Posts by stephanielee

Pimp my racks: Scale-out filer startup Qumulo bangs up its boxen, er, '4U'

Re: About 10Gb networking

Pros of 10GBASE-T

- Cheap twisted pair cables.

-Patch panels can be used without messing around with transceivers.

Cons of 10GBASE-T

- Higher power consumption.

- People may get tempted to use substandard cabling, and this would have a negative influence on the speed.

- No good way to extend length beyond 100m (though this can be somewhat mitigated by choosing switches with mostly 10GBASE-T but also a handful of SFP+ ports) limited choice of equipment.

Pros of SFP+

- Lower latency

- Lower power consumption

- Cheaper NICs and switches

- More choice of connected equipment.

- With transceivers and fiber basically any run length can be covered.

Cons of SFP+

- Apparently, it is not a big deal for transmission within short distance.

- For longer runs or runs that need to go through patch panels needs transceivers and optical fiber. Fiber itself is cheap but transceivers, termination, patch panels, and etc for fiber would cost a lot.

Copper feel, fibre it ain't: Ads regulator could face court for playing hard and fast with definitions

Re: Fibre vs Copper

I favor twinax DAC cable, cause it can effectively eliminate the expensive optical transceiver required in the equipment they connected.

If distance is not a problem, I will tend to choose SFP+ cable because of the lower power needs and lower latency it provides, and the power saving alone is significant.