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CISAM file usage in AIX4.3

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Operating Systems AIX CISAM file usage in AIX4.3
# 1  
Old 05-26-2008
CISAM file usage in AIX4.3
As we know CISAM files can be used up to 2G in UNIX. But I am failed to write record to file below:

-rw-rw-rw- 1 bit profit 1073741312 20 Apr 06:38 pfszzzzz.dat
-rw-rw-rw- 1 bit profit 151461888 20 Apr 06:38 pfszzzzz.idx

my ulimit setting is like below:

# ulimit -a

time(seconds) unlimited
file(blocks) unlimited
data(kbytes) 131072
stack(kbytes) 32768
memory(kbytes) 32768
coredump(blocks) unlimited
nofiles(descriptors) 2000

So, my question is the maximum file size for CISAM file is 2G for .dat and 2G for .idx? Or 1G for .dat and 1G for .idx?

Thanks.
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LEARN ABOUT V7

tm

TM(4)							     Kernel Interfaces Manual							     TM(4)

NAME

       tm - TM-11/TU-10 magtape interface

DESCRIPTION

       The  files mt0, ..., mt7 refer to the DEC TU10/TM11 magtape.  When closed it can be rewound or not, see below.  If it was open for writing,
       two end-of-files are written.  If the tape is not to be rewound it is positioned with the head between the two tapemarks.

       If the 0200 bit is on in the minor device number the tape is not rewound when closed.

       A standard tape consists of a series of 512 byte records terminated by an end-of-file.  To the extent possible, the system makes it  possi-
       ble, if inefficient, to treat the tape like any other file.  Seeks have their usual meaning and it is possible to read or write a byte at a
       time.  Writing in very small units is inadvisable, however, because it tends to create monstrous record gaps.

       The mt files discussed above are useful when it is desired to access the tape in a way compatible with ordinary files.  When foreign  tapes
       are to be dealt with, and especially when long records are to be read or written, the `raw' interface is appropriate.  The associated files
       are named rmt0, ..., rmt7.  Each read or write call reads or writes the next record on the tape.  In the write case the record has the same
       length  as the buffer given.  During a read, the record size is passed back as the number of bytes read, provided it is no greater than the
       buffer size; if the record is long, an error is indicated.  In raw tape I/O, the buffer must begin on a word boundary and the count must be
       even.   Seeks are ignored.  A zero byte count is returned when a tape mark is read, but another read will fetch the first record of the new
       tape file.

FILES

       /dev/mt?, /dev/rmt?

SEE ALSO

       tp(1)

BUGS

       If any non-data error is encountered, it refuses to do anything more until closed.  In raw I/O, there should be a way  to  perform  forward
       and backward record and file spacing and to write an EOF mark.

																	     TM(4)