r sr Ptr - - PowerPoint PPT Presentation

❲❛❧❚✿ ❆ ❘❡♣r♦❞✉❝✐❜❧❡ ❘❡s❡❛r❝❤ P❧❛t❢♦r♠ ❢♦r ◆❡t✇♦r❦s ❛♥❞ ❉✐str✐❜✉t❡❞ ❉❛t❛

❊t✐❡♥♥❡ ❉✉❜❧é ✭▲■● ✴ ❈◆❘❙✮✱ ❋r❛♥❝❦ ❘♦✉ss❡❛✉ ✭▲■● ✴ ●r❡♥♦❜❧❡ ■◆P✮ ❛♥❞ ❉r❛❦❦❛r t❡❛♠ ♦❢ ▲■● ❧❛❜

• r❡♥♦❜❧❡✱ ❋❡❜r✉❛r② ✷✵✷✵

❲❛❧❚ ❢♦r r❡❛❧✳✳✳ ❚❤✐s ✐s ❛ t②♣✐❝❛❧ ✇✐r❡❧❡ss ♥❡t✇♦r❦ ❡①♣❡r✐♠❡♥t✦ ❀✮

❆❣❡♥❞❛

▼♦t✐✈❛t✐♦♥ ❙❛♠♣❧❡ ✉s❡ ❝❛s❡ ❆r❝❤✐t❡❝t✉r❡ ❲❛❧❚ ✉♥❞❡r t❤❡ ❤♦♦❞ ◆❡✇s✱ ❖♥✲❣♦✐♥❣ ✇♦r❦ ❛♥❞ P❡rs♣❡❝t✐✈❡s

❊①✐st✐♥❣ ♣❧❛t❢♦r♠s

▲❛r❣❡ s❝❛❧❡ t❡st❜❡❞s ✭❡✳❣✳ ■♦❚✲▲❛❜✮

• ▲✐♠✐t❡❞ ❤❛r❞✇❛r❡ ❝❤♦✐❝❡
• ❙t❛t✐❝ ❡♥✈✐r♦♥♠❡♥t ✫ ♥❡t✇♦r❦ t♦♣♦❧♦❣②
• ◆♦ ♣❤②s✐❝❛❧ ❛❝❝❡ss ✭❢♦r ❞❡❜✉❣❣✐♥❣✮
• ❇♦♦❦✐♥❣ s②st❡♠ s♦♠❡t✐♠❡s ❝r♦✇❞❡❞

❍❛♥❞♠❛❞❡ ♣❧❛t❢♦r♠ ✏♦♥ ②♦✉r ♦✇♥ ❞❡s❦✑

• ❉♦❡s ♥♦t s❝❛❧❡
• ■s ❤❛r❞❧② r❡♣r♦❞✉❝✐❜❧❡

✶

❲❛❧❚ ♣❧❛t❢♦r♠ ♦❜❥❡❝t✐✈❡s

❲❛❧❚ st❛♥❞s ❤❛❧❢✇❛② ❜❡t✇❡❡♥ t❤♦s❡ ✷ ❝❛t❡❣♦r✐❡s✳ ❏✉st ❛s ❛ ❤❛♥❞♠❛❞❡ ♣❧❛t❢♦r♠✱

• ❲❛❧❚ ❝❛♥ ❜❡ ❧✐❣❤t✇❡✐❣❤t ✭❜❛❝❦♣❛❝❦✲❝♦♠♣❛t✐❜❧❡✱ ❢♦r ❛ ❞❡♠♦✮
• ❨♦✉ ❝❛♥ ❜✉✐❧❞ s❡✈❡r❛❧ ✐♥st❛♥❝❡s ♦❢ ❲❛❧❚
• ❨♦✉ ❝❛♥ s❡t ✉♣ ♦♥❡ ♦♥ ②♦✉r ❞❡s❦ ✭❢♦r ❞❡❜✉❣❣✐♥❣✮
• ❨♦✉ ❝❛♥ ❡❛s✐❧② ♠♦✈❡ ♥♦❞❡s ✭❈P❙✱ ✇✐r❡❧❡ss ♥❡t✇♦r❦s✮

❏✉st ❛s ❛ ❧❛r❣❡✲s❝❛❧❡ ♣❧❛t❢♦r♠✱

• ❨♦✉ ❝❛♥ ♠❛❦❡ ✐t ❜✐❣❣❡r ✭②♦✉ ❝❛♥ ❞❡♣❧♦② ✐t ✐♥ ❛ ❜✉✐❧❞✐♥❣✮
• ■t ✐s ❡❛s② t♦ ✉s❡

✷

❲❛❧❚ ♣r♦❥❡❝t ♦❜❥❡❝t✐✈❡s

❲❡ ♣r♦✈✐❞❡✿

• ❖♣❡♥ s♦✉r❝❡ ❝♦❞❡
• ■♥st❛❧❧❛t✐♦♥ ✐♠❛❣❡s
• ❉♦❝✉♠❡♥t❛t✐♦♥ ✭❤♦✇ t♦ ✐♥st❛❧❧ ❛♥❞ ✉s❡✮
• ❙✉♣♣♦rt ✭✇❛❧t✲✉s❡rs❅✉♥✐✈✲❣r❡♥♦❜❧❡✲❛❧♣❡s✳❢r✮

❲❡ ❞♦ ♥♦t ♣r♦✈✐❞❡✿

• ❆ ♣✉❜❧✐❝❧② ❛✈❛✐❧❛❜❧❡ ♣❧❛t❢♦r♠ ✭②♦✉ s❤♦✉❧❞ ❜✉✐❧❞ ②♦✉r ♦✇♥✮

✸

❆❣❡♥❞❛

▼♦t✐✈❛t✐♦♥ ❙❛♠♣❧❡ ✉s❡ ❝❛s❡ ❆r❝❤✐t❡❝t✉r❡ ❲❛❧❚ ✉♥❞❡r t❤❡ ❤♦♦❞ ◆❡✇s✱ ❖♥✲❣♦✐♥❣ ✇♦r❦ ❛♥❞ P❡rs♣❡❝t✐✈❡s

❙❛♠♣❧❡ ✉s❡ ❝❛s❡

Bob

Is it still working with interference?

✹

❙❛♠♣❧❡ ✉s❡ ❝❛s❡

Bob Bob's images John's images

WalT image rpi-wifi

I will test with WalT.

✹

❙❛♠♣❧❡ ✉s❡ ❝❛s❡

Bob Bob's images John's images

WalT image rpi-wifi

OS on nodes should support wifi...

✹

❙❛♠♣❧❡ ✉s❡ ❝❛s❡

Bob Bob's images John's images

WalT image rpi-wifi

> walt image search wifi

✹

❙❛♠♣❧❡ ✉s❡ ❝❛s❡

Bob Bob's images John's images

WalT image rpi-wifi

> walt image search wifi hub:john/rpi-wifi >

✹

❙❛♠♣❧❡ ✉s❡ ❝❛s❡

Bob Bob's images John's images

WalT image rpi-wifi

> walt image search wifi hub:john/rpi-wifi > rpi-wifi... An image of John... Let's start from this!

✹

❙❛♠♣❧❡ ✉s❡ ❝❛s❡

Bob Bob's images John's images

WalT image rpi-wifi

> walt image search wifi hub:john/rpi-wifi > walt image clone hub:john/rpi-wifi

✹

❙❛♠♣❧❡ ✉s❡ ❝❛s❡

Bob Bob's images John's images

WalT image rpi-wifi

> walt image search wifi hub:john/rpi-wifi > walt image clone hub:john/rpi-wifi

✹

❙❛♠♣❧❡ ✉s❡ ❝❛s❡

Bob Bob's images John's images

WalT image rpi-wifi

> walt image search wifi hub:john/rpi-wifi > walt image clone hub:john/rpi-wifi done. >

✹

❙❛♠♣❧❡ ✉s❡ ❝❛s❡

Bob Bob's images John's images

WalT image rpi-wifi

I will copy my experiment script in the image.

SH

>

✹

❙❛♠♣❧❡ ✉s❡ ❝❛s❡

Bob Bob's images John's images

WalT image rpi-wifi

SH

> walt image cp \ communicate.sh rpi-wifi:/bin

✹

❙❛♠♣❧❡ ✉s❡ ❝❛s❡

Bob Bob's images John's images

WalT image rpi-wifi

SH

> walt image cp \ communicate.sh rpi-wifi:/bin

SH

✹

❙❛♠♣❧❡ ✉s❡ ❝❛s❡

Bob Bob's images John's images

WalT image rpi-wifi

SH

> walt image cp \ communicate.sh rpi-wifi:/bin done. >

✹

❙❛♠♣❧❡ ✉s❡ ❝❛s❡

Bob Bob's images John's images

WalT image rpi-wifi

3 of the nodes will run a traffic generator. >

✹

❙❛♠♣❧❡ ✉s❡ ❝❛s❡

Bob Bob's images John's images

WalT image rpi-wifi

> walt image shell rpi-wifi

✹

❙❛♠♣❧❡ ✉s❡ ❝❛s❡

Bob Bob's images John's images

WalT image rpi-wifi

> walt image shell rpi-wifi rpi-wifi$

✹

❙❛♠♣❧❡ ✉s❡ ❝❛s❡

Bob Bob's images John's images

WalT image rpi-wifi

> walt image shell rpi-wifi rpi-wifi$ apt-get install ... rpi-wifi$ vi /bin/disturb.sh rpi-wifi$ exit

✹

❙❛♠♣❧❡ ✉s❡ ❝❛s❡

Bob Bob's images John's images

WalT image rpi-wifi

> walt image shell rpi-wifi rpi-wifi$ apt-get install ... rpi-wifi$ vi /bin/disturb.sh rpi-wifi$ exit Save image as:

✹

❙❛♠♣❧❡ ✉s❡ ❝❛s❡

Bob Bob's images John's images

WalT image rpi-wifi

> walt image shell rpi-wifi rpi-wifi$ apt-get install ... rpi-wifi$ vi /bin/disturb.sh rpi-wifi$ exit Save image as: rpi-wifi-dist

✹

❙❛♠♣❧❡ ✉s❡ ❝❛s❡

Bob Bob's images John's images

WalT image rpi-wifi

>

✹

❙❛♠♣❧❡ ✉s❡ ❝❛s❡

Bob Bob's images John's images

WalT image rpi-wifi

> OK... We're ready to deploy.

✹

❙❛♠♣❧❡ ✉s❡ ❝❛s❡

Bob Bob's images John's images

WalT image rpi-wifi

> walt node boot rpi1,rpi2 \ rpi-wifi

✹

❙❛♠♣❧❡ ✉s❡ ❝❛s❡

Bob Bob's images John's images

WalT image rpi-wifi

> walt node boot rpi1,rpi2 \ rpi-wifi

✹

❙❛♠♣❧❡ ✉s❡ ❝❛s❡

Bob Bob's images John's images

WalT image rpi-wifi

> walt node boot rpi1,rpi2 \ rpi-wifi > walt node boot rpi3,rpi4,rpi5 \ rpi-wifi-dist

✹

❙❛♠♣❧❡ ✉s❡ ❝❛s❡

Bob Bob's images John's images

WalT image rpi-wifi

> walt node boot rpi1,rpi2 \ rpi-wifi > walt node boot rpi3,rpi4,rpi5 \ rpi-wifi-dist

✹

❙❛♠♣❧❡ ✉s❡ ❝❛s❡

Bob Bob's images John's images

WalT image rpi-wifi

> Let's run the experiment scripts...

✹

❙❛♠♣❧❡ ✉s❡ ❝❛s❡

Bob Bob's images John's images

WalT image rpi-wifi

> walt node run rpi3,rpi4,rpi5 \ /bin/disturb.sh > walt node run rpi1,rpi2 \ /bin/communicate.sh

✹

❙❛♠♣❧❡ ✉s❡ ❝❛s❡

Bob Bob's images John's images

WalT image rpi-wifi

> What about the logs?

✹

❙❛♠♣❧❡ ✉s❡ ❝❛s❡

Bob Bob's images John's images

WalT image rpi-wifi

> walt log show --realtime

✹

❙❛♠♣❧❡ ✉s❡ ❝❛s❡

Bob Bob's images John's images

WalT image rpi-wifi

> walt log show --realtime 08:45:23 rpi1 wifi-test Connected.

✹

❙❛♠♣❧❡ ✉s❡ ❝❛s❡

Bob Bob's images John's images

WalT image rpi-wifi

> walt log show --realtime 08:45:23 rpi1 wifi-test Connected. 08:56:12 rpi2 wifi-test DONE. SEE: 08:56:12 rpi2 wifi-test tmp/res.csv

CSV

✹

❙❛♠♣❧❡ ✉s❡ ❝❛s❡

Bob Bob's images John's images

WalT image rpi-wifi

CSV

That's it. rpi2 compiled its results in a csv file. > walt log show --realtime 08:45:23 rpi1 wifi-test Connected. 08:56:12 rpi2 wifi-test DONE. SEE: 08:56:12 rpi2 wifi-test tmp/res.csv ^C

✹

❙❛♠♣❧❡ ✉s❡ ❝❛s❡

Bob Bob's images John's images

WalT image rpi-wifi

CSV

> Let's retrieve this file.

✹

❙❛♠♣❧❡ ✉s❡ ❝❛s❡

Bob Bob's images John's images

WalT image rpi-wifi

CSV

> walt node cp rpi2:/tmp/res.csv .

✹

❙❛♠♣❧❡ ✉s❡ ❝❛s❡

Bob Bob's images John's images

WalT image rpi-wifi

CSV

> walt node cp rpi2:/tmp/res.csv . done. >

CSV

✹

❙❛♠♣❧❡ ✉s❡ ❝❛s❡

Bob Bob's images John's images

WalT image rpi-wifi

CSV

> walt node cp rpi2:/tmp/res.csv . done. >

CSV

Let's plot this.

✹

❙❛♠♣❧❡ ✉s❡ ❝❛s❡

Bob Bob's images John's images

WalT image rpi-wifi

CSV CSV

> gnuplot

✹

❙❛♠♣❧❡ ✉s❡ ❝❛s❡

Bob Bob's images John's images

WalT image rpi-wifi

CSV CSV

> gnuplot gnuplot>

✹

❙❛♠♣❧❡ ✉s❡ ❝❛s❡

Bob Bob's images John's images

WalT image rpi-wifi

CSV CSV

> gnuplot gnuplot> plot "res.csv" using ...

✹

❙❛♠♣❧❡ ✉s❡ ❝❛s❡

Bob Bob's images John's images

WalT image rpi-wifi

CSV CSV

> gnuplot gnuplot> plot "res.csv" using ... gnuplot> Interference Throughput

✹

❙❛♠♣❧❡ ✉s❡ ❝❛s❡

Bob Bob's images John's images

WalT image rpi-wifi

CSV

> gnuplot gnuplot> plot "res.csv" using ... gnuplot> Interference Throughput Not bad! Throughput remains high.

✹

❙❛♠♣❧❡ ✉s❡ ❝❛s❡

Bob Bob's images John's images

WalT image rpi-wifi

CSV

> Let's publish the images needed for this experiment.

✹

❙❛♠♣❧❡ ✉s❡ ❝❛s❡

Bob Bob's images John's images

WalT image rpi-wifi

CSV

> It will allow anyone to reproduce it.

✹

❙❛♠♣❧❡ ✉s❡ ❝❛s❡

Bob Bob's images John's images

WalT image rpi-wifi

CSV

> > walt image publish rpi-wifi

✹

❙❛♠♣❧❡ ✉s❡ ❝❛s❡

Bob Bob's images John's images

WalT image rpi-wifi

CSV

> > walt image publish rpi-wifi

Publish images

✹

❙❛♠♣❧❡ ✉s❡ ❝❛s❡

Bob Bob's images John's images

WalT image rpi-wifi

CSV

>

Publish images

> walt image publish rpi-wifi done. >

Bob's images

WalT image rpi-wifi

✹

❙❛♠♣❧❡ ✉s❡ ❝❛s❡

Bob Bob's images John's images

WalT image rpi-wifi

CSV

>

Publish images

Bob's images

WalT image rpi-wifi

> walt image publish rpi-wifi done. > walt image publish rpi-wifi-dist

✹

❙❛♠♣❧❡ ✉s❡ ❝❛s❡

Bob Bob's images John's images

WalT image rpi-wifi

CSV

>

Publish images

Bob's images

WalT image rpi-wifi

> walt image publish rpi-wifi done. > walt image publish rpi-wifi-dist done. >

WalT image rpi-wifi-dist

✹

❙❛♠♣❧❡ ✉s❡ ❝❛s❡

Bob Bob's images John's images

WalT image rpi-wifi

CSV

>

Publish images

Bob's images

WalT image rpi-wifi

> walt image publish rpi-wifi done. > walt image publish rpi-wifi-dist done. >

WalT image rpi-wifi-dist

✹

❆❣❡♥❞❛

▼♦t✐✈❛t✐♦♥ ❙❛♠♣❧❡ ✉s❡ ❝❛s❡ ❆r❝❤✐t❡❝t✉r❡ ❲❛❧❚ ✉♥❞❡r t❤❡ ❤♦♦❞ ◆❡✇s✱ ❖♥✲❣♦✐♥❣ ✇♦r❦ ❛♥❞ P❡rs♣❡❝t✐✈❡s

❲❤❛t ✐s ❛ ❲❛❧❚ ♥♦❞❡❄

• ❍✐st♦r✐❝❛❧❧②✱ ❛ ❲❛❧❚ ♥♦❞❡ ✇❛s ❛

❙✐♥❣❧❡✲❇♦❛r❞✲❈♦♠♣✉t❡r✶ ♣r❡❢❡r❛❜❧② ♣♦✇❡r❡❞ t❤r♦✉❣❤ P♦❊

• ■ts ❖❙ ✐s ❛ ✧❲❛❧❚ ✐♠❛❣❡✧ s❤❛r❡❞ ❢r♦♠ t❤❡

s❡r✈❡r t❤r♦✉❣❤ ❚❋❚P✴◆❋❙ ✷ ❝❛s❡s✿ ✶✳ ❲❛❧❚ ♥♦❞❡s r✉♥ t❤❡ ❡①♣❡r✐♠❡♥t✱ ♦r ✷✳ ❲❛❧❚ ♥♦❞❡s ❝♦♥tr♦❧ t❤❡ t❛r❣❡t ❞❡✈✐❝❡s ♦❢ t❤❡ ❡①♣❡r✐♠❡♥t ✭❡✳❣✳✱ ❙❚ s❡♥s♦r ❜♦❛r❞ ✐♥ t❤❡ ♣✐❝t✉r❡✮

✶❖✉r ❝✉rr❡♥t ✈❡rs✐♦♥ s✉♣♣♦rts ❘❛s♣❜❡rr② P✐ ❇✱ ❇✰✱ ✷❇✱ ✸❇ ❛♥❞ ✸❇✰✳

✺

❲❤❛t ✐s ❛ ❲❛❧❚ ♥♦❞❡❄

❲❛❧❚ ♥♦✇ s✉♣♣♦rts ♦t❤❡r ❦✐♥❞s ♦❢ ♥♦❞❡s✿

• ❆♥② P❈ ❝❛♥ ❜❡❝♦♠❡ ❛ ❲❛❧❚ ♥♦❞❡✱

❜② ❜♦♦t✐♥❣ ❛ ❯❙❇ st✐❝❦ ✢❛s❤❡❞ ❛♣♣r♦♣r✐❛t❡❧②

• ❖♥❡ ❝❛♥ ❛❧s♦ ❝r❡❛t❡ ✈✐rt✉❛❧ ♥♦❞❡s ✭❦✈♠✮

✻

❲❛❧❚ ♣❧❛t❢♦r♠ ♥❡t✇♦r❦

◆❡t✇♦r❦ ✐s♦❧❛t✐♦♥

• ❲❛❧❚ ✇✐r❡❞ ♥❡t✇♦r❦ ✐s ✐s♦❧❛t❡❞ ❢r♦♠ ✐♥t❡r♥❡t ❜② ❞❡❢❛✉❧t✳

✭→ ✐♠♣r♦✈❡ r❡♣r♦❞✉❝✐❜✐❧✐t②✮

• ■❢ ✐t✬s ♥❡❡❞❡❞✱ ✇❛❧t ♥♦❞❡ ♥❡ts❡t✉♣ ❝♦♠♠❛♥❞ ❝❛♥ st✐❧❧ t♦❣❣❧❡

◆❆❚ ♠♦❞❡ ♦♥ ❛ ♥♦❞❡✱ t♦ ❛❧❧♦✇ ✐♥t❡r♥❡t ❛❝❝❡ss✳ ❱P◆ ❛♥❞ ❞✐st❛♥t ♥♦❞❡s

• ❲❡ ❛r❡ ❝✉rr❡♥t❧② ✐♥t❡❣r❛t✐♥❣ s♦❢t✇❛r❡ s✉♣♣♦rt ❢♦r ❞✐st❛♥t ♥♦❞❡s

✭❝❢✳ ▲♦❘❛✱ ❙✐❣❋♦①✮✳

• ❚❤❡s❡ ♥♦❞❡s ✇✐❧❧ r❡❛❝❤ ❲❛❧❚ ♥❡t✇♦r❦ t❤r♦✉❣❤ ❛ ❱P◆

✭✰ ❛ ❧❡✈❡❧ ♦❢ ✈✐rt✉❛❧✐③❛t✐♦♥ t♦ ✐♠♣❧❡♠❡♥t ♥❡t✇♦r❦ ❜♦♦t ♣r♦❝❡❞✉r❡✮

✼

❚❤❡ r❡♣r♦❞✉❝✐❜❧❡ ♣❧❛t❢♦r♠ ❝♦♥❝❡♣t

❲❛❧❚ ✐s ❛ r❡♣r♦❞✉❝✐❜❧❡ ♣❧❛t❢♦r♠✶

• ❆♥② r❡s❡❛r❝❤❡r ❝❛♥ ❜✉✐❧❞ ✐ts ♦✇♥ ❲❛❧❚ ♣❧❛t❢♦r♠
• ✳✳✳ ♦r s❡✈❡r❛❧ ♣❧❛t❢♦r♠s ♦❢ ✈❛r✐♦✉s s❝❛❧❡s

✭❡✳❣✳✱ ♦♥❡ ❢♦r ❞❡❜✉❣❣✐♥❣✱ ♦♥❡ ❢♦r ❡①♣❡r✐♠❡♥ts✮

✶P✳ ❇r✉♥✐s❤♦❧③✱ ❊✳ ❉✉❜❧❡✱ ❋✳ ❘♦✉ss❡❛✉✱ ❛♥❞ ❆✳ ❉✉❞❛✱ ✏❲❛❧❚✿ ❆ ❘❡♣r♦❞✉❝✐❜❧❡ ❚❡st❜❡❞

❢♦r ❘❡♣r♦❞✉❝✐❜❧❡ ◆❡t✇♦r❦ ❊①♣❡r✐♠❡♥ts✑✱ ✐♥ Pr♦❝✳ ♦❢ t❤❡ ■♥t❡r♥❛t✐♦♥❛❧ ❲♦r❦s❤♦♣ ♦♥ ❈♦♠♣✉t❡r ❛♥❞ ◆❡t✇♦r❦✐♥❣ ❊①♣❡r✐♠❡♥t❛❧ ❘❡s❡❛r❝❤ ❯s✐♥❣ ❚❡st❜❡❞s✱ ✷✵✶✻✳

✽

❙❛♠♣❧❡ ♠♦❜✐❧❡ s❡t✉♣

WalT Server Node Node PoE Switch User laptop ▼✐♥✐♠❛❧ s❡t✉♣ ❢♦r ❛♥ ❆◆❘ ❉❛t❛t✇❡❡t ♠❡❡t✐♥❣

✾

❲❛❧❚ ✈❡rs❛t✐❧✐t② s❤♦✇♥ ✐♥ t✇♦ s❧✐❞❡s ✭✶✮

❆ ♥♦❞❡ ♦❢ t❤❡ ❲❛❧❚ ♥❡t✇♦r❦ ✐♥ ■▼❆● ❜✉✐❧❞✐♥❣

✶✵

❲❛❧❚ ✈❡rs❛t✐❧✐t② s❤♦✇♥ ✐♥ t✇♦ s❧✐❞❡s ✭✷✮

❘❡✉s✐♥❣ t❤❡ s❛♠❡ ✇❛❧❧ ♣❧✉❣ ❢♦r t❡♠♣♦r❛r② ❧♦✇✲❧❡✈❡❧ ❞❡❜✉❣❣✐♥❣

✶✶

❆r❝❤✐t❡❝t✉r❡ ❢♦r ❲❙◆s

✶✷

❆r❝❤✐t❡❝t✉r❡ ❢♦r ❲❙◆s

■♥ t❤✐s ❝❛s❡✿

• ❲❡ ✇❛♥t t♦ ♠♦♥✐t♦r s❡♥s♦r ♥♦❞❡s
• ❲❛❧❚ ♥♦❞❡s ❛r❡ ✏❝♦♥tr♦❧❧❡r ♥♦❞❡s✑

✭❡✳❣✳✱ ✢❛s❤ s❡♥s♦r ♥♦❞❡s✱ s❛✈❡ ❧♦❣s✱ ❞❡❜✉❣ ✉s✐♥❣ t❤❡ s❡r✐❛❧ ❧✐♥❦✮

• ❆ ❲❛❧❚ ✐♠❛❣❡ ♣r♦✈✐❞❡s t❤✐s s✉♣♣♦rt

✶✸

❱✐③❲❛❧t

• ❆ ❈♦♦❥❛ s✐♠✉❧❛t♦r ♣❧✉❣✐♥
• ■t ♠❛❦❡s ❈♦♦❥❛ s❤♦✇ t❤❡

❜❡❤❛✈✐♦r ♦❢ r❡❛❧ s❡♥s♦r ♥♦❞❡s ✭✐♥st❡❛❞ ♦❢ s✐♠✉❧❛t✐♥❣✮

• ■♥♣✉t✿ ❧♦❣s ❝♦♠✐♥❣ ❢r♦♠ s❡♥s♦r

♥♦❞❡s

• ❱✐③❲❛❧❚ ✈✐s✉❛❧✐③❡s ✇❤❛t✬s

❤❛♣♣❡♥✐♥❣ ✐♥ t❤❡ ♥❡t✇♦r❦✱ ✐♥ r❡❛❧ t✐♠❡ ♦r ♣♦st ♠♦rt❡♠

✶✹

❆❣❡♥❞❛

▼♦t✐✈❛t✐♦♥ ❙❛♠♣❧❡ ✉s❡ ❝❛s❡ ❆r❝❤✐t❡❝t✉r❡ ❲❛❧❚ ✉♥❞❡r t❤❡ ❤♦♦❞ ◆❡✇s✱ ❖♥✲❣♦✐♥❣ ✇♦r❦ ❛♥❞ P❡rs♣❡❝t✐✈❡s

◆♦❞❡ ❜♦♦t ♣r♦❝❡❞✉r❡

boot

8

WalT server

IP?

1

(dhcp.vci=walt.node.rpi-2-b) IP: 192.168.152.9

2

[image]/boot/rpi-2-b/start.uboot

4 3

/start.uboot TFTP: ? run start.uboot

5

[image]/boot/rpi-2-b/kernel.img

7 6 TFTP: ?

/kernel.img NFS mount on:

9

[image]/ ✶✺

◆❋❙ r❡♠✐♥❞❡r

• ◆❋❙✿ ◆❡t✇♦r❦ ❋✐❧❡ ❙②st❡♠
• ❆❧❧♦✇s t♦ ❡①♣♦s❡ ❧♦❝❛❧❧② ❛ ✈✐❡✇ ♦❢ t❤❡ ✜❧❡s st♦r❡❞ ❡❧s❡✇❤❡r❡
• ❊❛❝❤ ❛❝❝❡ss t♦ ❛ ✜❧❡ ✐s tr❛♥s❧❛t❡❞ ✐♥t♦ ❛ r❡q✉❡st✲r❡s♣♦♥s❡

t♦ ◆❋❙ s❡r✈❡r

• ❈♦♠♣❛r✐s♦♥✿

▲♦❝❛❧ ✜❧❡ s②st❡♠✿ r❡q✉❡sts ❣♦ t♦ ❞✐s❦ ❝♦♥tr♦❧❧❡r ◆❡t✇♦r❦ ✜❧❡ s②st❡♠✿ r❡q✉❡sts ❣♦ t♦ r❡♠♦t❡ s❡r✈❡r

• ❈♦♥s❡q✉❡♥❝❡✿ ❲❛❧❚ ✐♠❛❣❡s st❛② ♦♥ t❤❡ s❡r✈❡r✳

❆ ❲❛❧❚ ✐♠❛❣❡ ✐s ♥❡✈❡r tr❛♥s❢❡r❡❞ ❛s ❛ ✇❤♦❧❡ t♦ t❤❡ ♥♦❞❡✳

✶✻

◆♦❞❡ ❜♦♦t ♣r♦❝❡❞✉r❡ ✭❝♦♥t✐♥✉❡❞✮

WalT server

10

NFS mount on: [image]/

9

Create an overlay in RAM: / = UNION(nfs:[image]/,ram:<tmp>)

=> file modifications stored in RAM => can remain read-only

nfs:[image]

11 Start walt-specific services 12 Start the rest of the OS:

[image]/sbin/init (e.g. reboot service)

✶✼

◆♦❞❡ ❜♦♦t ♣r♦❝❡❞✉r❡ ✭❝♦♥t✐♥✉❡❞✮

❇❡♥❡✜ts ♦❢ t❤✐s ❜♦♦t ♣r♦❝❡❞✉r❡✿

• ❲❛❧❚ ✐♠❛❣❡s ❡♠❜❡❞ ❛ ❦❡r♥❡❧✱ ❛♥ ❖❙ ✜❧❡s②st❡♠✱ ❜♦♦t❧♦❛❞❡r s❝r✐♣ts✿

t❤❡ ✇❤♦❧❡ s♦❢t✇❛r❡ st❛❝❦ ❝❛♥ ❜❡ ❝✉st♦♠✐③❡❞✳

• ❚❤❡ ❙❉ ❝❛r❞ ♦❢ ❛ ♥♦❞❡ ❥✉st ❝♦♥t❛✐♥s ❛ ♥❡t✇♦r❦ ❜♦♦t❧♦❛❞❡r✿

❂❃ ■t r❡♠❛✐♥s r❡❛❞✲♦♥❧② ✭t❤✐s ❡♥s✉r❡s r♦❜✉st♥❡ss ♦✈❡r t✐♠❡✮

• ◆♦❞❡s ❛r❡ ❝♦♠♣❧❡t❡❧② st❛t❡❧❡ss✿
• ❆t ❡❛❝❤ r❡❜♦♦t✱ t❤❡② ❥✉st ❞♦✇♥❧♦❛❞ ✴st❛rt✳✉❜♦♦t ❛♥❞ r✉♥ ✐t

✭t❤❡ s❡r✈❡r ♠❛✐♥t❛✐♥s r❡❞✐r❡❝t✐♦♥s t♦ t❤❡ s❡❧❡❝t❡❞ ✇❛❧t ✐♠❛❣❡✮

• ❋✐❧❡ ♠♦❞✐✜❝❛t✐♦♥s ✭st♦r❡❞ ✐♥ ❘❆▼✮ ❛r❡ ❧♦st ♦♥ r❡❜♦♦t✿

✇❤❡♥ ❜♦♦t✐♥❣ t❤❡ s❛♠❡ ✐♠❛❣❡✱ ❖❙ r❡st❛rts ❡①❛❝t❧② t❤❡ s❛♠❡ ✭t❤✐s ❡♥s✉r❡s r❡♣r♦❞✉❝✐❜✐❧✐t②✮

✶✽

❚❡❝❤♥✐❝❛❧ ❤✐❣❤❧✐❣❤ts

❖t❤❡r t❡❝❤♥✐❝❛❧ ❤✐❣❤❧✐❣❤ts✿

• ✧✇❛❧t ✐♠❛❣❡ s❤❡❧❧✧ ❝♦♠♠❛♥❞✿
• Pr♦✈✐❞❡s ❛ s❤❡❧❧ s❡ss✐♦♥ r♦♦t❡❞ ✐♥s✐❞❡ t❤❡ ✐♠❛❣❡
• ❆❧❧♦✇s t♦ ♠♦❞✐❢② ❛♥ ❡①✐st✐♥❣ ✐♠❛❣❡ ✈❡r② ❡❛s✐❧②
• ❇❡❤✐♥❞ t❤❡ s❝❡♥❡s✱ ❛ ❞♦❝❦❡r ❝♦♥t❛✐♥❡r ✐s ❝r❡❛t❡❞ ♦♥ s❡r✈❡r
• ❚r❛♥s♣❛r❡♥t ❝r♦ss✲❈P❯✲❛r❝❤✐t❡❝t✉r❡ ✐s ❤❛♥❞❧❡❞ ✉s✐♥❣ q❡♠✉
• ✧✇❛❧t ♥♦❞❡ ❜♦♦t✧ ❝♦♠♠❛♥❞✿
• ❊①♣♦s❡s t❤❡ ❝♦♥t❡♥t ♦❢ ❛ ❞♦❝❦❡r ✐♠❛❣❡ ❛s ❛♥ ◆❋❙ s❤❛r❡
• ▲❡ts t❤❡ ♥♦❞❡✭s✮ ❜♦♦t ✐t
• ■♥ s❤♦rt✱ t❤✐s ✐♥st❛♥t❧② t✉r♥s ❛ ✈✐rt✉❛❧ ✐♠❛❣❡ ✐♥t♦ ❛ r❡❛❧ ❞❡♣❧♦②♠❡♥t✳

✶✾

❆❣❡♥❞❛

▼♦t✐✈❛t✐♦♥ ❙❛♠♣❧❡ ✉s❡ ❝❛s❡ ❆r❝❤✐t❡❝t✉r❡ ❲❛❧❚ ✉♥❞❡r t❤❡ ❤♦♦❞ ◆❡✇s✱ ❖♥✲❣♦✐♥❣ ✇♦r❦ ❛♥❞ P❡rs♣❡❝t✐✈❡s

❘❡❝❡♥t ♥❡✇s

❘❡❝❡♥t ♥❡✇s

• ❙❝❤♥❡✐❞❡r ❊❧❡❝tr✐❝ ❤❛s ❜✉✐❧t ❛ ❞❡♠♦♥str❛t♦r ❜❛s❡❞ ♦♥ ❲❛❧❚ ✭✇✐t❤

♦✉r ❤❡❧♣✮

• ❖t❤❡r ♣❧❛t❢♦r♠s ❤❛✈❡ ❜❡❡♥ s❡t✉♣ ✭▲②♦♥✱ ■st❛♥❜✉❧✮
• ❲❛❧❚ ✐s ❛❧s♦ ✉s❡❞ ❢♦r ✇✐✜ ❤❛♥❞s✲♦♥ ❛t ●r❡♥♦❜❧❡ ■◆P ❊♥s✐♠❛❣
• ❚❤❡ ❞❡♣❧♦②♠❡♥t ✐♥ ■▼❆● ❜✉✐❧❞✐♥❣ ❛t ▲■● ♥♦✇ ❤❛s ✶✷ ♠♦r❡ ✸❇✰

♥♦❞❡s ♦♥ t❤❡ ❣r♦✉♥❞ ✢♦♦r

• ❲❡ ❝♦♥♥❡❝t❡❞ ♦✉r ❲❛❧❚ ♣❧❛t❢♦r♠ ❛t ■▼❆● t♦ ♦✉r

❞❛t❛ ♠❛♥❛❣❡♠❡♥t ♣❧❛t❢♦r♠ ✭❤tt♣s✿✴✴s❛❦✉r❛✲♣❧❛t❢♦r♠✳❧✐❣❧❛❜✳❢r✴✮

✷✵

❖♥✲❣♦✐♥❣ ✇♦r❦ ❛♥❞ P❡rs♣❡❝t✐✈❡s

❖♥✲❣♦✐♥❣ ♦r ❢♦r t❤❡ ♥❡❛r ❢✉t✉r❡

• ❙❡✈❡r❛❧ ♥❡t✇♦r❦ ❡①♣❡r✐♠❡♥ts ✭❉r❛❦❦❛r t❡❛♠ ❛t ▲■●✮
• P♦ss✐❜❧❡ ♥❡t✇♦r❦ ♠♦♥✐t♦r✐♥❣ ❡①♣❡r✐♠❡♥ts ✐♥ t❤❡ ■▼❆● ❜✉✐❧❞✐♥❣✶
• P❛❝❦❛❣❡ ♥❡①t ♣✉❜❧✐❝ ✈❡rs✐♦♥✱ ♣r♦✈✐❞✐♥❣✿
• ❙✉♣♣♦rt ❢♦r ❞✐st❛♥t ♥♦❞❡s ✭❱P◆✮
• ❙✉♣♣♦rt ❢♦r P②t❤♦♥ ✸
• ✴♣❡rs✐st ♣❡rs✐st❡♥t ❞✐r❡❝t♦r② ♦♥ ❡❛❝❤ ♥♦❞❡
• ❊♥❤❛♥❝❡❞ t❡st ❝♦✈❡r❛❣❡
• ❙✉♣♣♦rt ❢♦r ♥❡✇❡r ❖❙ ❛♥❞ ❞♦❝❦❡r✲r❡❧❛t❡❞ t♦♦❧s

✶✇✐t❤ ●✳ ❊♥❞❡r❧é✱ ➱✳ ❏✉❧❧✐❡♥ ♦❢ ●r❡♥♦❜❧❡ ❯♥✐✈❡rs✐t②

✷✶

• ❡tt✐♥❣ ❤❡❧♣ ♦r ♠♦r❡ ✐♥❢♦r♠❛t✐♦♥
• ❣❡t ❤❡❧♣✿
• r❡❣✐st❡r t♦ t❤❡ ❧✐st✿ ✇❛❧t✲✉s❡rs❅✉♥✐✈✲❣r❡♥♦❜❧❡✲❛❧♣❡s✳❢r
• ♦r ❝❤❡❝❦♦✉t✿ ❤tt♣s✿✴✴✇❛❧t✲♣r♦❥❡❝t✳❧✐❣❧❛❜✳❢r✱

s❡❝t✐♦♥ ✧❘❡s♦✉r❝❡s ❛♥❞ ❉♦❝✉♠❡♥t❛t✐♦♥✧

• ♦r t②♣❡✿ ✇❛❧t ❤❡❧♣ s❤♦✇
• ♦r ❥✉st ❝♦♥t❛❝t ✉s✿
• ❡♠❛✐❧✿ ✇❛❧t✲❝♦♥t❛❝t❅✉♥✐✈✲❣r❡♥♦❜❧❡✲❛❧♣❡s✳❢r

✷✷

❍♦✇ t♦ ❝♦♥tr✐❜✉t❡

• ❙❡t✉♣✶ ❛♥❞ ✉s❡ ②♦✉r ♦✇♥ ♣❧❛t❢♦r♠✱ ❛♥❞
• ❙❤❛r❡ ②♦✉r ❲❛❧❚ ✐♠❛❣❡s ♦♥ t❤❡ ❞♦❝❦❡r ❤✉❜
• ❆❞❞ s✉♣♣♦rt ❢♦r ♥❡✇ ❦✐♥❞s ♦❢ ♥♦❞❡s
• ❘❡♣♦rt ❜✉❣s
• ❉✐s❝✉ss ✇✐t❤ ✉s ♣♦ss✐❜❧❡ ✐♠♣r♦✈❡♠❡♥ts

✶❈♦♥t❛❝t ✉s ✭✇❛❧t✲❝♦♥t❛❝t❅✉♥✐✈✲❣r❡♥♦❜❧❡✲❛❧♣❡s✳❢r✮✱ ✇❡ ✇✐❧❧ ❛ss✐st ②♦✉✳

✷✸

❲❛❧❚ ❝r❡❞✐ts

• ❋✉♥❞✐♥❣
• ❯♥✐✈✳ ●r❡♥♦❜❧❡ ❆❧♣❡s✱ ●r❡♥♦❜❧❡ ■◆P ✴ ❯❏❋✱ ❆●■❘ ❲❛❧❚ ✭✷✵✶✸✲✷✵✶✹✮
• ❆◆❘ ■❘■❙ ✭✷✵✶✶✮
• ❋P✼ ■❈❚ ❈❆▲■P❙❖ ✲ ❈♦♥♥❡❝t ❆❧❧ ■P✲❜❛s❡❞ ❙♠❛rt ❖❜❥❡❝ts ✭✷✵✶✶✮
• ❆◆❘ ❉❛t❛❚✇❡❡t ✭✷✵✶✸✮
• ❚❤❛♥❦s
• P✐❡rr❡ ❇r✉♥✐s❤♦❧③✱ ❇❛♣t✐st❡ ❏♦♥❣❧❡③✱ ◆❛r❡❦ ❉❛✈t②❛♥✱ ❆②♦✉❜ ❇❛r❣❛❝❤✱

▼❡❤♠❡t ❚❛❤✐r ❙❛♥❞✐❦❦❛②❛✱ ◗❛s✐♠ ▲♦♥❡✱ ❚❛❦✇❛ ❆tt✐❛✱ ❲❛❧❚ ✐♠❛❣❡s ❞❡s✐❣♥✱ ❞❡✈❡❧♦♣♠❡♥t✱ t❡st✐♥❣ ✫ ❞♦❝✉♠❡♥t❛t✐♦♥

• ❇❛st✐❡♥ ❋❛✉r❡✱ P✐❡rr❡✲❍❡♥r② ❋r♦❤r✐♥❣✱ ❏♦r❛♥❡ ❈♦♥❣✐♦✲❍♦❧❧❛r❞✱

❈♦s♠✐♥ ◆✐❝❤✐❢♦r✱ ❝♦r❡ ❲❛❧❚

• ❏♦r❣❡ ▲✉✐s ❇❛r❛♥❣✉❛♥ ❈❛str♦✱ ❱✐③❲❛❧❚
• ❍❡♥r✐✲❏♦s❡♣❤ ❆✉❞é♦✉❞✱ ❊❧♦❞✐❡ ▼♦r✐♥✱ ❚✐♠♦t❤② ❈❧❛❡②s✱ ❖♥ss

❇♦✉s❜✐❤✱ t❡st✐♥❣ ❛♥❞ ❞❡♠♦ s❡t✉♣

• ❏♦❛♦ ●✉✐❧❤❡r♠❡ ❩❡♥✐✱ ▼❛t❤❡✉s ❈❛st❛♥❤♦✱ ■❛❝♦❜ ❏✉❝✱ ▲✐✈✐✉ ❱❛r❣❛✱

s❡♥s♦r ✐♥t❡❣r❛t✐♦♥ ✫ ❈♦♥t✐❦✐ ✐♥str✉♠❡♥t❛t✐♦♥

✷✹

◗✉❡st✐♦♥s❄

✷✹