On Wed, Jan 23, 2019 at 1:59 AM Lindolfo Meira <meira@xxxxxxxxxxxxxx> wrote:
Dear all,
I've been trying to benchmark a gluster file system using the MPIIO API of
IOR. Almost all of the times I try to run the application with more than 6
tasks performing I/O (mpirun -n N, for N > 6) I get the error: "writev:
Transport endpoint is not connected". And then each one of the N tasks
returns "ERROR: cannot open file to get file size, MPI MPI_ERR_FILE:
invalid file, (aiori-MPIIO.c:488)".
Does anyone have any idea what's going on?
I'm writing from a single node, to a system configured for stripe over 6
bricks. The volume is mounted with the options _netdev and transport=rdma.
I'm using OpenMPI 2.1.2 (I tested version 4.0.0 and nothing changed). IOR
arguments used: -B -E -F -q -w -k -z -i=1 -t=2m -b=1g -a=MPIIO. Running
OpenSUSE Leap 15.0 and GlusterFS 5.3. Output of "gluster volume info"
follows bellow:
Volume Name: gfs
Type: Stripe
stripe has been deprecated. You can use sharded volumes.
Volume ID: ea159033-5f7f-40ac-bad0-6f46613a336b
Status: Started
Snapshot Count: 0
Number of Bricks: 1 x 6 = 6
Transport-type: rdma
Bricks:
Brick1: pfs01-ib:/mnt/data/gfs
Brick2: pfs02-ib:/mnt/data/gfs
Brick3: pfs03-ib:/mnt/data/gfs
Brick4: pfs04-ib:/mnt/data/gfs
Brick5: pfs05-ib:/mnt/data/gfs
Brick6: pfs06-ib:/mnt/data/gfs
Options Reconfigured:
nfs.disable: on
Thanks in advance,
Lindolfo Meira, MSc
Diretor Geral, Centro Nacional de Supercomputação
Universidade Federal do Rio Grande do Sul
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