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Provide a build-time option to store large relations as single files, rather

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than dividing them into 1GB segments as has been our longtime practice.  This
requires working support for large files in the operating system; at least for
the time being, it won't be the default.

Zdenek Kotala
This commit is contained in:
Tom Lane
2008-03-10 20:06:27 +00:00
parent b6912af22b
commit f0828b2fc3
12 changed files with 595 additions and 100 deletions
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15
configure.in
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@ -1,5 +1,5 @@
dnl Process this file with autoconf to produce a configure script.
dnl $PostgreSQL: pgsql/configure.in,v 1.552 2008/02/24 05:21:54 tgl Exp $
dnl $PostgreSQL: pgsql/configure.in,v 1.553 2008/03/10 20:06:27 tgl Exp $
dnl
dnl Developers, please strive to achieve this order:
dnl
@ -217,6 +217,12 @@ fi
AC_SUBST(DTRACEFLAGS)])
AC_SUBST(enable_dtrace)
#
# Data file segmentation
#
PGAC_ARG_BOOL(enable, segmented-files, yes,
[ --disable-segmented-files disable data file segmentation (requires largefile support)])
#
# C compiler
#
@ -1411,6 +1417,13 @@ if test $ac_cv_func_fseeko = yes; then
AC_SYS_LARGEFILE
fi
# Check for largefile support (must be after AC_SYS_LARGEFILE)
AC_CHECK_SIZEOF([off_t])
if test "$ac_cv_sizeof_off_t" -lt 8 -o "$enable_segmented_files" = "yes"; then
AC_DEFINE([USE_SEGMENTED_FILES], 1, [Define to split data files into 1GB segments.])
fi
# SunOS doesn't handle negative byte comparisons properly with +/- return
AC_FUNC_MEMCMP