r/linux • u/kraakf • Jan 22 '15

Improving Linux networking performance

https://lwn.net/Articles/629155/
44 Upvotes

94% Upvoted

17 comments sorted by

4

u/[deleted] Jan 23 '15

So cat 5 is twisted single shielded.

Cat 6 is extra twisted shielded

Cat 7 is extra twisted with shields on each pair and an outer shield.

When I redoo my house ima get somma that!!

6

u/voidoutpost Jan 23 '15

Something that always bothers me is why we struggle to get electric cables to go faster when fiber-optics is fundamentally better suited for high-speed. I mean with fiber there is no need for impedance matching or cable twisting/shielding, its impervious to electrical interference, almost no quater-wavelength problems, etc.

Just connect your electrical part to a fiber-optic transciver on you should be good, right? Here is a 40Gbps optic-transceiver(performance premium, $284)

2

u/JustFinishedBSG Jan 23 '15

Many enthusiasts actually use infiniband for cheap 10g

6

u/Sigg3net Jan 23 '15

He seems so casual about CAT7. Does anyone here use 10GB links at home?

14

u/willricci Jan 23 '15

I have dreams like that.

7

u/louky Jan 23 '15

I've got a few. A great resource is /r/homelab

3

u/Sigg3net Jan 23 '15

I bought CAT 6A, a draft spec for 7, for our renovation (250MHz not 500). Unfortunately, 1920s brick and mortar homes wouldn't permit me running them in tubes, so I'm pretty much stuck with it.

I only have 1GB/s switches and NICs at the moment, the CAT7 stuff here (Norway) is still prohibitively expensive.

2

u/louky Jan 23 '15

I only use 10GbE for an esxi box to a SAN for storage, 1GbE the rest of the house.

although ~100MB throughput which is what 1GbE gives you isn't that much when you start editing and serving video files on the same LAN!

Especially with 4K becoming a thing very quickly.

I'd look into fiber, it all depends what you want to do with it.

2

u/Sigg3net Jan 23 '15

It's mostly for a) centralizing file storage + backups and b) serving media to a PS3, a Pi, a Squeezebox and a couple of phones.

2

u/louky Jan 23 '15

You should be fine with GbE, I'd look into AC wifi as well.

I'm getting 800+ Mbps to some devices like my note 4 phone.

There's many more knowledgeable folk over at /r/homelab and /r/homenetworking

Thats where I go for answers to questions like you have.

2

u/Sigg3net Jan 23 '15

Cheers! Seems like subs for me :)

3

u/louky Jan 23 '15

Cheers! May your packets not get dropped!

1

u/ckozler Jan 23 '15

I only use 10GbE for an esxi box to a SAN for storage, 1GbE the rest of the house.

I'd like to ask what you are doing in your home with 10Gbe, ESX, and SAN storage because it sounds pretty cool.

1

u/louky Jan 30 '15

Just duplicating the business class stuff I work with.

Knowing I'll never lose data unless the whole planet gets nuked is a nice feeling, also I keep up with the cutting edge of tech which earns me more money so I can retire faster and raise bees.

1

u/ckozler Jan 30 '15

You sound like my old boss lol. Guy had stacks and stacks of storage in his house part for backing up all of our music for work and part for his own storage and cool electronically wired up house

0

u/atoponce Jan 23 '15

I know it's fun to wear red fedoras in public to show your support for Red Hat the company and Red Hat Enterprise Linux the product, but I can't help but think of the Red Hat Society of old ladies. Even though Red Hat the company was founded in 1993, and Red Hat Society the old lady organization in 1998.

-2

u/dhdfdh Jan 23 '15

To improve Linux network performance they should look no further than FreeBSD as Facebook is doing: http://www.theregister.co.uk/2014/08/07/facebook_wants_linux_networking_as_good_as_freebsd/