[Info-vax] Volume Shadowing internals

[Robert A. Brooks]

On 11/2/2023 7:50 AM, El SysMan wrote:
> Great thanks for references  VMS OldBoys!
> 
> I have a small task to implement a cross-site replication of block
> devices. So, i simply made "full copy" of source device to target  -
> it's acceptable for NVMEoF in the LAN, but in case of "cross-site" we
> need to reduce a traffic. I have supposed that Volume Shadowing may
> contains some kind of optimization to exclude copying unallocated
> LBN-s for example or may be maintain a bitmap for updated
> pages\buckets from last "synchronization" ...

Read up on mini copy, host-based minimerge, and $ INIT/SHAD for ways to
reduce copy and merge times.
  
-- Rob


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