[169294] in North American Network Operators' Group
Re: VMware Training
daemon@ATHENA.MIT.EDU (Dan Shoop)
Thu Feb 20 13:56:29 2014
From: Dan Shoop <shoop@iwiring.net>
In-Reply-To: <64733bcf-9511-4733-9eb7-071dbff36282@email.android.com>
Date: Thu, 20 Feb 2014 13:55:39 -0500
To: Nanog <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
[See below]
On Feb 19, 2014, at 10:46 PM, Jay Ashworth <jra@baylink.com> wrote:
> Why bother with a clustering FS, then, if you cannot actually /use it/ =
as one?
> - jra
>=20
> On February 19, 2014 10:44:22 PM EST, Jimmy Hess <mysidia@gmail.com> =
wrote:
>> On Wed, Feb 19, 2014 at 2:06 PM, Jay Ashworth <jra@baylink.com> =
wrote:
>>=20
>>> ----- Original Message -----
>>>> From: "Eugeniu Patrascu" <eugen@imacandi.net>
>>> [snip]
>>> My understanding of "cluster-aware filesystem" was "can be mounted =
at
>> the
>>> physical block level by multiple operating system instances with
>> complete
>>> safety". That seems to conflict with what you suggest, Eugeniu; am =
I
>>> missing something (as I often do)?
>>>=20
>>=20
>> When one of the hosts has a virtual disk file open for write access =
on
>> a
>> VMFS cluster-aware filesystem, it is locked to that particular =
host,
>> and a process on a different host is denied the ability write to the
>> file, or even open the file for read access.
Ghods how I miss real tightly coupled clustering, shared hierarchical =
storage and true clustered filesystems like in VMS. Here=92s a 35 year =
old OS that still is better than anything we have today. Secure, =
granular prigs, file versioning, multiple simultaneous cluster =
interconnect physical layers, POSIX compliance, heavy distributed =
networking and strong system services built in. When people tell me =
about clustering today and then add these caveats about how clustered =
files aren=92t actually sharable or that you can=92t have complete =
orthogonality.=20
I guess I=92m now old.=20
-d=20
-----
Dan Shoop
shoop@iwiring.net
1-646-402-5293 (GoogleVoice)
