A question about cluster of indicators

Hi,
Here is what I want to achieve:
Three indicators, use cluster to change the display
number
Here is what I have done:
1). Creat three indicators on the front panel
2). Put them in a cluster
3). Create a local variable and change its attribute to read
4). Unbundle the cluster local variable
5). Now I can't wire any vaule to the output element
of the unbundle function. (It seems all indicators become
data source).
How can I solve this problem?
Thanks a lot for your help!
Regards,
Tao
4

The issue is that a read local variable IS a data source. If you want to write to a control programatically (promise me you are only going to do this in your user interface code) you have to use a write local variable. In your case here, you need to bundle the three control values before writing the output of the bundler to the local variable.
Mike...
Certified Professional Instructor
Certified LabVIEW Architect
LabVIEW Champion
"... after all, He's not a tame lion..."
Be thinking ahead and mark your dance card for NI Week 2015 now: TS 6139 - Object Oriented First Steps

Similar Messages

A question about cluster

Hi all,
I have a question about the usage of cluster. I create a cluaster
which includes three indicators on the front panel, but I can't use
unbundle function on the diagram. If I change the indicator to control,
it works. I didn't find on the manual that the unbundle function only
accept cluster of control as input.
Thanks for your help!
Regards,
Tao

This is because of the way dataflow programming works. It probably didn't
explicitly mention.
Labview has data sources (controls, inputs) and data sinks (indicators,
outputs). Unbundling accepts cluster as input and outputs the individual
pieces of data. Similarly bundling accepts individual pieces of data as
input and ouputs a cluster. So logically your cluster must be a control
(input) for unbundling, and an indicator (output) for bundling.
If I'm misunderstanding the question or oversimplifying the problem email me
or post again.
-joey
"tsong" wrote in message news:b11154$qmq$[email protected]..
> Hi all,
>
> I have a question about the usage of cluster. I create a cluaster
> which includes three indicators on the front panel, but I can'
t use
> unbundle function on the diagram. If I change the indicator to control,
> it works. I didn't find on the manual that the unbundle function only
> accept cluster of control as input.
>
> Thanks for your help!
>
> Regards,
>
> Tao
>
>
>

Question about cluster node NodeWeight property

Hi,
I have a three nodes (A/B/C) windows 2008 r2 sp1 cluster testCluster, and installed KB2494036 for three nodes,suppose Node A is a active node.
I configured node C's NodeWeight property to 0, and node A and node B keep default (NodeWeight=1). I also added a shared disk Q for cluster quorum.
So i want to know if node C and Node B are down , is the windows cluster testCluster down as lost of quorum or keep up?
At the first i thought testCluster should keep up , because the cluster has 2 votes (node A and quorum), node B is down, node C doesn't join voting. But after testing, testCluster was down as lost of quorum.
So anybody konw the reason,thanks.

Hello mark.gao,
Let me see if I understand correctly your steps, so I can think that if you create your cluster with three nodes at the beginning your quorum model should be "Node Majority", then you have three votes one per each node.
Then was removed the vote for Node "C" and added a disk to be witness for cluster quorum, at this point we have two out of three votes from the original configuration on "Node Majority"
Question:
At some point you changed the quorum model to be "Node and Disk Majority"???
Maybe this is the issue, you are stuck on "Node Majority" and when "B" and "C" nodes are down we have only one vote from node "A" therefore there is no quorum to keep the service online.
On 2012 we have the awesome option to configure a Dynamic Quorum:
Dynamic quorum management
In Windows Server 2012, as an advanced quorum configuration option, you can choose to enable dynamic quorum management by cluster. When this option is enabled, the cluster dynamically manages
the vote assignment to nodes, based on the state of each node. Votes are automatically removed from nodes that leave active cluster membership, and a vote is automatically assigned when a node rejoins the cluster. By default, dynamic quorum management is enabled.
Note
With dynamic quorum management, the cluster quorum majority is determined by the set of nodes that are active members of the cluster at any time. This is an important distinction from the cluster quorum in Windows Server 2008 R2, where the quorum
majority is fixed, based on the initial cluster configuration.
With dynamic quorum management, it is also possible for a cluster to run on the last surviving cluster node. By dynamically adjusting the quorum majority requirement, the cluster can sustain
sequential node shutdowns to a single node.
The cluster-assigned dynamic vote of a node can be verified with the DynamicWeight common property of the cluster node by using the Get-ClusterNodeWindows
PowerShell cmdlet. A value of 0 indicates that the node does not have a quorum vote. A value of 1 indicates that the node has a quorum vote.
The vote assignment for all cluster nodes can be verified by using the Validate Cluster Quorum validation test.
Additional considerations
Dynamic quorum management does not allow the cluster to sustain a simultaneous failure of a majority of voting members. To continue running, the cluster must always have a quorum majority at the time of a node shutdown or failure.
If you have explicitly removed the vote of a node, the cluster cannot dynamically add or remove that vote.
Configure and Manage the Quorum in a Windows Server 2012 Failover Cluster
https://technet.microsoft.com/en-us/library/jj612870.aspx#BKMK_dynamic
Hope this info help you to reach your goal. :D
5ALU2 !

Question about Cluster/DSync/Load Balance

According to the admin doc of iplanet, primary server is
the "manager" for data sync, is there any impact on
load balance when the iAS run as primary or backup?
will the primary kxs get the request first and do dispatching?
Thanks.
Heng

First of all lets discuss load balancing....
The type of load balancing you are using will determine which process manages the load balancing. If you are using Response time (per server or per component response time) or round robin (regular or weighted) the web connector does the load balancing. If you are using User Defined (iAS based) load balancing then the kxs process becomes involved with load balancing of requests since the "Load Balancing System" is part of the kxs process.
Now for Dsync and how it impacts load balancing.
When a server is a sync primary or a sync backup role it is doing more work. For the sync primary the extra work is making sure the backup has the latest Dsync Data and processing requests from the other servers in the cluster about the Distributed data. All state/session information is updated/created/deleted on the sync primary, when this happens the sync primary immediately updates the sync backup(s) with this new information. As you can guess managing the Dsync information and making the updates to the sync backups causes extra processing on the sync primary, so this will impact the overall performance of the machine (whether it be in server load or response time of processing). All lookup of state/session information is done on the sync primary only so the more lookups/updates you have to more impact on the server.
The sync backup(s) also have the extra work of managing their copy of the Dsync Data which will impact server performance but to a lessor degree of the sync primary.
Ultimately the extra overhead involved does have an impact on loadbalancing due to the extra load on the sync primary and sync backups.
Hope that helps,
Chris Buzzetta

Question about cluster node majority voting

We've been having problems with a DB instance crashing regularly. This weekend when it crashed, it seems to have taken the node it was on with it, or this was a separate incident...
Right now I have 3 nodes in the cluster. 2 nodes are running 3 instances (2 on 1). The 3rd node is in a state where the OS is mostly unusable and the Cluster service will not start.
Event Log:
"The failover cluster database could not be unloaded. If restarting the cluster service does not fix the problem, please restart the machine."
Cluster Log from that machine:
00003768.000067a0::2014/01/06-03:28:05.393 INFO -----------------------------+ LOG BEGIN +-----------------------------
00003768.000067a0::2014/01/06-03:28:05.393 INFO [CS] Starting clussvc as a service
00003768.000067a0::2014/01/06-03:28:05.394 INFO [CS] cluster service logging level is 2
00003768.00004c30::2014/01/06-03:28:05.521 DBG   [NETFTAPI] received NsiInitialNotification
00003768.00004c30::2014/01/06-03:28:05.523 DBG   [NETFTAPI] received NsiInitialNotification
00003768.000031f4::2014/01/06-03:28:05.588 DBG   [NETFTAPI] received NsiAddInstance for 169.254.3.47
00003768.00004eb4::2014/01/06-03:28:05.590 ERR   [DM] Error while restoring (refreshing) the hive: STATUS_INVALID_PARAMETER(c000000d
00003768.00004eb4::2014/01/06-03:28:05.592 ERR   [DM] mscs::DmAgent::Start: STATUS_INVALID_PARAMETER(c000000d' because of 'Load(NOTHROW(), securityAttributes, discardError )'
00003768.00004eb4::2014/01/06-03:28:05.592 ERR   [DM] Node 3: failed to unload cluster hive, error 87.
00003768.00004eb4::2014/01/06-03:28:05.592 ERR   Hive unload failed (status = 87)
00003768.00004eb4::2014/01/06-03:28:05.592 ERR   FatalError is Calling Exit Process.
This is a 3 node cluster set to node majority, I don't have an available drive letter for a witness disk. Since the cluster service won't start, I'm not certain how the cluster is still running, but am thankful that it is.
A reboot might fix everything, but I'm very worried that if I reboot the server, and the cluster service still fails to start... it may prevent the entire cluster from starting and we won't be able to run the instances on the other 2 nodes.
Does the 3rd server still act as an odd-number server, even if the cluster service won't start? If I reboot and the cluster service still fails to start, will the cluster itself be able to be in an UP state and run the DB instances on the other nodes?
I already need to open a MS Support incident on the DB instance crashing, so I'd rather not have to open a 2nd one just to answer this hopefully simple question.
Thanks in advance!
Mark

I'll answer it here, since it matters fundamentally to SQL High Availability.
There are a couple of entities you are conflating here, leading to much confusion. There is a difference between the Cluster and the cluster service.
The cluster service will run on a node once the Failover Cluster Feature is installed on that node. The cluster service will run, even if a cluster is not created. It may generate errors and not participate in a Cluster if it cannot talk to the
other nodes, but it will not shut down.
The Cluster itself requires a quorum, that is a majority of votes, in order to operate. With three nodes, you should choose Node Majority quorum model, which sounds like what you have. Any two votes will count, so the third node being offline
does not matter. You can safely restart the cluster service on the failed nod, and even restart the node. Note that with the third node down, you have no redundancy. (Windows 2012 and 2012 R2 have dynamic quorum, which adjusts the quorum
count based on the last "settled" quorum vote, but that doesn't apply here).
I am concerned with your statement that you are out of drive letters. With three instances, you should have plenty of drive letters left. I suggest investigating Mount Points. You only need one drive letter per instance when using Mount
Points.
Geoff N. Hiten Principal Consultant Microsoft SQL Server MVP

A question about Job schdueling in cluster

hi all
I have a weblogic cluster and want to use the build-in commonj support to do some scheduling work.the pdf version document "Timer and Work Manager API (CommonJ) Programmer's Guide" has something like this on page 7,"The Timer Listener class must be pesent in the server system classpath" .does it mean that I should not put it in web-inf/classes?instead, I should jar it and put the jar somewhere inside wls_home/server/lib or ext ?
thanks a lot :-]

hi mchellap
here is another question about timers in the cluster,
1) I implemented a serializable timerlistener which I want to make it cluster aware
2) put the JNDI items "timer/MyTimer" in web.xml which is to commonj.timers.TimerManager
3) I created a datasource on cluster in console with the tables created in db
after the cluster is started,the job is to print out the "new Date()" in console every 40 second,and it worked very well
I am expecting something in the db table,but there is nothing,not even a exception ,anything wrong here?
thanks a lot

Question about DBCA generate script o create RAC database 2 node cluster

Question about creating two node RAC database 11g after installing and configuration 11g clusterware. I've used DBCA to generate script to create a rac database. I've set
environment variable ORACLE_SID=RAC and the creating script creates instance of RAC1 and RAC2. My understanding is that each node will represent a node, however there should only be one database with a name of 'RAC'. Please advise

You are getting your terminology mixed up.
You only have one database. Take a look, there are one set of datafiles on shared storage.
You have 2 instances which are accessing one database.
Database name is RAC. Instance names are RAC1, RAC2, etc, etc.
Also, if you look at the listener configuration and if your tnsnames is setup properly then connecting to RAC will connect you to either one of the instances wheras connecting to RAC1 will connect you to that instance.

A question about comments

Hi, all,
I have a question about the comments:
Program function comments should be included on the block diagram or Front panel, or both. Thanks.

Many good things have already been mentioned.
For the Front panel, there should be a clear distinction between toplevel VIs (or any subVIs where the user must interact with the front panel), and subVIs where the front panel is only of interest to the programmer. The needs here are quite different:
User Interface VIs
The front panel should be clear and easy to use. All "help" elements, tip strips, etc are geared towards the end user. The icon is irrelevant, because it is typically not even shown. Everything of interest to code maintenance should be on the diagram.
subVIs
Here, the front panel can contain a description of what the subVI does, who created it, company and copyright information, version information, limitations (e.g. input A must be >0), URLs or literature references to the algorithm, etc. (Have a look at any of the openG tools!). The "VI properties...documentation" section should be populated. The icon should be descriptive. All controls and indicators should have intuitive names (not just "Numeric 4", or "Array" )
Comments specific to certain areas of the code should be placed where they apply, especially if the code uses some exotic algorithm that would make the code hard to interpret.
Use a programming style that is self-documenting. (e.g. Don't unbundle the error cluster check for "equal zero" to switch a case statement. Wire the error cluster directly to the case so you'll get a red/green error case structure. Much more obvious!)
If these are proprietary VIs with password protected diagrams You should split the comments: Anything of interest to the non-privileged user goes on the front panel, anything else on the diagram.
In the end, it does not really matters where you place the comments as long as they are easy to find later and still make sense to somebody else 10 years from now. Message Edited by altenbach on 05-30-2005 01:13 PM
LabVIEW Champion . Do more with less code and in less time .

Question about Local Variables (Multiple answers welcomed!)

A couple of questions about Local Variables
1. Programmers always say: “Do not abuse of Local Variables”. I’d like to know, when and where Local variable are most efficiently used?
2. If I have to create a couple of local variables, is there anyway to “clone” them without going through the repetitive “create/local variables” mouse click each time? (When I try to copy and paste, it creates a new variables instead of the one that I am trying to reproduce)
3. Which is faster in execution: Updating a variable through a) writing to property node/value or b) through local variable
Everyone’s input is welcomed, so if this question is already answered, please
feel free to add additional comments/answers!

1. Use Local Variables in user interface code and no where else. The only exception is using a local variable of a cluster output to define the datatype for a bundle by name node.
2. You can drag copy them then right click to get to a menu of all the currently defined controls and indicators on the VI.
3. B. The problem with A is that it forces a thread switch to the user interface thread--which can take time if you aren't already in it, and it's a very convoluted process under the hood. NI's advice never update indicator values through a property node unless you absolutely, positively can't figure out some other way of doing it.
Mike...
Certified Professional Instructor
Certified LabVIEW Architect
LabVIEW Champion
"... after all, He's not a tame lion..."
Be thinking ahead and mark your dance card for NI Week 2015 now: TS 6139 - Object Oriented First Steps

Question about SAP client setting when create new connection in CR2008

Dear All,
I have a question about SAP client setting in Crystal Report 2008 when I try to create a new connection use SAP OpenSQL(SAP Table,Cluster,or Function).
I have a SAP IDES environment with 5 clients.
While I try to create a CR standard report use SAP OpenSQL, I entered 800 into Client field in u201CUser logon credentialsu201D. The connection can be created and I can get table list. After I built a report ,I can not get data from IDES client 800, but I can get data from client 000.
I am sure client 800 has data.I checked client 800 table with Tcord se16.
I also did other tests and felt confused a lot.
Even inexistent client, such as u201C00u201Dand u201C8000u201D can be used for creating connection.
I just want to know how can I get data from client 800.
Thanks for your kindly help!
Wayne

Dear Ingo,
Thanks for your reply!
I am not sure about your suggestion clearly. What's your mean all the authorizations to use CR?
Maybe I should clarify my operations.
I logon CR2008 as administrator and created two SAP connections with different client.
There is a table named "/BEV3/CHBALLG" be showed in these connections.
I checked clients "000" and "800" both have data in the table.
I can use client 000 connection create report and get right data, but the report base on client 800 connection could not get data.
If change to another table,such as "/SAPDMC/LSOFIL", I can get data both form these connections.
I found one thing is very weird. Client "00" and "8000" do not exist in my IDES environment, but I can use them for creating connection.
May I have your further suggestions?
Wayne

A few questions about the design of the scheme

Hello, all!
I want ask some question about design of the scheme.
1) If i store info about user (for example: /Smith/Bob - /phone values{+1 964 258 46 52}), i can request information by user (input parameters: /Smith/Bob - /phone, output:+1 964 258 46 52), but if i want get username by phone i must generate in store second string /19642584652 values{Smith Bob}. But I must duplicate any string - very prodigally. Are existing some work aruond?
2) if i want store some string with different minor key i put: ( /Smith/Bob - /phone, /Smith/Bob - /image, /Smith/Bob - /adress), but i already get duplicate date. Are existing any compressin major`s key? If yes - how it works
3) Are existing in Oracle NoSQL something like secondary index? If exist - how it works?
4) If i want get value by major key, im use get function(for example /Smith/Bob - /phone). How works searching algoritm? What mathematical basis of search?

>
So, some a few clarifying questions.
1) Request comes from the client(to cluster). It identifies the major key. And any rep group understand: contained in it is this line?
2) If contains - they use b-tree map to find the right key (as local index in Oracle DB).
Is it correct?
>
No. Please read the doc and the other forum threads. They explain this issue.
>
Can i use any different algoritm to search, different indexes(function based) for example (on step 2)?
>
No.
when the expected release of this option?Oracle employees cannot talk about future release dates and contents.
What algorithm used to compress the prefix of the key. And how it work`s.If you're interested in the implementation details you can read the BDB JE documentation on key prefixing and the BDB JE source code. See com.sleepycat.je.DatabaseConfig.setKeyPrefixing.
http://docs.oracle.com/cd/E17277_02/html/index.html
--mark

Question about RAC and ASM

Hi,
We are thinking about build RAC using ASM for OEM database. It'll have two nodes, oracle 10g and Hitachi san with solaris ( or linux ). I've few questions about RAC and ASM.
1) Do I need to have ASM instance running on each node ? ( most likely yes... but want to make sure )
2) can I share oracle_home between ASM instance and database instance ? what is the best choice ?
3) I'm planning to use shared disks for all files, all databases.... what are the pros/cons ?
4) what should be the installation procedure ? Meaning, first create ASM instance on each node, then install cluster software, build RAC databases...... can someone explain..
5) I believe RMAN is the only option for backup since I'm using ASM, correct ?
I'm a newbie to RAC and ASM..
Thanks,

user4866039 wrote:
1) Do I need to have ASM instance running on each node ? ( most likely yes... but want to make sure )yes.
2) can I share oracle_home between ASM instance and database instance ? what is the best choice ?in 10g you can, in 11gr2 you cannot. and it might be better to seperate them because it will give you more flexibility with patching.
3) I'm planning to use shared disks for all files, all databases.... what are the pros/cons ?if you share your oracle_home you won't be able to do rolling updates. so i recommend to keep oracle_homes local.
4) what should be the installation procedure ? Meaning, first create ASM instance on each node, then install cluster software, build RAC databases...... can someone explain..follow the install guide for your respective version. for 10g you'd install clusterware first, then asm and database is last.
5) I believe RMAN is the only option for backup since I'm using ASM, correct ?pretty much. you could stop your database and dump the raw devices or use asmcmd/asmftp but rman is definitely the best choice
Bjoern

Questions about your new HP Products? HP Expert Day: January 14th, 2015

Thank you for coming to Expert Day! The event has now concluded.
To find out about future events, please visit this page.
On behalf of the Experts, I would like to thank you for coming to the Forum to connect with us. We hope you will return to the boards to share your experiences, both good and bad.
We will be holding more of these Expert Days on different topics in the months to come. We hope to see you then!
If you still have questions to ask, feel free to post them on the Forum – we always have experts online to help you out.
So, what is HP Expert Day?
Expert Day is an online event when HP employees join our Support Forums to answer questions about your HP products. And it’s FREE.
Ok, how do I get started?
It’s easy. Come out to the HP Support Forums, post your question, and wait for a response! We’ll have experts online covering our Notebook boards, Desktop boards, Tablet boards, and Printer and all-in-one boards.
We’ll also be covering the commercial products on the HP Enterprise Business Community. We’ll have experts online covering select boards on the Printing and Digital Imaging and Desktops and Workstations categories.
What if I need more information?
For more information and a complete schedule of previous events, check out this post on the forums.
Is Expert Day an English-only event?
No. This time we’ll have experts and volunteers online across the globe, answering questions on the English, Simplified Chinese, and Korean forums. Here’s the information:
Enterprise Business Forum: January 14th 7:00am to 12:00pm and 6:00pm to 11:00pm Pacific Time
Korean Forum: January 15th 10am to 6pm Korea Time
Simplified Chinese Forum: January 15th 10am to 6pm China Time
Looking forward to seeing you on January 14th!
I am an HP employee.

My HP, purchased in June 2012, died on Saturday. I was working in recently installed Photoshop, walked away from my computer to answer the phone and when I came back the screen was blank. When I turned it on, I got a Windows Error Recovery message. The computer was locked and wouldn't let me move the arrow keys up or down and hitting f8 didn't do anything.
I'm not happy with HP. Any suggestions?

Have questions about your Creative Cloud or Subscription Membership?

You can find answers to several questions regarding membership to our subscription services. Please see Membership troubleshooting | Creative Cloud - http://helpx.adobe.com/x-productkb/policy-pricing/membership-subscription-troubleshooting- creative-cloud.html for additional information. You can find information on such topics as:
I need help completeing my new purchase or upgrade.
I want to change the credit card on my account.
I have a question about my membership price or statement charges.
I want to change my membership: upgrade, renew, or restart.
I want to cancel my membership.
How do I access my account information or change update notifications?

Branching to new discussion.
Christym16625842 you are welcome to utilize the process listed in Creative Cloud Help | Install, update, or uninstall apps to install and evaluate the applications included with a Creative Cloud Membership. The software is fully supported on recent Mac computers. You can find the system requirements for the Creative Cloud at System requirements | Creative Cloud.

Questions about using the Voice Memos app

I'm currently an Android user, but will be getting an iPhone 6 soon. My most used app is the voice memos app on my Android phone. I have a couple questions about the iPhone's built-in voice memos app.
-Am I able to transfer my voice memos from my Android phone to my iPhone, so my recordings from my Android app will show up in the iPhone's voice memos app?
-When exporting voice memos from the iPhone to computer, are recordings in MP3 format? If not, what format are they in?
-In your opinion, how is the recording quality of the voice memos app?

You cannot import your Android voice memos to your iPhone's voice memo app. You might be able to play the Android memos and have the iPhone pick up the audio and record it.
Here is the writeup about sending voice memos from the iPhone to your computer (from the iPhone User Guide):
App quality is excellent.

A question about cluster of indicators

Similar Messages

Maybe you are looking for