similar to: A simple backup

Hi all, This is my first post to the list, I hope someone out there can help! I am running xen 3.0.3, with CentOS 5.2 based Dom0 (kernel-xen-2.6.18-92.1.22.el5) Recently I have noticed some complete system lockups on a few different servers. Neither Dom0 or any of the guests respond to pings, connecting a keyboard and monitor to the system only shows a blank screen. Nothing is written to logs

Hi all. I''m using sles11 for my xen servers. I would really like to be able to do hot snapshots of disk AND memory, and then have these snapshots backed up to tape or off site for disaster recovery. I''m thinking this would be done weekly or monthly, not nightly. Two questions: 1) Is this even possible? 2) I could probably have the systems shutdown to make a clean backups, but

Hi all, I am running Xen 3.2-1 / 2.6.18 on Debian Etch (Dom0). I setup a Dom0 with several DomUs (Linux). Each DomU disk is a LV partition. I have been seeing a few mails about backups and LVM and just wanted to make sure that what I am doing is correct. Each DomU with a database has a cron that dumps the db with mysqldump. Later on, Dom0 will do an LVM Snapshot of all DomUs and then do a

Is there any reason why I would not want to set dom0-min-mem to 0 or to what I set dom0_mem on my kernel line? Setting to 0 or setting to the same value as dom0_mem disables memory balloon correct? I cant seem to think of a reason why I would want memory ballooning. Also setting dom0-min-mem should that be done in xend-config.sxp or on the kernel command line? -- Nick Anderson

Hi all, I''m doing my first xen, running with 3 domU perfect. I need to know which way to backup domU to restore these to another server if i''ve problem with this machine. There are 3 LVM with 10G in VolGroup01 for each domU, with each of these partitions: /dev/xvda3            8,7G  1,4G  6,9G  17%

Please tell me if I am wrong : Xen needs LVM to perform domU snapshots and snapshots must be performed by dom0. By the way, a LVM volume group should not be used by more that one kernel at the same time. So if we use a SAN storage, one volume group should be activated on only one server and deactivated on the others. But if we do that, it should not be possible to perform live migration of

Hello Everyone, We have noticed that one of our servers xen Dom0 is restarting idiopathically. Atleast, we are not able to analyze the cause. I have checked the logs but couldn''t find anything relating to it. Are there any tools such as kdump (which doesn''t seem to work on xenified kernels) for catching the kernel crash snapshot. Regards, Sree Harsha Totakura Member, Open

I realize this might be one of those religious topics, but is there any good rule of thumb as to how to setup storage for a Xen domU? Without really knowing any better, I''m basically going to make a disk image of the OS and the create a ''data'' partition on my raid 5 volume for each virtual machine. This is for use at home, so in reality it probably doesn''t

Hi all. We just put a relative large server in operation (for our measures ;-) ), a 4x Dual Core / Intel with 16GB Ram and a 3ware 9550SX SATA-RAID with 4 drives. Operating system for the Dom0 is an up-to-date gentoo linux. Everything runs really fine, there are 4 Domu''s running, 1x gentoo and 2x debian and 1x Windows Server 2003. DomU''s are running blazing fast in normal

Hi, I am planning the roll out of a Xen dom0 running CentOS that is going to be running two DomU''s CentOS and Windows 2003 SBS. I am planning on using LVM for the disks as this (so i have read) increases i/o performance compared to image files. I need a solution to back up these machines and I have came up with the following two ideas: Idea 1, Backup the machines as images (lvm

Hello guys Does anyone use lvm2 backends for domU storages ? I do and I wanted to use lvm''s snapshot feature to make backups of domUs in background but I got the following problem. When I create a snapshot LV and copy data from it to backup storage it works perfect. Then I do umount and then lvremove. lvremove asks me if I really want to remove the volume and then just hangs forever.

Hi all I''d like to know if it''s possible to clone a running domU. I need to make an exact copy of an existing CentOS xen domU, but without taking it offline. I''m using LVM, so I don''t know if it will help. I have tried doing it with dd, after shutting down the domU, but it takes ages. The LVM image is 30GB. I can''t really afford to have the

Hello Everyone. Well i want to write some information (not a complete backup) from my Virtual Machine to the tape drive, but the VM can''t read it. I guess i need to attach this device to the VM so it can read and write the tape driver but i don''t know how to do that, i found something similar but with a cd: # xm block-list <vm-id> –long # xm block-detach 1 5632 -f # xm

Hi all, I started studying xen to implement some HA cluster hosting multiple guests. I am realizing that xen does not provide any native way to hot-clone or hot-backup a guest. Am I right ? Is there any way to how backup a virtual machine? Or is suspend - copy - resume the only possible tecnique ? Is there any way to clone a virtual machine? Do vm snapshots exists? Thank you for every answer!

Hi. I''m using Xen on RHEL cluster, and I have strange problems. I gave raw volumes from storage to Xen virtual machines. With windows, I have a problem that nodes don''t see the volume as same one.... for example: clusternode1# clusvcadm -d vm:winxp clusternode1# dd if=/dev/mapper/winxp of=/node1winxp clusternode2# dd if=/dev/mapper/winxp of=/node2winxp clusternode3# dd

Hi. I entered one of our domU tonight and see following problem: # iowait -k 5 avg-cpu: %user %nice %system %iowait %steal %idle 0.00 0.00 0.00 100.00 0.00 0.00 Device: tps kB_read/s kB_wrtn/s kB_read kB_wrtn sda1 0.00 0.00 0.00 0 0 sda2 0.00 0.00 0.00 0

I''ve been using lvm under centos to create the backing store for domUs and although the performance seems acceptable it has some shortcomings. The biggest of which is the LVM bug which prevents me from removing an lv (it says it is still mounted and it definitely isnt). I thought this was just a centos bug but it appears to be evident in debian and ubuntu too and I really can''t

Hello, I have noticed that when I use xen-create-image to generate an domU, the whole server (dom0 and domU''s) basically hangs until it is finished. This happens primarily during the creation of the ext3 filesystem on an LVM partition. This creation of the file system can take up to 4 or 5 minutes. At which point, any other domU''s are basically paused... tcp connections time

Hi folks, Host - Debian Etch Guests - Debian Etch. Performed following steps to create duplicate guest, a mail server. 1) # cp /etc/xen/guest-1.cfg /etc/xen/guest-2.cfg edit guest-2.cfg changing the settings of:- disk = [''file:/vserver/domains/guest-2_directory/disk.img,hda1,w'', ''file:/vserver/domains/guest-2_directory/swap.img,hda2,w''] # Hostname name

Hi! How do i create consistent snapshots of VM''s from Dom0?. What are the backup methods or snapshot/snaprestore methods that are followed for Xen Virtual environments?. thoughts/ideas?. -- I have the simplest of tastes; I am easily satisfied with the best. _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com