<s>
LYME	B-Application
and	O
LYCE	B-Application
are	O
software	B-Application
stacks	I-Application
composed	O
entirely	O
of	O
free	B-License
and	I-License
open-source	I-License
software	I-License
to	O
build	O
high-availability	O
heavy	O
duty	O
dynamic	O
web	O
pages	O
.	O
</s>
<s>
Linux	B-Application
,	O
the	O
operating	B-General_Concept
system	I-General_Concept
;	O
</s>
<s>
Yaws	B-Application
,	O
the	O
web	B-Application
server	I-Application
;	O
</s>
<s>
Mnesia	B-General_Concept
or	O
CouchDB	B-Application
,	O
the	O
database	O
;	O
</s>
<s>
Erlang	B-Operating_System
,	O
the	O
functional	B-Language
programming	I-Language
language	I-Language
.	O
</s>
<s>
The	O
LYME	B-Application
and	O
LYCE	B-Application
bundles	O
can	O
be	O
and	O
are	O
combined	O
with	O
many	O
other	O
free	B-License
and	I-License
open-source	I-License
software	I-License
packages	O
such	O
as	O
e.g.	O
</s>
<s>
netsniff-ng	B-Protocol
for	O
security	O
testing	O
and	O
hardening	O
,	O
Snort	B-Language
,	O
an	O
intrusion	O
detection	O
(	O
IDS	O
)	O
and	O
intrusion	O
prevention	O
system	O
(	O
IPS	O
)	O
,	O
RRDtool	B-Language
for	O
diagrams	O
,	O
or	O
Nagios	B-Application
,	O
Collectd	B-Language
,	O
or	O
Cacti	B-Protocol
,	O
for	O
monitoring	O
.	O
</s>
<s>
Both	O
databases	O
Mnesia	B-General_Concept
and	O
CouchDB	B-Application
as	O
well	O
as	O
Yaws	B-Application
(	O
and	O
also	O
Mochiweb	O
,	O
Misultin	O
,	O
and	O
Cowboy	O
)	O
are	O
written	O
in	O
Erlang	B-Operating_System
,	O
so	O
web	O
applications	O
developed	O
for	O
LYME/LYCE	O
may	O
be	O
run	O
entirely	O
in	O
one	O
Erlang	B-Operating_System
virtual	B-Architecture
machine	I-Architecture
.	O
</s>
<s>
This	O
is	O
in	O
contrast	O
to	O
LAMP	B-Application
where	O
the	O
web	B-Application
server	I-Application
(	O
Apache	B-Application
)	O
and	O
the	O
application	O
(	O
written	O
in	O
PHP	B-Application
,	O
Perl	B-Language
or	O
Python	B-Language
)	O
might	O
be	O
in	O
the	O
same	O
process	B-Operating_System
,	O
but	O
the	O
database	O
is	O
always	O
a	O
separate	O
process	B-Operating_System
.	O
</s>
<s>
As	O
a	O
result	O
of	O
using	O
Erlang	B-Operating_System
,	O
LYME	B-Application
and	O
LYCE	B-Application
applications	O
perform	O
well	O
under	O
high	O
load	O
and	O
if	O
distribution	O
and	O
fault	O
tolerance	O
is	O
needed	O
.	O
</s>
<s>
The	O
query	O
and	O
data	B-Language
manipulation	I-Language
language	I-Language
of	O
Mnesia	B-General_Concept
is	O
also	O
Erlang	B-Operating_System
(	O
rather	O
than	O
SQL	B-Language
)	O
,	O
therefore	O
a	O
web-application	O
for	O
LYME	B-Application
is	O
developed	O
using	O
only	O
a	O
single	O
programming	O
language	O
.	O
</s>
<s>
Interest	O
in	O
LYME	B-Application
as	O
a	O
stack	O
had	O
begun	O
by	O
August	O
2005	O
,	O
as	O
was	O
soon	O
cited	O
as	O
a	O
high-performance	O
web	O
application	O
platform	O
that	O
used	O
a	O
single	O
development	O
language	O
throughout	O
.	O
</s>
<s>
Favorable	O
comparisons	O
to	O
other	O
popular	O
stacks	O
such	O
as	O
Ruby	B-Application
on	I-Application
Rails	I-Application
were	O
soon	O
forthcoming	O
.	O
</s>
<s>
Comparisons	O
to	O
LAMP	B-Application
have	O
also	O
been	O
favourable	O
,	O
although	O
some	O
have	O
highlighted	O
the	O
difficulties	O
of	O
porting	O
"	O
SQL	B-Language
thinking	O
"	O
to	O
the	O
very	O
different	O
context	O
of	O
Mnesia	B-General_Concept
.	O
</s>
<s>
A	O
successful	O
user	O
of	O
LYME	B-Application
is	O
the	O
Swedish	O
internet	O
payment-processing	O
company	O
Klarna	O
,	O
who	O
have	O
built	O
their	O
whole	O
architecture	O
on	O
LYME	B-Application
.	O
</s>
<s>
This	O
is	O
seen	O
as	O
a	O
successful	O
project	O
that	O
demonstrates	O
virtues	O
of	O
both	O
LYME	B-Application
and	O
functional	B-Language
programming	I-Language
in	O
general	O
.	O
</s>
<s>
LYME	B-Application
was	O
also	O
covered	O
in	O
the	O
Erlang	B-Operating_System
session	O
at	O
the	O
Software	O
Practice	O
Advancement	O
(	O
SPA	O
)	O
2008	O
.	O
</s>
<s>
Besides	O
Yaws	B-Application
,	O
there	O
are	O
several	O
other	O
web	B-Application
servers	I-Application
written	O
in	O
Erlang	B-Operating_System
,	O
e.g.	O
</s>
<s>
Besides	O
Mnesia	B-General_Concept
and	O
CouchDB	B-Application
,	O
there	O
are	O
a	O
couple	O
of	O
other	O
databases	O
written	O
in	O
Erlang	B-Operating_System
,	O
e.g.	O
,	O
Cloudant	B-General_Concept
,	O
Couchbase	B-Operating_System
Server	I-Operating_System
(	O
born	O
as	O
Membase	B-Operating_System
)	O
,	O
database	O
management	O
system	O
optimized	O
for	O
storing	O
data	O
behind	O
interactive	O
web	O
applications	O
,	O
Riak	B-General_Concept
,	O
and	O
SimpleDB	O
(	O
part	O
of	O
Amazon	B-Application
Web	I-Application
Services	I-Application
)	O
.	O
</s>
