<s>
Pydio	B-General_Concept
Cells	O
,	O
previously	O
known	O
as	O
just	O
Pydio	B-General_Concept
and	O
formerly	O
known	O
as	O
AjaXplorer	B-General_Concept
,	O
is	O
an	O
open-source	B-License
file-sharing	O
and	O
synchronisation	O
software	O
that	O
runs	O
on	O
the	O
user	O
's	O
own	O
server	B-Application
or	O
in	B-Architecture
the	I-Architecture
cloud	I-Architecture
.	O
</s>
<s>
The	O
project	O
was	O
created	O
by	O
musician	O
Charles	O
Du	O
Jeu	O
(	O
current	O
CEO	O
and	O
CTO	O
)	O
in	O
2007	O
under	O
the	O
name	O
AjaXplorer	B-General_Concept
.	O
</s>
<s>
The	O
name	O
was	O
changed	O
in	O
2013	O
and	O
became	O
Pydio	B-General_Concept
(	O
an	O
acronym	O
for	O
Put	O
Your	O
Data	O
in	O
Orbit	O
)	O
.	O
</s>
<s>
In	O
May	O
2018	O
,	O
Pydio	B-General_Concept
switched	O
from	O
PHP	B-Application
to	O
Go	B-Application
with	O
the	O
release	O
of	O
Pydio	B-General_Concept
Cells	O
.	O
</s>
<s>
The	O
PHP	B-Application
version	O
reached	O
end-of-life	O
state	O
on	O
31	O
December	O
2019	O
.	O
</s>
<s>
Pydio	B-General_Concept
Cells	O
runs	O
on	O
any	O
server	B-Application
supporting	O
a	O
recent	O
Go	B-Application
version	O
.	O
</s>
<s>
Windows/Linux/macOS	O
on	O
the	B-Device
Intel	I-Device
architecture	I-Device
are	O
directly	O
supported	O
;	O
a	O
fully	O
functional	O
working	O
ARM	B-Architecture
implementation	O
is	O
under	O
active	O
development	O
.	O
</s>
<s>
Pydio	B-General_Concept
Cells	O
has	O
been	O
developed	O
from	O
scratch	O
using	O
the	O
Go	B-Application
programming	I-Application
language	I-Application
;	O
release	O
4.0.0	O
introduced	O
code	O
refactoring	O
to	O
fully	O
support	O
the	O
Go	B-Application
modular	O
structure	O
as	O
well	O
as	O
grid	B-Architecture
computing	I-Architecture
.	O
</s>
<s>
Nevertheless	O
,	O
the	O
web-based	O
interface	O
of	O
Cells	O
is	O
very	O
similar	O
to	O
the	O
one	O
from	O
Pydio	B-General_Concept
8	O
(	O
in	O
PHP	B-Application
)	O
,	O
and	O
it	O
successfully	O
replicates	O
most	O
of	O
its	O
features	O
,	O
while	O
adding	O
a	O
few	O
more	O
.	O
</s>
<s>
There	O
is	O
also	O
a	O
new	O
synchronisation	O
client	O
(	O
also	O
written	O
in	O
Go	B-Application
)	O
.	O
</s>
<s>
The	O
PHP	B-Application
version	O
has	O
been	O
phased	O
out	O
as	O
the	O
company	O
's	O
focus	O
is	O
moving	O
to	O
Pydio	B-General_Concept
Cells	O
,	O
with	O
community	O
feedback	O
on	O
the	O
new	O
features	O
.	O
</s>
<s>
According	O
to	O
the	O
company	O
,	O
the	O
switch	O
to	O
the	O
new	O
environment	O
was	O
made	O
"	O
to	O
overcome	O
inherent	O
PHP	B-Application
limitations	O
and	O
provide	O
you	O
with	O
a	O
future-proof	O
and	O
modern	O
solution	O
for	O
collaborating	O
on	O
documents	O
"	O
.	O
</s>
<s>
From	O
a	O
technical	O
point	O
of	O
view	O
,	O
Pydio	B-General_Concept
differs	O
from	O
solutions	O
such	O
as	O
Google	B-Application
Drive	I-Application
or	O
Dropbox	B-Application
.	O
</s>
<s>
Pydio	B-General_Concept
is	O
not	O
based	O
on	O
a	O
public	O
cloud	B-Architecture
;	O
instead	O
,	O
the	O
software	O
connects	O
to	O
the	O
user	O
's	O
existing	O
storage	O
(	O
such	O
as	O
SAN	O
/	O
Local	O
FS	O
,	O
SAMBA	B-Language
/	O
CIFS	B-Operating_System
,	O
(	O
s	O
)	O
FTP	B-Protocol
,	O
NFS	B-Protocol
,	O
S3-compatible	B-General_Concept
cloud	B-Architecture
storage	O
,	O
Azure	O
Blob	O
Storage	O
,	O
Google	B-General_Concept
Cloud	I-General_Concept
Storage	I-General_Concept
)	O
as	O
well	O
as	O
to	O
the	O
existing	O
user	O
directories	O
(	O
LDAP	B-Protocol
/	O
AD	B-Protocol
,	O
OAuth2	O
/	O
OIDC	O
SSO	O
,	O
SAML	O
/	O
Azure	B-Device
ADFS	I-Device
SSO	O
,	O
RADIUS	B-Protocol
,	O
Shibboleth	O
...	O
)	O
,	O
which	O
allows	O
companies	O
to	O
keep	O
their	O
data	O
inside	O
their	O
infrastructure	O
,	O
according	O
to	O
their	O
data	O
security	O
policy	O
and	O
user	O
rights	O
management	O
.	O
</s>
<s>
The	O
software	O
is	O
built	O
in	O
a	O
modular	O
perspective	O
;	O
up	O
to	O
Pydio	B-General_Concept
8	O
,	O
various	O
plugins	O
allowed	O
administrators	O
to	O
implement	O
extra	O
features	O
.	O
</s>
<s>
On	O
the	O
server	B-Application
side	O
,	O
Pydio	B-General_Concept
Cells	O
is	O
deployed	O
as	O
a	O
collection	O
of	O
independent	O
microservices	O
communicating	O
among	O
themselves	O
using	O
gRPC	B-Application
and	O
logging	O
user	O
actions	O
via	O
Activity	O
Streams	O
2.0	O
(	O
AS2	O
)	O
.	O
</s>
<s>
Pydio	B-General_Concept
Cells	O
microservices	O
are	O
built	O
with	O
the	O
framework	O
(	O
using	O
an	O
embedded	O
server	B-Application
)	O
.	O
</s>
<s>
A	O
standard	O
installation	O
will	O
deploy	O
all	O
required	O
services	O
on	O
the	O
same	O
physical	O
server	B-Application
,	O
but	O
for	O
the	O
purposes	O
of	O
performance	O
,	O
reliability	O
and	O
high	O
availability	O
,	O
these	O
can	O
now	O
be	O
spread	O
across	O
several	O
different	O
servers	O
(	O
even	O
in	O
geographically	O
separate	O
locations	O
)	O
according	O
to	O
the	O
.	O
</s>
<s>
Pydio	B-General_Concept
Cells	O
is	O
available	O
either	O
through	O
a	O
free	O
and	O
open-source	B-License
community	O
distribution	O
(	O
Pydio	B-General_Concept
Cells	O
Home	O
)	O
,	O
or	O
a	O
commercially-licensed	O
enterprise	O
distribution	O
(	O
in	O
two	O
variants	O
,	O
Pydio	B-General_Concept
Cells	O
Connect	O
and	O
Pydio	B-General_Concept
Cells	O
Enterprise	O
)	O
,	O
which	O
add	O
features	O
not	O
available	O
in	O
the	O
community	O
distribution	O
as	O
well	O
as	O
additional	O
levels	O
of	O
support	O
beyond	O
the	O
community	O
forums	O
.	O
</s>
