Do you trust your users to follow your instructions?

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04-10-2015

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Do you trust your users to follow your instructions?

This happened a long time ago and some of the details may not be exact. Customer had obsolete hardware running an obsolete SCO OS and some type of database program with data scattered around the system. There were 2-1g SCSI drives, both split in half, with the 3 filesystems automatically loading on boot.

The non boot hard drive upchucked and went out to data recovery while I replaced the hard drive, partioned it, and created the filesystems awaiting Monday morning and left with instructions to not attempt a restore of the data if it came in.

When I got there on Monday the data had been restored. You can imagine that their data was totally corrupted. Some parts were good, some parts were bad, and they had no understanding of how it happened. Restoring to a system without the attached filesystem dropped the stuff to the assumed proper place on the root drive but only those files that would fit. And as the drive filled up less and less would fit.

The person who did the restore told me that the owner of the company had told him to restore it in spite of my instructions not to.

It ended up in the court system, my side to get reimbursed for some time and parts, his counter suit for $40,000 for the work to recover his data, later reduced to $25,000 so it would stay in small claims court. The second judge to hear it suggested that we kiss and make up since it was going to cost both of us more to proceed than we would win.

I understood what had happened, had insisted on backups that would have allowed full recovery, but wasn't interested in dealing with them any more.

edfair

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papi_ipc

PAPI_ipc(3)							       PAPI							       PAPI_ipc(3)

NAME

       PAPI_ipc -

       Simplified call to get instructions per cycle, real and processor time.

SYNOPSIS

Detailed Description
       C Interface:
	   #include <papi.h>
	   int PAPI_ipc( float *rtime, float *ptime, long long *ins, float *ipc );

       Parameters:
	   *rtime total realtime since the first call
	   *ptime total process time since the first call
	   *ins total instructions since the first call
	   *ipc incremental instructions per cycle since the last call

       Return values:
	   PAPI_EINVAL The counters were already started by something other than PAPI_ipc().
	   PAPI_ENOEVNT The floating point operations event does not exist.
	   PAPI_ENOMEM Insufficient memory to complete the operation.

       The first call to PAPI_ipc() will initialize the PAPI High Level interface, set up the counters to monitor PAPI_TOT_INS and PAPI_TOT_CYC
       events and start the counters.

       Subsequent calls will read the counters and return total real time, total process time, total instructions since the start of the
       measurement and the IPC rate since the latest call to PAPI_ipc().

       A call to PAPI_stop_counters() will stop the counters from running and then calls such as PAPI_start_counters() or other rate calls can
       safely be used.

       PAPI_ipc should return a ratio greater than 1.0, indicating instruction level parallelism within the chip. The larger this ratio the more
       effeciently the program is running.

       See Also:
	   PAPI_flips()

	   PAPI_flops()

	   PAPI_epc()

	   PAPI_stop_counters()

Author
       Generated automatically by Doxygen for PAPI from the source code.

Version 5.2.0.0 						  Tue Jun 17 2014						       PAPI_ipc(3)