similar to: HA problem

# HG changeset patch # User Shriram Rajagopalan <rshriram@cs.ubc.ca> # Date 1302544427 25200 # Node ID fefe3359ab726e634c00704eadeacfcf30b70c07 # Parent 697ac895c11c6d5d82524de56796cee98fded2a5 remus: fix incorrect error handling for switch_qemu_logdirty in checkpoint code c/s 22275: "tools: cleanup domain save switch_qemu_logdirty callback" introduced a whole bunch of error code

hi folks, i have now a squeeze box, 2.6.39.3, xen 4.2 unstable running. for a remus sync, I need the disks (lvm) to besynced which I wanted to do with drbd protocol D. I downloaded the source from git://aramis.nss.cs.ubc.ca/drbd-8.3-remus drbd-8.3-remus page and made: (http://remusha.wikidot.com/configuring-and-installing-remus) git clone git://aramis.nss.cs.ubc.ca/drbd-8.3-remus drbd-8.3-remus

If you just want active/standby, you can simply use corosync/pacemaker as other already suggest and don?t use Director. I have a dovecot HA server that uses floating IP and pacemaker to managed it, and it works quite well. The only real hard part is having a HA storage. You can simply use a NFS storage shared by both servers (as long as only one has the floating IP, you won?t have issue with the

Hi Sriram, Once again, thanks for your timely reply.... I tested as your suggesstion and i found that i don''t have any file in the location "/var/lib/xen" [root@globushead xen]# pwd /var/lib/xen [root@globushead xen]# ls -ll total 0 Further i tested the command "xm save " and results as follows Terminal 1: xm save -c TestVM1 TestVM1.chkpt

Hi, I''m doing my master research and I need to adapt remus code. Now... I wanna get the checkpoint size (memory + disk) on each period. Does someone know what function does this? I think some *fd *object''s function in remus code could just get the memory size. Does someone help me? Thanks _______________________________________________ Xen-devel mailing list

Hi everyone I've installed package xen-hypervisor-4.0-i386 (and related) on debian squeeze, using the available debian packages. According to the Remus website http://nss.cs.ubc.ca/remus/ and xen websites, remus (binary) should be available since xen 4.0.1. I can't find the binary though. I have installed: ii libc6-xen 2.11.2-7 Embedded GNU

Hi Guys, I''m working with: 1. xen 4.1; 2. dom0 ubuntu kernel 3.2 I''m trying to run remus with disk replication (I can run without disk replication). But I read I need to use tap2 < http://nss.cs.ubc.ca/remus/doc.html>. Well... first I tried to create a pv guest. Then I take this guest.cfg: 1. name = "ubuntu-ha" 2. memory = 256 3. disk =

Hello I successfully upgraded to xen 4.0 on my Gentoo servers and I''m trying to use remus to enhance servers'' HA. first of all: I''ve tried remus with --no-net option just to test and it works fine, if I try to run it without that option it just stops claiming that no sch_queue module can be loaded. That module is present in xen 4.0 source tree, but my gentoo seems not

Hi, I would like to announce the first release of Kemari, an open-source virtual machine synchronization mechanism for fault tolerance. It offers a feasible approach to fault tolerance that does not require the use of specific hardware or modification of applications/OS. Kemari aims to keep VMs transparently running in times of hardware failures. It transfers the state of the primary VM to the

Hi, The following patch series fixes hangup after creating checkpoint on Xen. The Linux Xen guest can be saved the state to restore later, and also created snapshot like checkpoint via the hypervisor. But, when the snapshot is created for the PV guest, it will hangup. We added ''PMSG_CANCEL'' message and ''cancel'' handler in dev_pm_ops struct in the pm-linux

This patch series adds support for network buffering in the Remus codebase in libxl. Changes in V3: [1/5] Fix redundant checks in configure scripts (based on Ian Campbell''s suggestions) [2/5] Introduce locking in the script, during IFB setup. Add xenstore paths used by netbuf scripts to xenstore-paths.markdown [3/5] Hotplug scripts setup/teardown invocations are now

Dear all, I have installed DRBD 8.3.11 compiled from sources. However the backend block will freeze if there is high IO load. I use Remus to support high availability and checkpointing is controlled by remus for each 400ms. If I check the Iostat I got the idle CPU will decreasing extremely each checkpointing and when its reach 0% of idle cpu the local backing device will freeze and damage the

Hello, we are using debian, xen 3.x and a iscsi-storage with ext4 as filesystem. Heartbeat is used for xen-ha. Now we like to change to xen 4 and remus. The iscsi SAN is available on active-Dom0 and backup-Dom0. I don´t have to use the disk buffering, as I understand remus right, because the file system on both machines is the same. With ext4 we don´t had problems at the xen3-Cluster on

Hi guys, In my research, I want to change checkpoint interval during remus running. I think that the checkpoint_settimer function (declared in libcheckpoint.c) can do that I need. But I would like to call a checkpoint_settimer in xc_domain_save.c. Then I created a checkpoint_settimer*2* into xc_domain_save.c and this doesn''t work coz probably the timer_settime function there. Then I

Hello, I have been playing around with Remus on Xen 4.0.1, attempting to fail-over for an HVM domU. I''ve run into some problems that I think could be related to tapdisk2 and its interaction with how one sets up Remus disk replication in the domU config file. A few things I''ve noticed: -The tap:remus:backupHostIP:port|aio:imagePath notation does not work for me, although this

Hi All, I want to test REMUS over XEN, I would like to know the basic steps to be followed . I have installed xen4.1 on debian and i didn''t find any command related to remus, is there any steps which i have to carry out? _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users

Hi, I am trying to understand and change the network buffering that is being used by Remus, the HA solution present in Xen. From what i understood from reading the code, Remus calls the postsuspend method of the BufferedNIC after it suspends the domain that sends TC_PLUG_CHECKPOINT message and start the buffering and then calls the commit method of BufferedNIC after it gets the acknowledgement

Use PM_FREEZE, PM_THAW and PM_RESTORE power events for suspend/resume/checkpoint functionality, instead of PM_SUSPEND and PM_RESUME. Use of these pm events fixes the Xen Guest hangup when taking checkpoints. When a suspend event is cancelled (while taking checkpoints once/continuously), we use PM_THAW instead of PM_RESUME. PM_RESTORE is used when suspend is not cancelled. See

Hi all, I installed a Linux-HA-cluster with DRBD and Asterisk 1.4 on it. Actually it might work quite good, failover etc. works, even if this is not a 0-downtime solution, because current calls are dropped and the phones not are reachable until they reregister at the Asterisk. It "might" work good, because my phones are not able to register at the cluster-ip address, because the

Hi, I''m new in Xensource World. I have to work on Xen 3.1.2 hypervisor, I''ve done some searches on how to make Xen HA (not FT for the moment).The way that is come again and again is to make a cluster with Corosync, pacemaker, DRDB. I just want to now if there are others way to do Xen HA, and which is the best way in your opinion?I need something very stable and sustainable.