[Info-vax] Command to show process rms file opens?

[Terry Kennedy]

On Thursday, July 30, 2020 at 9:57:04 AM UTC-4, Stephen Hoffman wrote:
> 
> 0: Use SSD.

I admit to not being up on current HP offerings, but don't you need to have a quite recent Itanium system to have SAS/SATA support? And are there HP qualified SSDs available for that hardware? Otherwise we're looking at either external storage (FC SAN) or hard-to-obtain and unsupported controllers (per recent discussions in c.o.v) or out-of-production adapter cards from parallel SCSI or PATA to whatever interfaces your SSDs have. Given the unsupported nature of those, or the cost to switch to FC SAN that supports SSDs, it would seem prudent to do some research to make sure that throwing SSDs at the problem will improve performance enough to be worthwhile (see my earlier replies fo reasons it might not be).

Once VSI releases production grade x86 VMS, a host with some NVMe storage (some of which is capable of 4Gbyte/second data rates) passed through to VMS in a guest VM should give us a better idea of what modern VMS on modern hardware can accomplish. That's one good justification for running in a VM instead of on bare metal- the hypervisor can make the real hardware available to the VM guest(s) while mapping it to a device type supported by the client OS. It helps if the client OS has some understanding of the actual hardware, even if not the exact model, so it can send Trim/Unmap commands to SSDs to take advantage of the performance benefits. I have seen firsthand how well device type remapping works - in my testing of the AlphaVM Pro emulator I was able to map a physical SATA disk to a parallel SCSI drive on the emulated Alpha, even though the command sets are utterly different.