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Another one of the tuning parameters is this
parameter called MarkArchiveGaps. Now when
turned on what we are doing is we are actually
marking the gaps in the archive as you can see right here.
At this point we do not have any more data
because an archive that spans this
time-range here appears to be offline, so we
show this Arc Off-line digital state
in that, in that case. So, some people do not like to see that,
and they'd like to turn that feature off. So, that's why we have the tuning
parameters, and let's take a look at how we would make that change.
I am going to switch over to the PI System Management
Tools, and
let's, within here,
go into --
let's take a look at this. Yeah, let's take a look
at Before and After. We will take a look at the
archives and take one of them off line.
Let's see, this is -- this would give us a gap
from 1 to 2 PM today, so I am going to take
this offline. I will go ahead and unregister this archive.
Okay.
Incidentally, one of the more interesting things you can do with this
is to show markers or gaps occur.
So, in this case, by turning that on within
here -- there we go --
I can show where there is a gap.
So, in this case, we are showing that's, that's a gap.
That's basically a marker showing us that there's
a gap in the data. But, the real proof would be to go
out to a copy of PI ProcessBook. And, let me refresh
my screen. So you can see now that I have refreshed my screen,
there is definitely a gap. We see the gap appear,
and, if I were to draw a Trend Cursor there --
let me drop a Trend Cursor -- you see this Arc Off-line.
Well, as I said, you can change that behavior.
I will go into the System Management Tools.
Let's go into the Tuning Parameters.
And, I will go into the
tab called Archive. And let's say Mark Archive
Gaps. As you can see, the Current Value,
the Current Value right now, the Default Value I should say, is
one. And I am going to turn that off by setting the value
equal to zero. Now, to be honest, I have
forgotten whether this is going to update
immediately or not. Let's see what happens when I refresh
my screen here. No, I
believe this is not going to take effect until the next
time we stop and restart one of the subsystems.
And, since I believe that the --
this is not going to take effect, the change here is not going to take effect
until the archive process is stopped, let me go into
the General
Services, PI Services, and stop
and restart the archive subsystem. So I will
go ahead and stop and restart.
And, here I am. I fast-forwarded it a bit, and
I have stopped and restarted the Archive Subsystem, and now
if you take a look, those gaps are no longer being
shown. And that's not necessarily a good thing. It really
depends on your goal. Of course, the problem now is the
data is, in fact, missing but there's no indication that the data is
missing. So, that's something that you can set using
that -- it's the MarkArchiveGaps in
the Tuning Parameters. Now, there is a whole variety of other tuning
parameters that we may ask you to set if you are
involved in some troubleshooting with tech
support. So, that's, as I said, it's like
getting under the hood and tinkering with the operation of the system.
And, that's in the, the Tuning Parameters in
SMT.