<s>
FlockDB	B-Language
is	O
an	O
open-source	B-Application
distributed	O
,	O
fault-tolerant	B-General_Concept
graph	B-Application
database	I-Application
for	O
managing	O
wide	O
but	O
shallow	O
network	O
graphs	O
.	O
</s>
<s>
It	O
was	O
initially	O
used	O
by	O
Twitter	B-Application
to	O
store	O
relationships	O
between	O
users	O
,	O
e.g.	O
</s>
<s>
FlockDB	B-Language
differs	O
from	O
other	O
graph	B-Application
databases	I-Application
,	O
e.g.	O
</s>
<s>
Neo4j	B-Language
in	O
that	O
it	O
is	O
not	O
designed	O
for	O
multi-hop	O
graph	O
traversal	O
but	O
rather	O
for	O
rapid	O
set	O
operations	O
,	O
not	O
unlike	O
the	O
primary	O
use-case	O
for	O
Redis	B-Operating_System
sets	O
.	O
</s>
<s>
Since	O
it	O
is	O
still	O
in	O
the	O
process	O
of	O
being	O
packaged	O
for	O
outside	O
of	O
Twitter	B-Application
use	O
,	O
the	O
code	O
is	O
still	O
very	O
rough	O
and	O
hence	O
there	O
is	O
no	O
stable	O
release	O
available	O
yet	O
.	O
</s>
<s>
FlockDB	B-Language
was	O
posted	O
on	O
GitHub	B-Application
shortly	O
after	O
Twitter	B-Application
released	O
its	O
Gizzard	B-Language
framework	I-Language
,	O
which	O
it	O
uses	O
to	O
query	B-Library
the	O
FlockDB	B-Language
distributed	O
datastore	B-General_Concept
.	O
</s>
<s>
The	O
database	O
is	O
licensed	O
under	O
the	O
Apache	B-Application
License	I-Application
.	O
</s>
<s>
Twitter	B-Application
no	O
longer	O
supports	O
FlockDB	B-Language
.	O
</s>
