<s>
Vegeta	B-Application
is	O
an	O
HTTP	B-Protocol
load	O
testing	O
tool	O
written	O
in	O
Go	B-Application
that	O
can	O
be	O
used	O
as	O
a	O
command	O
in	O
a	O
command-line	B-Application
interface	I-Application
or	O
as	O
a	O
library	B-Library
.	O
</s>
<s>
The	O
program	O
tests	O
how	O
an	O
HTTP-based	O
application	O
behaves	O
when	O
multiple	O
users	O
access	O
it	O
at	O
the	O
same	O
time	O
by	O
generating	O
a	O
background	O
load	O
of	O
GET	O
requests	O
.	O
</s>
<s>
Vegeta	B-Application
is	O
used	O
to	O
generate	O
a	O
sustained	O
,	O
constant	O
number	O
of	O
requests	O
per	O
second	O
in	O
order	O
to	O
discover	O
how	O
long	O
a	O
service	O
can	O
sustain	O
a	O
peak	O
load	O
before	O
dropping	O
in	O
performance	O
.	O
</s>
<s>
Vegeta	B-Application
is	O
provided	O
for	O
use	O
by	O
web	O
hosting	O
services	O
such	O
as	O
Scaleway	B-General_Concept
to	O
use	O
varied	O
and	O
multiple	O
requests	O
to	O
stress	O
test	O
client	O
HTTP	B-Protocol
services	O
.	O
</s>
<s>
It	O
is	O
also	O
used	O
with	O
dedicated	O
load-testing	O
platform	O
services	O
such	O
as	O
BlazeMeter	B-Application
.	O
</s>
<s>
The	O
command-line	B-Application
usage	O
is	O
in	O
the	O
format	O
of	O
.	O
</s>
<s>
The	O
commands	O
available	O
are	O
,	O
,	O
,	O
and	O
,	O
each	O
with	O
its	O
own	O
various	O
command	O
flag	O
options	O
,	O
and	O
both	O
attack	O
input	O
and	O
report	O
output	O
can	O
be	O
done	O
in	O
an	O
optional	O
json	B-General_Concept
format	O
when	O
specified	O
with	O
the	O
appropriate	O
flag	O
.	O
</s>
<s>
Vegeta	B-Application
can	O
specify	O
targets	O
as	O
URLs	O
in	O
a	O
separate	O
file	O
with	O
optional	O
custom	O
headers	O
and	O
requests	O
,	O
which	O
can	O
then	O
be	O
used	O
as	O
an	O
input	O
option	O
on	O
the	O
command	B-Application
line	I-Application
.	O
</s>
<s>
An	O
example	O
usage	O
would	O
be	O
to	O
issue	O
from	O
the	O
command-line	B-Application
.	O
</s>
<s>
This	O
example	O
uses	O
the	O
echo	B-Application
command	I-Application
to	O
output	O
,	O
and	O
then	O
executes	O
the	O
attack	O
command	O
for	O
that	O
output	O
for	O
five	O
seconds	O
.	O
</s>
<s>
After	O
that	O
,	O
it	O
uses	O
the	O
tee	B-Operating_System
command	I-Operating_System
to	O
write	O
results	O
to	O
a	O
file	O
called	O
results.bin	O
,	O
and	O
runs	O
the	O
report	O
command	O
to	O
display	O
the	O
output	O
of	O
the	O
attack	O
results	O
.	O
</s>
