<s>
Bacula	B-Language
is	O
an	O
open-source	O
,	O
enterprise-level	O
computer	O
backup	B-Protocol
system	O
for	O
heterogeneous	O
networks	O
.	O
</s>
<s>
It	O
is	O
designed	O
to	O
automate	O
backup	B-Protocol
tasks	O
that	O
had	O
often	O
required	O
intervention	O
from	O
a	O
systems	O
administrator	O
or	O
computer	O
operator	O
.	O
</s>
<s>
Bacula	B-Language
supports	O
Linux	B-Application
,	O
UNIX	B-Application
,	O
Windows	B-Application
,	O
and	O
macOS	B-Application
backup	B-Protocol
clients	O
,	O
and	O
a	O
range	O
of	O
professional	O
backup	B-Protocol
devices	I-Protocol
including	O
tape	O
libraries	O
.	O
</s>
<s>
Administrators	O
and	O
operators	O
can	O
configure	O
the	O
system	O
via	O
a	O
command	O
line	O
,	O
GUI	O
or	O
web	O
interface	O
;	O
its	O
back-end	O
is	O
a	O
catalog	O
of	O
information	O
stored	O
by	O
MySQL	B-Application
,	O
PostgreSQL	B-Application
,	O
or	O
SQLite	B-Language
.	O
</s>
<s>
Bacula	B-Language
is	O
a	O
set	O
of	O
computer	O
programs	O
for	O
managing	O
backup	B-Protocol
,	O
recovery	O
,	O
and	O
verification	O
of	O
computer	O
data	O
across	O
a	O
network	O
—	O
providing	O
a	O
backup	B-Protocol
solution	O
for	O
mixed	O
operating	O
system	O
environments	O
.	O
</s>
<s>
Bacula	B-Language
is	O
open-source	O
and	O
released	O
under	O
the	O
AGPL	B-Application
version	I-Application
3	I-Application
license	O
with	O
exceptions	O
to	O
permit	O
linking	O
with	O
OpenSSL	O
and	O
distributing	O
Windows	B-Application
binaries	O
.	O
</s>
<s>
Bacula	B-Language
is	O
available	O
under	O
a	O
"	O
dual	B-License
license	I-License
"	O
(	O
see	O
Multi-licensing	B-License
)	O
AGPLv3	B-Application
or	O
Proprietary	O
license	O
.	O
</s>
<s>
Several	O
entities	O
offer	O
commercial	O
support	O
for	O
the	O
AGPL	O
"	O
Bacula	B-Language
community	O
version	O
"	O
while	O
Bacula	B-Language
Systems	O
sells	O
various	O
levels	O
of	O
annual	O
support	O
contracts	O
for	O
"	O
Bacula	B-Language
Enterprise	O
Edition	O
"	O
,	O
which	O
contains	O
various	O
non-GPL	O
components	O
developed	O
in-house	O
.	O
</s>
<s>
In	O
2015	O
,	O
Bacula	B-Language
Systems	O
was	O
named	O
"	O
Top	O
20	O
Most	O
Promising	O
Data	O
Center	O
Solution	O
Providers	O
"	O
by	O
CIO	O
Review	O
.	O
</s>
<s>
In	O
common	O
with	O
other	O
dual-license	B-License
software	O
,	O
components	O
developed	O
for	O
the	O
Bacula	B-Language
Enterprise	O
Edition	O
are	O
released	O
into	O
Bacula	B-Language
Community	O
edition	O
after	O
some	O
period	O
of	O
exclusivity	O
to	O
the	O
proprietary	O
version	O
.	O
</s>
<s>
Since	O
April	O
2002	O
,	O
Bacula	B-Language
has	O
over	O
2	O
million	O
downloads	O
,	O
which	O
makes	O
it	O
the	O
most	O
downloaded	O
open-source	O
backup	B-Protocol
program	O
.	O
</s>
<s>
Bacula	B-Language
's	O
features	O
include	O
:	O
</s>
<s>
TCP/IP	O
–	O
client	B-Operating_System
–	I-Operating_System
server	I-Operating_System
communication	O
uses	O
standard	O
ports	O
and	O
services	O
instead	O
of	O
RPC	B-Operating_System
for	O
NFS	B-Protocol
,	O
SMB	B-Operating_System
,	O
etc	O
.	O
</s>
<s>
The	O
client	O
software	O
,	O
executed	O
by	O
a	O
"	O
file	O
daemon	O
"	O
running	O
on	O
a	O
Bacula	B-Language
client	O
,	O
supports	O
multiple	O
operating	O
systems	O
.	O
</s>
<s>
By	O
default	O
,	O
Bacula	B-Language
's	O
differential	O
and	O
incremental	O
backups	B-Protocol
are	O
based	O
on	O
system	O
time	O
stamps	O
.	O
</s>
<s>
Consequently	O
,	O
if	O
you	O
move	O
files	O
into	O
an	O
existing	O
directory	O
or	O
move	O
a	O
whole	O
directory	O
into	O
the	O
backup	B-Protocol
FileSet	O
after	O
a	O
full	B-Protocol
backup	I-Protocol
,	O
those	O
files	O
may	O
not	O
be	O
backed	O
up	O
by	O
an	O
incremental	O
save	O
because	O
they	O
may	O
have	O
old	O
dates	O
.	O
</s>
<s>
Bacula	B-Language
versions	O
starting	O
with	O
3.0	O
or	O
later	O
support	O
Accurate	O
backup	B-Protocol
,	O
which	O
is	O
an	O
option	O
that	O
addresses	O
this	O
issue	O
without	O
requiring	O
modification	O
of	O
the	O
files	O
timestamps	O
.	O
</s>
<s>
inode	O
comparisons	O
,	O
modification	O
times	O
or	O
md5/sha1	O
signatures	O
.	O
</s>
<s>
In	O
2011	O
,	O
Graham	O
Keeling	O
,	O
a	O
"	O
former	O
"	O
Bacula	B-Language
community	O
developer	O
,	O
released	O
a	O
friendly	O
fork	O
of	O
Bacula	B-Language
.	O
</s>
<s>
In	O
February	O
2013	O
a	O
former	O
Bacula	B-Language
community	O
developer	O
(	O
with	O
several	O
other	O
Free	O
Software	O
users	O
)	O
released	O
Bareos	O
as	O
a	O
fork	O
of	O
Bacula	B-Language
.	O
</s>
