[coyotos-dev] coyotos.sleep, sleepTill, the epoch

[Valerio Bellizzomi]

On 13/02/2007, at 23.56, Valerio Bellizzomi wrote:

>On 13/02/2007, at 8.27, Jonathan S. Shapiro wrote:
>
>>Valerio:
>>
>>It is EXTREMELY difficult to do that in the installation tool. Please
>>explain how to record installation time on hardware that does not have
>>any time of day clock. Please explain how to make this record
>>*meaningful* when there is no counter that runs during system powerdown
>>and no way to re-synchronize the clock.
>
>But if you have no clock, you skip the whole step.
>If you have a clock, you grab it and write it to a disk location.
>
>>
>>Finally -- and I have asked this before -- please give a concrete
>>motivating example where knowing the time of installation actually helps
>>some real application.
>
>A protected historical record of image installation date helps in:
>1. diagnostics, and statistics for large numbers of machines.
>2. forensic analysis.

Such historical record is common in mainframe systems. I remember having
seen it on CDC NOS.

val