Hello all!
I have an interesting task: write to array a dump of network traffic from 10Gbit/s channel.
Topology is quiet simple: network tap, capture server and NetApp array.
NetApp array directly connected to the server via another 10Gbps port. Also I am using NFSv3.
Now I tested this solution with one FAS6250 in cluster mode together with 20HDD of SAS drives or 20HDD of SATA drives.
Performance is the same (SATA/SAS) - near 450MB per second. This is 2 times slower than I expected... 😃
We planned to use HA pair of FAS8040 in the future and expected 3000MB speed (2x10Gb links).
Now we have a lot of questions. Is it possible? May be we missed some configuration? Could you help me with performance tuning or it is impossible?
On the capture server (NFS client) side I have mount options:
type nfs (rw,bg,hard,intr,rsize=1048576,wsize=1048576,vers=3,proto=tcp,timeo=600,retrans=2)
Writing has 32 threads inside.
Also I tuned the sysctl.conf parameters:
net.core.rmem_default=524288
net.core.wmem_default=524288
net.core.rmem_max=16777216
net.core.wmem_max=16777216
net.ipv4.tcp_rmem=4096 524288 16777216
net.ipv4.tcp_wmem=4096 524288 16777216
net.ipv4.ipfrag_high_thresh=524288
net.ipv4.ipfrag_low_thresh=393216
net.ipv4.tcp_timestamps=0
net.ipv4.tcp_window_scaling=1
net.core.optmem_max=524287
net.core.netdev_max_backlog=2500
sunrpc.tcp_slot_table_entries=128
sunrpc.udp_slot_table_entries=128
I will wait your feedback.
Thank you in advance!
