[Info-vax] VMS - The new file system. What do we know about it?...

[Kerry Main]

> -----Original Message-----
> From: Info-vax [mailto:info-vax-bounces at rbnsn.com] On Behalf
> Of Michael Moroney via Info-vax
> Sent: 12-Nov-16 11:49 PM
> To: info-vax at rbnsn.com
> Cc: Michael Moroney <moroney at world.std.spaamtrap.com>
> Subject: Re: [Info-vax] VMS - The new file system. What do we
> know about it?...
> 
> IanD <iloveopenvms at gmail.com> writes:
> 
> >I'm still curious about the new file system
> 
> >What else can be let loose about it?
> 
> >- Will existing RMS work with it?
> 
> The idea is that existing RMS will work with it.  The new file
> system will have increased performance, and will work on disks
> larger than 2TB.
> 
> >- Does it working across volumes? (i.e. sharding like
abilities)
> 
> Do you mean volume sets? According to the bootcamp
> presentation, the answer is no. Volume sets are a mostly
> obsolete concept anyway.
> 

I agree .. volume sets were primarily a way to make larger
volumes from smaller volumes that were in the lower GB range. 

Today - SINGLE 10TB disks that are self-encrypting with 256MB
cache are available at your local computer shop for approx. USD
$500. Simply google "10TB Seagate".

Assuming the current increase in technology continues, we can
likely expect this to increase to 50TB drives in the next 3+
years.

> >- I understand that it's being revamped to 64 bit internals,
what
> are
> >the limits (i.e. How does it compare to this list/ What's
similar on
> >this
> >list?)
> 
> I do not understand the question.  Right now, as Clair
mentioned,
> work is being done to the executive internals so that disks
larger
> than 2TB will work correctly. This should be in V8.next with
the
> goal being that one can $ MOUNT/FOREIGN a >2TB drive and do
> logical $QIO reads and writes to any valid block on the drive,
but
> not do RMS access. This is low level stuff, like "Give me Disk
Block
> nnnn" or "Give me X blocks (actually X*512 bytes) starting at
Disk
> Block nnnn". It's more complicated than it sounds.
> Marrying the new file system to the 64 bit LBN stuff will have
to
> wait for V9.x.
>

Given the rapidly increasing disk sizes noted above, imho,
getting over the 2TB limit while at the same time increasing
performance is absolutely the right priority.

This is a really big deal when you start to think about how
introducing very cheap 5-10TB disks into your environment will
impact your historical ways of systems operation .. backups,
replication, monitoring and support utilities, file / disk
fragmentation, HW RAID, HBVS shadowing etc.


Regards,

Kerry Main
Kerry dot main at starkgaming dot com