On Jan 14, 2006, at 3:39 PM, Albert Chin wrote:
How do I disable MMAP'ing of RPM database files? I've tried creating
DB_CONFIG in the RPM database directory with:
set_flags DB_NOMMAP
This should have worked no matter what.
and modified the RPM macros file with:
%__dbi_cdb create cdb mpool mp_size=1Mb nommap
Neither work.
All the macros do is permit an alternative means to specify flags
during open.
This is needed to get YUM working on HP-UX because HP-UX doesn't allow
the same file to be mmap()'ed to multiple address spaces.
I'm using RPM 4.2.4. I could hack the Berkeley DB source but I'm
trying to get away from that.
It's unlikely that you need to change Berkeley DB sources. Likelier
is that the flag DB_NOMMAP is tricky to use correctly, and that rpm
is not doing something correctly. It's impossible to say more without
examining strace and looking at code.
I question the wisdom of a mmap(2) that cannot be shared, but that's
yours and HP-UX problem.
73 de Jeff
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