HEADSUP: Filesystem rototiling over
Andre Guibert de Bruet
andy at siliconlandmark.com
Sat Oct 30 21:43:11 PDT 2004
On Sat, 30 Oct 2004, Jens Rehsack wrote:
> Poul-Henning Kamp wrote:
>>>>> Oh, that means for each update you have to stop all jails running
>>>>> on those mounts? How useful could that be on production machines?
>>>>
>>>> I don't know, that depends on what you use jails for.
>>>
>>> Web-Service(s), Mail-Service(s), Name-Service, ...
>>>
>>> And on each update I had to stop the services, shutting down the jail,
>>> unmount each ro-bunch, mount rw, update, unmount, remount ro-bunches,
>>> starting jails & services.
>>
>> Then this is probably not a good thing for your installation.
>
> Maybe someone could point some usages where it's a good thing...
It would be very useful for a re-imaging system on a shared-hosting host,
with numerous jails. You could write scripts to have an end-userrestore a
jail back to its original state through this mount. In this case, the
filesystem wouldn't be terribly useful, except when re-imaging, so
unmounting all mounts isn't that big of a deal.
I do agree that it would be nice to be able to have one RW mount and a ton
of RO mounts. I would even be willing to settle for having to mount the RW
mount first and have this operating fail if the filesystem is already
mounted RO somewhere.
Andy
| Andre Guibert de Bruet | Enterprise Software Consultant >
| Silicon Landmark, LLC. | http://siliconlandmark.com/ >
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