I'm using filebench to measure some NFS/RDMA performance, but I don't see the
randomwrite scaling at all; I get the same thruput numbers whether using 1, 8,
or 16 streams. I'm using the same profiles for randomreads and they seem to
scale as expected.
Sample .prof stanzas:
DEFAULTS {
runtime = 120;
dir = /mnt_tmpfs_rdma;
stats = /tmp;
filesystem = nfs;
description = "randomwrite tmpfs";
}
CONFIG randomwrite512k {
function = generic;
personality = randomwrite;
filesize = 160m;
iosize = 512k;
nthreads = 8;
directio = 1;
}
I vary the iosize between 4K and 1024K, so this is just a sample. As I said, I
get the same numbers no matter what nthreads is set to. Weird. What am I
missing?
Client and server are both running snv_115.
Thanks,
John.
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