In the past, using slapd under Xen has been problematic due to the issue here:
https://bugzilla.redhat.com/show_bug.cgi?id=91933
as reported here as well:
http://www.openldap.org/lists/openldap-software/200603/msg00214.html
I know that at least as recently as Xen 3.0.4, this was a problem.
This was brought up on the Xen devel list, and their answer is found here:
http://lists.xensource.com/archives/html/xen-devel/2008-04/msg00167.html
Does their explanation seem to make sense? It sounded to me like they weren't 100% sure of their understanding of the issue. But it would be nice to be able to have something we could put in the FAQ to address this if this does address the problem.
--Quanah
--
Quanah Gibson-Mount Principal Software Engineer Zimbra, Inc -------------------- Zimbra :: the leader in open source messaging and collaboration
On Tuesday 08 April 2008 19:51:08 Quanah Gibson-Mount wrote:
In the past, using slapd under Xen has been problematic due to the issue here:
https://bugzilla.redhat.com/show_bug.cgi?id=91933
as reported here as well:
http://www.openldap.org/lists/openldap-software/200603/msg00214.html
I know that at least as recently as Xen 3.0.4, this was a problem.
This was brought up on the Xen devel list, and their answer is found here:
http://lists.xensource.com/archives/html/xen-devel/2008-04/msg00167.html
Does their explanation seem to make sense? It sounded to me like they weren't 100% sure of their understanding of the issue. But it would be nice to be able to have something we could put in the FAQ to address this if this does address the problem.
On a modern distribution, OpenLDAP (and other software using NPTL) should work without problems. The requirements are:
-Xen 3.1 hypervisor with PAE (older versions may also work) -Recent-enough glibc (2.4, or 2.3 with the correct patches)
IOW, RHEL5/Centos 5 should work fine. In my experience this is the case. I fired up OpenLDAP 2.4.7 with db4.6 (with NPTL) on a RHEL 5.1 Xen DomU (I don't currently have a working RHEL5 Dom0) this morning without problems, and in the past I have run a more complete setups on Xen Dom0s.
Regards, Buchan
--On April 9, 2008 5:13:50 PM +0200 Buchan Milne bgmilne@staff.telkomsa.net wrote:
On a modern distribution, OpenLDAP (and other software using NPTL) should work without problems. The requirements are:
-Xen 3.1 hypervisor with PAE (older versions may also work) -Recent-enough glibc (2.4, or 2.3 with the correct patches)
IOW, RHEL5/Centos 5 should work fine. In my experience this is the case. I fired up OpenLDAP 2.4.7 with db4.6 (with NPTL) on a RHEL 5.1 Xen DomU (I don't currently have a working RHEL5 Dom0) this morning without problems, and in the past I have run a more complete setups on Xen Dom0s.
In the cases I've seen, OpenLDAP started up just fine, and ran just fine, for a while. But at some point there'd be locking issues, and then the database was toast. So I remain quite leery of trusting that just because OpenLDAP starts that Xen is fine.
--Quanah
--
Quanah Gibson-Mount Principal Software Engineer Zimbra, Inc -------------------- Zimbra :: the leader in open source messaging and collaboration
openldap-technical@openldap.org
-
Buchan Milne -
Quanah Gibson-Mount