<s>
Btrieve	B-Application
is	O
a	O
transactional	O
database	O
(	O
navigational	B-General_Concept
database	I-General_Concept
)	O
software	O
product	O
.	O
</s>
<s>
It	O
is	O
based	O
on	O
Indexed	B-Application
Sequential	I-Application
Access	I-Application
Method	I-Application
(	O
ISAM	B-Application
)	O
,	O
which	O
is	O
a	O
way	O
of	O
storing	O
data	O
for	O
fast	O
retrieval	O
.	O
</s>
<s>
There	O
have	O
been	O
several	O
versions	O
of	O
the	O
product	O
for	O
DOS	B-Device
,	O
Linux	B-Application
,	O
older	O
versions	O
of	O
Microsoft	B-Application
Windows	I-Application
,	O
32-bit	O
IBM	B-Application
OS/2	I-Application
and	O
for	O
Novell	B-Operating_System
NetWare	I-Operating_System
.	O
</s>
<s>
Btrieve	B-Application
was	O
written	O
by	O
Doug	O
Woodward	O
and	O
Nancy	O
Woodward	O
and	O
initial	O
funding	O
was	O
provided	O
in	O
part	O
by	O
Doug	O
's	O
brother	O
Loyd	O
Woodward	O
.	O
</s>
<s>
Around	O
the	O
same	O
time	O
as	O
the	O
release	O
of	O
the	O
first	O
IBM	B-Device
PCs	I-Device
,	O
Doug	O
received	O
50%	O
of	O
the	O
company	O
as	O
a	O
wedding	O
gift	O
and	O
later	O
purchased	O
the	O
remainder	O
from	O
his	O
brother	O
.	O
</s>
<s>
After	O
gaining	O
market	O
share	O
and	O
popularity	O
,	O
it	O
was	O
acquired	O
from	O
Doug	O
and	O
Nancy	O
Woodward	O
by	O
Novell	O
in	O
1987	O
,	O
for	O
integration	O
into	O
their	O
NetWare	B-Operating_System
operating	B-General_Concept
system	I-General_Concept
in	O
addition	O
to	O
continuing	O
with	O
the	O
DOS	B-Device
version	O
.	O
</s>
<s>
The	O
product	O
gained	O
significant	O
market	O
share	O
as	O
a	O
database	O
embedded	O
in	O
mid-market	O
applications	O
in	O
addition	O
to	O
being	O
embedded	O
in	O
every	O
copy	O
of	O
NetWare	B-Operating_System
2.x	O
,	O
3.x	O
and	O
4.x	O
since	O
it	O
was	O
available	O
on	O
every	O
NetWare	B-Operating_System
network	B-Architecture
.	O
</s>
<s>
After	O
some	O
reorganization	O
within	O
Novell	O
,	O
it	O
was	O
decided	O
in	O
1994	O
to	O
spin	O
off	O
the	O
product	O
and	O
technology	O
to	O
Doug	O
and	O
Nancy	O
Woodward	O
along	O
with	O
Ron	O
Harris	O
,	O
to	O
be	O
developed	O
by	O
a	O
new	O
company	O
known	O
as	O
Btrieve	B-Application
Technologies	I-Application
,	I-Application
Inc	I-Application
.	I-Application
(	O
BTI	O
)	O
.	O
</s>
<s>
Btrieve	B-Application
was	O
modularized	O
starting	O
with	O
version	O
6.15	O
and	O
became	O
one	O
of	O
two	O
database	O
front-ends	B-General_Concept
that	O
plugged	O
into	O
a	O
standard	O
software	B-Application
interface	I-Application
called	O
the	O
MicroKernel	O
Database	B-General_Concept
Engine	I-General_Concept
.	O
</s>
<s>
The	O
Btrieve	B-Application
front-end	O
supported	O
the	O
Btrieve	B-Application
API	B-Application
and	O
the	O
other	O
front-end	O
was	O
called	O
Scalable	O
SQL	B-Language
,	O
a	O
relational	B-Application
database	I-Application
product	O
based	O
upon	O
the	O
MKDE	O
that	O
used	O
its	O
own	O
variety	O
of	O
Structured	B-Language
Query	I-Language
Language	I-Language
,	O
otherwise	O
known	O
as	O
SQL	B-Language
.	O
</s>
<s>
After	O
these	O
versions	O
were	O
released	O
(	O
Btrieve	B-Application
6.15	O
and	O
ScalableSQL	O
v4	O
)	O
the	O
company	O
was	O
renamed	O
to	O
Pervasive	O
Software	O
prior	O
to	O
their	O
IPO	O
.	O
</s>
<s>
Shortly	O
thereafter	O
the	O
Btrieve	B-Application
and	O
ScalableSQL	O
products	O
were	O
combined	O
into	O
the	O
products	O
sold	O
as	O
Pervasive.SQL	B-Application
or	I-Application
PSQL	I-Application
,	O
and	O
later	O
Actian	B-Application
Zen	I-Application
.	O
</s>
<s>
Btrieve	B-Application
continued	O
for	O
a	O
few	O
years	O
while	O
ScalableSQL	O
was	O
quickly	O
dropped	O
.	O
</s>
<s>
Customers	O
were	O
encouraged	O
to	O
upgrade	O
to	O
Pervasive.SQL	O
,	O
which	O
supported	O
both	O
SQL	B-Language
and	O
Btrieve	B-Application
applications	O
.	O
</s>
<s>
Btrieve	B-Application
is	O
not	O
a	O
relational	B-Application
database	I-Application
management	I-Application
system	I-Application
(	O
RDBMS	O
)	O
.	O
</s>
<s>
Early	O
descriptions	O
of	O
Btrieve	B-Application
referred	O
to	O
it	O
as	O
a	O
record	O
manager	O
(	O
though	O
Pervasive	O
initially	O
used	O
the	O
term	O
navigational	B-General_Concept
database	I-General_Concept
but	O
later	O
changed	O
this	O
to	O
transactional	O
database	O
)	O
because	O
it	O
only	O
deals	O
with	O
the	O
underlying	O
record	O
creation	O
,	O
data	O
retrieval	O
,	O
record	O
updating	O
and	O
data	O
deletion	O
primitives	O
.	O
</s>
<s>
It	O
uses	O
ISAM	B-Application
as	O
its	O
underlying	O
indexing	O
and	O
storage	O
mechanism	O
.	O
</s>
<s>
A	O
key	O
part	O
of	O
Pervasive	O
's	O
architecture	O
is	O
the	O
use	O
of	O
a	O
MicroKernel	O
Database	B-General_Concept
Engine	I-General_Concept
,	O
which	O
allows	O
different	O
database	B-Application
backends	I-Application
to	O
be	O
modularised	O
and	O
integrated	O
easily	O
into	O
their	O
DBMS	O
package	O
,	O
Pervasive.SQL	O
.	O
</s>
<s>
This	O
has	O
enabled	O
them	O
to	O
support	O
both	O
their	O
Btrieve	B-Application
navigational	B-General_Concept
database	I-General_Concept
engine	O
and	O
an	O
SQL-based	O
engine	O
,	O
Scalable	O
SQL	B-Language
.	O
</s>
<s>
Current	O
versions	O
of	O
Btrieve	B-Application
support	O
system	O
transactions	O
and	O
user	O
transactions	O
,	O
where	O
system	O
transactions	O
are	O
a	O
bundle	O
of	O
non-transactional	O
operations	O
and/or	O
user	O
transactions	O
,	O
whereas	O
user	O
transactions	O
are	O
transactions	O
that	O
work	O
on	O
actual	O
data	O
in	O
the	O
database	O
.	O
</s>
<s>
The	O
Btrieve	B-Application
file	O
format	O
consists	O
entirely	O
of	O
pages	O
,	O
which	O
are	O
the	O
data	O
that	O
move	O
between	O
memory	O
and	O
storage	O
when	O
the	O
engine	O
performs	O
an	O
input/output	B-General_Concept
operation	O
.	O
</s>
<s>
The	O
file	O
control	O
record	O
contains	O
important	O
information	O
about	O
Btrieve	B-Application
files	O
,	O
such	O
as	O
the	O
number	O
of	O
pages	O
in	O
current	O
use	O
.	O
</s>
<s>
To	O
avoid	O
database	O
corruption	O
,	O
Btrieve	B-Application
uses	O
two	O
methods	O
of	O
updating	O
records	O
:	O
pre-image	O
paging	O
in	O
Btrieve	B-Application
versions	O
before	O
6.0	O
,	O
and	O
shadow	O
paging	O
in	O
subsequent	O
versions	O
.	O
</s>
<s>
Btrieve	B-Application
has	O
been	O
owned	O
and	O
developed	O
by	O
four	O
different	O
companies	O
:	O
SoftCraft	O
,	O
Novell	O
,	O
Btrieve	B-Application
Technologies	I-Application
,	I-Application
Inc	I-Application
.	I-Application
(	O
later	O
renamed	O
Pervasive	O
Software	O
)	O
,	O
and	O
Actian	O
Corporation	O
.	O
</s>
<s>
Pervasive	O
Software	O
set	O
up	O
a	O
"	O
Btrieve	B-Application
Society	O
"	O
to	O
recognise	O
existing	O
developers	O
.	O
</s>
<s>
Under	O
DOS	B-Device
,	O
Btrieve	B-Application
up	O
to	O
version	O
5	O
,	O
was	O
a	O
terminate-and-stay-resident	O
program	O
(	O
TSR	O
)	O
which	O
functioned	O
as	O
an	O
application	B-Application
programming	I-Application
interface	I-Application
(	O
API	B-Application
)	O
database	B-General_Concept
engine	I-General_Concept
,	O
supplying	O
applications	O
programs	O
with	O
function	O
calls	O
to	O
implement	O
a	O
multi-user	O
database	O
with	O
record	B-Operating_System
locking	I-Operating_System
.	O
</s>
<s>
The	O
network	B-Architecture
version	O
worked	O
in	O
a	O
similar	O
way	O
.	O
</s>
<s>
In	O
the	O
early	O
years	O
,	O
DOS	B-Device
versions	O
up	O
to	O
version	O
5	O
sold	O
for	O
a	O
price	O
of	O
around	O
US$1	O
,	O
000	O
,	O
but	O
the	O
executable	O
TSR	O
database	B-General_Concept
engine	I-General_Concept
file	O
could	O
be	O
distributed	O
with	O
applications	O
without	O
charge	O
.	O
</s>
<s>
They	O
released	O
a	O
number	O
of	O
versions	O
over	O
the	O
next	O
few	O
years	O
:	O
in	O
February	O
1983	O
they	O
released	O
the	O
Btrieve	B-Application
2.x	O
series	O
,	O
and	O
when	O
MS-DOS	O
2.0	O
developed	O
support	O
for	O
file	O
and	O
directory	O
handles	O
,	O
they	O
released	O
Btrieve	B-Application
3.0	O
.	O
</s>
<s>
When	O
MS-DOS	O
3.1	O
standardised	O
its	O
internal	O
interfaces	B-Application
in	O
March	O
1985	O
,	O
they	O
released	O
Btrieve	B-Application
3.1	O
C/S	O
one	O
month	O
later	O
,	O
which	O
had	O
network	B-Architecture
and	O
client/server	B-Operating_System
support	O
.	O
</s>
<s>
In	O
February	O
1986	O
,	O
Btrieve	B-Application
4.0	O
was	O
released	O
,	O
and	O
when	O
the	O
4.1	O
upgrade	O
was	O
released	O
it	O
gained	O
support	O
for	O
extended	O
key	O
types	O
and	O
supplemental	O
indexes	O
.	O
</s>
<s>
Although	O
Btrieve	B-Application
was	O
fairly	O
popular	O
,	O
it	O
was	O
an	O
API	B-Application
database	B-General_Concept
engine	I-General_Concept
.	O
</s>
<s>
The	O
killer-app	O
database	B-Application
manager	I-Application
on	O
the	O
PC	O
,	O
dBase	B-Application
II	I-Application
and	O
its	O
successors	O
,	O
were	O
database	B-Application
management	I-Application
systems	I-Application
(	O
DBMS	O
)	O
which	O
could	O
be	O
used	O
either	O
as	O
a	O
free-standing	O
,	O
general-purpose	O
application	O
,	O
or	O
a	O
database	B-Application
programming	I-Application
language	O
.	O
</s>
<s>
Btrieve	B-Application
was	O
also	O
more	O
expensive	O
to	O
buy	O
than	O
dBase	B-Application
,	O
although	O
run-time	O
licensing	O
was	O
free	O
of	O
charge	O
.	O
</s>
<s>
Btrieve	B-Application
grew	O
to	O
a	O
developer	O
base	O
of	O
over	O
5,000	O
users	O
and	O
was	O
widely	O
used	O
in	O
the	O
financial	O
area	O
.	O
</s>
<s>
The	O
company	O
took	O
some	O
time	O
to	O
create	O
a	O
user	B-Application
interface	I-Application
for	O
the	O
product	O
,	O
however	O
in	O
1984	O
they	O
released	O
Xtrieve	B-Application
,	O
a	O
menu-driven	O
program	O
that	O
used	O
a	O
new	O
.DDF	O
data	B-Application
dictionary	I-Application
to	O
enforce	O
relational	B-Application
database	I-Application
rules	O
.	O
</s>
<s>
In	O
1987	O
,	O
Novell	O
started	O
diversifying	O
and	O
buying	O
companies	O
to	O
add	O
to	O
their	O
NetWare	B-Operating_System
operating	B-General_Concept
system	I-General_Concept
.	O
</s>
<s>
Early	O
the	O
next	O
year	O
,	O
Btrieve	B-Application
5.0	O
was	O
released	O
to	O
run	O
as	O
a	O
native	O
NetWare	B-Operating_System
application	O
,	O
or	O
Value	O
Added	O
Process	O
.	O
</s>
<s>
According	O
to	O
Jim	O
Kyle	O
,	O
"	O
it	O
had	O
auto-increment	O
key	O
types	O
,	O
the	O
BROUTER	O
network	B-Architecture
process	O
server	B-Application
,	O
data-only	O
and	O
key-only	O
files	O
,	O
and	O
optional	O
data	O
compression	O
"	O
.	O
</s>
<s>
Version	O
5.1	O
was	O
released	O
in	O
1990	O
with	O
increased	O
file-handling	O
transaction	O
capability	O
,	O
logging	O
and	O
roll-forward	O
operations	O
,	O
along	O
with	O
several	O
API	B-Application
enhancements	O
.	O
</s>
<s>
Several	O
versions	O
were	O
created	O
for	O
DOS	B-Device
,	O
OS/2	B-Application
and	O
Microsoft	B-Application
Windows	I-Application
.	O
</s>
<s>
However	O
,	O
it	O
was	O
not	O
promoted	O
extensively	O
by	O
Novell	O
,	O
and	O
due	O
to	O
enhancements	O
,	O
(	O
such	O
as	O
the	O
change	O
from	O
pre-imaging	O
to	O
shadow-paging	O
)	O
it	O
was	O
incompatible	O
with	O
previous	O
versions	O
of	O
Btrieve	B-Application
.	O
</s>
<s>
The	O
market	O
did	O
not	O
increase	O
much	O
for	O
Btrieve	B-Application
and	O
it	O
did	O
not	O
see	O
wide	O
adoption	O
due	O
to	O
these	O
issues	O
.	O
</s>
<s>
When	O
the	O
company	O
was	O
acquired	O
by	O
Novell	O
,	O
SoftCraft	O
had	O
been	O
working	O
on	O
a	O
product	O
called	O
XQL	O
,	O
an	O
SQL	B-Language
interpreter	O
designed	O
to	O
better	O
deal	O
with	O
industry	O
standard	O
SQL	B-Language
,	O
which	O
the	O
Xtrieve	B-Application
package	O
was	O
not	O
fully	O
compliant	O
with	O
.	O
</s>
<s>
This	O
became	O
the	O
basis	O
for	O
NetWare	B-Operating_System
SQL	B-Language
,	O
which	O
was	O
initially	O
released	O
in	O
1989	O
,	O
and	O
was	O
a	O
bare-bones	O
SQL	B-Language
interpreter	O
which	O
implemented	O
the	O
base	O
IBM	O
version	O
of	O
SQL	B-Language
.	O
</s>
<s>
By	O
1994	O
,	O
Novell	O
had	O
largely	O
given	O
up	O
on	O
attempting	O
to	O
make	O
NetWare	B-Operating_System
into	O
a	O
complete	O
alternative	O
operating	B-General_Concept
system	I-General_Concept
,	O
and	O
started	O
selling	O
off	O
many	O
of	O
the	O
companies	O
it	O
had	O
acquired	O
only	O
a	O
few	O
years	O
earlier	O
.	O
</s>
<s>
They	O
had	O
minimally	O
promoted	O
Btrieve	B-Application
,	O
largely	O
due	O
to	O
the	O
delay	O
(	O
24	O
months	O
)	O
in	O
releasing	O
version	O
6	O
.	O
</s>
<s>
Negotiations	O
between	O
The	O
Woodwards	O
and	O
Novell	O
were	O
entered	O
into	O
,	O
and	O
after	O
two	O
years	O
Novell	O
announced	O
on	O
26	O
Jan	O
,	O
1994	O
that	O
it	O
was	O
going	O
to	O
transfer	O
ownership	O
of	O
Btrieve	B-Application
to	O
Btrieve	B-Application
Technologies	O
,	O
Incorporated	O
(	O
also	O
known	O
as	O
BTI	O
)	O
.	O
</s>
<s>
The	O
CEO	B-Application
position	O
was	O
given	O
to	O
Ron	O
Harris	O
,	O
a	O
former	O
employee	O
of	O
Texas	O
Instruments	O
,	O
and	O
one	O
of	O
the	O
founding	O
employees	O
of	O
Citrix	B-Application
Systems	I-Application
,	I-Application
Inc	I-Application
.	I-Application
where	O
he	O
was	O
employed	O
first	O
as	O
Director	O
of	O
Strategic	O
Planning	O
,	O
then	O
as	O
Vice-President	O
of	O
Marketing	O
,	O
and	O
finally	O
as	O
the	O
Product	O
Group	O
Vice	O
President	O
.	O
</s>
<s>
Btrieve	B-Application
was	O
totally	O
rewritten	O
,	O
and	O
on	O
1	O
July	O
1994	O
Btrieve	B-Application
6.15	O
for	O
DOS	B-Device
,	O
Windows	O
and	O
OS/2	B-Application
was	O
released	O
.	O
</s>
<s>
Novell	O
SQL	B-Language
was	O
renamed	O
to	O
Scalable	O
SQL	B-Language
reflecting	O
the	O
change	O
in	O
ownership	O
of	O
the	O
company	O
.	O
</s>
<s>
In	O
1995	O
,	O
version	O
6.15	O
was	O
released	O
for	O
Novell	B-Operating_System
NetWare	I-Operating_System
,	O
Windows	B-Device
NT	I-Device
Server	I-Device
and	O
for	O
Windows	O
NT/95	O
,	O
and	O
thus	O
became	O
a	O
cross-platform	B-Operating_System
database	O
product	O
.	O
</s>
<s>
The	O
concept	O
of	O
a	O
Micro	O
Kernel	O
Database	B-General_Concept
Engine	I-General_Concept
(	O
MKDE	O
)	O
was	O
introduced	O
in	O
this	O
version	O
.	O
</s>
<s>
In	O
1996	O
,	O
the	O
company	O
renamed	O
itself	O
to	O
Pervasive	O
Software	O
,	O
and	O
their	O
product	O
to	O
Pervasive.SQL	O
.	O
</s>
<s>
They	O
did	O
this	O
in	O
order	O
to	O
allow	O
greater	O
penetration	O
of	O
the	O
relational	B-Application
database	I-Application
market	O
and	O
to	O
re-align	O
as	O
an	O
SQL	B-Language
vendor	O
,	O
though	O
they	O
are	O
still	O
marketing	O
and	O
developing	O
Btrieve	B-Application
.	O
</s>
<s>
In	O
1997	O
,	O
Pervasive	O
released	O
ScalableSQL	O
4.0	O
,	O
a	O
relational	B-Application
database	I-Application
product	O
,	O
and	O
Btrieve	B-Application
7.0	O
.	O
</s>
<s>
In	O
2000	O
,	O
Novell	O
was	O
criticized	O
after	O
it	O
ceased	O
bundling	O
Pervasive.SQL	O
with	O
NetWare	B-Operating_System
from	O
version	O
5.1	O
onwards	O
;	O
instead	O
,	O
it	O
shipped	O
with	O
a	O
trial	O
version	O
that	O
shut	O
down	O
after	O
90	O
days	O
.	O
</s>
<s>
The	O
latest	O
version	O
,	O
Pervasive	B-Application
PSQL	I-Application
Summit	O
v11	O
,	O
was	O
released	O
in	O
September	O
2010	O
.	O
</s>
<s>
In	O
February	O
2016	O
Actian	O
released	O
Btrieve	B-Application
12	O
.	O
</s>
<s>
There	O
was	O
one	O
DOS	B-Device
client-based	O
configuration	O
of	O
Btrieve	B-Application
created	O
by	O
SoftCraft	O
.	O
</s>
<s>
SoftCraft	O
's	O
definition	O
of	O
a	O
client-based	O
version	O
was	O
a	O
"	O
Btrieve	B-Application
engine	O
running	O
on	O
a	O
particular	O
workstation.	O
"	O
</s>
<s>
This	O
meant	O
the	O
record-management	O
engine	O
connected	O
directly	O
to	O
the	O
files	O
via	O
operating	B-General_Concept
system	I-General_Concept
functions	O
and	O
modified	O
the	O
records	O
accordingly	O
,	O
whether	O
the	O
files	O
were	O
local	O
or	O
on	O
a	O
network	B-Architecture
.	O
</s>
<s>
The	O
client-based	O
engine	O
allowed	O
five	O
concurrent	B-Operating_System
users	O
to	O
access	O
the	O
database	O
at	O
any	O
one	O
time	O
.	O
</s>
<s>
All	O
record	O
processing	O
was	O
done	O
on	O
the	O
workstation	B-Device
the	O
engine	O
was	O
installed	O
on	O
.	O
</s>
<s>
In	O
later	O
versions	O
,	O
Btrieve	B-Application
for	O
DOS	B-Device
could	O
use	O
either	O
of	O
two	O
modes	O
:	O
what	O
they	O
called	O
SEFS	O
(	O
Single-Engine	O
File	O
Sharing	O
)	O
or	O
MEFS	O
(	O
Multi-Engine	O
File	O
Sharing	O
)	O
.	O
</s>
<s>
Btrieve	B-Application
for	O
Netware	B-Operating_System
was	O
essentially	O
the	O
same	O
as	O
Btrieve	B-Application
for	O
DOS	B-Device
with	O
some	O
extra	O
features	O
available	O
only	O
on	O
Netware	B-Operating_System
at	O
the	O
time	O
.	O
</s>
<s>
It	O
ran	O
a	O
server	B-Application
process	O
,	O
called	O
BSERVER	O
,	O
on	O
the	O
file-sharing	O
server	B-Application
and	O
this	O
managed	O
data	O
input/output	B-General_Concept
in	O
conjunction	O
with	O
the	O
network	B-Architecture
file	B-Application
system	I-Application
.	O
</s>
<s>
The	O
server	B-Application
process	O
was	O
first	O
implemented	O
as	O
a	O
Netware	B-Operating_System
Value-Added	O
Process	O
(	O
VAP	O
)	O
called	O
BSERVER.VAP	O
,	O
but	O
was	O
switched	O
to	O
a	O
Netware	B-Operating_System
NetWare	B-Application
Loadable	I-Application
Module	I-Application
(	O
NLM	B-Application
)	O
soon	O
after	O
.	O
</s>
<s>
BSERVER	O
was	O
the	O
database	B-General_Concept
engine	I-General_Concept
that	O
dealt	O
with	O
access	O
to	O
records	O
,	O
however	O
it	O
also	O
accepted	O
requests	O
for	O
the	O
transmission	O
of	O
requested	O
data	O
to	O
another	O
server	B-Application
via	O
the	O
BROUTER	O
process	O
.	O
</s>
<s>
Btrieve	B-Application
used	O
requesters	O
to	O
make	O
database	O
input/output	B-General_Concept
requests	O
from	O
the	O
client	O
workstation	B-Device
.	O
</s>
<s>
The	O
requesters	O
were	O
available	O
for	O
DOS	B-Device
,	O
OS/2	B-Application
,	O
Microsoft	B-Application
Windows	I-Application
,	O
and	O
UnixWare	B-Operating_System
.	O
</s>
<s>
The	O
program	O
BREQUEST.EXE	O
accepted	O
input/output	B-General_Concept
requests	O
via	O
the	O
Btrieve	B-Application
API	B-Application
and	O
relayed	O
them	O
to	O
BSERVER	O
.	O
</s>
<s>
The	O
BROUTER	O
process	O
allowed	O
for	O
incoming	O
requests	O
to	O
be	O
"	O
routed	O
"	O
to	O
a	O
copy	O
of	O
the	O
database	O
on	O
another	O
server	B-Application
.	O
</s>
<s>
It	O
was	O
loaded	O
on	O
the	O
Netware	B-Operating_System
server	B-Application
and	O
dealt	O
with	O
communication	O
between	O
multiple	O
server	B-Application
processes	O
running	O
on	O
the	O
file-server	O
through	O
the	O
use	O
of	O
two	O
File	O
Server	B-Application
Tables	O
.	O
</s>
<s>
According	O
to	O
Pervasive	O
,	O
these	O
provide	O
a	O
list	O
of	O
"	O
server	B-Application
names	O
and	O
addresses	O
,	O
and	O
the	O
Server	B-Application
Routing	O
Table	O
"	O
.	O
</s>
<s>
BROUTER	O
also	O
enabled	O
communication	O
requests	O
to	O
be	O
routed	O
to	O
the	O
correct	O
server	B-Application
via	O
SPX	O
by	O
looking	O
up	O
the	O
BSPXCOM	O
NetWare	B-Application
Loadable	I-Application
Module	I-Application
and	O
coordinated	O
locks	O
and	O
other	O
mechanisms	O
that	O
controlled	O
access	O
to	O
the	O
data	O
in	O
the	O
Btrieve	B-Application
database	O
.	O
</s>
<s>
Btrieve	B-Application
for	O
DOS	B-Device
used	O
the	O
SEFS	O
and	O
MEFS	O
modes	O
for	O
file	O
sharing	O
,	O
and	O
because	O
it	O
was	O
able	O
to	O
run	O
on	O
a	O
network	B-Architecture
it	O
was	O
able	O
to	O
use	O
exclusive	O
and	O
concurrent	B-Operating_System
transactions	O
.	O
</s>
<s>
Btrieve	B-Application
for	O
Windows	O
was	O
created	O
before	O
the	O
company	O
rewrote	O
the	O
codebase	O
to	O
use	O
the	O
MKDE	O
.	O
</s>
<s>
It	O
featured	O
SEFS	O
and	O
MEFS	O
file	O
sharing	O
mechanisms	O
;	O
used	O
shadow-paging	O
and	O
allowed	O
for	O
exclusive	O
and	O
concurrent	B-Operating_System
locks	O
.	O
</s>
<s>
Version	O
6.1	O
files	O
allowed	O
for	O
concurrent	B-Operating_System
and	O
system	O
transactions	O
,	O
the	O
optional	O
renumbering	O
of	O
keys	O
,	O
case	O
insensitive	O
ACS	O
tables	O
,	O
and	O
enhanced	O
locking	O
operations	O
.	O
</s>
<s>
Btrieve	B-Application
for	O
Windows	O
could	O
run	O
as	O
a	O
client	O
to	O
the	O
database	O
that	O
utilized	O
SEFS	O
or	O
MEFS	O
modes	O
,	O
or	O
it	O
could	O
directly	O
access	O
the	O
Btrieve	B-Application
server	B-Application
.	O
</s>
<s>
The	O
client-based	O
version	O
of	O
Btrieve	B-Application
has	O
all	O
the	O
database	O
files	O
either	O
directly	O
on	O
the	O
local	O
computer	O
or	O
via	O
a	O
mapped	O
network	B-Architecture
drive	O
(	O
set	O
up	O
via	O
the	O
DOS	B-Device
NET	O
USE	O
command	O
)	O
.	O
</s>
<s>
The	O
loader	O
and	O
requester	O
module	O
verify	O
the	O
BTI.INI	O
configuration	O
file	O
is	O
correctly	O
set	O
up	O
to	O
load	O
the	O
client-based	O
Btrieve	B-Application
engine	O
.	O
</s>
<s>
In	O
turn	O
,	O
this	O
loads	O
the	O
local	O
interface	O
to	O
the	O
btrieve	B-Application
engine	O
(	O
WBTRLOCL.DLL	O
)	O
.	O
</s>
<s>
If	O
necessary	O
,	O
this	O
local	O
interface	O
loads	O
the	O
Btrieve	B-Application
engine	O
(	O
WBTR32.EXE	O
)	O
into	O
memory	O
and	O
sends	O
the	O
necessary	O
database	O
requests	O
to	O
it	O
.	O
</s>
<s>
The	O
database	B-General_Concept
engine	I-General_Concept
then	O
calls	O
various	O
Win32	O
system	O
libraries	O
to	O
perform	O
file	O
operations	O
on	O
the	O
database	O
files	O
.	O
</s>
<s>
The	O
client-based	O
version	O
of	O
Btrieve	B-Application
for	O
Windows	O
could	O
access	O
server-based	O
versions	O
of	O
Btrieve	B-Application
via	O
a	O
DOS-based	O
"	O
requester	O
"	O
.	O
</s>
<s>
The	O
requestor	O
required	O
the	O
use	O
of	O
DOS	B-Device
Protected	B-Application
Mode	I-Application
Interface	O
(	O
DPMI	O
)	O
which	O
allowed	O
program	O
access	O
to	O
DOS	B-Device
extended	B-Device
memory	I-Device
accessible	O
only	O
via	O
the	O
CPU	O
's	O
Protected	B-Application
Mode	I-Application
.	O
</s>
<s>
As	O
with	O
the	O
client-based	O
interface	O
,	O
the	O
Btrieve-based	O
application	O
makes	O
a	O
call	O
to	O
the	O
WBTRCALL.DLL	O
loader	O
and	O
requester	O
interface	O
library	O
.	O
</s>
<s>
This	O
library	O
checks	O
the	O
BTI.INI	O
file	O
to	O
see	O
if	O
it	O
needs	O
to	O
access	O
data	O
on	O
the	O
local	O
system	O
or	O
whether	O
it	O
needs	O
to	O
access	O
data	O
on	O
a	O
remote	O
server	B-Application
.	O
</s>
<s>
If	O
it	O
needs	O
to	O
access	O
the	O
server	B-Application
,	O
then	O
it	O
uses	O
the	O
Windows	O
version	O
of	O
DPMI	O
to	O
access	O
a	O
DOS-based	O
requester	O
named	O
BREQUEST.EXE	O
.	O
</s>
<s>
The	O
requester	O
then	O
establishes	O
a	O
network	B-Architecture
connection	O
to	O
the	O
server	B-Application
,	O
which	O
processes	O
the	O
request	O
and	O
passes	O
back	O
a	O
message	O
to	O
the	O
requester	O
when	O
the	O
database	O
request	O
is	O
completed	O
.	O
</s>
<s>
Btrieve	B-Application
for	O
Windows	B-Device
NT	I-Device
and	O
Windows	B-Application
95	I-Application
was	O
released	O
in	O
1995	O
,	O
along	O
with	O
Btrieve	B-Application
for	O
Netware	B-Operating_System
and	O
Btrieve	B-Application
for	O
Windows	B-Device
NT	I-Device
Server	I-Device
.	O
</s>
<s>
The	O
file	O
sharing	O
mechanisms	O
remained	O
the	O
same	O
,	O
as	O
it	O
still	O
used	O
SEFS	O
and	O
MEFS	O
file	O
sharing	O
modes	O
,	O
shadow-paging	O
and	O
allowed	O
for	O
exclusive	O
and	O
concurrent	B-Operating_System
locks	O
.	O
</s>
<s>
This	O
version	O
of	O
Btrieve	B-Application
allowed	O
for	O
null	O
values	O
in	O
keys	O
,	O
which	O
meant	O
that	O
a	O
record	O
could	O
be	O
entered	O
into	O
the	O
database	O
when	O
information	O
on	O
the	O
key	O
was	O
not	O
available	O
.	O
</s>
<s>
Variable-tail	O
allocation	O
tables	O
were	O
introduced	O
in	O
version	O
6.15	O
,	O
so	O
they	O
were	O
included	O
in	O
the	O
Windows	O
NT/95	O
build	O
of	O
Btrieve	B-Application
.	O
</s>
<s>
There	O
are	O
two	O
configurations	O
of	O
Btrieve	B-Application
for	O
Windows	O
NT/95	O
,	O
standalone	O
workstation	B-Device
and	O
client/server	B-Operating_System
.	O
</s>
<s>
When	O
using	O
the	O
standalone	O
workstation	B-Device
configuration	O
of	O
Btrieve	B-Application
,	O
all	O
processing	O
of	O
records	O
is	O
done	O
on	O
the	O
local	O
workstation	B-Device
.	O
</s>
<s>
The	O
workstation	B-Device
relies	O
on	O
the	O
underlying	O
mechanisms	O
of	O
Windows	O
to	O
allow	O
the	O
MKDE	O
(	O
program	O
W32MKDE.EXE	O
)	O
to	O
gain	O
direct	O
access	O
to	O
the	O
database	O
files	O
,	O
and	O
uses	O
lock	O
files	O
to	O
deal	O
with	O
concurrency	B-Operating_System
issues	O
.	O
</s>
<s>
In	O
this	O
configuration	O
,	O
the	O
application	O
makes	O
calls	O
to	O
the	O
Btrieve	B-Application
API	B-Application
,	O
or	O
Microkernel	O
Interface	O
(	O
WBTRV32.DLL	O
)	O
.	O
</s>
<s>
The	O
call	O
is	O
then	O
processed	O
by	O
the	O
interface	O
and	O
passed	O
to	O
the	O
MKDE	O
(	O
W32MKDE.EXE	O
)	O
which	O
uses	O
the	O
underlying	O
operating	B-General_Concept
system	I-General_Concept
file	B-Application
system	I-Application
(	O
whether	O
it	O
be	O
network	B-Architecture
or	O
local	O
)	O
to	O
directly	O
access	O
the	O
database	O
files	O
.	O
</s>
<s>
If	O
Btrieve	B-Application
uses	O
Windows	B-General_Concept
file	I-General_Concept
sharing	I-General_Concept
and	O
has	O
the	O
database	B-General_Concept
engine	I-General_Concept
open	O
files	O
directly	O
on	O
a	O
file	O
share	O
,	O
for	O
instance	O
,	O
and	O
there	O
is	O
network	B-Architecture
instability	O
(	O
e.g.	O
</s>
<s>
a	O
network	B-Architecture
cable	O
is	O
disconnected	O
)	O
during	O
an	O
update	O
the	O
fields	O
used	O
to	O
link	O
one	O
Btrieve	B-Application
file	O
to	O
another	O
can	O
become	O
unsynchronized	O
(	O
to	O
all	O
intents	O
and	O
purposes	O
the	O
data	O
loses	O
its	O
relationships	O
or	O
links	O
to	O
other	O
data	O
)	O
and	O
the	O
database	O
file	O
itself	O
can	O
get	O
corrupted	O
(	O
though	O
the	O
chance	O
of	O
this	O
is	O
reduced	O
due	O
to	O
pre-image	O
paging	O
)	O
.	O
</s>
<s>
When	O
using	O
the	O
client/server	B-Operating_System
(	O
or	O
Server	B-Application
edition	O
)	O
configuration	O
of	O
Btrieve	B-Application
,	O
processing	O
of	O
records	O
is	O
generally	O
done	O
on	O
a	O
Windows	O
file	O
server	B-Application
via	O
a	O
mapped	O
drive	O
(	O
a	O
way	O
of	O
mapping	O
a	O
file	O
share	O
to	O
a	O
"	O
virtual	O
"	O
disk	O
drive	O
in	O
Windows	O
via	O
the	O
NET	O
USE	O
command	O
)	O
.	O
</s>
<s>
On	O
Windows	B-Application
95	I-Application
,	O
the	O
MKDE	O
interface	O
(	O
a	O
Windows	O
dynamic	O
link	O
library	O
(	O
DLL	O
)	O
called	O
WBTRV32.DLL	O
)	O
determines	O
what	O
database	O
access	O
method	O
is	O
in	O
use	O
via	O
the	O
configuration	O
file	O
.	O
</s>
<s>
If	O
it	O
detects	O
both	O
the	O
client/server	B-Operating_System
and	O
workstation	B-Device
engines	O
are	O
installed	O
on	O
the	O
same	O
machine	O
,	O
it	O
checks	O
whether	O
the	O
target	O
is	O
set	O
to	O
workstation	B-Device
or	O
server	B-Application
.	O
</s>
<s>
If	O
running	O
on	O
Windows	B-Device
NT	I-Device
and	O
the	O
server	B-Application
process	O
NTMKDE.EXE	O
is	O
running	O
along	O
with	O
the	O
standalone	O
workstation	B-Device
process	O
W32MKDE.EXE	O
it	O
looks	O
in	O
the	O
registry	O
to	O
determine	O
if	O
the	O
target	O
is	O
a	O
server	B-Application
or	O
workstation	B-Device
.	O
</s>
<s>
In	O
both	O
cases	O
,	O
if	O
the	O
MKDE	O
interface	O
is	O
set	O
to	O
workstation	B-Device
,	O
(	O
the	O
"	O
Standalone	O
workstation	B-Device
"	O
configuration	O
)	O
it	O
uses	O
the	O
MKDE	O
(	O
W32MKDE.EXE	O
)	O
to	O
access	O
the	O
file	O
directly	O
.	O
</s>
<s>
If	O
it	O
is	O
set	O
to	O
server	B-Application
,	O
the	O
MKDE	O
interface	O
on	O
the	O
client	O
uses	O
a	O
communications	O
module	O
(	O
on	O
Windows	B-Application
95	I-Application
this	O
is	O
W32BTICM.DLL	O
,	O
on	O
Windows	B-Device
NT	I-Device
this	O
is	O
NTBTICM.DLL	O
)	O
that	O
"	O
talks	O
"	O
to	O
the	O
server	B-Application
.	O
</s>
<s>
The	O
server	B-Application
itself	O
has	O
its	O
own	O
matching	O
communications	O
module	O
(	O
again	O
either	O
W32BTICM.DLL	O
or	O
NTBTICM.DLL	O
)	O
that	O
resides	O
on	O
the	O
mapped	O
drive	O
.	O
</s>
<s>
The	O
server	B-Application
DLL	O
communicates	O
with	O
the	O
server	B-Application
MKDE	O
(	O
NTMKDE.EXE	O
)	O
which	O
updates	O
records	O
,	O
then	O
sends	O
a	O
confirmation	O
that	O
the	O
operation	O
succeeded	O
,	O
back	O
through	O
the	O
communications	O
module	O
to	O
the	O
client	O
.	O
</s>
<s>
The	O
advantage	O
of	O
this	O
system	O
is	O
,	O
if	O
a	O
network	B-Architecture
connection	O
failure	O
occurs	O
,	O
the	O
MKDE	O
on	O
the	O
server	B-Application
will	O
be	O
able	O
to	O
detect	O
it	O
and	O
recover	O
in	O
a	O
more	O
graceful	O
manner	O
than	O
the	O
workstation	B-Device
configuration	O
is	O
able	O
to	O
.	O
</s>
<s>
A	O
configuration	O
utility	O
was	O
included	O
with	O
Btrieve	B-Application
to	O
alter	O
MKDE	O
settings	O
.	O
</s>
<s>
Trace	O
operations	O
:	O
this	O
category	O
contains	O
settings	O
related	O
to	O
tracing	O
various	O
Btrieve	B-Application
operations	O
.	O
</s>
<s>
Pervasive.SQL	O
7	O
was	O
released	O
in	O
March	O
,	O
1998	O
,	O
and	O
included	O
Scalable	O
SQL	B-Language
4	O
and	O
Btrieve	B-Application
7.0	O
.	O
</s>
<s>
Btrieve	B-Application
7.0	O
ran	O
on	O
the	O
same	O
platforms	O
as	O
Btrieve	B-Application
6.x	O
:	O
Windows	B-Application
95	I-Application
,	O
Windows	B-Device
NT	I-Device
3.51	O
&	O
4	O
,	O
Netware	B-Operating_System
and	O
DOS	B-Device
.	O
</s>
<s>
The	O
old	O
log	O
file	O
format	O
of	O
Btrieve	B-Application
6.x	O
was	O
also	O
replaced	O
with	O
a	O
new	O
centralised	O
log	O
called	O
PVSW.LOG	O
and	O
that	O
had	O
a	O
unified	O
and	O
enhanced	O
log	O
file	O
format	O
.	O
</s>
<s>
The	O
MKDE	O
was	O
retained	O
in	O
Pervasive.SQL	O
7	O
.	O
</s>
<s>
The	O
application	O
using	O
Btrieve	B-Application
calls	O
a	O
services	O
manager	O
which	O
then	O
searches	O
through	O
various	O
configured	O
directories	O
for	O
specific	O
encoded	O
filename	O
.	O
</s>
<s>
The	O
file	O
name	O
loaded	O
for	O
Btrieve	B-Application
files	O
in	O
Backus	O
–	O
Naur	O
form	O
is	O
:	O
</s>
<s>
+	O
Embedded	O
filename	O
platform	O
codes	O
Code	O
Platform	O
W1	O
Windows	B-Application
3.1x	I-Application
,	O
incl	O
.	O
</s>
<s>
The	O
MKDE	O
then	O
determines	O
whether	O
it	O
is	O
configured	O
to	O
be	O
a	O
workstation-based	O
configuration	O
or	O
a	O
server-based	O
configuration	O
.	O
</s>
<s>
It	O
then	O
passes	O
requests	O
via	O
its	O
communications	O
"	O
requester	O
"	O
module	O
onto	O
the	O
database	O
server	B-Application
,	O
or	O
directly	O
modifies	O
the	O
database	O
files	O
if	O
configured	O
in	O
workstation	B-Device
mode	O
.	O
</s>
<s>
Pervasive.SQL	O
2000	O
and	O
Pervasive.SQL	O
2000i	O
use	O
essentially	O
the	O
same	O
architecture	O
as	O
Pervasive.SQL	O
7	O
,	O
though	O
2000i	O
includes	O
i*Net	O
server	O
.	O
</s>
<s>
It	O
uses	O
the	O
same	O
component	O
model	O
,	O
has	O
the	O
ability	O
to	O
use	O
the	O
Btrieve	B-Application
or	O
Scalable	O
SQL	B-Language
engines	O
and	O
continues	O
using	O
an	O
MKDE	O
.	O
</s>
<s>
This	O
version	O
included	O
support	O
for	O
Red	O
Hat	O
Linux	B-Application
,	O
Caldera	B-Operating_System
OpenLinux	I-Operating_System
,	O
SUSE	O
and	O
Solaris	B-Application
.	O
</s>
<s>
It	O
also	O
had	O
better	O
integration	O
with	O
Terminal	B-Protocol
Services	I-Protocol
,	O
though	O
only	O
one	O
instance	O
of	O
the	O
database	B-General_Concept
engine	I-General_Concept
may	O
run	O
on	O
any	O
terminal	O
server	B-Application
platform	O
.	O
</s>
<s>
You	O
cannot	O
run	O
separate	O
copies	O
of	O
the	O
database	B-General_Concept
engine	I-General_Concept
within	O
two	O
or	O
more	O
terminal	O
sessions	O
.	O
</s>
<s>
Introduced	O
in	O
December	O
2002	O
,	O
Pervasive.SQL	O
V8	O
improves	O
the	O
performance	O
of	O
both	O
Btrieve	B-Application
and	O
SQL	B-Language
applications	O
using	O
a	O
number	O
of	O
new	O
technologies	O
.	O
</s>
<s>
The	O
V8	O
Security	O
Feature	O
Pack	O
(	O
a	O
mid-release	O
product	O
update	O
designated	O
8.5	O
)	O
added	O
important	O
new	O
security	O
features	O
designed	O
to	O
lock	O
down	O
Pervasive.SQL	O
data	O
files	O
.	O
</s>
<s>
Prior	O
to	O
8.5	O
,	O
access	O
to	O
Btrieve	B-Application
data	O
was	O
controlled	O
by	O
the	O
operating	B-General_Concept
system	I-General_Concept
's	O
security	O
mechanism	O
.	O
</s>
<s>
8.5	O
introduced	O
new	O
security	O
models	O
,	O
which	O
allow	O
administrators	O
to	O
control	O
access	O
to	O
the	O
Btrieve	B-Application
data	O
using	O
database	O
security	O
.	O
</s>
<s>
In	O
addition	O
,	O
client/server	B-Operating_System
configurations	O
no	O
longer	O
require	O
the	O
use	O
of	O
network	B-General_Concept
shares	I-General_Concept
or	O
mapped	O
drives	O
.	O
</s>
<s>
Applications	O
can	O
reference	O
secure	O
Btrieve	B-Application
data	O
using	O
a	O
URI	O
connection	O
string	O
.	O
</s>
<s>
Pervasive	B-Application
PSQL	I-Application
v9	O
includes	O
new	O
Java	O
GUIs	O
,	O
built	O
on	O
the	O
Eclipse	O
framework	O
.	O
</s>
<s>
These	O
GUIs	O
are	O
available	O
for	O
both	O
Microsoft	B-Application
Windows	I-Application
and	O
Linux	B-Application
.	O
</s>
<s>
In	O
addition	O
,	O
v9	O
included	O
many	O
SQL	B-Language
performance	O
and	O
syntax	O
updates	O
,	O
improving	O
both	O
the	O
speed	O
and	O
flexibility	O
of	O
all	O
of	O
the	O
SQL	B-Language
interfaces	B-Application
-	O
ADO.Net	O
,	O
JDBC	O
,	O
ODBC	O
,	O
and	O
OLE	O
DB	O
.	O
</s>
<s>
Finally	O
,	O
PSQL	O
v9	O
expanded	O
the	O
Btrieve	B-Application
maximum	O
file	O
size	O
from	O
64GB	O
in	O
8.x	O
and	O
earlier	O
file	O
formats	O
to	O
128	O
GB	O
in	O
9.0	O
format	O
files	O
,	O
and	O
again	O
to	O
256GB	O
for	O
files	O
in	O
the	O
9.5	O
file	O
format	O
.	O
</s>
<s>
DDF	O
Builder	O
provides	O
a	O
mechanism	O
for	O
Btrieve	B-Application
users	O
to	O
define	O
the	O
meta	O
data	O
for	O
existing	O
Btrieve	B-Application
files	O
,	O
thus	O
allowing	O
Btrieve	B-Application
data	O
to	O
be	O
accessible	O
via	O
SQL	B-Language
tools	O
and	O
utilities	O
.	O
</s>
<s>
All	O
versions	O
of	O
the	O
MKDE	O
retain	O
full	O
backward	O
read-level	O
compatibility	O
with	O
earlier	O
versions	O
of	O
Btrieve	B-Application
,	O
including	O
those	O
that	O
pre-date	O
introduction	O
of	O
the	O
MKDE	O
itself	O
,	O
and	O
do	O
not	O
change	O
the	O
file	O
's	O
version	O
unless	O
specifically	O
requested	O
to	O
do	O
so	O
.	O
</s>
<s>
Btrieve	B-Application
files	O
that	O
are	O
in	O
the	O
5.x	O
or	O
older	O
file	O
formats	O
MUST	O
be	O
rebuilt	O
(	O
using	O
the	O
GUI	O
or	O
command	O
line	O
Rebuild	O
utilities	O
)	O
to	O
6.x	O
or	O
newer	O
format	O
to	O
support	O
database	O
writes	O
from	O
the	O
9.0	O
or	O
newer	O
database	B-General_Concept
engine	I-General_Concept
.	O
</s>
<s>
Pervasive	B-Application
PSQL	I-Application
v10	O
was	O
released	O
in	O
September	O
2007	O
and	O
was	O
the	O
first	O
version	O
of	O
Pervasive	B-Application
PSQL	I-Application
Server	B-Application
and	O
Client	O
to	O
provide	O
support	O
for	O
64-bit	O
operating	B-General_Concept
systems	I-General_Concept
.	O
</s>
<s>
The	O
Btrieve	B-Application
API	B-Application
and	O
distributing	O
tuning	O
interface	O
(	O
DTI	O
)	O
were	O
both	O
enhanced	O
to	O
support	O
64-bit	O
.	O
</s>
<s>
Pervasive	B-Application
PSQL	I-Application
Workgroup	O
and	O
other	O
components	O
of	O
the	O
SDK	O
were	O
not	O
enhanced	O
for	O
64-bit	O
support	O
.	O
</s>
<s>
The	O
release	O
of	O
Pervasive	B-Application
PSQL	I-Application
v10	O
was	O
timed	O
to	O
offer	O
support	O
for	O
the	O
then	O
newly	O
available	O
Windows	B-Application
Vista	I-Application
and	O
soon	O
to	O
arrive	O
Windows	B-Device
Server	I-Device
2008	I-Device
operating	B-General_Concept
systems	I-General_Concept
.	O
</s>
<s>
Pervasive	B-Application
PSQL	I-Application
v10	O
Server	B-Application
,	O
Workgroup	O
and	O
Client	O
all	O
support	O
Windows	B-Application
Vista	I-Application
.	O
</s>
<s>
Pervasive	B-Application
PSQL	I-Application
v10	O
Server	B-Application
is	O
Certified	O
for	O
Windows	B-Device
Server	I-Device
2008	I-Device
.	O
</s>
<s>
Also	O
included	O
in	O
Pervasive	B-Application
PSQL	I-Application
v10	O
was	O
Xtreme	O
input/output	B-General_Concept
(	O
XIO	O
)	O
,	O
a	O
32-bit	B-Application
Windows	I-Application
database	O
accelerator	O
that	O
enabled	O
access	O
of	O
extended	B-Device
memory	I-Device
to	O
expand	O
the	O
database	O
cached	O
past	O
the	O
normal	O
2GB	O
limit	O
on	O
32-bit	B-Application
Windows	I-Application
systems	O
.	O
</s>
<s>
Xtreme	O
input/output	B-General_Concept
also	O
included	O
update	O
compression	O
algorithms	O
and	O
streamlined	O
writing	O
techniques	O
to	O
improve	O
database	O
input/output	B-General_Concept
performance	O
.	O
</s>
<s>
Digital	O
license	O
enforcement	O
,	O
called	O
Product	O
Authorization	O
,	O
was	O
introduced	O
for	O
the	O
Pervasive	B-Application
PSQL	I-Application
product	O
line	O
with	O
Pervasive	B-Application
PSQL	I-Application
v10	O
.	O
</s>
<s>
Products	O
sold	O
through	O
the	O
Pervasive	O
Distributor	O
and	O
ISV	O
partners	O
were	O
upgrade	O
to	O
include	O
product	O
authorization	O
with	O
the	O
release	O
of	O
Pervasive	B-Application
PSQL	I-Application
v10	O
SP3	O
in	O
November	O
2009	O
.	O
</s>
<s>
Pervasive	B-Application
PSQL	I-Application
v10	O
SP3	O
was	O
also	O
released	O
as	O
a	O
Windows	O
7	O
compatible	O
application	O
.	O
</s>
<s>
Pervasive	B-Application
PSQL	I-Application
v10	O
retained	O
backward	O
compatibility	O
by	O
using	O
the	O
9.5	O
file	O
format	O
with	O
an	O
increase	O
in	O
the	O
maximum	O
data	O
file	O
size	O
to	O
256GB	O
and	O
increase	O
in	O
the	O
maximum	O
page	O
size	O
to	O
16,384	O
bytes	O
.	O
</s>
<s>
Support	O
for	O
NetWare	B-Operating_System
,	O
Windows	B-Device
NT	I-Device
,	O
Windows	O
98	O
,	O
Windows	O
ME	O
,	O
DOS	B-Device
6.22	O
and	O
16-bit	O
applications	O
were	O
dropped	O
with	O
Pervasive	B-Application
PSQL	I-Application
v10	O
.	O
</s>
<s>
Although	O
the	O
Windows	O
and	O
Linux	B-Application
versions	O
of	O
Pervasive	B-Application
PSQL	I-Application
v9	O
products	O
are	O
no	O
longer	O
sold	O
,	O
Pervasive	O
still	O
sells	O
and	O
supports	O
Pervasive	B-Application
PSQL	I-Application
v9	O
for	O
NetWare	B-Operating_System
.	O
</s>
<s>
In	O
2010	O
,	O
Pervasive	O
Software	O
released	O
Pervasive	B-Application
PSQL	I-Application
v11	O
,	O
which	O
allows	O
users	O
to	O
take	O
full	O
advantage	O
of	O
multithreading	O
for	O
faster	O
database	O
processing	O
.	O
</s>
<s>
Pervasive	B-Application
PSQL	I-Application
v11	O
was	O
released	O
in	O
September	O
2010	O
.	O
</s>
<s>
One	O
of	O
the	O
key	O
drivers	O
of	O
the	O
engineering	O
effort	O
behind	O
Pervasive	B-Application
PSQL	I-Application
v11	O
was	O
the	O
redesign	O
of	O
the	O
database	B-General_Concept
engine	I-General_Concept
to	O
increase	O
performance	O
and	O
scalability	O
on	O
multi-core	O
CPU	O
's	O
.	O
</s>
<s>
Pervasive	B-Application
PSQL	I-Application
v11	O
optimizes	O
parallel	O
threads	O
performing	O
similar	O
activities	O
,	O
allowing	O
the	O
database	O
to	O
engage	O
multiple	O
cores	O
during	O
task	O
execution	O
.	O
</s>
<s>
Multi-core	O
support	O
is	O
available	O
with	O
all	O
versions	O
of	O
PSQL	O
v11	O
:	O
32	O
-	O
and	O
64-bit	O
Windows	O
and	O
Linux	B-Application
Servers	O
,	O
and	O
32-bit	O
Workgroup	O
.	O
</s>
<s>
Internal	O
testing	O
at	O
Pervasive	O
documented	O
performance	O
increases	O
of	O
300%	O
when	O
comparing	O
PSQL	O
v10	O
to	O
PSQL	O
v11	O
on	O
an	O
8-core	O
server	B-Application
running	O
Microsoft	O
2008	O
Enterprise	B-Application
Server	I-Application
SP2(64-bit )	O
.	O
</s>
<s>
(	O
IPv6	B-Protocol
)	O
support	O
on	O
Windows	O
is	O
included	O
in	O
Pervasive	B-Application
PSQL	I-Application
v11	O
with	O
continued	O
support	O
for	O
IPv4	O
environments	O
.	O
</s>
<s>
Pervasive	B-Application
PSQL	I-Application
v11	O
supports	O
IPv6	B-Protocol
with	O
both	O
the	O
Btrieve	B-Application
and	O
DTI	O
(	O
Distributed	O
Tuning	O
Interface	O
)	O
access	O
methods	O
.	O
</s>
<s>
64-bit	O
server	B-Application
versions	O
of	O
PSQL	O
v11	O
include	O
a	O
64-bit	O
relational/SQL	O
engine	O
as	O
well	O
as	O
the	O
64-bit	O
navigational/Btrieve	O
engine	O
,	O
along	O
with	O
a	O
64-bit	O
ODBC	O
driver	O
.	O
</s>
<s>
The	O
driver	O
is	O
installed	O
with	O
the	O
64-bit	O
versions	O
of	O
PSQL	O
Server	B-Application
and	O
PSQL	O
Client	O
.	O
</s>
<s>
Pervasive	O
updated	O
the	O
PSQL	O
software	O
development	O
kit	O
with	O
the	O
addition	O
of	O
the	O
Pervasive	B-Application
PSQL	I-Application
ADO.NET	O
Data	O
Provider	O
3.5	O
.	O
</s>
<s>
Pervasive	B-Application
PSQL	I-Application
v11	O
also	O
updated	O
the	O
PDAC	O
(	O
Pervasive	O
Direct	O
Access	O
Components	O
)	O
access	O
method	O
with	O
support	O
for	O
Embardacero	O
's	O
RAD	O
Studio	O
2009	O
and	O
RAD	O
Studio	O
2010	O
.	O
</s>
<s>
Product	O
Authorization	O
was	O
extended	O
in	O
Pervasive	B-Application
PSQL	I-Application
v11	O
to	O
include	O
OEM	O
customers	O
,	O
along	O
with	O
the	O
introduction	O
of	O
a	O
web-based	O
portal	O
for	O
OEM	O
's	O
to	O
generate	O
keys	O
and	O
manage	O
licenses	O
for	O
PSQL	O
v11	O
.	O
</s>
<s>
Telephone	O
authorization	O
(	O
a	O
method	O
of	O
authorizing	O
Pervasive	B-Application
PSQL	I-Application
without	O
requiring	O
an	O
Internet	O
connection	O
)	O
was	O
first	O
introduced	O
with	O
PSQL	O
v11	O
and	O
made	O
available	O
to	O
all	O
Pervasive	O
customers	O
.	O
</s>
<s>
Pervasive	B-Application
PSQL	I-Application
v11	O
continues	O
with	O
the	O
9.5	O
file	O
format	O
,	O
maintaining	O
backward	O
compatibility	O
with	O
previous	O
releases	O
.	O
</s>
<s>
Support	O
for	O
Windows	O
2000	O
was	O
dropped	O
with	O
Pervasive	B-Application
PSQL	I-Application
v11	O
.	O
</s>
<s>
Pervasive	O
AuditMaster	O
provides	O
real-time	O
auditing	O
of	O
all	O
database	O
interactions	O
,	O
whether	O
Btrieve	B-Application
or	O
SQL	B-Language
.	O
</s>
<s>
Pervasive	O
Backup	O
Agent	O
manages	O
PSQL	O
's	O
continuous	O
operations	O
mode	O
and	O
allows	O
backup	O
software	O
to	O
reliably	O
copy	O
online	O
databases	B-Application
.	O
</s>
<s>
In	O
February	O
2016	O
Actian	O
announced	O
Btrieve	B-Application
12	O
.	O
</s>
<s>
Actian	O
say	O
Btrieve	B-Application
12	O
has	O
new	O
features	O
,	O
is	O
compatible	O
with	O
Microsoft	B-Application
Windows	I-Application
Vista	I-Application
to	O
10	B-Operating_System
,	O
and	O
Windows	B-Device
Server	I-Device
2008	I-Device
and	O
2012	B-Device
,	O
and	O
is	O
file	O
format	O
and	O
API	B-Application
compatible	O
with	O
Btrieve	B-Application
6.15	O
,	O
allowing	O
it	O
to	O
read	O
and	O
write	O
Btrieve	B-Application
6.15	O
files	O
from	O
earlier	O
16-bit	O
and	O
DOS	B-Device
applications	O
.	O
</s>
