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Commit 1a940d09 authored by OLIVO Romain's avatar OLIVO Romain
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import requests
import os
import json
import copy
from statistics import mean
from statistics import stdev
from math import sqrt
if __name__ == "__main__":
# The path to the compressed filesystem image
# We can point to local file since our homedir is available from NFS
FSIMG="file:///home/rolivo/distem_img/distem-fs-jessie.tar.gz"
# Put the physical machines that have been assigned to you
# You can get that by executing: cat $OAR_NODE_FILE | uniq
PNODES=["econome-21.nantes.grid5000.fr","econome-5.nantes.grid5000.fr"]
# The first argument of the script is the address (in CIDR format)
# of the virtual network to set-up in our platform
# This ruby hash table describes our virtual network
vnet = {
'name': 'lol',
'address': "10.176.0.0/22"
}
nodelist = ['node-1','node-2']
# Read SSH keys
PRIV_KEY = os.path.join(os.environ["HOME"], ".ssh", "id_rsa")
PUB_KEY = "%s.pub" % PRIV_KEY
private_key = open(os.path.expanduser(PRIV_KEY)).read()
public_key = open(os.path.expanduser(PUB_KEY)).read()
sshkeys = {
"public" : public_key,
"private" : private_key
}
latencies = ['0ms', '20ms', '40ms', '60ms']
results = {
'scp': {},
'rsync': {}
}
node1 = {
'name': 'node-1',
'address': []
}
node2 = {
'name': 'node-2',
'address': []
}
ifname = 'if0'
iteration = 5
def average(values, length_values):
sum_values = 0.0
for i in range(length_values):
sum_values += values[i]
return sum_values / length_values
def stddev(values, iteration):
return sqrt(values / iteration)
# Connect to the Distem server (on http://localhost:4567 by default)
distem = Distem()
# Start by creating the virtual network
print("Network created")
distem.vnetwork_create(vnet['name'],
vnet['address'])
# Creating one virtual node per physical one
# Create the first virtual node and set it to be hosted on
# the first physical machine
print("Node %s created" %nodelist[0])
distem.vnode_create(nodelist[0],
{'host': PNODES[0]}, sshkeys)
# Specify the path to the compressed filesystem image
# of this virtual node
distem.vfilesystem_create(nodelist[0],
{'image': FSIMG})
# Create a virtual network interface and connect it to vnet
print("Interface created")
distem.viface_create(nodelist[0],
'if0',
{'vnetwork': vnet['name'], 'default': 'true' })
# Create the first virtual node and set it to be hosted on
# the second physical machine
print("Node %s created" %nodelist[1])
distem.vnode_create(nodelist[1],
{'host': PNODES[1] },
sshkeys)
distem.vfilesystem_create(nodelist[1],
{'image': FSIMG })
# Create a virtual network interface and connect it to vnet
print("Interface created")
distem.viface_create(nodelist[1],
'if0',
{ 'vnetwork': vnet['name'] }
)
# Starting the virtual nodes using the synchronous method
distem.vnodes_start(nodelist)
print("Nodes started")
# Getting the -automatically affected- address of each virtual nodes
# virtual network interfaces
node1['address'] = distem.viface_info(node1['name'],ifname)['address'].split("/")[0]
node2['address'] = distem.viface_info(node2['name'],ifname)['address'].split("/")[0]
# Creating the files we will use in our experimentation
distem.vnode_execute(node1['name'],
'mkdir -p /tmp/src ; cd /tmp/src ; \
for i in `seq 1 100`; do \
dd if=/dev/zero of=$i bs=1K count=50; \
done'
)
# Printing the current latency
start_time = float(time.time())
distem.vnode_execute(node1['name'], 'hostname')
print("Latency without any limitations # %s" %(str(time.time() - start_time)))
desc = {
'output': {
'latency': {
'delay': []
}
}
}
# Starting our experiment for each specified latencies
print('Starting tests')
for latency in latencies:
sum_rsync = 0.0
sum_scp = 0.0
deviation_scp = 0.0
deviation_rsync = 0.0
print("Latency #%s" %str(latency))
# Update the latency description on virtual nodes
desc['output']['latency']['delay'] = latency
distem.viface_update(node1['name'],ifname,desc)
distem.viface_update(node2['name'],ifname,desc)
for i in range(iteration):
print("\tIteration ## %s" %i)
# Launch SCP test
# Cleaning target directory on node2
distem.vnode_execute(node2['name'], 'rm -rf /tmp/dst')
# Starting the copy from node1 to node2
start_time = round(time.time(), 5)
distem.vnode_execute(node1['name'],
"scp -rq /tmp/src #{node2['address']}:/tmp/dst"
)
values_scp = round(time.time() - start_time, 5)
sum_scp += values_scp
# Launch RSYNC test
# Cleaning target directory on node2
distem.vnode_execute(node2['name'], 'rm -rf /tmp/dst')
# Starting the copy from node1 to node2
start_time = time.time()
distem.vnode_execute('node-1',
"rsync -r /tmp/src #{node2['address']}:/tmp/dst"
)
values_rsync = round(time.time() - start_time, 5)
sum_rsync += values_rsync
deviation_scp += (values_scp-sum_scp) * (values_scp-sum_scp)
deviation_rsync += (values_rsync-sum_rsync) * (values_rsync-sum_rsync)
print("SCP results:")
print("%s: [average=%s,standard_deviation=%s]"
%(str(latency), str(sum_scp/iteration), stddev(deviation_scp, iteration)))
print("RSYNC results:")
print("%s: [average=%s,standard_deviation=%s]"
%(str(latency), str(sum_rsync/iteration), stddev(deviation_rsync, iteration)))
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