Algorithm Used To Determine The Number Of Clusters
Mar 29, 2007
Hello.
What kind of criterion is used by MS clustering algorithm to determine the number of clusters when 0 is specified in the algorithm parameters?
The problem is that I find automatically defined cluster number somehow strange, especially when expactation maximization algorithm is used. I tried to "manually" calculate optimal cluster numbers in my models using bayesian information criterion and the one by Akaike and received more understandable results.
Thank you very much in advance.
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Oct 19, 2007
I have got a licensed copy of MS SQL Server 2005 Standard Edition. I am wondering how I can go about telling how many Processore Liscenses or Client Licenses I have with it. I have just the disk set and product key, no box. Any clues?
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Nov 24, 2006
Hi, all here,
Thank you very much for your kind attention.
Is there any good way to determine the number of clusters for the clustering models?
Really looking forward to hearing from you for your guidance.
Thanks a lot.
With best regards,
Yours sincerely,
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Sep 5, 2007
It's no secret that the number of pages in a rendered report varies depending on the format. I have no problem getting the total number of pages for reports rendered in image formats from the web service, but I can't figure out how to get the number of pages for reports rendered in HTML.
I've always been under the impression that the Report Manager that ships with SSRS uses the same web service (reportservice.asmx) and IT can get the number of HTML pages, so it has to be possible.
Does anyone know how to do it?
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Jul 20, 2005
DECLARE @varDate datetimeDECLARE @varMonthDate datetimeDECLARE @varYear datetimeDECLARE @varFOM varchar(10)DECLARE @NumDaysInMonth as intselect @varDate = '2/1/2004'select @varMonthDate = MONTH(@varDate)select @varYear = YEAR(@varDate)select @varFOM = CAST(CAST(@varMonthDate as int) as varchar) + '/1/' +CAST(CAST(@varYear as int) as varchar)select @NumDaysInMonth = DATEDIFF (day,@varFOM,DATEADD(mm,1,@varFOM))select @NumDaysInMonth as DaysInMonth
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Nov 30, 2007
I need to install sql server 2005 server and foglight on 2 node active/passive cluster.
do i need to install on both nodes ?
after install how can i find which is active node?
how can i findout the virtual name/IP ?
do i need to create DBMP's on both the nodes ?
how can i do cluster failover?
I am completely new SQL server, please let me know
laddu
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Nov 30, 2007
I need to install sql server 2005 server and foglight on 2 node active/passive cluster.
do i need to install on both nodes ?
after install how can i find which is active node?
how can i findout the virtual name/IP ?
do i need to create DBMP's on both the nodes ?
how can i do cluster failover?
I am completely new SQL server, please let me know
laddu
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Mar 17, 2004
Is anyone running SQL Server 2000 clusters on an IBM SAN (FAStT or ESS800)? Could you shed some light and provide links if any to IBM and/or Microsoft sites on this issues
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Nov 16, 2007
I am supporting 2 node cluster sql 2005 servers (Windows 2003 computers). Active and passive cluster.
Right now sql services are running under local system account , as per standard should be run on sql service account.
So please let me know how to change, with out impacting the application
Can i directly change sql services to service account on passive node ?
Please help me anyone on this task.
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Oct 17, 2007
As I understand it, if I have a 4 CPU box and I buy 4 processor licenses for SQL Server 2005 Standard, I can run 16 instances of SQL Server on that box.
Now given a cluster set up for active/passive I understand that if I license the same way I can have 16 instances on one of the nodes of the cluster. In the event of a failure, the instances can fail over to the "passive" node and the licenses move with them.
So heres the question. Given my two node cluster, each node has 4 CPUs, if I have some of the resources on node 1, and others on node 2, so instances are running on node 1 and node 2, am I on the hook for 8 processor licenses?
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Sep 20, 2006
Hi,
For our trainign data clustering models show the maximum accuracy.
We want to preset the results to our client. In order to do that we want to present what are the properties of each cluster.
For example for my predictable attribute if Cluster 9 is showing maximum population then I want to show what conditions of attributes make cluster 9 .
What is the way of doing this ?
Thanks,
Vkas
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Feb 2, 2006
Does anyone know of any issues with using Active/Passive or Active/Active clusters and log shipping. Will log shipping still work if a failover occurs?
Thanks
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May 26, 2006
Hi,
I have a MS Clustering model based on knowledge-area and I want to rename each cluster to the name of the knowledge area. What would be the DMX to rename the cluster?
I have been trying to do something like -
UPDATE [Knowledge Base].Content
SET Node_Caption = [Knowledge Base].[Field]
(Field is the column in the mining structure [Knowledge Base] with the values to be assigned to the Node_Caption)
But this does not work. The DMX query editor on parsing the query says that it reached the end of input.
Can someone help me out?
~ Sanchet
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Apr 4, 2007
I am about to move 8 SQL 2000 clusters instances residing on 2 seperate MCS clusters (4 instances each with 2 nodes each active/passive) to one single MCS cluster (2 nodes active/passive). The SQL Cluster VMs will have the same DNS names and IPs, however the MCS VM and nodes will have different names.
The planned method for moving the DBs is just to stop all SQL services copy the system and user MDF and LDF files and then restart SQL. From everything I have read this should be fine. However here are my concerns on a cluster platform:
Will the change in node names on the target cluster be a problem when moving the master DBs over from source SQL VMs? Are the cluster nodes listed somewhere in the Master DB?
A couple of the SQL instance VMs are invovled in transactional replication. If all of the SQL files are copied over and the target VM has the same DNS and IP name, will there be a problem with the transactional replication when SQL is restarted?
Thanks,
Chris
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May 17, 2001
Hi.
I am working on a project and we are starting to spec out our back end database systems. I wish to have multiple SQL Servers in a cluster PLUS failover running fiber against SANS storage arrays to partition the databases.
Has anyone seen any articles on this or know of any sources for support etc. ?
Our volume is sporatic but during enrollment phases (2 week long periods) we can have as many as 100,000 visitors registering (small datasets, large volume of logic) Thanks,
Craig Somberg csomberg@stageone.com
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Oct 13, 2004
Howdy,
We're interested in putting a SQL 2000 cluster together and want to hear from people who have run SQL Server clusters :
(1) Just how reliable are they in the real world?
(2) Which bits break ( i.e. hardware or OS or SQL Server )
(3) What configuration would you suggest and why?
Any help much appreciated
SG.
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Oct 22, 2014
We are looking to setup an AlwaysOn A/G between two SQL instances across two SQL clusters - one cluster has two nodes the other has three nodes.
Is this possible using WSFC? Does the A/G wizard just handle this?
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Feb 7, 2008
To all the SQL H/A experts, we were wondering if we could have 3 physical nodes and 2 active/passive clusters architecture setup on a SAN as seen in the image below? http://www.geocities.com/juanlieu/CP_Arch.JPGIn case you cannot see the diagram, it would looks something like this:
active/passive Cluster A ---> physical server A (Win2003/SQL2005) ---> HP EVA SAN ---> physical server B (Win2003/SQL2005) ---> HP EVA SANactive/passive Cluster B ---> physical server B (Win2003/SQL2005) ---> HP EVA SAN ---> physical server C (Win2003/SQL2005) ---> HP EVA SAN
In this setup, I understand that Server B cannot be called upon as the active server at the SAME time by both clusters. question: what would happens if it does, would Server B reject the last cluster that calls it?Appreciated in advance.
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Jan 7, 2007
Hello all and a happy new year!
I used Microsoft clustering for grouping my data. Even though i already cleaned the data and have no null values i get one cluster with missing values in every attribute. (i set CLUSTER_COUNT=3 and i'm using Scalable k-means algorithm)
Does "missing" mean that the algorithm cannot group that particular tuple in another group so it consider it as missing?
Thank you in advance.
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Dec 14, 2006
In a response posted Nov 21 (Clustering Dimension), Jamie wrote...
"The only option of using a table-based model as a dimension is to write out the cluster labels and simply make the cluster label as a dimension attribute. You could even append the cluster label to the source data (e.g. the customer table) and not have a seperate dimension, simply a browseable attribute on the dimension of interest"
Jamie, can you provide more information on how to do this? We'd like to have a series of clusters in an existing household dimension. That is, we need multiple occurences of cluster model results over time browsable in the source cube. I've looked at the data source, dimension, and cube created by the data mining model, but I don't see where the case ID (Household Key) and the cluster name could be extracted to update the existing dimension. We're using the cube for the data mining source.
This would also help to fix a recurring problem we have with keeping the linked cube and the source cube metadata in sync. If I make a change to the source cube, say by adding a new measure, the metadata for the linked cube gets out of sync. I've been deleting the data mining dimension, cube, and dsv and them adding them back in using the data mining menu in the model.
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Apr 11, 2014
We have 2 SQL 2012 servers. Our application has 2 databases. We are creating an AlwaysOn cluster. Is it good to create 2 AlwaysOn clusters to have 1 database primary on one of the servers and the other database primary on the other server?
I have been asked if it is possible to have one database running on one server and the other database on the other server. Is this possible without creating 2 separate AlwaysOn clusters?
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Nov 21, 2007
I have been reading through many postings here, through the MS SQL Server Unleashed book by SAMS, the MS SQL Tech article "Failover clustering for Microsoft SQL Server 2005 and SQL Server 2005 Analysis Services" for installing a brand new SQL 2005 2 node cluster.
So far I have not found the definitive answer that I am looking for and that is, what rights does the SQL service account need to work properly? One article states that it needs both Domain Admin permissions and local admin permissions (and this is a domain account by the way) and then another article states that it only needs domain users group permissions and the least amount of privledges possible.
Can anyone please tell me what is correct for installation and running the server? The more I read about this the more confused I get.
Please be patient as I am brand new to SQL.
Thank you very much!
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Feb 2, 2008
Hello,
I wanted to instal sql server 2005 on our sql 2000 failover cluster.
The first thing i did was deinstal sql 2000.
The installation hangs on the dialog screen configuring components and does not present een error.
If i install the cluster with one node there's no problem.
But if i want to add the second node the installion hangs.
When i go to the second node and stop the scheduled task the installations stops.
Do you have any suggestion
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Sep 22, 2015
I have an active passive cluster on my primary Data center in NY and have a DR Active / passive SQL Cluster in TX. These are two separate clusters in the same domain using the same SQL server credentials.Both clusters host an active / passive SQL instance. Lets call it SQLNY(Primary) and SQLTX (DR). I want to enable always On Availability group within the two SQL Instances SQLNY and SQLTX. The listener will be SQLAG which will be used by the Application to connect to the SQL instance. Is there a practical way to implement this? This will not only give me instant fail over within the NY (Primary) but also give me the flexibility to fail over to TX. I am using SQL 2014 Enterprise Edition on both clusters.
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Jul 27, 2007
Hello Everyone,
Does SQL Server 2005 has a counterpart to Oracle 10G's Real Application Clusters (RAC)?
http://www.oracle.com/technology/products/database/clustering/index.html
Regards,
Joseph
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May 22, 2002
Does any have a algorithm that can divide A into B without using the divide
sign (/) or the multiplication sign ( * ).
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Nov 24, 2006
I am new to DM and I am not sure which algorithm would be best to use.
I am trying to build a custom comparitor application that companies can use to compare themselves against other companies based on certain pieces of information. I need to group a company with 11 other companies based on 6 attributes. I need the ability to apply weightings to each of the 6 attributes and have those taken into consideration when determining which 10 other companies each company is grouped with. Each group must contain 11 members, the company for the user logged in and 10 other companies that it will be compared against.
At first I thought that clustering would be a good fit for this but I can not see a way to mandate that each cluster contain exactly 11 members, I cannot see a way to weight the inputs, and I think each company can only be in one cluster at a time which do not meet my requirements.
Any help will be greatly appreciated!
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Jun 8, 2006
Well, i have read in claude seidman book about data mining that some algorithm inside in microsoft decision tree are CART, CHAID and C45 algorithm. could anyone explain to me about the tree algorithm and please explain to me how the tree algorithm used together in one case?
thank you so much
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Jul 27, 2007
Hello Everyone,
Does SQL Server 2005 has a counterpart to Oracle 10G's Real Application Clusters (RAC)?
http://www.oracle.com/technology/products/database/clustering/index.html
Regards,
Joseph
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Dec 11, 2006
Use this to check if Luhn has valid check digitCREATE FUNCTIONdbo.fnIsLuhnValid
(
@Luhn VARCHAR(8000)
)
RETURNS BIT
AS
BEGIN
IF @Luhn LIKE '%[^0-9]%'
RETURN 0
DECLARE@Index SMALLINT,
@Multiplier TINYINT,
@Sum INT,
@Plus TINYINT
SELECT@Index = LEN(@Luhn),
@Multiplier = 1,
@Sum = 0
WHILE @Index >= 1
SELECT@Plus = @Multiplier * CAST(SUBSTRING(@Luhn, @Index, 1) AS TINYINT),
@Multiplier = 3 - @Multiplier,
@Sum = @Sum + @Plus / 10 + @Plus % 10,
@Index = @Index - 1
RETURN CASE WHEN @Sum % 10 = 0 THEN 1 ELSE 0 END
END
Peter Larsson
Helsingborg, Sweden
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Jul 23, 2005
Hello,Do you know if the algorithm for the BINARY_CHECKSUM function in documentedsomewhere?I would like to use it to avoid returning some string fields from theserver.By returning only the checksum I could lookup the string in a hashtable andI think this could make the code more efficient on slow connections.Thanks in advanced and kind regards,Orly Junior
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Dec 7, 2007
What kind of algorithm does the MAX command uses? I have a table that I need to get the last value of the Transaction ID and increment it by 1, so I can use it as the next TransID everytime I insert a new record into the table. I use the MAX command to obtain the last TransID in the table in this process. However, someone suggested that there is a problem with this, since if there are multiple users trying to insert a record into the same table, and processing is slow, they might essentially come up with the same next TransID. He came up with the idea of having a separate table that contains only the TransID and using this table to determine the next TransID. Will this really make a difference as far as processing speed is concerned or using a MAX command on the same table to come up with the next TransID enough? Do you have a better suggestion?
Thanks
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Sep 15, 2006
Hi,
Would anyone be able to provide a reference paper on the neural net algorithm implemented in SQL Server 2005 to better understand how it works?
Thanxs for any info.
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