Question about Stacking

Hello Everyone,
I have a quick question about stackwise plus technology. I would like to confirm that there is no redundancy at the ethernet switch port in terms of a physical problem. The reason I ask is that we are deploying stacked switches shortly to ensure high availability but curious to know whether anyone has seen issues with physical ports failing and not the chassis/PSUs. I understand that Etherchannels can be used but we have security cameras that cannot suffer any outages and would be connected to a single port on the stack. I'm guessing that my option is to monitor the Switch Ports statistics via SNMP and move the camera to another port if this ever happens.
Thanks in advance.
Cheers.
Evan

Disclaimer
The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.
Liability Disclaimer
In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.
Posting
Sure, ports can fail without the whole switch failing, but edge redundancy, such as using dual links (often configured as a bundled channel), between the host and two stack members addresses both switch port failure and stack member failure.
Unless your security cameras support dual links, your going to have a single point of failure at the edge port.
Next best options, as you've already noted, would be to have, on-line, "warm" spare ports that you can quickly repatch into. Ideally you have enough spare ports to allowing repatching in case a whole switch member fails.
(BTW, when you have spare ports, you don't have to set aside a whole stack member, sitting empty. For example, instead of having a dual stack with only one switch member populated, and the other not at all, split the populated ports across both stack members. That way, if a stack member fails, you don't lose all your hosts, only half. [With cameras, depending on their views, you might be able to overlap their coverage across multiple stack member.])

Similar Messages

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Hi There.
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Thanks in advance.

Getting on with this I can say I have made (some) progress.
The file looks as follows:
<mx:ColumnChart id="columnChart" type="stacked" dataProvider="{this.chartData}" width="507" height="100%" x="781" y="0">
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</mx:ColumnChart>
And the AS part:
private function createChartSeries(event:ResultEvent):void
     var temp:ArrayCollection = event.result as ArrayCollection;
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     var i:int;
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     for (i = 0; i < temp.length; i++)
          var series:ColumnSeries = new ColumnSeries();
          series.xField = "name";
          series.yField = temp[i].call_type.toString();
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          chartData.getItemAt(0)[temp[i].call_type.toString()] = temp[i].cost;
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     columnChart.invalidateSeriesStyles();
     columnChart.series = columnChart.series;
[Bindable]
public var chartData:ArrayCollection;
The event.result is as follows:
[{type:"t1", val1=10, val2=30}, {type:"t2", val1=20, val2=3}]
Now call the "createChartSeries" function the y-axis updates, there are 2 columns (well the grey bit down the bottom), but there are no names (the x-axis values) and the actual data columns do not show up.
Can anyone help me with this one?

Question about stacks

i've been with aperture since 1.0 so forgive my ignorance on this. I vaguely remember pre 2 that with stack you could do a search (either keyword, star, or whatever) and it would list all the photos that match that and the one in stacks you could open the stack and view the ones that weren't part of the search.
Let me try to explain my problem, perhaps that will help with the understanding. I have a fairly large library, a bit over 50,000 photos. there are hundreds of folders and projects and everything is very nice and neat. I have keywords and ratings on most of the images in my library, but I'm running into an issue regarding images in stacks that are not keyword or rated.
as an example, let's say I have a stack that has five photos in it, each rated one through five, with five being the stack pick. The stack is collapsed and life goes on only later I do a search for say all the 3 star or greater photos. In that search there are times when I want to open up the stack and see the rest of the photos to, in case say I wanted to upgrade the rating on something I'd missed.
Case i point, I have a smart album right now that's looking for photos with a certain keyword. The album has 'about' 300 photos in it. I say about, because roughly half of those are stacks. My problem is I want to add the same keyword to all the photos in the stacks but I can't view the other photos in the stacks because they don't have that keyword.
I would really like to figure this out. Anyone have any suggestions or hints. Maybe I'm just missing the button or not seeing some setting that I'm supposed to click

The notion of "stacks" only has meaning in the context of a project, IMO. It was originally part of the Ap design as a means to keep light-table work habits a part of Apple's digital workflow solution. I find it most useful during culling/selection, but not much beyond that point.
What you are attempting to do is very reasonable, but in my experience the only way to do this is to visit each respective project as you find candidates with your global rating search. It would be easier if Ap allowed a "reverse" lookup directly from a selected image....maybe in Ap3??
I know this is not an attractive option for you, so maybe others will have a better suggestion.
Good luck.
cheers,
david

Question about stacked objects using blend modes

Say there are three stacked objects. The two topmost have a blend mode.
In the area where all 3 intersect, the bottom object interacts with the transparency. Is there a way to limit how many levels the transparency affects? If you could limit it to two levels, then in the area where all three intersect the bottom object wouldn't participate in the blending. But in the areas where it overlaps only one of the topmost objects, it would participate.
I know this can be achieved by creating another object, or using the Pathfinder, I'd just like to know if there is a simpler method to use.

The attached PDF explains this better. Page 1 - the yellow and magenta are multiplied on top. But the cyan in not participating in the area where all 3 overlap. But in the areas with only 2 levels, it does participate, so there are the green and blue overlaps.
Since the cyan is negated from the one area, the result is red – yellow and magenta multiplying
The problem is, the only way to get this is to punch a hole in the cyan. So when you move the yellow and magenta around, the red doesn't follow (see page 2)
It would be nice if the blend modes included some sort of level limit. Default would be unlimited, but you could change it to 2 or whatever number you want. In this case if the level was 2, no hole in the cyan would be required.
As far as I know Adobe has not added to transparency capabilities for a long time. You have the 16 bend modes, and opacities. And knock out group and isolate blending, which are good features. But maybe it's time to expand on this and add more points of control.

Question about Stacked Chart ... is this possible?

This seems possible but I cannot get APEX to do it, wondering if someone has any ideas:
Say I have a table with multiple records with columns which contain a DATE, PERSON, TEAM ...
I am comparing number of records per team but trying to show in the STACK how each person contributed ...
Lets say there are 5 teams ...
I want to end up with a STACKED BAR chart which shows HOW MANY INSTANCES (count(*)) per TEAM ...
I want to end up with 5 BARs and each subdivided with the number of record instances which each PERSON in that team.
So at the end of the day, we can see how different people contributed to the overall total of a team and we can see how each team fared against one another ...
Thank you!
C

You would build a series per team and group on your date value with same aggregate.
Sample series using EMP and DEPT tables. seen here Chart Axis
Series 1
select null link, TRUNC(e.HIREDATE,q') label, count(*) acct
from "EMP" e natural join "DEPT" d
where d.dname = 'ACCOUNTING'
group by TRUNC(e.HIREDATE,q')
Series 2
select null link,TRUNC(e.HIREDATE,q') label, count(*) sales
from "EMP" e natural join "DEPT" d
where d.dname = 'SALES'
group by TRUNC(e.HIREDATE,q')
Series 3
select null link, TRUNC(e.HIREDATE,'q') label, count(*) research
from "EMP" e natural join "DEPT" d
where d.dname = 'RESEARCH'
group by TRUNC(e.HIREDATE,q')
Regards,
Brad

Question about stacked canvas disappearing

Hi,
I have a block which has some database items and non-database items. Since
there are many items in the block, I use a stacked canvas with horizontal bar
to display the less important items.
In the trigger of new-block-instance, show_view('stacked_canvas')
But I face one problem. When I click on a non-database item and then move
the cursor away from the item, the stacked canvas suddenly disappears.
Any idea ?
Many thanks in advance

Imagine each canvas as a piece of paper stacked on a desk. Each piece of paper possibly has a different size and the top left corner of each piece is possible oriented in a different spot. When you say show_view('stacked_canvas') its like reaching to the bottom of the pile and putting that canvas top. When you click on an item not on the stacked canvas that items canvas is placed on top. Your problem is that your non-database item content canvas is covering up the stacked canvas. I think...
Your issue could be solved by simply rearranging the canvas order by putting the stacked canvas last (I think) in the object navigator.
Raise on Entry could also be causing your issue. Go to the help. Click the search tab. Type "raise on entry". Read "Working with the Raise on Entry Canvas Property". There is a good explanation in there on how stacked canvases get covered up by content canvases and when.

Question about stacked sequence structure

Hi,
I made a numeric control outside a stacked sequence structure, and connect the control both to frame 1 and frame 2. In frame 2 there is a while loop structure. And now I start the labview program with the control A. Then, after frame 1 finished, frame 2 started, now I want to change the control to B and deliver B into frame 2. But the indicator in frame 2 shows that the control is still A. So I wonder how can I change the control and deliver it to the frame after the frame has started? Thank you!
NI Software : LabVIEW version 7.1
OS : Windows XP
Regards,
jackauden

Dataflow dictates what you are seeing. The control does not get read once the sequence starts. This is as expected.
Some possible solutions:
Just don't use stacked sequence! I don't and never feel limited by this choice.
Create local variable of the control and read from it inside frame 2.
Do you REALLY need a stacked sequence? Why???
LabVIEW Champion . Do more with less code and in less time .

Help:A question about stack

Hi, I met a weird problem,
try {
Stack stack=new Stack();
stack.push(a);
stack.push(b); //a,b are Objects
while(stack.peek() instanceOf Objects)
stack.pop;
System.out.println("Done")
}catch(Exception e) {
System.out.println("Error");
It could be worked, however, I always got the error message, which is so weird.
Can anyboy tell me the reason? Thanks a lot!
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Try the following program:
import java.util.Stack;
public class StackTry
     public static void main(String args[])
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               e.printStackTrace();
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}The problem is when u are doing stack.peek()
After all the elements in stack are poped, stack.peek() is done in the while loop which causes exception to occur. Hence the Error message.
Put a condition to check whether the stack is empty before peeking into the stack.
This should help, i guess.
Manish.

Few questions about 3750X stack switch

Dear,
I have just joined this helpful community. Since I am still a newbie, it is my hope to comprehend through our discussions. I would like to ask few questions about 3750X stack switch:
What kind of switches are considered as provisioned switch?
What is the purpose of using provision switch?
Which advantages does a provision switch provide? If we don't use provision feature, what would be happened?
Thank you very much. Look forward to reading your replies.

Disclaimer
The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.
Liability Disclaimer
In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.
Posting
Ivan's reference provides the details, but in real world where provisioned switches are nice include: if a switch member fails, that's switch member's configuration is still present and can be used on a like model replacement.
Also: for new stack members, being able to provision the new switch stack, before you add it to the stack, save a little time when you add the stack member to the stack. I.e. you can provision the stack member ahead of time, and then when you add the stack member, as soon as it joins the stack, it has the desired configuration.

Quick question about Quicktime media keys.......

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erwin2009 wrote:
Hi, as new to JMF, I would like to ask some generic questions about JMF from this communitySure/
Though including RTP stack, JMF is only compatible to old RTP draft, RFC1889. I know that Sun stopped developing/supporting JMF. What is the alternative solution for JAVA RTP implementation suitable for a serious SERVER project, not just a school-term project? Has anyone thought about that or may have already moved forward? Is that any commercial or more updated Java based RTP stack currently? I searched with google. Besides jrtp, a school project, and I could not find a nice one. Majority of RTPstack implementation is C/C++. There is one active project out there, Freedom for Media in Java, that has RTP capabilities. It's obviously not from Sun, but it's the only other RTP-capable project I am aware of, other than FOBS4Java, I believe is the name of it.
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deser: weblogic.xml.schema.binding.internal.builtin.XSDAnyCodec@18dfef8
ENTRY 2:
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xsd_type: ['http://xmlns.ozarkexpress.com/business/sell']:stns:echoDocument
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deser: weblogic.xml.schema.binding.internal.builtin.XSDAnyCodec@2a5330
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Question about blending

I have an unusual question about blending
Say you have two objects using a blend mode other than normal. For example, two boxes, one yellow, one magenta, both set to multiply.
Where they overlap is red.
Is there a way to keep this area red when the two boxes are placed on top of other objects? But still let the two boxes multiply over other objects, outside of the red overlap area. In other words, making only the red area opaque.
I know the result can be achieved by adding a box, or using the pathfinder, I was just wondering if there was a setting in the transparency pallet that would allow this.

Thanks for your help but I wasn't clear. My question doesn't concern blends, just transparency blend modes
Maybe the PDF will explain. Magenta and yellow boxes are on top, with multiply. Normally where they intersect with the cyan would be a muddy brown. I want what you see on page 1
So what I want is to leave the cyan out of the transparency interaction. The only way I know to do this is punch a hole in the cyan, or something like that. The problem with this is evident on page 2 - when you move around the magenta and yellow, the red stays put
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