On Fri, 7 Feb 2020, at 07:04, Gene Heskett wrote: > But file moves to/from the machines in the garage seems to indicate > theres a slow connection of around 10Mb/s someplace in that path.
Later you said: > But on really big writes, the ssd's decay to around 17-20 mb/s. Surely here you meant MB/s? If the SSDs will take data at 17-20 MBps then that will need more than just (17-20) * 8 ie 136-160 Mbps data to be transferred across the network, as far as I know. There's protocol/control data that is passed around as well. In the past I found it simpler to multiply / divide by ten, so for 17 MB to pass across a network I'd assume the network would move approximately 170 Megabits. Maybe things are more efficient now? Anyway if SSD speed is the issue, your network is presumably moving nearer 170-200 Mbps to feed the disks at their max rate. That's nearly 20 times the "slow" data rate you mentioned in your original question. -- Jeremy Nicoll - my opinions are my own.