Hi! I''m currently in the process of evaluating Xen. I''ve made a test setup with Debian Sarge as dom0 and a couple of domu''s also with debian sarge. The purpose of the setup is server consolidation, which Xen does a great job with from what I''ve read (And experienced so far :) ). One of the things I would like to run in a domU is an LDAP server. However it has come to my attention that there are some troubles with BDB, OpenLDAP and Xen. Some people are advising against using an LDAP server in an Xen domu (http://www.openldap.org/lists/openldap-software/200603/msg00216.html). I''ve installed OpenLDAP in a domU and ran SLAMD against it to check its performance. The performance seems OK at first sight.>From what I understand Xen''s inability to support Native POSIX Threadingis the root cause for the problems with programs like BDB, OpenLDAP and Fedora Directory Server. Is there anybody who can shed some more light on this for me ? Or beter, somebody who runs a live LDAP server inside a domU ? Thanks in advance, Jasper Siepkes _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
On Tue, May 30, 2006 at 12:01:51PM +0200, jsiepkes@planet.nl wrote:> Hi! > > I''m currently in the process of evaluating Xen. I''ve made a test setup > with Debian Sarge as dom0 and a couple of domu''s also with debian sarge. > The purpose of the setup is server consolidation, which Xen does a great > job with from what I''ve read (And experienced so far :) ). > > One of the things I would like to run in a domU is an LDAP server. > However it has come to my attention that there are some troubles with > BDB, OpenLDAP and Xen. Some people are advising against using an LDAP > server in an Xen domu > (http://www.openldap.org/lists/openldap-software/200603/msg00216.html). > > I''ve installed OpenLDAP in a domU and ran SLAMD against it to check its > performance. The performance seems OK at first sight. > > >From what I understand Xen''s inability to support Native POSIX Threading > is the root cause for the problems with programs like BDB, OpenLDAP and > Fedora Directory Server. Is there anybody who can shed some more light > on this for me ? Or beter, somebody who runs a live LDAP server inside a > domU ?I run OpenLDAP (from Debian 3.1) with bdb backend in a Xen 3.0.2 (from Sid) dumU (with Sarge) without any problem. But I have to say that it is for a _really_ small system. I do not know how would it behave on a large system. Regards, Diego.> Thanks in advance, > > Jasper Siepkes > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Or beter, somebody who runs a live LDAP server inside a> domU ? > > Thanks in advance, >Hi Jasper, I run a couple of instances of Fedora Directory Services inside Xen VMs. Admittedly they are hardly under any strain (we''re a relatively small shop with roughly 50-70 concurrent users) it sits there quite happily ticking along. In fact the DomU in question is sharing the hardware with other DomU''s and then the DomU itself is running a few services (FDS, DNS, DHCP & host for PXE). Box is a HP DL380G4 with dual Xeons (3.4Ghz IIRC) and 4GB RAM. I''ve only allocated 512MB RAM to the FDS/DNS/DHCP/PXE DomU. The other DomU''s are used for software development (mostly building and compiling) so the machine as a whole gets a fair beating. All Dom0 and DomUs are FC4 (32bit). We have an identical box that is configured similarly to allow for some redundancy wrt FDS/DNS/DHCP/PXE. Works like a charm, but as mentioned the FDS/DNS/DHCP/PXE boxen are not really that loaded as we''re a relatively small shop. HTH Dan _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Hi Dan, Thanks for the insight, this is really the info I was looking for. Coincidently I was also thinking of a similar setup, also with a HP DL380. -Jasper -----Oorspronkelijk bericht----- Van: xen-users-bounces@lists.xensource.com [mailto:xen-users-bounces@lists.xensource.com] Namens Dan Hawker Verzonden: woensdag 31 mei 2006 17:58 Aan: jsiepkes@planet.nl CC: xen-users@lists.xensource.com Onderwerp: Re: [Xen-users] Xen, LDAP and Berkeley DB Or beter, somebody who runs a live LDAP server inside a> domU ? > > Thanks in advance, >Hi Jasper, I run a couple of instances of Fedora Directory Services inside Xen VMs. Admittedly they are hardly under any strain (we''re a relatively small shop with roughly 50-70 concurrent users) it sits there quite happily ticking along. In fact the DomU in question is sharing the hardware with other DomU''s and then the DomU itself is running a few services (FDS, DNS, DHCP & host for PXE). Box is a HP DL380G4 with dual Xeons (3.4Ghz IIRC) and 4GB RAM. I''ve only allocated 512MB RAM to the FDS/DNS/DHCP/PXE DomU. The other DomU''s are used for software development (mostly building and compiling) so the machine as a whole gets a fair beating. All Dom0 and DomUs are FC4 (32bit). We have an identical box that is configured similarly to allow for some redundancy wrt FDS/DNS/DHCP/PXE. Works like a charm, but as mentioned the FDS/DNS/DHCP/PXE boxen are not really that loaded as we''re a relatively small shop. HTH Dan _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users