See inline. On Sep 10, 2010, at 5:36 AM, Andrew Hotlab wrote:
> >> Date: Fri, 10 Sep 2010 16:28:15 +1200 >> From: [email protected] >> To: [email protected] >> Subject: Jail hot migration >> >> Hi guys, >> >> I was lately thinking around jail hot-migration feature where one jail >> could be moved from one host to another without >> shutting it down, something like vmotion in VMware world. >> >> The storage layer should be easy with zfs send and receive or some form >> of shared storage. The tricky part would >> be a memory copy from one node to another and also the CPU handling. >> >> Anyone has an idea how this could be achieved? I guess it would require >> a kernel module which could take care of memory >> reservations and a daemon to copy and incrementally sync the jails >> memory across. >> >> Then also there is the CPU problem.. >> >> Sounds like a fair amount of work and development. >> >> All comments are welcomed! >> > Well, I'm not a developer, but I think that the jail framework surely > deservestobe evolved in something more "friendly" from a sysadmin's point of > view. > The architecture is great, and that's just enough to consolidate a lot of > workloads,but for some applications there are features (resource containers, > offline andonline migration of jails, etc.) that need to be improved to be > affordable in aproduction environment. > I think that a lot of work is getting done (resource container and > virtualizationstack projects have ben just sponsored by the FreeBSD > Foundation), I do not knowhow much time will take to reach a complete > "business-ready" virtualizationframework, neither if they are on the right > path, but I'm quite confident, because I'msure that the simplicity of the > FreeBSD solution will rule any other virtualizationframework out there. > As the feature you are asking for, I think that resource containers and > offlinemigration should be considered first, because overall they'll have > more impact onbusiness environments. Further, I believe that building a hot > migration procedureworking with third-party running applications will be a > very complex task to achieve,maybe too expensive at this time, compared to > the amount of work required. > That's an interesting argument, I'll be glad if more member of the Community > willcontribute with their considerations. > Sincerely. > Sorry, I'm accustomed to 'top positing' - LIFO - polish notation. Anyway, yes, is it no the plan that ezjail-admin *MIGHT* be integrated into the FreeBSD core release? Once that is done, anybody could feel comfortable writing a webmin module to manage jails? _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-jail To unsubscribe, send any mail to "[email protected]"
