I haven't followed this thread that closely, but if the problem is
shared memory support in the db library, then you could try setting this
config file option:
<StorageHints>
...
DBCacheType mmap
...
</StorageHints>
That will make berkeley db use mmap for the cache rather than shared
memory. If the error code is well defined then it should be possible to
insert some code to have it fall back to mmap if the shmem options fail,
or maybe just print a descriptive error message suggesting that the user
try that option.
I happen to have a centos 4 test box here, but I haven't seen this
problem before. Here are the kernel and db versions that it is using:
$ uname -a
Linux centos 2.6.9-34.0.1.EL #1 Wed May 24 07:40:56 CDT 2006 i686 i686
i386 GNU/Linux
$ rpm -qa |grep db4
db4-devel-4.2.52-7.1
db4-4.2.52-7.1
db4-utils-4.2.52-7.1
-Phil
Sam Lang wrote:
Hi Greg,
The path of least resistance for you is to probably build your own db4
and point pvfs2 at that with the --with-db to configure. The db you
have installed seems to have been configured with some options that
disable using shared memory for the cache.
In the long term we should probably look at handling the case where the
db isn't configured to work with shared memory.
-sam
On Jul 11, 2006, at 7:04 PM, Greg Bruno wrote:
On 7/11/06, Robert Latham <[EMAIL PROTECTED]> wrote:
On Tue, Jul 11, 2006 at 09:13:12AM -0700, Greg Bruno wrote:
> ./configure --prefix=/opt/pvfs2 --with-kernel=/usr/src/linux-2.6
> make
> make install
Can you tell us what kernel you are running? It sounds like you might
be running a stock kernel.org kernel?
the node has pre-compiled kernel downloaded from a centos mirror:
# uname -a
Linux compute-0-0.local 2.6.9-34.0.1.ELsmp #1 SMP Wed May 24 08:14:29
CDT 2006 i686 i686 i386 GNU/Linux
# rpm -qi kernel-smp
Name : kernel-smp Relocations: (not
relocatable)
Version : 2.6.9 Vendor: CentOS
Release : 34.0.1.EL Build Date: Wed 24 May
2006 05:22:43 AM PDT
Install Date: Mon 10 Jul 2006 09:31:34 AM PDT Build Host:
build-i386
Group : System Environment/Kernel Source RPM:
kernel-2.6.9-34.0.1.EL.src.rpm
Size : 28928141 License: GPLv2
Signature : DSA/SHA1, Wed 24 May 2006 02:17:52 PM PDT, Key ID
a53d0bab443e1821
Packager : Johnny Hughes <[EMAIL PROTECTED]>
Summary : The Linux kernel compiled for SMP machines.
Description :
This package includes a SMP version of the Linux kernel. It is
required only on machines with two or more CPUs as well as machines with
hyperthreading technology.
Install the kernel-smp package if your machine uses two or more CPUs.
- gb
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