<s>
ejabberd	B-Protocol
is	O
an	O
Extensible	B-Protocol
Messaging	I-Protocol
and	I-Protocol
Presence	I-Protocol
Protocol	I-Protocol
(	O
XMPP	B-Protocol
)	O
application	O
server	B-Application
and	O
an	O
MQ	B-Application
Telemetry	I-Application
Transport	I-Application
(	O
MQTT	B-Application
)	O
broker	O
,	O
written	O
mainly	O
in	O
the	O
Erlang	B-Operating_System
programming	I-Operating_System
language	I-Operating_System
.	O
</s>
<s>
It	O
can	O
run	O
under	O
several	O
Unix-like	B-Operating_System
operating	I-Operating_System
systems	I-Operating_System
such	O
as	O
macOS	B-Operating_System
,	O
Linux	B-Application
,	O
FreeBSD	B-Operating_System
,	O
NetBSD	B-Device
,	O
OpenBSD	B-Operating_System
and	O
OpenSolaris	B-Operating_System
.	O
</s>
<s>
Additionally	O
,	O
ejabberd	B-Protocol
can	O
run	O
under	O
Microsoft	B-Application
Windows	I-Application
.	O
</s>
<s>
The	O
name	O
ejabberd	B-Protocol
stands	O
for	O
Erlang	B-Operating_System
Jabber	B-Protocol
Daemon	B-Operating_System
(	O
Jabber	B-Protocol
being	O
a	O
former	O
name	O
for	O
XMPP	B-Protocol
)	O
and	O
is	O
written	O
in	O
lowercase	O
only	O
,	O
as	O
is	O
common	O
for	O
daemon	B-Operating_System
software	O
.	O
</s>
<s>
ejabberd	B-Protocol
is	O
free	B-Application
software	I-Application
,	O
distributed	O
under	O
the	O
terms	O
of	O
the	O
GNU	B-License
GPL-2.0-or-later	I-License
.	O
</s>
<s>
,	O
it	O
is	O
one	O
of	O
the	O
most	O
popular	O
open	O
source	O
applications	O
written	O
in	O
Erlang	B-Operating_System
.	O
</s>
<s>
XMPP	B-Protocol
:	I-Protocol
The	O
Definitive	O
Guide	O
(	O
O'Reilly	O
Media	O
,	O
2009	O
)	O
praised	O
ejabberd	B-Protocol
for	O
its	O
scalability	O
and	O
clustering	B-Architecture
feature	O
,	O
at	O
the	O
same	O
time	O
pointing	O
out	O
that	O
being	O
written	O
in	O
Erlang	B-Operating_System
is	O
a	O
potential	O
acceptance	O
issue	O
for	O
users	O
and	O
contributors	O
.	O
</s>
<s>
The	O
software	O
's	O
creator	O
,	O
Alexey	O
Shchepin	O
was	O
awarded	O
the	O
Erlang	B-Operating_System
User	O
of	O
the	O
Year	O
award	O
at	O
the	O
2006	O
Erlang	B-Operating_System
user	O
conference	O
.	O
</s>
<s>
ejabberd	B-Protocol
has	O
a	O
number	O
of	O
notable	O
deployments	O
,	O
IETF	O
Groupchat	O
Service	O
,	O
BBC	O
Radio	O
LiveText	O
,	O
Nokia	O
's	O
Ovi	B-Application
,	O
KDE	B-Application
Talk	O
and	O
one	O
in	O
development	O
at	O
Facebook	B-Application
.	I-Application
</s>
<s>
ejabberd	B-Protocol
is	O
the	O
most	O
popular	O
server	B-Application
among	O
smaller	O
XMPP-powered	O
sites	O
that	O
register	O
on	O
xmpp.org	O
.	O
</s>
<s>
With	O
the	O
next	O
major	O
release	O
after	O
version	O
2	O
(	O
previously	O
called	O
ejabberd	B-Protocol
3	O
)	O
,	O
the	O
versioning	O
scheme	O
was	O
changed	O
to	O
reflect	O
release	O
dates	O
as	O
"	O
Year.Month-Revision	O
"	O
(	O
starting	O
with	O
13.04-beta1	O
)	O
.	O
</s>
<s>
It	O
was	O
also	O
announced	O
that	O
further	O
development	O
will	O
be	O
split	O
into	O
an	O
"	O
ejabberd	B-Protocol
Community	O
Server	B-Application
"	O
and	O
an	O
"	O
ejabberd	B-Protocol
Commercial	O
Edition	O
 [ which ] 	O
targets	O
carriers	O
,	O
websites	O
,	O
service	O
providers	O
,	O
large	O
corporations	O
,	O
universities	O
,	O
game	O
companies	O
,	O
that	O
need	O
high	O
level	O
of	O
commitment	O
from	O
ProcessOne	O
,	O
stability	O
and	O
performance	O
and	O
a	O
unique	O
set	O
of	O
features	O
to	O
run	O
their	O
business	O
successfully.	O
"	O
</s>
<s>
Alexey	O
Shchepin	O
started	O
ejabberd	B-Protocol
in	O
November	O
2002	O
for	O
three	O
main	O
reasons	O
:	O
success	O
with	O
Tkabber	B-Protocol
(	O
his	O
previous	O
project	O
,	O
an	O
XMPP	B-Protocol
client	O
)	O
,	O
a	O
rather	O
unstable	O
first	O
alpha	O
release	O
of	O
jabberd2	B-Protocol
,	O
and	O
his	O
wish	O
to	O
play	O
with	O
Erlang	B-Operating_System
features	O
.	O
</s>
<s>
Shchepin	O
has	O
stated	O
that	O
he	O
would	O
have	O
not	O
started	O
ejabberd	B-Protocol
without	O
Erlang	B-Operating_System
.	O
</s>
<s>
Ejabberd	B-Protocol
hit	O
version	O
1.0	O
in	O
December	O
2005	O
.	O
</s>
<s>
ejabberd	B-Protocol
has	O
a	O
high	O
level	O
of	O
compliance	O
with	O
XMPP	B-Protocol
.	O
</s>
<s>
It	O
provides	O
a	O
web	O
interface	O
which	O
can	O
be	O
translated	B-General_Concept
into	O
other	O
languages	O
.	O
</s>
<s>
ejabberd	B-Protocol
supports	O
distributed	B-Architecture
computing	I-Architecture
by	O
clustering	B-Architecture
,	O
supports	O
live	O
upgrades	O
,	O
shared	O
roster	O
groups	O
and	O
provides	O
support	O
for	O
virtual	O
hosts	O
.	O
</s>
<s>
Database	B-Application
management	I-Application
systems	I-Application
supported	O
include	O
PostgreSQL	B-Application
and	O
MySQL	B-Application
,	O
and	O
ODBC	B-Application
is	O
supported	O
for	O
connectivity	O
to	O
other	O
systems	O
.	O
</s>
<s>
LDAP	B-Protocol
authentication	O
is	O
supported	O
,	O
as	O
is	O
login	O
via	O
SSL/TLS	B-Protocol
,	O
SASL	O
and	O
STARTTLS	B-Protocol
.	O
</s>
<s>
ejabberd	B-Protocol
is	O
extensible	B-Architecture
via	O
modules	O
,	O
which	O
can	O
provide	O
support	O
for	O
additional	O
capabilities	O
such	O
as	O
saving	O
offline	O
messages	O
,	O
connecting	O
with	O
IRC	B-Protocol
channels	O
,	O
or	O
a	O
user	O
database	O
which	O
makes	O
use	O
of	O
user	O
's	O
vCards	O
(	O
saving	O
vCards	O
in	O
LDAP	B-Protocol
or	O
an	O
ODBC	B-Application
compatible	O
database	O
is	O
possible	O
with	O
other	O
modules	O
)	O
.	O
</s>
<s>
In	O
addition	O
,	O
modules	O
can	O
provide	O
support	O
for	O
extensions	O
of	O
the	O
XMPP	B-Protocol
protocol	I-Protocol
,	O
such	O
as	O
MUC	B-Protocol
,	O
HTTP	O
polling	O
,	O
Publish-Subscribe	O
,	O
and	O
gathering	O
statistics	O
via	O
XMPP	B-Protocol
.	O
</s>
<s>
Starting	O
with	O
version	O
2.0.0	O
ejabberd	B-Protocol
also	O
includes	O
support	O
for	O
the	O
Proxy65	O
file	O
transfer	O
proxy	O
which	O
enabled	O
Jabber/XMPP	O
users	O
behind	O
firewalls	O
to	O
share	O
files	O
through	O
a	O
SOCKS	B-Application
5	I-Application
proxy	O
.	O
</s>
<s>
ejabberd	B-Protocol
can	O
communicate	O
with	O
other	O
XMPP	B-Protocol
servers	O
and	O
with	O
non-XMPP	O
instant	B-Application
messaging	I-Application
networks	O
as	O
well	O
,	O
using	O
a	O
special	O
type	O
of	O
XMPP	B-Protocol
component	O
called	O
transport	O
or	O
gateway	O
.	O
</s>
<s>
In	O
addition	O
to	O
the	O
source	O
code	O
package	O
and	O
binary	O
installers	O
for	O
Linux	B-Application
,	O
macOS	B-Operating_System
,	O
and	O
Windows	O
,	O
ejabberd	B-Protocol
is	O
also	O
available	O
in	O
several	O
operating	O
system	O
distributions	O
as	O
is	O
typical	O
in	O
FOSS	B-License
,	O
including	O
Debian	O
,	O
Fedora	O
,	O
Gentoo	B-Application
,	O
Ubuntu	B-Operating_System
,	O
Arch	O
Linux	B-Application
,	O
OpenSolaris	B-Operating_System
,	O
FreeBSD	B-Application
Ports	I-Application
,	O
OpenBSD	B-Operating_System
ports	O
,	O
NetBSD	B-Device
port	O
and	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
's	O
Fink	B-Application
.	O
</s>
<s>
Other	O
methods	O
in	O
which	O
ejabberd	B-Protocol
is	O
available	O
are	O
the	O
TurnKey	B-General_Concept
Linux	I-General_Concept
Virtual	I-General_Concept
Appliance	I-General_Concept
Library	I-General_Concept
and	O
Comprehensive	O
Erlang	B-Operating_System
Archive	O
Network	O
(	O
CEAN	O
)	O
.	O
</s>
<s>
An	O
old	O
version	O
of	O
ejabberd	B-Protocol
is	O
included	O
in	O
the	O
Unison	O
unified	O
communications	O
software	O
.	O
</s>
<s>
ejabberd	B-Protocol
is	O
known	O
to	O
be	O
used	O
by	O
XMPP-related	O
sites	O
and	O
a	O
number	O
of	O
companies	O
,	O
either	O
for	O
providing	O
an	O
XMPP	B-Protocol
instant	B-Application
messaging	I-Application
service	O
,	O
as	O
a	O
meeting	O
chat	O
room	O
service	O
,	O
or	O
as	O
middleware	O
for	O
other	O
software	O
(	O
usually	O
by	O
means	O
of	O
the	O
Publish-Subscribe	O
service	O
)	O
.	O
</s>
<s>
XMPP	B-Protocol
servers	O
deployed	O
for	O
XMPP-related	O
sites	O
are	O
usually	O
run	O
using	O
ejabberd	B-Protocol
,	O
both	O
in	O
case	O
of	O
large	O
and	O
small	O
servers	O
.	O
</s>
<s>
One	O
large	O
public	O
XMPP	B-Protocol
servers	O
runs	O
ejabberd	B-Protocol
:	O
the	O
Russian	O
jabber.ru,	O
that	O
handles	O
between	O
10,000	O
and	O
20,000	O
concurrent	O
users	O
at	O
any	O
time	O
.	O
</s>
<s>
Among	O
smaller	O
XMPP-related	O
sites	O
,	O
ejabberd	B-Protocol
is	O
also	O
the	O
most	O
popular	O
server	B-Application
.	O
</s>
<s>
When	O
not	O
taking	O
into	O
account	O
the	O
size	O
or	O
nature	O
of	O
the	O
server	B-Application
,	O
ejabberd	B-Protocol
is	O
also	O
the	O
most	O
widely	O
deployed	O
:	O
according	O
to	O
IMtrends	O
report	O
from	O
July	O
2008	O
based	O
in	O
automated	O
server	B-Application
detection	O
,	O
37%	O
of	O
7292	O
servers	O
were	O
running	O
ejabberd	B-Protocol
;	O
the	O
second	O
position	O
being	O
jabberd14	O
with	O
22.4	O
%	O
and	O
the	O
third	O
Openfire	B-Language
with	O
18.4	O
%	O
.	O
</s>
<s>
Among	O
generic	O
instant	B-Application
messaging	I-Application
deployments	O
are	O
ISPs	O
like	O
the	O
Portuguese	O
SAPO	O
,	O
and	O
the	O
German	O
United	O
Internet	O
for	O
services	O
like	O
GMX	O
and	O
Web.de	O
.	O
</s>
<s>
The	O
Russian	O
search	O
engine	O
Yandex	O
uses	O
a	O
highly	O
modified	O
version	O
of	O
ejabberd	B-Protocol
,	O
named	O
Yabberd	O
.	O
</s>
<s>
Nokia	O
's	O
Ovi	B-Application
uses	O
ejabberd	B-Protocol
with	O
some	O
customizations	O
.	O
</s>
<s>
Major	B-Application
League	I-Application
Baseball	I-Application
offers	O
instant	B-Application
messaging	I-Application
and	O
chatrooms	O
using	O
a	O
customized	O
ejabberd	B-Protocol
.	O
</s>
<s>
Mxit	B-Protocol
was	O
a	O
large	O
server	B-Application
for	O
mobile	O
instant	B-Application
messaging	I-Application
client	O
that	O
started	O
using	O
ejabberd	B-Protocol
in	O
2005	O
,	O
but	O
was	O
replaced	O
with	O
a	O
custom	O
IM	O
engine	O
.	O
</s>
<s>
Universities	O
known	O
to	O
use	O
ejabberd	B-Protocol
include	O
:	O
Saint	O
Petersburg	O
State	O
University	O
,	O
Taganrog	O
State	O
University	O
and	O
the	O
Division	O
of	O
Information	O
Technology	O
of	O
the	O
University	O
of	O
Wisconsin	O
–	O
Madison	O
.	O
</s>
<s>
In	O
the	O
FOSS	B-License
world	O
,	O
there	O
is	O
a	O
pair	O
of	O
notable	O
generic	O
deployments	O
of	O
ejabberd	B-Protocol
,	O
namely	O
the	O
KDE	B-Application
Talk	O
and	O
the	O
Fellowship	O
of	O
the	O
Free	B-Application
Software	I-Application
Foundation	O
Europe	O
.	O
</s>
<s>
ejabberd	B-Protocol
chatroom	O
feature	O
provides	O
the	O
IETF	O
Groupchat	O
Service	O
,	O
used	O
by	O
the	O
various	O
working	O
groups	O
,	O
areas	O
,	O
and	O
BOF	O
sessions	O
during	O
meetings	O
and	O
at	O
other	O
times	O
.	O
</s>
<s>
Other	O
deployments	O
use	O
ejabberd	B-Protocol
in	O
more	O
novel	O
ways	O
.	O
</s>
<s>
For	O
instance	O
,	O
BBC	O
Radio	O
LiveText	O
uses	O
ejabberd	B-Protocol
's	O
Publish-Subscribe	O
service	O
to	O
synchronously	O
broadcast	O
text	O
content	O
with	O
the	O
radio	O
stream	O
.	O
</s>
<s>
sameplace.cc	O
is	O
a	O
Mozilla	B-Application
Firefox	I-Application
extension	O
that	O
integrates	O
Jabber/XMPP	O
in	O
the	O
web	O
browser	O
,	O
and	O
uses	O
ejabberd	B-Protocol
for	O
the	O
XMPP	B-Protocol
server	B-Application
.	O
</s>
<s>
One	O
Laptop	O
per	O
Child	O
's	O
School	O
server	B-Application
uses	O
ejabberd	B-Protocol
with	O
OLPC-specific	O
patches	O
as	O
the	O
instant	B-Application
messaging	I-Application
server	B-Application
.	O
</s>
<s>
In	O
2008	O
Facebook	B-Application
announced	O
that	O
they	O
will	O
support	O
XMPP	B-Protocol
for	O
their	O
chat	O
service	O
.	O
</s>
<s>
Facebook	B-Application
developers	O
made	O
a	O
presentation	O
on	O
the	O
topic	O
at	O
Commercial	O
Users	O
of	O
Functional	O
Programming	O
(	O
CUFP	O
)	O
2009	O
conference	O
,	O
and	O
in	O
November	O
2009	O
chat.facebook.com	O
was	O
detected	O
as	O
running	O
a	O
modified	O
version	O
of	O
ejabberd	B-Protocol
.	O
</s>
<s>
On	O
Feb	O
10th	O
2010	O
,	O
the	B-Application
Facebook	I-Application
blog	O
announced	O
the	O
opening	O
of	O
the	O
XMPP	B-Protocol
interface	O
to	O
Facebook	B-Application
chat	O
,	O
based	O
on	O
ejabberd	B-Protocol
.	O
</s>
<s>
Another	O
social	O
media	O
and	O
blogging	O
service	O
that	O
uses	O
ejabberd	B-Protocol
is	O
LiveJournal	B-Application
Talk	O
.	O
</s>
<s>
The	O
Spanish-focused	O
Tuenti	O
social	O
network	O
uses	O
a	O
modified	O
ejabberd	B-Protocol
to	O
provide	O
a	O
live	O
chat	O
service	O
.	O
</s>
<s>
The	O
worldwide	O
jabber.org	O
XMPP	B-Protocol
server	B-Application
,	O
with	O
a	O
userbase	O
of	O
330,000	O
users	O
and	O
15,000	O
users	O
online	O
at	O
any	O
one	O
time	O
in	O
December	O
2009	O
,	O
have	O
used	O
ejabberd	B-Protocol
since	O
February	O
2006	O
until	O
January	O
2010	O
.	O
</s>
<s>
(	O
In	O
2010	O
Jabber.org	O
migrated	O
to	O
M-Link	O
XMPP	B-Protocol
server	B-Application
from	O
Isode	O
Limited	O
.	O
)	O
</s>
<s>
Nintendo	B-Application
Switch	I-Application
uses	O
ejabberd	B-Protocol
in	O
its	O
"	O
Nintendo	B-Application
Switch	I-Application
Push	O
Notification	O
infrastructure	O
"	O
(	O
NPNS	O
)	O
handling	O
10	O
million	O
simultaneous	O
connections	O
.	O
</s>
<s>
Two	O
articles	O
are	O
published	O
about	O
ejabberd	B-Protocol
in	O
magazines	O
:	O
"	O
Démarrer	O
avec	O
ejabberd	B-Protocol
"	O
in	O
the	O
French	O
magazine	O
PROgrammez	O
!	O
</s>
<s>
and	O
"	O
Passing	O
notes	O
in	O
class	O
"	O
,	O
a	O
post	O
in	O
Free	B-Application
Software	I-Application
Magazine	I-Application
.	O
</s>
<s>
Computerworld	O
Australia	O
interviewed	O
Erlang	B-Operating_System
creator	O
Joe	O
Armstrong	O
in	O
June	O
2009	O
,	O
and	O
he	O
referred	O
to	O
ejabberd	B-Protocol
in	O
this	O
way	O
:	O
</s>
<s>
Q	O
:	O
"	O
What	O
's	O
the	O
most	O
interesting	O
program(s )	O
you	O
've	O
seen	O
written	O
with	O
Erlang	B-Operating_System
for	O
business	O
?	O
"	O
</s>
<s>
Possibly	O
Ejabberd	B-Protocol
which	O
is	O
an	O
open-source	O
Jabber/XMPP	O
instant	B-Application
messaging	I-Application
server	B-Application
.	O
</s>
<s>
Ejabberd	B-Protocol
appears	O
to	O
be	O
the	O
market	O
leading	O
XMPP	B-Protocol
server	B-Application
and	O
things	O
like	O
Google	O
Wave	O
which	O
runs	O
on	O
top	O
of	O
XMPP	B-Protocol
will	O
probably	O
attract	O
a	O
lot	O
of	O
people	O
into	O
building	O
applications	O
on	O
XMPP	B-Protocol
servers.	O
"	O
</s>
<s>
Builder	O
Australia	O
interviewed	O
Andre	O
Pang	O
in	O
September	O
2007	O
,	O
and	O
referred	O
to	O
ejabberd	B-Protocol
in	O
those	O
terms	O
:	O
"	O
the	O
apps	O
that	O
Erlang	B-Operating_System
is	O
suited	O
for	O
really	O
are	O
n't	O
CPU	O
bound	O
that	O
often	O
,	O
if	O
you	O
look	O
at	O
ejabberd	B-Protocol
,	O
it	O
serves	O
some	O
absolutely	O
crazy	O
amount	O
of	O
concurrent	O
connections	O
,	O
well	O
over	O
100	O
,	O
000	O
,	O
and	O
they	O
're	O
running	O
it	O
on	O
,	O
I	O
'm	O
not	O
sure	O
,	O
but	O
it	O
's	O
something	O
like	O
a	O
Quad	O
core	O
XEON	O
machine.	O
"	O
</s>
<s>
ejabberd	B-Protocol
is	O
mentioned	O
in	O
several	O
books	O
related	O
to	O
the	O
XMPP	B-Protocol
protocol	I-Protocol
and	O
the	O
Erlang	B-Operating_System
language	I-Operating_System
.	O
</s>
<s>
XMPP	B-Protocol
:	I-Protocol
The	O
Definitive	O
Guide	O
(	O
O'Reilly	O
Media	O
,	O
2009	O
)	O
refers	O
to	O
ejabberd	B-Protocol
in	O
those	O
terms	O
:	O
The	O
server	B-Application
is	O
well-known	O
for	O
its	O
scalability	O
,	O
and	O
it	O
can	O
be	O
clustered	O
across	O
multiple	O
instances	O
.	O
</s>
<s>
A	O
2006	O
internal	O
review	O
paper	O
in	O
the	O
IT	O
department	O
of	O
Cambridge	O
University	O
found	O
it	O
the	O
best	O
choice	O
amongst	O
Jabber	B-Protocol
servers	O
.	O
</s>
<s>
In	O
the	O
same	O
year	O
Alexey	O
Shchepin	O
was	O
awarded	O
the	O
"	O
User	O
of	O
the	O
Year	O
"	O
award	O
at	O
the	O
12th	O
International	O
Erlang/OTP	B-Operating_System
User	O
Conference	O
.	O
</s>
<s>
Other	O
published	O
books	O
that	O
mention	O
ejabberd	B-Protocol
are	O
:	O
</s>
<s>
ejabberd	B-Protocol
was	O
used	O
in	O
research	O
works	O
of	O
papers	O
published	O
in	O
international	O
conferences	O
proceedings	O
and	O
journals	O
:	O
</s>
<s>
There	O
are	O
four	O
patent	O
applications	O
published	O
in	O
the	O
United	O
States	O
Patent	O
and	O
Trademark	O
Office	O
that	O
involve	O
ejabberd	B-Protocol
:	O
</s>
