similar to: How to get the checkpoint size in remus code?

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

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

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 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

hi guys, It''s my first time here and in a mailing lists, I only participated in forums before. Please, If I make a mistake you should advise me. Let''s go! I was reading "xencommons not start" in a Remus Forum in order to install Remus. Well… I followed the tutorial < http://remusha.wikidot.com/configuring-and-installing-remus>, I reboot in xen_unstable and I had

hi guys, It''s my first time here and in a mailing lists, I only participated in forums before. Please, If I make a mistake you should advise me. Let''s go! I was reading "xencommons not start" in a Remus Forum in order to install Remus. Well… I followed the tutorial < http://remusha.wikidot.com/configuring-and-installing-remus>, I reboot in xen_unstable and I had

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

I noted a possible problem restoring a machine. In xc_domain_restore (xc_domain_restore.c) if it''s not the last checkpoint we set O_NONBLOCK flag (search for fcntl) that we can call pagebuf_get or just load other pages (see following "goto loadpages;" line). Now we could ending up calling xc_tmem_restore/xc_tmem_restore_extra (xc_tmem.c) which call read_extract (xc_private.c)

Hardware: Dell Poweredge R510 (32G ram, 8 CPU- Xeon) 64bit - xen 4.0.1 stable 64bit - 2.6.32.18 dom0 (.config attached) running Ubuntu 10.04 32 bit - 2.6.18.8 domU (.config attached) running ubuntu 8.04 domU has 3 tap2 disks, on lvm snapshots. domU has 2G mem, 2 VCPU workload on domU - ssh + top running, destroy domain -- This works . But, If i run a heavier workload say postgres db (just

I noticed recently that there is no real easy way to get the kernel driver for blktap working in mainline. I''ve pulled down the source from Daniel Stodden''s linux git tree on xensource, but it looks like it''s for debian and I''m running Fedora 14, so I''m trying to sort it out. I run the 3.1.x kernel and don''t want to go back to the 2.6.32 that

# 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

Dear List, i''m experimenting with remus with the following setup. dom0: - Debian Squeeze - Jeremy''s 2.6.38.48 kernel - xen 4.1.2 recompiled from sid - DRBD for block device backend domU - Debian Squeeze Remus is working fine unless i try to give more than 1 core to the domU. Here''s the error from remus when i''m trying to enable it for an SMP domU:

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, 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 there, We are using latest version of XCP on 6 hosts. While issuing VM.start or VM.start_on xmlrpc functional call , it says : {''Status'': ''Failure'', ''ErrorDescription'': [''SESSION_INVALID'', ''OpaqueRef:cfb6df14-387d-40a1-cc27-d5962cba7712'']} However if I put VM.start in a loop maybe after

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

This patch series adds support for preservation of the VM generation ID buffer address in xenstore across save/restore and migrate, and also code to increment the value in all cases except for migration. The first patch modifies creation of the hvmloader key in xenstore and adds creation of a new read/write hvmloader/generation-id-addr key. The second patch changes hvmloader to use the new key (as

# HG changeset patch # User Olaf Hering <olaf@aepfle.de> # Date 1359648298 -3600 # Node ID 256d59b2bc8a413876559dc8daf4c52ba46677de # Parent 12455da211d4e841692b2374086356a87eb74ff7 libxl: pass debug flag down to libxl_domain_suspend libxl_domain_suspend is already prepared to handle LIBXL_SUSPEND_DEBUG, and xl migrate handles the -d switch as well. Pass this flag down to

This patch series adds support for preservation of the VM generation ID buffer address in xenstore across save/restore and migrate, and also code to increment the value in all cases except for migration. Patch 1 modifies the guest ro and rw node creation to an open coding style and cleans up some extraneous node creation. Patch 2 modifies creation of the hvmloader key in xenstore and adds