- Community Home
- >
- Servers and Operating Systems
- >
- Operating Systems
- >
- Operating System - HP-UX
- >
- Hot Standy w/ ServiceGuard
Categories
Company
Local Language
Forums
Discussions
Forums
- Data Protection and Retention
- Entry Storage Systems
- Legacy
- Midrange and Enterprise Storage
- Storage Networking
- HPE Nimble Storage
Discussions
Discussions
Discussions
Discussions
Forums
Forums
Discussions
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
- BladeSystem Infrastructure and Application Solutions
- Appliance Servers
- Alpha Servers
- BackOffice Products
- Internet Products
- HPE 9000 and HPE e3000 Servers
- Networking
- Netservers
- Secure OS Software for Linux
- Server Management (Insight Manager 7)
- Windows Server 2003
- Operating System - Tru64 Unix
- ProLiant Deployment and Provisioning
- Linux-Based Community / Regional
- Microsoft System Center Integration
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Community
Resources
Forums
Blogs
- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Printer Friendly Page
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО11-17-2000 12:35 PM
тАО11-17-2000 12:35 PM
The customer wants to have Oracle database among its software packages that MC/SG monitors. Is this how we want to use MC/SG? I had the pleasure of taking the MC/SG course, but I gathered that you would want to use ServiceGuard in conjunction with mirroring, where the nodes in the cluster (at least 3 nodes) have access to the same data disks (preferrably, an external disk device).
What the customer sounds like they want is a disaster/recovery setup (if one box fails the other can be used)... The question is, do you want to use ServiceGuard in this way and is this concidered to be "hot standby"? Please advise. Thanks.
A.J.B.
Solved! Go to Solution.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО11-17-2000 02:54 PM
тАО11-17-2000 02:54 PM
SolutionThere are two type of high available solutions:
*) SFT clusters ? system fault tolerant clusters, for eg:- Novel NetWare SFT
*) High available cluster , For Eg- HP MC/SG, Sun Cluster etc.
In SFT both the systems are mirrored, to be more precise, at any point of time memory of the cluster members would be in sync. So in case of the failure of the primary server, Not only the applications but also the last cursor position of the user screen would be intact., Typically user would never come to know of the failure.
But in High available clusters such as Sun or Hp clusters, in case of oracle like RDBS, up to the last committed transactions can be retrieved. I mean to say what ever was not written to the disk by the primary server would be lost in the event of a failure.
As far as MC/SG is concerned it does not have any protection / monitoring for disk failure. So you need to use either Mirror UX or RAID 0/1 for data redundancy. As you are thinking to make it as DR capable setup, consider to keep the different copies of the mirror geographically apart ( you may have to think of using fiber link).
HP offers standard MC/SG toolkit for Oracle, so the integration is going to be easy.
Finally MC/SG in conjunction with Disk mirroring ( either hardware of software ) you can keep your application up and running from the single point of failures such as
Network interface, Disk, application itself on a given box, or the CPU box itself.
Regards,
Pramod
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО11-17-2000 06:39 PM
тАО11-17-2000 06:39 PM
Re: Hot Standy w/ ServiceGuard
With MC/ServiceGuard, various configurations are possible. An "active/standby" configuration is one in which a standby server is configured to take over after the failure of another. In this configuration the backup node may be idle or it may be running a less important function.
An "active/active" configuration is one in which several nodes run critical apps while some serve as backups for others while still running their own applications.
An excellent overview of high-availability is an HP professional book "Clusters for High Availability: A Primer of HP-UX Solutions" by Peter S. Weygant (ISBN 0-13-494758-4).
You might also want to look at the "Designing Disaster Tolerant MC/ServiceGuard Clusters" manual:
http://docs.hp.com/hpux/onlinedocs/B7660-90001/B7660-90001.html
...JRF...
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО11-17-2000 07:05 PM
тАО11-17-2000 07:05 PM
Re: Hot Standy w/ ServiceGuard
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО11-18-2000 03:48 AM
тАО11-18-2000 03:48 AM
Re: Hot Standy w/ ServiceGuard
MC/SG is a product which allows you to build High Available Cluster configuration, by creating redundancy in Hardware. MC/SG monitors hardware and software resources and can handle so called SPOFs (single points of failures). A SG cluster contains minimum out of 2 nodes which should be configured in a way to take over each others applications. An application, like Oracle, is configured in a so called package. This package has to be configured to run on both nodes of the cluster.
A hot standby configuration means that one node of the cluster is in a idle state and only becomes active when for any reason the active cluster node fails. Hot standby, also means, that the standby node takes over control automaticaly and usualy no user intervention is needed to switch the package on this node. By the way, when speaking about MC/SG, we always talking about hot-standby.
It seems to me that the implementation your customer wants is not clear to you. So I will give you some questions you have to solve, before going on with this implementation:
1. Wants your customer a physical seperation of his datacenter?
If he wants this, you have to implement a so called Campus or Metro Cluster
2. Is the needed Hardware and Software already there, or do you have to deal with this things too.
3. Is there already in installed implementation of this Oracle DB, should you migrate this, or is this a new installation?
4. Does the customer already run MC/SG in his IT?
To get a more detailed information on MC/SG please visit:
http://docs.hp.com/hpux/ha/index.html
To understand HA concepts the whitepaper recommended in the above reply is a good start.