Open System Services Management and Operations Guide (G06.29+, H06.07+)

Environment Limits
Open System Services Management and Operations Guide—527191-005
E-8
File Size Limit Behavior for File Open Operations
OSS small file
created on older
RVUs and on a
disk with a 512-
byte sector size
Approximately
2GB-24MB if
64-bit OSS API
has never been
used on this file
2GB-8KB
(2,147,475,456
bytes) if prior
open calls have
been closed
and if the file
has previously
been opened by
a 64-bit OSS
API
Approximately
1TB-41MB,
constrained by
disk volume
space
Approximately
2GB-24MB if 64-
bit API has never
been used on this
file
2GB-8KB
(2,147,475,456
bytes) if prior open
calls have been
closed and if the
file has previously
been opened by a
64-bit API
Approximately
1TB-41MB,
constrained by
disk volume
space
Guardian
Enscribe
Format 1 file
created using
OSS APIs on
H06.06 or later
H-series RVUs
or G06.29 or
later G-series
RVUs
Approximately
2GB-2MB,
Enscribe
Format 1
Approximately
2GB-2MB,
Enscribe
Format 1
Approximately
2GB-2MB,
Enscribe Format 1
Approximately
2GB-2MB,
Enscribe
Format 1
Guardian
Enscribe
Format 1 file
created using
Guardian APIs
on H06.06 or
later H-series
RVUs or G06.29
or later G-series
RVUs
Approximately
2GB-1MB,
Enscribe
Format 1,
constrained by
maximum
number of
extents and
extent sizes
Approximately
2GB-1MB,
Enscribe
Format 1,
constrained by
maximum
number of
extents and
extent sizes
See the Guardian
Procedure Calls
Reference Manual.
See the
Guardian
Procedure
Calls
Reference
Manual.
Table E-3. File Format and Limits Table for File Open Behavior
Using This Function
To Open This
File...
32-Bit OSS
APIs such as
open( )
64-Bit OSS
APIs such as
open64( )
Guardian APIs
without 64-Bit
elections
Guardian APIs
with 64-Bit
elections