Discussions about cluster

What are the differences(pros/cons) between clustered and non-clustered indexes What are the differences(pros/cons) between clustered and non-clustered indexes? Started by Eric Labashosky on Thursday, September 18, 2008, 8 posts by 8 people.   Read the full thread at stackoverflow Discuss this with your friends on Facebook Answer Snippets (Read the full thread at stackoverflow): This means they are the fastest and you can only have one clustered index per table.... Clustered indexes are stored physically on the table. But there are plenty of other differences... You can only have one clustered index per table.

Non-Clustered Index on a Clustered Index column improves performance? In SQL Server 2005, the query analyzer has told me many times to create a non-clustered index on a primary ID column of a table which already has a clustered index. After following this recommendation, the query execution plan reports that the query should... Started by Kevin Berridge on Wednesday, September 03, 2008, 4 posts by 4 people.   Read the full thread at stackoverflow Discuss this with your friends on Facebook Answer Snippets (Read the full thread at stackoverflow): I'd guess it would.... So if the table already has a clustered index on a different column, then a non-clustered index is the best you can do. A clustered index will generally be faster, but you can only have 1 clustered index.

OpenCV's clustering function cvKMeans2() - what is a type of cluster center in array? I'm using function cvKMeans2() from OpenCV library for clustering. It has optional parametr: centers - The optional output array of the cluster centers The same parametr is also in function kmeans(). I want to know informations about clusters. But I haven... Started by Goffrey on Saturday, January 16, 2010, 4 posts by 4 people.   Read the full thread at stackoverflow Discuss this with your friends on Facebook Answer Snippets (Read the full thread at stackoverflow): A substantial upgrade to the old kmeans2 function, so I cannot be sure if the cluster centers.

What do Clustered and Non clustered index actually mean? I have a limited exposure to DB and have only used DB as an application programmer. I want to know about Clustered and Non clustered indexes. I googled and what I found was : A clustered index is a special type of index that reorders the way records in... Started by PK on Sunday, August 09, 2009, 5 posts by 5 people.   Read the full thread at stackoverflow Discuss this with your friends on Facebook Answer Snippets (Read the full thread at stackoverflow): For example.... This has the benefit of rapid scan / retrieval of records falling into some range of clustered index values. A clustered index means you are telling the database to store close values actually close to one another on the disk.

Cluster a vmware server between two cluster nodes Hello, we run a vmware server 1.0 on one node of our Windows failover cluster. As this is a failover cluster we want to be able to cluster the vmware server to another node. Is that possible without concern? The vmware disks can be put on a san to be ... Started by Uwe on Thursday, October 15, 2009, 4 posts by 4 people.   Read the full thread at serverfault Discuss this with your friends on Facebook Answer Snippets (Read the full thread at serverfault): VMware vSphere licenses and setup a vSphere Cluster so that you get the native HA which comes.

Will restarting the "Cluster Service" on the active cluster node cause any outages? I have a Windows Server 2003 Enterprise active/passive cluster running SQL Server 2005. The "Cluster Service" service won't start on my passive node, and I'm pretty sure it's what's described in this MS KB article . However, it prescribes restarting the... Started by rwmnau on Monday, September 14, 2009, 3 posts by 3 people.   Read the full thread at serverfault Discuss this with your friends on Facebook Answer Snippets (Read the full thread at serverfault): Best, Nick It will cause the SQL Instance to restart as the Cluster service is what controls.

SQL Server: Alter a clustered primary index to an non-clustered How do I alter a primary clustered index to become a non-clustured index. (Being a "secondary" table I want to use the clustured index for the foreign key column of the "header" table.) This doen't work for me (error seems reasonable :) DROP INDEX ClientUsers... Started by Niels Bosma on Monday, September 07, 2009, 3 posts by 3 people.   Read the full thread at stackoverflow Discuss this with your friends on Facebook Answer Snippets (Read the full thread at stackoverflow): I think you will have to: Drop the FK Drop the PK Drop the clustered index Recreate the PK Recreate the FK Recreate the clustered index on the FK column and then optionally create a secondry index on the PK column Have you tried dropping....

Clustered indexes versus non-clustered indexes? I am in charge of a smaller DB 300+ hundred megs 100'ish tables about 45 users hit it throughout the work day. Mostly reads, but a fair number of updates and inserts. I have been slowing learning the structure of the DB in order to get some performance... Started by Thoreau on Tuesday, July 07, 2009, 3 posts by 3 people.   Read the full thread at serverfault Discuss this with your friends on Facebook Answer Snippets (Read the full thread at serverfault): Normally.... They are also efficient for finding a specific row when the indexed value is unique . A clustered index determines the physical order of data in a table and is particularly efficient on columns that are often searched for ranges of values.

Clustering/load balancing for cluster unaware applications Forgive me if I use any of these terms incorrectly. I am wondering if there is any kind of software that would allow my two "join" two computers together such that a cluster unaware application could utilize their combined computing resources? By "cluster... Started by AaronLS on Thursday, August 06, 2009, 3 posts by 3 people.   Read the full thread at serverfault Discuss this with your friends on Facebook Answer Snippets (Read the full thread at serverfault): And the software generally has to be cluster aware, more so - it should be able to work in load balancing.

Xen cluster + iSCSI - Do I need a clustered filesystem Hi all - I am in the process of deploying a two-node CentOS+Xen with iSCSI for live migration. The idea is to create a 600GB iSCSI lun, mount it on one of the servers and partition it with LVM. Each VM will have its own logical volume in the lun. I will... Started by John on Wednesday, October 28, 2009, 3 posts by 3 people.   Read the full thread at serverfault Discuss this with your friends on Facebook Answer Snippets (Read the full thread at serverfault): This article on Xen Live migration with.... If you really want to avoid that complexity, you'll need to put each VM in it's own LUN . No, you don't need a clustering filesystem, but you will need clustered LVM to manage the shared LVM metadata.