EX4100 Write Speed

paulmh5 · June 21, 2019, 1:42pm

Hi

I Have just bought an EX4100 and installed my own 4 disks. These are configured in RAID5 and I am using an NFS share to write data to the NAS.
I’m currently seeing the write speed (at least data on the wire) top out at about 116Mbps while the CPU on the NAS it running at 100%. Is this really the best it can do?

Thanks

Paul

TonyPh12345 · June 21, 2019, 2:40pm

Just to be clear: You’re saying 116 megaBITS per second, not megaBYTES?

If the former, then yeah, that’s pretty slow. I’m not using NFS, but I can get data into my EX4 (older version of the EX4100 at close to 90Mbyte/sec.

/mounts/ex4> dd of=test.trash if=/dev/zero bs=1000000
(let it run for a minute then ^C)
8303+0 records in
8303+0 records out
8303000000 bytes (8.3 GB, 7.7 GiB) copied, 91.6634 s, 90.6 MB/s

Keep in mind, though, that if what you’re copying consists of bazillions of small files, then it WILL be substantially slower.

paulmh5 · June 21, 2019, 3:00pm

Hi

Yes its in bits (see attached graphs). I’m sending a vmdk file from an ESXi server (the CPU graph has a gap as the server was off for the copy) so it should be one big file as far as I can tell, or at least to NFS anyway)

Paul