>
> Actually, pacemaker can do live migrations with some limitations. If the
> server on which the domU is running suddenly crashes, then domU does
> have to be booted from scratch on the other server. But if one server is
> taken down gracefully, Pacemaker can live migrate the domU (not
> instantaneous but only takes a few seconds). This does require that the
> domU disk images reside on shared storage though (NFS or a clustered
> file system like GFS or OCFS).
Right...my point was not to say that Pacemaker cannot do live migrations, but
that Pacemaker does not keep a paused, up-to-date copy of the domU running
somewhere else. So, if a domU crashes, or becomes unavailable for some reason,
Pacemaker has to start from scratch, so there is downtime. Many folks can live
with that, especially since, with decent server hardware, boot time of a domU
is on the order of 10-30 seconds, depending on the services running on the
domU. Others, however, want zero downtime - Remus is designed to cover these
situations.
-Nick
--------
This e-mail may contain confidential and privileged material for the sole use
of the intended recipient. If this email is not intended for you, or you are
not responsible for the delivery of this message to the intended recipient,
please note that this message may contain SEAKR Engineering (SEAKR)
Privileged/Proprietary Information. In such a case, you are strictly
prohibited from downloading, photocopying, distributing or otherwise using this
message, its contents or attachments in any way. If you have received this
message in error, please notify us immediately by replying to this e-mail and
delete the message from your mailbox. Information contained in this message
that does not relate to the business of SEAKR is neither endorsed by nor
attributable to SEAKR.
_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users
|
Home