<s>
Iometer	B-General_Concept
is	O
an	O
I/O	B-General_Concept
subsystem	O
measurement	O
and	O
characterization	O
tool	O
for	O
single	O
and	O
clustered	B-Architecture
systems	I-Architecture
.	O
</s>
<s>
It	O
is	O
used	O
as	O
a	O
benchmark	O
and	O
troubleshooting	O
tool	O
and	O
is	O
easily	O
configured	O
to	O
replicate	O
the	O
behaviour	O
of	O
many	O
popular	O
applications	B-Application
.	O
</s>
<s>
Created	O
by	O
Intel	O
Corporation	O
(	O
Sean	O
Hefty	O
,	O
David	O
Levine	O
and	O
Fab	O
Tillier	O
are	O
listed	O
by	O
the	O
Iometer	B-General_Concept
About	O
dialog	O
as	O
the	O
developers	B-Application
)	O
,	O
the	O
tool	O
was	O
officially	O
announced	O
at	O
the	O
Intel	O
Developer	B-Application
Forum	O
(	O
IDF	O
)	O
on	O
17	O
February	O
1998	O
.	O
</s>
<s>
In	O
2001	O
Intel	O
discontinued	O
development	O
and	O
subsequently	O
handed	O
the	O
sources	O
to	O
the	O
Open	O
Source	O
Development	O
Lab	O
for	O
release	O
under	O
the	O
Intel	B-License
Open	I-License
Source	I-License
License	I-License
.	O
</s>
<s>
On	O
15	O
November	O
2001	O
the	O
Iometer	B-General_Concept
project	O
was	O
registered	O
at	O
SourceForge.net	B-Application
and	O
an	O
initial	O
version	O
was	O
made	O
available	O
.	O
</s>
<s>
Since	O
then	O
it	O
has	O
been	O
driven	O
by	O
an	O
international	O
group	O
of	O
individuals	O
who	O
have	O
been	O
improving	O
and	O
porting	O
the	O
product	O
to	O
additional	O
platforms	B-Device
.	O
</s>
<s>
Iometer	B-General_Concept
is	O
based	O
on	O
a	O
client	B-Operating_System
–	I-Operating_System
server	I-Operating_System
model	I-Operating_System
,	O
where	O
one	O
instance	O
of	O
the	O
Iometer	B-General_Concept
graphical	B-Application
user	I-Application
interface	I-Application
is	O
managing	O
one	O
or	O
more	O
'	O
managers	O
 '	O
(	O
each	O
one	O
representing	O
a	O
separate	O
Dynamo.exe	O
process	B-Operating_System
)	O
which	O
are	O
doing	O
the	O
I/O	B-General_Concept
with	O
one	O
or	O
more	O
worker	B-Operating_System
threads	I-Operating_System
.	O
</s>
<s>
Iometer	B-General_Concept
performs	O
Asynchronous	B-Architecture
I/O	I-Architecture
-	O
accessing	O
files	B-Operating_System
or	O
block	O
devices	O
(	O
later	O
one	O
allowing	O
to	O
bypass	O
the	O
file	O
system	O
buffers	O
)	O
.	O
</s>
<s>
Iometer	B-General_Concept
allows	O
the	O
configuration	O
of	O
disk	B-Device
parameters	O
such	O
as	O
the	O
'	O
Maximum	O
Disk	B-Device
Size	O
 '	O
,	O
'	O
Starting	O
Disk	B-Application
Sector	I-Application
 '	O
and	O
'	O
#	O
of	O
Outstanding	O
I/Os	O
'	O
.	O
</s>
<s>
This	O
allows	O
a	O
user	O
to	O
configure	O
a	O
test	O
file	O
upon	O
which	O
the	O
'	O
Access	O
Specifications	O
 '	O
configure	O
the	O
I/O	B-General_Concept
types	O
to	O
the	O
file	O
.	O
</s>
<s>
Aligned	O
I/O	B-General_Concept
'	O
s	O
.	O
</s>
<s>
In	O
conjunction	O
with	O
the	O
Access	O
Specifications	O
,	O
Iometer	B-General_Concept
allows	O
the	O
specifications	O
to	O
be	O
cycled	O
with	O
incrementing	O
outstanding	O
I/O	B-General_Concept
'	O
s	O
,	O
either	O
exponentially	O
or	O
linearly	O
.	O
</s>
<s>
The	O
tool	O
outputs	O
50	O
parameters	O
into	O
a	O
.CSV	O
file	O
,	O
allowing	O
multiple	O
applications	B-Application
to	O
analyse	O
and	O
generate	O
graphs	O
and	O
reports	O
on	O
the	O
measured	O
performance	O
.	O
</s>
