| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 83.1 | | HYEND::BLYONS | VAXcluster SASE | Tue Jul 03 1990 11:44 | 10 |
| - VMS 5.4 will provide Host-based shadowing for cluster storage
- FDDI will provide a long(er) distance cluster interconnect
I don't know about 4 miles but concurrent but separated shadowed
data is going to available in the not too distant future.
Does that solve your problem?
Bob L.
|
| 83.2 | is this what you meant? | ZPOV03::HWCHOY | FE110000 | Wed Jul 04 1990 01:21 | 21 |
| re .-1
is this what you meant?
where x's are members of a shadowset
___hsc--o-o-x-o disk farm ___hsc--o-x-o-o
/ /
SC *-----VAX... *-----VAX...
| |
| |
| |
=====================================================================
FDDI
Do you mean the 2 sets of CI-cluster can be in a single VAXcluster? And
that shadowing is supported across the 2?
Rgds,
hw
|
| 83.3 | Yeh, that's what he means, but don't make any promises you can't keep | CVG::PETTENGILL | mulp | Thu Jul 05 1990 03:24 | 18 |
| Yes, that's what he means.
But, there are a number of questions that remain unanswered:
Will the timing of VMS support for FDDI, FDDI adapters, and performance
optimizations and a whole bunch of questions about delays and reliability
be resolved in time for this customer to upgrade to the required version of
VMS in that time frame? Two years isn't a very long time when you consider
the total length of the product design, implementation, test, release, customer
integration, test, and deployment.
Will public carrier service be available and will DEC have the components in
place to support the distance. If the customer is in NYC, then in two years
he may be able to get fiber service and they may be fiber `modems' and
other stuff to connect two FDDI segments over that distance. This application
is probably not a candidate for TransLAN bridges and T1!
I wouldn't make any promises.
|
| 83.4 | | HYEND::BLYONS | VAXcluster SASE | Thu Jul 05 1990 09:54 | 8 |
| The answer is even better than the diagram in 83.2, you don't
necessarily need the Star couplers and HSC storage controllers
at one or both locations.
But, as .3 said, it takes time to implement all these planned
features and two years to get it all on-line might be tight.
Bob L.
|
| 83.5 | now I'm getting confused... | ZPOV03::HWCHOY | FE110000 | Sun Jul 08 1990 13:03 | 21 |
| re .last few,
thanx for the warning...
this is a military customer, so they'll be responsible for getting the
fiber laid (they probably wouldn't tell us where the physical cables
run). They need backup sites that is >30km apart, with about 200
workstations generating db transactions to the central store. Our
thinking is that, if volumes can indeed be shadowed across that
distance on FDDI, than the entire business would be ours (we're talking
about 200+ DECstation 5000s and 110 TPS of capacity at the central
store and backup site).
I desperately need to know what the plans are for this space. Can
anyone provide a name that I can contact to source for more info? I
will get my management to get in touch if it's way above my head.
thanx,
hw
Singapore SWS
|
| 83.6 | product management for FDDI clusters | HYEND::BLYONS | VAXcluster SASE | Mon Jul 09 1990 10:46 | 8 |
| RE: .5
Start with Fred Howell on node LESCOM:: or Gailyn Casaday on node HYEND::
They are the two product management managers involved with FDDI clusters.
Regards,
Bob L.
|
| 83.7 | | ZPOV03::HWCHOY | FE110000 | Tue Jul 10 1990 00:12 | 5 |
| re .-1
Thanx for the names.
hw
|