<s>
Globule	B-Application
was	O
an	O
open-source	O
collaborative	O
content	B-Operating_System
delivery	I-Operating_System
network	I-Operating_System
developed	O
at	O
the	O
Vrije	O
Universiteit	O
in	O
Amsterdam	O
since	O
2006	O
.	O
</s>
<s>
It	O
is	O
implemented	O
as	O
a	O
third-party	O
module	O
for	O
the	O
Apache	B-Application
HTTP	I-Application
Server	I-Application
that	O
allows	O
any	O
given	O
server	O
to	O
replicate	O
its	O
documents	O
to	O
other	O
Globule	B-Application
servers	O
.	O
</s>
<s>
This	O
can	O
improve	O
the	O
site	O
's	O
performance	O
,	O
maintain	O
the	O
site	O
available	O
to	O
its	O
clients	O
even	O
if	O
some	O
servers	O
are	O
down	O
,	O
and	O
to	O
a	O
certain	O
extent	O
help	O
to	O
resist	O
to	O
flash	B-General_Concept
crowds	I-General_Concept
and	O
the	O
Slashdot	B-General_Concept
effect	I-General_Concept
.	O
</s>
<s>
Globule	B-Application
takes	O
care	O
of	O
maintaining	O
consistency	O
between	O
the	O
replicas	O
,	O
monitoring	O
the	O
servers	O
,	O
and	O
automatically	O
redirecting	O
clients	O
to	O
one	O
of	O
the	O
available	O
replicas	O
.	O
</s>
<s>
Globule	B-Application
also	O
supports	O
the	O
replication	O
of	O
PHP	B-Application
documents	O
accessing	O
MySQL	B-Application
databases	O
.	O
</s>
