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interpretation of iperf results

NIC, network controllers, compatibility questions, WOL, wake on lan
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drnicolas
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interpretation of iperf results

Post by drnicolas »

I have strange results from a iperf test.

PC1: physical NAs4Free based on HP N54L
PC2: ESXi 5.1 based VM running W2008R2 with BackupExec and a LTO Tape passed through.

because of slow running tape backups, I tested with iperf

iperf -s on the virtual machine and iperf -c on the HP54L gives me 936 Mbit/s, which seems to be a good value.

The other way round gives only 313 MBit/s

What can be the reason ?

P.S.: Another test with another VM behaves similar
HP Proliant N54L - Bios Mod -16GB non-ECC-RAM - ZFS RAIDZ1 (3x3TB) - 1VM running XigmaNAS 11.2.0.4.6026

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raulfg3
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Re: interpretation of iperf results

Post by raulfg3 »

drnicolas wrote:What can be the reason ?
the LAN VM driver is not the best possible for your NIC. try other or try to put an INTEL NIC that have normally better support.
12.1.0.4 - Ingva (revision 7743) on SUPERMICRO X8SIL-F 8GB of ECC RAM, 11x3TB disk in 1 vdev = Vpool = 32TB Raw size , so 29TB usable size (I Have other NAS as Backup)

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