[Info-vax] OpenVMS x86-64 and RDB and DB's in general on OpenVMS

[Jan-Erik Soderholm]

JF Mezei skrev den 2015-06-30 21:12:
> On 15-06-30 09:08, clairgrant71 at gmail.com wrote:
>
>> Porting Oracle and Rdb to VMS are both huge, but very different, undertakings.
>
>
> On the one hand, one is told that for most ports, it is just a matter of
> recompiling.  (I realise there is the cost/trouble of testing/validating
> etc).
>
> What sort of system features would Oracle and RDB use which are
> architecture specific and require much work to port from one 64 bit
> architecture to another on the same opertating system ?

The specific architecture in itself!

Today Rdb produces IA64 machine code on the fly (and before that
VAX and Alpha naitive machine code), and that will need to be
ported to X86 machine code. The same for the pre-compilers that
also compiles the SQL EXEC, END EXEC sections into machine code.

There is also a need for a supported X86 version of BLISS. The
lack of that made the "Rdb8 for NT" to be canceled. That is
probably also need for VMS in itself, anyway... :-)

Here are two documents that talkes about the port to Itanium.

http://download.oracle.com/otndocs/products/rdb/pdf/rdbtf05_itaniumport.pdf

http://h71000.www7.hp.com/openvms/journal/v14/rdb_interp_compile.pdf