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Commit 95072947 authored by dimitri.lizzi's avatar dimitri.lizzi
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write about protocols benchmarks + graph and table

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doc/Makefile
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...@@ -13,13 +13,13 @@ all: diagrams logbook.md rapport.md rapport.pdf ...@@ -13,13 +13,13 @@ all: diagrams logbook.md rapport.md rapport.pdf
logbook.md: logbook.gpp.md markdown.gpp gitlab-markdown.gpp $(PLANTUML_DIAGRAMS_SVG) $(PLANTUML_DIAGRAMS_PNG) logbook.md: logbook.gpp.md markdown.gpp gitlab-markdown.gpp $(PLANTUML_DIAGRAMS_SVG) $(PLANTUML_DIAGRAMS_PNG)
$(GPP) -DGITLAB_MARKDOWN -DSTANDALONE_LOGBOOK $< | ./trimstart.py > $@ $(GPP) -DGITLAB_MARKDOWN -DSTANDALONE_LOGBOOK $< | ./trimstart.py > $@
rapport.md: rapport.gpp.md logbook.gpp.md markdown.gpp gitlab-markdown.gpp $(PLANTUML_DIAGRAMS_SVG) $(PLANTUML_DIAGRAMS_PNG) rapport.md: rapport.gpp.md logbook.gpp.md markdown.gpp gitlab-markdown.gpp csv2barchart.py $(PLANTUML_DIAGRAMS_SVG) $(PLANTUML_DIAGRAMS_PNG)
$(GPP) -DGITLAB_MARKDOWN $< | ./trimstart.py > $@ $(GPP) -DGITLAB_MARKDOWN $< | ./trimstart.py > $@
rapport.tex: rapport.gpp.md diagrams markdown.gpp pandoc-pdf-markdown.gpp logbook.gpp.md $(PLANTUML_DIAGRAMS_SVG) $(PLANTUML_DIAGRAMS_PNG) rapport.tex: rapport.gpp.md diagrams markdown.gpp pandoc-pdf-markdown.gpp logbook.gpp.md csv2barchart.py $(PLANTUML_DIAGRAMS_SVG) $(PLANTUML_DIAGRAMS_PNG)
$(GPP) -DPANDOC_PDF $< | ./trimstart.py | pandoc --standalone --pdf-engine=xelatex -o $@ $(GPP) -DPANDOC_PDF $< | ./trimstart.py | pandoc --standalone --pdf-engine=xelatex -o $@
rapport.pdf: rapport.gpp.md markdown.gpp pandoc-pdf-markdown.gpp logbook.gpp.md $(PLANTUML_DIAGRAMS_SVG) $(PLANTUML_DIAGRAMS_PNG) rapport.pdf: rapport.gpp.md markdown.gpp pandoc-pdf-markdown.gpp logbook.gpp.md csv2barchart.py $(PLANTUML_DIAGRAMS_SVG) $(PLANTUML_DIAGRAMS_PNG)
$(GPP) -DPANDOC_PDF $< | ./trimstart.py | pandoc --pdf-engine=xelatex -o $@ $(GPP) -DPANDOC_PDF $< | ./trimstart.py | pandoc --pdf-engine=xelatex -o $@
diagrams: $(PLANTUML_DIAGRAMS_SVG) $(PLANTUML_DIAGRAMS_PNG) diagrams: $(PLANTUML_DIAGRAMS_SVG) $(PLANTUML_DIAGRAMS_PNG)
......
doc/charts/chart_protocols.png LFS
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doc/charts/chart_protocols.png

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doc/charts/chart_protocols.svg
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doc/csv2barchart.py
+ 18
− 3
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#!/usr/bin/env python3 #!/usr/bin/env python3
import csv import csv
import re
from sys import stdin, argv from sys import stdin, argv
from typing import TextIO from typing import TextIO
import matplotlib.pyplot as plt import matplotlib.pyplot as plt
def format_value(value):
return re.sub(r'\.0$', '', str(value))
def csv_to_barchart(file: TextIO) -> plt.Figure: def csv_to_barchart(file: TextIO) -> plt.Figure:
next(file) # skip header titles_csv_reader = csv.reader(file, delimiter=';', quoting=csv.QUOTE_ALL)
csv_reader = csv.reader(file, delimiter=';', quoting=csv.QUOTE_NONNUMERIC) (xlabel, ylabel, *other_labels) = next(titles_csv_reader)
print(f'|{xlabel}|{ylabel}|{"".join([f"{label}|" for label in other_labels])}')
print(f'|--|--|{"--|" * len(other_labels)}')
data_csv_reader = csv.reader(file, delimiter=';', quoting=csv.QUOTE_NONNUMERIC)
xs=[] xs=[]
xticks=[] xticks=[]
yticks=[]
ys=[] ys=[]
for (x, (xtick, y)) in enumerate(csv_reader): for (x, (xtick, y, *other_values)) in enumerate(data_csv_reader):
ytick = format_value(y)
print(f'|{xtick}|{ytick}|{"".join([f"{format_value(value)}|" for value in other_values])}')
xs.append(x) xs.append(x)
xticks.append(xtick) xticks.append(xtick)
yticks.append(ytick)
ys.append(y) ys.append(y)
fig = plt.figure() fig = plt.figure()
plt.bar(xs, ys) plt.bar(xs, ys)
plt.xticks(xs, xticks) plt.xticks(xs, xticks)
#plt.yticks(ys, yticks)
plt.xlabel(xlabel)
plt.ylabel(ylabel)
return fig return fig
......
doc/gitlab-markdown.gpp
+ 4
− 0
View file @ 95072947
...@@ -42,3 +42,7 @@ ...@@ -42,3 +42,7 @@
!!content !!content
``` ```
} }
!!define{!!tableheader{ref_id}{description}}{
!!description: <a name="!!ref_id"/>
}
\ No newline at end of file
doc/logbook.gpp.md
+ 2
− 4
View file @ 95072947
...@@ -1764,9 +1764,7 @@ It looks like the bottleneck is effectively the network. ...@@ -1764,9 +1764,7 @@ It looks like the bottleneck is effectively the network.
If 13743592907 bytes were transferred in 120 seconds, we are close to the theorical If 13743592907 bytes were transferred in 120 seconds, we are close to the theorical
bitrate of $1 [Gbps]$, because: bitrate of $1 [Gbps]$, because:
```math !!displaymath{\frac{13743592907 [b]}{120 [s]} = 114529940.892 [bps] = 0.916239528 [Gbps]}
\frac{13743592907 [b]}{120 [s]} = 114529940.892 [bps] = 0.916239528 [Gbps]
```
In practice, the bottleneck will be the network interface of the In practice, the bottleneck will be the network interface of the
server. server.
......
doc/logbook.md
+ 4
− 2
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...@@ -1762,10 +1762,12 @@ It looks like the bottleneck is effectively the network. ...@@ -1762,10 +1762,12 @@ It looks like the bottleneck is effectively the network.
If 13743592907 bytes were transferred in 120 seconds, we are close to the theorical If 13743592907 bytes were transferred in 120 seconds, we are close to the theorical
bitrate of $1 [Gbps]$, because: bitrate of $1 [Gbps]$, because:
```math ```math
\frac{13743592907 [b]}{120 [s]} = 114529940.892 [bps] = 0.916239528 [Gbps] \frac{13743592907 [b]}{120 [s]} = 114529940.892 [bps] = 0.916239528 [Gbps]
``` ```
In practice, the bottleneck will be the network interface of the In practice, the bottleneck will be the network interface of the
server. server.
......
doc/markdown.gpp
+ 6
− 3
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...@@ -23,8 +23,11 @@ EOF-DEFACRONYM-GPP-MACRO ...@@ -23,8 +23,11 @@ EOF-DEFACRONYM-GPP-MACRO
!!define{!!comment}{} !!define{!!comment}{}
!!define{!!barchart{ref_id}{description}{chartdata}}{!!exec{>/dev/null ./csv2barchart.py "charts/!!ref_id.png" "charts/!!ref_id.svg" << 'EOF_BARCHART_MACRO' !!define{!!barchart{chart_ref_id}{table_ref_id}{description}{chart_data}}{
!!chart_data !!tableheader{!!table_ref_id}{Table des !!description}
EOF_BARCHART_MACRO}!!svgref{!!ref_id}{!!description}{charts/!!ref_id}} !!exec{./csv2barchart.py "charts/!!chart_ref_id.png" "charts/!!chart_ref_id.svg" << 'EOF_BARCHART_MACRO'!!chart_data
EOF_BARCHART_MACRO}
!!svgref{!!chart_ref_id}{Graphique des !!description}{charts/!!chart_ref_id}}
!!endif !!endif
\ No newline at end of file
doc/pandoc-pdf-markdown.gpp
+ 5
− 1
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...@@ -29,3 +29,7 @@ ...@@ -29,3 +29,7 @@
!!define{!!inlinemath{content}}{$!!content$} !!define{!!inlinemath{content}}{$!!content$}
!!define{!!displaymath{content}}{$$ !!content $$} !!define{!!displaymath{content}}{$$ !!content $$}
!!define{!!tableheader{ref_id}{description}}{
Table: !!description \label{!!ref_id}
}
doc/rapport.gpp.md
+ 42
− 29
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...@@ -19,8 +19,10 @@ date: | ...@@ -19,8 +19,10 @@ date: |
geometry: margin=2.5cm,includefoot,includehead geometry: margin=2.5cm,includefoot,includehead
papersize: a4 papersize: a4
numbersections: true numbersections: true
fontsize: 12pt
mainfont: lmroman12-regular.otf mainfont: lmroman12-regular.otf
monofont: lmmono12-regular.otf monofont: lmmono12-regular.otf
monofontoptions: Scale=0.75
output: pdf_document output: pdf_document
linkcolor: cyan linkcolor: cyan
header-includes: | header-includes: |
...@@ -30,7 +32,7 @@ header-includes: | ...@@ -30,7 +32,7 @@ header-includes: |
\usepackage{float} \usepackage{float}
\usepackage{lastpage} \usepackage{lastpage}
\usepackage{fvextra} \usepackage{fvextra}
\DefineVerbatimEnvironment{Highlighting}{Verbatim}{breaklines,commandchars=\\\{\}} \DefineVerbatimEnvironment{Highlighting}{Verbatim}{frame=single,breaklines,commandchars=\\\{\}}
\pagestyle{fancy} \pagestyle{fancy}
\setlength{\headheight}{14pt} \setlength{\headheight}{14pt}
...@@ -639,7 +641,7 @@ ssh-copy-id debian1.home ...@@ -639,7 +641,7 @@ ssh-copy-id debian1.home
Finalement, le benchmark de la copie a été lancé sur `debian2`: Finalement, le benchmark de la copie a été lancé sur `debian2`:
```console ```bash
$ perf stat -r 4 -d scp debian1.home:/home/debian/win10.tar.gz /home/debian/win10.tar.gz $ perf stat -r 4 -d scp debian1.home:/home/debian/win10.tar.gz /home/debian/win10.tar.gz
win10.tar.gz 100% 13GB 109.6MB/s 01:59 win10.tar.gz 100% 13GB 109.6MB/s 01:59
win10.tar.gz 100% 13GB 109.6MB/s 01:59 win10.tar.gz 100% 13GB 109.6MB/s 01:59
...@@ -678,7 +680,7 @@ cp win10.tar.gz /var/www/html/ ...@@ -678,7 +680,7 @@ cp win10.tar.gz /var/www/html/
Finalement, le benchmark du téléchargement du fichier avec la commande Finalement, le benchmark du téléchargement du fichier avec la commande
`wget` a été lancé sur `debian2`: `wget` a été lancé sur `debian2`:
```console ```bash
$ perf stat -r 4 -d wget http://debian1.home/win10.tar.gz $ perf stat -r 4 -d wget http://debian1.home/win10.tar.gz
--2020-05-20 09:53:53-- http://debian1.home/win10.tar.gz --2020-05-20 09:53:53-- http://debian1.home/win10.tar.gz
Resolving debian1.home (debian1.home)... 2a02:120b:c3e2:cab0:e6b9:7aff:feed:e0cd, 192.168.1.29 Resolving debian1.home (debian1.home)... 2a02:120b:c3e2:cab0:e6b9:7aff:feed:e0cd, 192.168.1.29
...@@ -765,7 +767,7 @@ le fichier à `win10.tar.gz` est déjà présent dans le dossier ...@@ -765,7 +767,7 @@ le fichier à `win10.tar.gz` est déjà présent dans le dossier
`/home/debian`. La commande suivante est lancée pour mesurer le temps de `/home/debian`. La commande suivante est lancée pour mesurer le temps de
transfert: transfert:
```console ```bash
$ perf stat -r 4 -d lftp -u debian,debian -e "get -e win10.tar.gz;quit" debian1.home $ perf stat -r 4 -d lftp -u debian,debian -e "get -e win10.tar.gz;quit" debian1.home
13743592907 bytes transferred in 120 seconds (109.61 MiB/s) 13743592907 bytes transferred in 120 seconds (109.61 MiB/s)
13743592907 bytes transferred in 120 seconds (109.11 MiB/s) 13743592907 bytes transferred in 120 seconds (109.11 MiB/s)
...@@ -816,7 +818,7 @@ exit ...@@ -816,7 +818,7 @@ exit
Finalement, le benchmark de la copie a été lancé sur `debian2`: Finalement, le benchmark de la copie a été lancé sur `debian2`:
```console ```bash
$ perf stat -r 4 -d cp -f /nfsroot/win10.tar.gz ~/win10.tar.gz $ perf stat -r 4 -d cp -f /nfsroot/win10.tar.gz ~/win10.tar.gz
Performance counter stats for 'cp -f /nfsroot/win10.tar.gz /home/debian/win10.tar.gz' (4 runs): Performance counter stats for 'cp -f /nfsroot/win10.tar.gz /home/debian/win10.tar.gz' (4 runs):
...@@ -861,7 +863,7 @@ apt install samba-client ...@@ -861,7 +863,7 @@ apt install samba-client
Finalement, le benchmark de la copie est lancé sur `debian2`: Finalement, le benchmark de la copie est lancé sur `debian2`:
```command ```bash
$ perf stat -r 4 -d smbclient -U debian%debian //debian1.home/debian -c 'get win10.tar.gz' $ perf stat -r 4 -d smbclient -U debian%debian //debian1.home/debian -c 'get win10.tar.gz'
Unable to initialize messaging context Unable to initialize messaging context
getting file \win10.tar.gz of size 13743592907 as win10.tar.gz (109684.9 KiloBytes/sec) (average 109684.9 KiloBytes/sec) getting file \win10.tar.gz of size 13743592907 as win10.tar.gz (109684.9 KiloBytes/sec) (average 109684.9 KiloBytes/sec)
...@@ -941,15 +943,19 @@ Ensuite, il faut récupérer l'identifiant unique `PeerID` de `debian1` ...@@ -941,15 +943,19 @@ Ensuite, il faut récupérer l'identifiant unique `PeerID` de `debian1`
pour pouvoir le configurer comme un noeud d'amorçage dans `debian2`. La pour pouvoir le configurer comme un noeud d'amorçage dans `debian2`. La
commande suivante est lancée sur `debian1`: commande suivante est lancée sur `debian1`:
```console ```bash
$ IPFS_PATH=~/.ipfs ipfs config show | grep "PeerID" $ IPFS_PATH=~/.ipfs ipfs config show | grep "PeerID"
"PeerID": "QmX9MYUQhjKxua6HQMtpzaZd9ui4gGT75FJgAxeQJC47Ei" "PeerID": "QmX9MYUQhjKxua6HQMtpzaZd9ui4gGT75FJgAxeQJC47Ei"
``` ```
L'identitfiant unique `PeerID` de `debian1` retourné par la commande L'identitfiant unique `PeerID` de `debian1` retourné par la commande
est: `QmX9MYUQhjKxua6HQMtpzaZd9ui4gGT75FJgAxeQJC47Ei`. On peut est:
maintenant le rajouter dans la configuration des noeuds d'amorçage des
deux machines en lançant la commande suivante sur chacune d'entre elle: `QmX9MYUQhjKxua6HQMtpzaZd9ui4gGT75FJgAxeQJC47Ei`
On peutmaintenant le rajouter dans la configuration des noeuds
d'amorçage des deux machines en lançant la commande suivante sur chacune
d'entre elle:
```bash ```bash
IPFS_PATH=~/.ipfs ipfs bootstrap add /dnsaddr/debian1.home/p2p/QmX9MYUQhjKxua6HQMtpzaZd9ui4gGT75FJgAxeQJC47Ei IPFS_PATH=~/.ipfs ipfs bootstrap add /dnsaddr/debian1.home/p2p/QmX9MYUQhjKxua6HQMtpzaZd9ui4gGT75FJgAxeQJC47Ei
...@@ -972,10 +978,10 @@ avec une unité systemd. ...@@ -972,10 +978,10 @@ avec une unité systemd.
Maintenant on peut partager l'image sur le réseau avec la commande Maintenant on peut partager l'image sur le réseau avec la commande
suivante sur `debian1`: suivante sur `debian1`:
```console ```bash
$ IPFS_PATH=~/.ipfs ipfs add win10.tar.gz $ IPFS_PATH=~/.ipfs ipfs add win10.tar.gz
added QmRm8As8ECuQoLq3UWowsxJ8mh89txLvpUh7A2mgw5pMhv win10.tar.gz added QmRm8As8ECuQoLq3UWowsxJ8mh89txLvpUh7A2mgw5pMhv win10.tar.gz
12.80 GiB / 12.80 GiB [====================================================================================] 100.00% 12.80 GiB / 12.80 GiB [==============================================================================] 100.00%
``` ```
Le temps d'ajout de l'image a pris plus de trois minutes. À la fin, la Le temps d'ajout de l'image a pris plus de trois minutes. À la fin, la
...@@ -984,7 +990,7 @@ est affichée: `QmRm8As8ECuQoLq3UWowsxJ8mh89txLvpUh7A2mgw5pMhv`. ...@@ -984,7 +990,7 @@ est affichée: `QmRm8As8ECuQoLq3UWowsxJ8mh89txLvpUh7A2mgw5pMhv`.
On peut maintenant tenter de récupérer le fichier depuis `debian2`: On peut maintenant tenter de récupérer le fichier depuis `debian2`:
```console ```bash
$ IPFS_PATH=~/.ipfs ipfs get QmRm8As8ECuQoLq3UWowsxJ8mh89txLvpUh7A2mgw5pMhv $ IPFS_PATH=~/.ipfs ipfs get QmRm8As8ECuQoLq3UWowsxJ8mh89txLvpUh7A2mgw5pMhv
Saving file(s) to QmRm8As8ECuQoLq3UWowsxJ8mh89txLvpUh7A2mgw5pMhv Saving file(s) to QmRm8As8ECuQoLq3UWowsxJ8mh89txLvpUh7A2mgw5pMhv
12.80 GiB / 12.80 GiB [==============================================================================] 100.00% 7m27s 12.80 GiB / 12.80 GiB [==============================================================================] 100.00% 7m27s
...@@ -994,22 +1000,29 @@ Le transfert a pris !!inlinemath{7m27s = 447s}. C'est beaucoup trop long ...@@ -994,22 +1000,29 @@ Le transfert a pris !!inlinemath{7m27s = 447s}. C'est beaucoup trop long
pour nos besoins. Le benchmark avec `perf` n'a même pas été effectué au pour nos besoins. Le benchmark avec `perf` n'a même pas été effectué au
vu de ce résultat. vu de ce résultat.
### Comparaison des résultats des tests de protocoles de transfert de fichiers ### Choix du protocole de transfert de fichiers
!!barchart{chart_protocols}{Graphique comparant la durée de la copie d'un fichier avec différents protocoles}{ La table !!ref{table_protocols} ainsi que la figure
"Protocole";"Durée (secondes)" !!ref{chart_protocols} récapitulent les résultats mesurés pour chacun
"FTP";123 des protocoles testés. On peut remarquer que pour tous les protocoles,
"HTTP";456 sauf !!acronym{IPFS}, les résultats sont proches de 120 secondes. Cette
"tutu";123 durée montre que pour ces protocoles, on est proches de la limite
} théorique de gigabit ethernet:
### Protocole choisi pour le transfert d'image !!displaymath{\frac{13743592907 [B]}{120 [s]} = \frac{109948743256 [b]}{120 [s]} \approx 916239527 [b/s] \approx 0.916 [Gb/s] \approx 1 [Gb/s]}
**TODO: expliquer, détailler et On peut donc conclure que le choix du protocole !!acronym{NFS} est
comparer (tableaux, diagrammes) les différentes mesures qui ont conduit approprié car les autres protocole n'accélèrent pas considérablement la
à garder NFS pour le transfert des images. Aussi expliquer les limites vitesse de transfert d'une image.
probables de NFS avec beaucoup de postes simultanés et donner des pistes
d'amélioration (multicast, bittorrent+http, optimisations NFS).** !!barchart{chart_protocols}{table_protocols}{mesures de la durée de la copie d'un fichier avec différents protocoles}{
"Protocole";"Durée (secondes)";"Écart entre les mesures (± secondes)";"Nombre de mesures"
"SCP";119.8094;0.0182;4
"HTTP";119.871;0.235;4
"FTP";120.151;0.213;4
"NFS";120.417;0.119;4
"SMB";122.565;0.215;4
"IPFS";447;0;1}
## Réduction de la taille des images ## Réduction de la taille des images
......
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+ 54
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...@@ -629,7 +629,7 @@ ssh-copy-id debian1.home ...@@ -629,7 +629,7 @@ ssh-copy-id debian1.home
Finalement, le benchmark de la copie a été lancé sur `debian2`: Finalement, le benchmark de la copie a été lancé sur `debian2`:
```console ```bash
$ perf stat -r 4 -d scp debian1.home:/home/debian/win10.tar.gz /home/debian/win10.tar.gz $ perf stat -r 4 -d scp debian1.home:/home/debian/win10.tar.gz /home/debian/win10.tar.gz
win10.tar.gz 100% 13GB 109.6MB/s 01:59 win10.tar.gz 100% 13GB 109.6MB/s 01:59
win10.tar.gz 100% 13GB 109.6MB/s 01:59 win10.tar.gz 100% 13GB 109.6MB/s 01:59
...@@ -668,7 +668,7 @@ cp win10.tar.gz /var/www/html/ ...@@ -668,7 +668,7 @@ cp win10.tar.gz /var/www/html/
Finalement, le benchmark du téléchargement du fichier avec la commande Finalement, le benchmark du téléchargement du fichier avec la commande
`wget` a été lancé sur `debian2`: `wget` a été lancé sur `debian2`:
```console ```bash
$ perf stat -r 4 -d wget http://debian1.home/win10.tar.gz $ perf stat -r 4 -d wget http://debian1.home/win10.tar.gz
--2020-05-20 09:53:53-- http://debian1.home/win10.tar.gz --2020-05-20 09:53:53-- http://debian1.home/win10.tar.gz
Resolving debian1.home (debian1.home)... 2a02:120b:c3e2:cab0:e6b9:7aff:feed:e0cd, 192.168.1.29 Resolving debian1.home (debian1.home)... 2a02:120b:c3e2:cab0:e6b9:7aff:feed:e0cd, 192.168.1.29
...@@ -755,7 +755,7 @@ le fichier à `win10.tar.gz` est déjà présent dans le dossier ...@@ -755,7 +755,7 @@ le fichier à `win10.tar.gz` est déjà présent dans le dossier
`/home/debian`. La commande suivante est lancée pour mesurer le temps de `/home/debian`. La commande suivante est lancée pour mesurer le temps de
transfert: transfert:
```console ```bash
$ perf stat -r 4 -d lftp -u debian,debian -e "get -e win10.tar.gz;quit" debian1.home $ perf stat -r 4 -d lftp -u debian,debian -e "get -e win10.tar.gz;quit" debian1.home
13743592907 bytes transferred in 120 seconds (109.61 MiB/s) 13743592907 bytes transferred in 120 seconds (109.61 MiB/s)
13743592907 bytes transferred in 120 seconds (109.11 MiB/s) 13743592907 bytes transferred in 120 seconds (109.11 MiB/s)
...@@ -806,7 +806,7 @@ exit ...@@ -806,7 +806,7 @@ exit
Finalement, le benchmark de la copie a été lancé sur `debian2`: Finalement, le benchmark de la copie a été lancé sur `debian2`:
```console ```bash
$ perf stat -r 4 -d cp -f /nfsroot/win10.tar.gz ~/win10.tar.gz $ perf stat -r 4 -d cp -f /nfsroot/win10.tar.gz ~/win10.tar.gz
Performance counter stats for 'cp -f /nfsroot/win10.tar.gz /home/debian/win10.tar.gz' (4 runs): Performance counter stats for 'cp -f /nfsroot/win10.tar.gz /home/debian/win10.tar.gz' (4 runs):
...@@ -851,7 +851,7 @@ apt install samba-client ...@@ -851,7 +851,7 @@ apt install samba-client
Finalement, le benchmark de la copie est lancé sur `debian2`: Finalement, le benchmark de la copie est lancé sur `debian2`:
```command ```bash
$ perf stat -r 4 -d smbclient -U debian%debian //debian1.home/debian -c 'get win10.tar.gz' $ perf stat -r 4 -d smbclient -U debian%debian //debian1.home/debian -c 'get win10.tar.gz'
Unable to initialize messaging context Unable to initialize messaging context
getting file \win10.tar.gz of size 13743592907 as win10.tar.gz (109684.9 KiloBytes/sec) (average 109684.9 KiloBytes/sec) getting file \win10.tar.gz of size 13743592907 as win10.tar.gz (109684.9 KiloBytes/sec) (average 109684.9 KiloBytes/sec)
...@@ -931,15 +931,19 @@ Ensuite, il faut récupérer l'identifiant unique `PeerID` de `debian1` ...@@ -931,15 +931,19 @@ Ensuite, il faut récupérer l'identifiant unique `PeerID` de `debian1`
pour pouvoir le configurer comme un noeud d'amorçage dans `debian2`. La pour pouvoir le configurer comme un noeud d'amorçage dans `debian2`. La
commande suivante est lancée sur `debian1`: commande suivante est lancée sur `debian1`:
```console ```bash
$ IPFS_PATH=~/.ipfs ipfs config show | grep "PeerID" $ IPFS_PATH=~/.ipfs ipfs config show | grep "PeerID"
"PeerID": "QmX9MYUQhjKxua6HQMtpzaZd9ui4gGT75FJgAxeQJC47Ei" "PeerID": "QmX9MYUQhjKxua6HQMtpzaZd9ui4gGT75FJgAxeQJC47Ei"
``` ```
L'identitfiant unique `PeerID` de `debian1` retourné par la commande L'identitfiant unique `PeerID` de `debian1` retourné par la commande
est: `QmX9MYUQhjKxua6HQMtpzaZd9ui4gGT75FJgAxeQJC47Ei`. On peut est:
maintenant le rajouter dans la configuration des noeuds d'amorçage des
deux machines en lançant la commande suivante sur chacune d'entre elle: `QmX9MYUQhjKxua6HQMtpzaZd9ui4gGT75FJgAxeQJC47Ei`
On peutmaintenant le rajouter dans la configuration des noeuds
d'amorçage des deux machines en lançant la commande suivante sur chacune
d'entre elle:
```bash ```bash
IPFS_PATH=~/.ipfs ipfs bootstrap add /dnsaddr/debian1.home/p2p/QmX9MYUQhjKxua6HQMtpzaZd9ui4gGT75FJgAxeQJC47Ei IPFS_PATH=~/.ipfs ipfs bootstrap add /dnsaddr/debian1.home/p2p/QmX9MYUQhjKxua6HQMtpzaZd9ui4gGT75FJgAxeQJC47Ei
...@@ -962,10 +966,10 @@ avec une unité systemd. ...@@ -962,10 +966,10 @@ avec une unité systemd.
Maintenant on peut partager l'image sur le réseau avec la commande Maintenant on peut partager l'image sur le réseau avec la commande
suivante sur `debian1`: suivante sur `debian1`:
```console ```bash
$ IPFS_PATH=~/.ipfs ipfs add win10.tar.gz $ IPFS_PATH=~/.ipfs ipfs add win10.tar.gz
added QmRm8As8ECuQoLq3UWowsxJ8mh89txLvpUh7A2mgw5pMhv win10.tar.gz added QmRm8As8ECuQoLq3UWowsxJ8mh89txLvpUh7A2mgw5pMhv win10.tar.gz
12.80 GiB / 12.80 GiB [====================================================================================] 100.00% 12.80 GiB / 12.80 GiB [==============================================================================] 100.00%
``` ```
Le temps d'ajout de l'image a pris plus de trois minutes. À la fin, la Le temps d'ajout de l'image a pris plus de trois minutes. À la fin, la
...@@ -974,7 +978,7 @@ est affichée: `QmRm8As8ECuQoLq3UWowsxJ8mh89txLvpUh7A2mgw5pMhv`. ...@@ -974,7 +978,7 @@ est affichée: `QmRm8As8ECuQoLq3UWowsxJ8mh89txLvpUh7A2mgw5pMhv`.
On peut maintenant tenter de récupérer le fichier depuis `debian2`: On peut maintenant tenter de récupérer le fichier depuis `debian2`:
```console ```bash
$ IPFS_PATH=~/.ipfs ipfs get QmRm8As8ECuQoLq3UWowsxJ8mh89txLvpUh7A2mgw5pMhv $ IPFS_PATH=~/.ipfs ipfs get QmRm8As8ECuQoLq3UWowsxJ8mh89txLvpUh7A2mgw5pMhv
Saving file(s) to QmRm8As8ECuQoLq3UWowsxJ8mh89txLvpUh7A2mgw5pMhv Saving file(s) to QmRm8As8ECuQoLq3UWowsxJ8mh89txLvpUh7A2mgw5pMhv
12.80 GiB / 12.80 GiB [==============================================================================] 100.00% 7m27s 12.80 GiB / 12.80 GiB [==============================================================================] 100.00% 7m27s
...@@ -984,24 +988,47 @@ Le transfert a pris $`7m27s = 447s`$. C'est beaucoup trop long ...@@ -984,24 +988,47 @@ Le transfert a pris $`7m27s = 447s`$. C'est beaucoup trop long
pour nos besoins. Le benchmark avec `perf` n'a même pas été effectué au pour nos besoins. Le benchmark avec `perf` n'a même pas été effectué au
vu de ce résultat. vu de ce résultat.
### Comparaison des résultats des tests de protocoles de transfert de fichiers ### Choix du protocole de transfert de fichiers
La table ![ci-dessous](#table_protocols) ainsi que la figure
![ci-dessous](#chart_protocols) récapitulent les résultats mesurés pour chacun
des protocoles testés. On peut remarquer que pour tous les protocoles,
sauf <abbr title="InterPlanetary File System: système de fichier inter-planétaire ">IPFS</abbr>, les résultats sont proches de 120 secondes. Cette
durée montre que pour ces protocoles, on est proches de la limite
théorique de gigabit ethernet:
```math
\frac{13743592907 [B]}{120 [s]} = \frac{109948743256 [b]}{120 [s]} \approx 916239527 [b/s] \approx 0.916 [Gb/s] \approx 1 [Gb/s]
```
On peut donc conclure que le choix du protocole <abbr title="Network File System: système de fichiers en réseau ">NFS</abbr> est
approprié car les autres protocole n'accélèrent pas considérablement la
vitesse de transfert d'une image.
Table des mesures de la durée de la copie d'un fichier avec différents protocoles: <a name="table_protocols"/>
|Protocole|Durée (secondes)|Écart entre les mesures (± secondes)|Nombre de mesures|
|--|--|--|--|
|SCP|119.8094|0.0182|4|
|HTTP|119.871|0.235|4|
|FTP|120.151|0.213|4|
|NFS|120.417|0.119|4|
|SMB|122.565|0.215|4|
|IPFS|447|0|1|
<figure> <figure>
<a name="chart_protocols"/> <a name="chart_protocols"/>
![Graphique comparant la durée de la copie d'un fichier avec différents protocoles](charts/chart_protocols.png) ![Graphique des mesures de la durée de la copie d'un fichier avec différents protocoles](charts/chart_protocols.png)
<figcaption>Graphique comparant la durée de la copie d'un fichier avec différents protocoles</figcaption> <figcaption>Graphique des mesures de la durée de la copie d'un fichier avec différents protocoles</figcaption>
</figure> </figure>
### Protocole choisi pour le transfert d'image
**TODO: expliquer, détailler et
comparer (tableaux, diagrammes) les différentes mesures qui ont conduit
à garder NFS pour le transfert des images. Aussi expliquer les limites
probables de NFS avec beaucoup de postes simultanés et donner des pistes
d'amélioration (multicast, bittorrent+http, optimisations NFS).**
## Réduction de la taille des images ## Réduction de la taille des images
**TODO: expliquer, détailler et comparer (tableaux, diagrammes) les **TODO: expliquer, détailler et comparer (tableaux, diagrammes) les
...@@ -2892,10 +2919,12 @@ It looks like the bottleneck is effectively the network. ...@@ -2892,10 +2919,12 @@ It looks like the bottleneck is effectively the network.
If 13743592907 bytes were transferred in 120 seconds, we are close to the theorical If 13743592907 bytes were transferred in 120 seconds, we are close to the theorical
bitrate of $1 [Gbps]$, because: bitrate of $1 [Gbps]$, because:
```math ```math
\frac{13743592907 [b]}{120 [s]} = 114529940.892 [bps] = 0.916239528 [Gbps] \frac{13743592907 [b]}{120 [s]} = 114529940.892 [bps] = 0.916239528 [Gbps]
``` ```
In practice, the bottleneck will be the network interface of the In practice, the bottleneck will be the network interface of the
server. server.
......
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