Open System Services Management and Operations Guide (G06.30+, H06.08+, J06.03+)

F Environment Limits
This appendix summarizes the architectural and functional limits that apply to the Open System
Services environment on NonStop servers. Limits for a specific release version update (RVU) are
subject to increases as software product revisions (SPRs) occur.
OSS application programs that conform to POSIX.1 conform to a set of limits defined by the POSIX
standards; POSIX limits can be less than those imposed by the environment. Refer to the header
files used by a specific application to determine the current settings of that program’s programmatic
limits; for example, most programs use /usr/include/limits.h.
Table 20 OSS Environment Limits
To Check Amount Currently
UsedCommentMaximum ValueDescription
At a TACL prompt in the
catalog subvolume, the
The limiting factor is the
number of inodes used
2.2 millionOSS files in one fileset
command: FUP INFOwithin the fileset; inodes are
used for any entry in the
PXINODE, STAT gives a
fileset: directories, named
rough approximation; the
pipes (FIFOs), files,
PXINODE file groups free
AF_UNIX sockets, and so
forth.
inodes into a single record.
At an OSS shell prompt,
For G-series RVUs prior to
G06.24 (prior to PVU
using the fileset mount point
(mtpt) in the command: ls
-W NOG -W NOE -R mtpt
T8621G11), the limit was
500,000 inodes per fileset.
| wc -l gives a rough
approximation (also skips
For G-series RVUs prior to
G06.18 (prior to SPR
free inodes). If the fileset
directory tree contains the
T8621AAU), the limit was
250,000 inodes per fileset.
mount point for another
fileset, the inodes of that
fileset will also be listed.
248 charactersOSS filename
1024 charactersOSS pathname
For J06.03 and later J-series
RVUs, H06.06 and later
Approximately 1 terabyte
(constrained by the space
OSS file size
H-series RVUs, and G06.29available on the disk
and later G-series RVUs, thevolume) for J06.03 and later
file size limit depends on theJ-series RVUs, H06.06 and
function used to open thelater H-series RVUs, and
file. For details, see “OSSG06.29 and later G-series
RVUs and Guardian Enscribe File
Formats and File Size Limits”
(page 418).
For H-series RVUs prior to
H06.06 and G-series RVUs
prior to G06.29, the limit
was Approximately 2
gigabytes.
411