Breaking News
News & Analysis

LinkedIn Refines its Network

Cisco gets the boot in data center
2/11/2016 10:36 AM EST
4 comments
NO RATINGS
Page 1 / 2 Next >
More Related Links
View Comments: Newest First | Oldest First | Threaded View
uv-linkedin
User Rank
Rookie
Re: CPU utilization
uv-linkedin   2/12/2016 12:46:10 AM
NO RATINGS
First the discussion is around Linkedin and not FB. The Linkedin utilization numbers are averages and have a very wide range and distribution. For some aspects of our design enbaling higher network bandwith and faster IO enbale the Apps to optimize for bettter peromance and CPU utilization. The reference was not for a single core but to a single socket solution.

uv-linkedin
User Rank
Rookie
Re: LinkedIn Refines its Network
uv-linkedin   2/12/2016 12:41:18 AM
NO RATINGS
The connection to the servers in our einvarmnet is 10G Copper with an optional to go to 25G copper. We use optical only outside of the server rack.

The reason to write an OS is very wide but it's mostly to ensure that we can innovate ourselves, have a fast feature velocity, and efficiency in design and unit cost.

docdivakar
User Rank
Author
Re: LinkedIn Refines its Network
docdivakar   2/11/2016 5:11:07 PM
NO RATINGS
It is quite interesting to note that LinkedIn began with a white box switch and altered it to integrate its management system. But I am surprised it has chosen to write its switch OS, probably it would have been easier to license from a switch vendor and customize as needd.

Since it is a ToR switch, what does LinkedIn use to connect with the server nodes which are usually 10G Ethernet? Fiberoptic links or Copper?

MP Divakar

GSMD
User Rank
Author
CPU utilization
GSMD   2/11/2016 12:14:06 PM
NO RATINGS
In banks I audited I have seen average CPU utilization of 2-3 %. But I did not expect FB to report low server utilization. So are the CPU perf.  wars all for nothing ? Makes sense that FB would prefer to use the extra silicon for other purposes like I/O. Also helps in my server processor design, now I know the sweet spot for single core performance !

Most Recent Comments

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
Like Us on Facebook
EE Times on Twitter
EE Times Twitter Feed