Dale Ghent wrote:
> On Sep 25, 2007, at 7:48 PM, Richard Elling wrote:
>
>> The problem with this is that wrong information is much worse than no
>> information, there is no way to automatically validate the
>> information,
>> and therefore people are involved. If people were reliable, then even
>> a text file would work. If it can't be automatic and reliable, then
>> it isn't worth doing.
>
> I dunno if I think we have to think this far into it.
>
> Consider the Clearview project and their implementation of vanity
> names for network interfaces. Conceivably, such a feature is useful
> to admins as they can set the name to be a particular vlan number, or
> the switch/blade/port where the other end of the ethernet line is
> terminated. Or their ex-girlfriend's name if it's a particular
> troublesome interface. The point is, it allows arbitrary naming of
> something so that the admin(s) can associate with it better as an
> object. Most importantly, there's a distinction here. Solaris
> provides the facility. It's up to the admin to maintain it. That's as
> far as it should go.
Actually, you can use the existing name space for this. By default,
ZFS uses /dev/dsk. But everything in /dev is a symlink. So you could
setup your own space, say /dev/myknowndisks and use more descriptive
names. You might need to hack on the startup service to not look at
/dev, but that shouldn't be too hard. In other words, if the answer
is "let the sysadmin do it" then it can be considered solved. The
stretch goal is to make some sort of reasonable name service. At
this point I'll note the the FC folks envisioned something like that,
but never implemented it.
# ramdiskadm -a BrownDiskWithWhiteHat 150m /dev/ramdisk/BrownDiskWithWhiteDot
# zpool create zwimming /dev/ramdisk/BrownDiskWithWhiteDot
# zpool status zwimming
pool: zwimming
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
zwimming ONLINE 0 0 0
/dev/ramdisk/BrownDiskWithWhiteDot ONLINE 0 0 0
errors: No known data errors
# ls -l /dev/ramdisk/BrownDiskWithWhiteHat
lrwxrwxrwx 1 root root 55 Sep 25 17:59
/dev/ramdisk/BrownDiskWithWhiteDot -> ../../devices/pseudo/[EMAIL
PROTECTED]:BrownDiskWithWhiteDot
# zpool export zwimming
# mkdir /dev/whee
# cd /dev/whee
# ln -s ../../devices/pseudo/[EMAIL PROTECTED]:BrownDiskWithWhiteHat
YellowDiskUnderPinkBox
# zpool import -d /dev/whee zwimming
# zpool status zwimming
pool: zwimming
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
zwimming ONLINE 0 0 0
/dev/whee/YellowDiskUnderPinkBox ONLINE 0 0 0
errors: No known data errors
-- richard
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