Parambil
Cc: users
Subject: Re: [Gluster-users] [ovirt-users] Hot to force glusterfs to use RDMA?

[Adding gluster users to help with error]

[2017-03-02 11:49:47.828996] W [MSGID: 103071] [rdma.c:4589:__gf_rdma_ctx_create] 0-rpc-transport/rdma: rdma_cm event channel creation failed [No such device]

On Thu, Mar 2, 2017 at 5:36 PM, Arman Khalatyan <arm2arm at gmail.com<mailto:arm2arm at gmail.com>> wrote:
BTW RDMA is working as expected:
root at clei26 ~]# qperf clei22.vib  tcp_bw tcp_lat
tcp_bw:
    bw  =  475 MB/sec
tcp_lat:
    latency  =  52.8 us
[root at clei26 ~]#
thank you beforehand.
Arman.

On Thu, Mar 2, 2017 at 12:54 PM, Arman Khalatyan <arm2arm at gmail.com<mailto:arm2arm at gmail.com>> wrote:
just for reference:
 gluster volume info

Volume Name: GluReplica
Type: Replicate
Volume ID: ee686dfe-203a-4caa-a691-26353460cc48
Status: Started
Snapshot Count: 0
Number of Bricks: 1 x (2 + 1) = 3
Transport-type: tcp,rdma
Bricks:
Brick1: 10.10.10.44:/zclei22/01/glu
Brick2: 10.10.10.42:/zclei21/01/glu
Brick3: 10.10.10.41:/zclei26/01/glu (arbiter)
Options Reconfigured:
network.ping-timeout: 30
server.allow-insecure: on
storage.owner-gid: 36
storage.owner-uid: 36
cluster.data-self-heal-algorithm: full
features.shard: on
cluster.server-quorum-type: server
cluster.quorum-type: auto
network.remote-dio: enable
cluster.eager-lock: enable
performance.stat-prefetch: off
performance.io-cache: off
performance.read-ahead: off
performance.quick-read: off
performance.readdir-ahead: on
nfs.disable: on

[root at clei21 ~]# gluster volume status
Status of volume: GluReplica
Gluster process                             TCP Port  RDMA Port  Online  Pid
------------------------------------------------------------------------------
Brick 10.10.10.44:/zclei22/01/glu           49158     49159      Y       15870
Brick 10.10.10.42:/zclei21/01/glu           49156     49157      Y       17473
Brick 10.10.10.41:/zclei26/01/glu           49153     49154      Y       18897
Self-heal Daemon on localhost               N/A       N/A        Y       17502
Self-heal Daemon on 10.10.10.41             N/A       N/A        Y       13353
Self-heal Daemon on 10.10.10.44             N/A       N/A        Y       32745

Task Status of Volume GluReplica
------------------------------------------------------------------------------
There are no active volume tasks

On Thu, Mar 2, 2017 at 12:52 PM, Arman Khalatyan <arm2arm at gmail.com<mailto:arm2arm at gmail.com>> wrote:
I am not able to mount with RDMA over cli....
Are there some volfile parameters needs to be tuned?
/usr/bin/mount  -t glusterfs  -o backup-volfile-servers=10.10.10.44:10.10.10.42:10.10.10.41,transport=rdma 10.10.10.44:/GluReplica /mnt

[2017-03-02 11:49:47.795511] I [MSGID: 100030] [glusterfsd.c:2454:main] 0-/usr/sbin/glusterfs: Started running /usr/sbin/glusterfs version 3.8.9 (args: /usr/sbin/glusterfs --volfile-server=10.10.10.44 --volfile-server=10.10.10.44 --volfile-server=10.10.10.42 --volfile-server=10.10.10.41 --volfile-server-transport=rdma --volfile-id=/GluReplica.rdma /mnt)
[2017-03-02 11:49:47.812699] I [MSGID: 101190] [event-epoll.c:628:event_dispatch_epoll_worker] 0-epoll: Started thread with index 1
[2017-03-02 11:49:47.825210] I [MSGID: 101190] [event-epoll.c:628:event_dispatch_epoll_worker] 0-epoll: Started thread with index 2
[2017-03-02 11:49:47.828996] W [MSGID: 103071] [rdma.c:4589:__gf_rdma_ctx_create] 0-rpc-transport/rdma: rdma_cm event channel creation failed [No such device]
[2017-03-02 11:49:47.829067] W [MSGID: 103055] [rdma.c:4896:init] 0-GluReplica-client-2: Failed to initialize IB Device
[2017-03-02 11:49:47.829080] W [rpc-transport.c:354:rpc_transport_load] 0-rpc-transport: 'rdma' initialization failed
[2017-03-02 11:49:47.829272] W [rpc-clnt.c:1070:rpc_clnt_connection_init] 0-GluReplica-client-2: loading of new rpc-transport failed
[2017-03-02 11:49:47.829325] I [MSGID: 101053] [mem-pool.c:641:mem_pool_destroy] 0-GluReplica-client-2: size=588 max=0 total=0
[2017-03-02 11:49:47.829371] I [MSGID: 101053] [mem-pool.c:641:mem_pool_destroy] 0-GluReplica-client-2: size=124 max=0 total=0
[2017-03-02 11:49:47.829391] E [MSGID: 114022] [client.c:2530:client_init_rpc] 0-GluReplica-client-2: failed to initialize RPC
[2017-03-02 11:49:47.829413] E [MSGID: 101019] [xlator.c:433:xlator_init] 0-GluReplica-client-2: Initialization of volume 'GluReplica-client-2' failed, review your volfile again
[2017-03-02 11:49:47.829425] E [MSGID: 101066] [graph.c:324:glusterfs_graph_init] 0-GluReplica-client-2: initializing translator failed
[2017-03-02 11:49:47.829436] E [MSGID: 101176] [graph.c:673:glusterfs_graph_activate] 0-graph: init failed
[2017-03-02 11:49:47.830003] W [glusterfsd.c:1327:cleanup_and_exit] (-->/usr/sbin/glusterfs(mgmt_getspec_cbk+0x3c1) [0x7f524c9dbeb1] -->/usr/sbin/glusterfs(glusterfs_process_volfp+0x172) [0x7f524c9d65d2] -->/usr/sbin/glusterfs(cleanup_and_exit+0x6b) [0x7f524c9d5b4b] ) 0-: received signum (1), shutting down
[2017-03-02 11:49:47.830053] I [fuse-bridge.c:5794:fini] 0-fuse: Unmounting '/mnt'.
[2017-03-02 11:49:47.831014] W [glusterfsd.c:1327:cleanup_and_exit] (-->/lib64/libpthread.so.0(+0x7dc5) [0x7f524b343dc5] -->/usr/sbin/glusterfs(glusterfs_sigwaiter+0xe5) [0x7f524c9d5cd5] -->/usr/sbin/glusterfs(cleanup_and_exit+0x6b) [0x7f524c9d5b4b] ) 0-: received signum (15), shutting down
[2017-03-02 11:49:47.831014] W [glusterfsd.c:1327:cleanup_and_exit] (-->/lib64/libpthread.so.0(+0x7dc5) [0x7f524b343dc5] -->/usr/sbin/glusterfs(glusterfs_sigwaiter+0xe5) [0x7f524c9d5cd5] -->/usr/sbin/glusterfs(cleanup_and_exit+0x6b) [0x7f524c9d5b4b] ) 0-: received signum (15), shutting down

On Thu, Mar 2, 2017 at 12:11 PM, Sahina Bose <sabose at redhat.com<mailto:sabose at redhat.com>> wrote:
You will need to pass additional mount options while creating the storage domain (transport=rdma)
Please let us know if this works.

On Thu, Mar 2, 2017 at 2:42 PM, Arman Khalatyan <arm2arm at gmail.com<mailto:arm2arm at gmail.com>> wrote:
Hi,
Are there way to force the connections over RDMA only?
If I check host mounts I cannot see rdma mount option:
 mount -l| grep gluster
10.10.10.44:/GluReplica on /rhev/data-center/mnt/glusterSD/10.10.10.44:_GluReplica type fuse.glusterfs (rw,relatime,user_id=0,group_id=0,default_permissions,allow_other,max_read=131072)
I have glusterized 3 nodes:

GluReplica
Volume ID:
ee686dfe-203a-4caa-a691-26353460cc48
Volume Type:
Replicate (Arbiter)
Replica Count:
2 + 1
Number of Bricks:
3
Transport Types:
TCP, RDMA
Maximum no of snapshots:
256
Capacity:
3.51 TiB total, 190.56 GiB used, 3.33 TiB free

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