- Community Home
- >
- Storage
- >
- Midrange and Enterprise Storage
- >
- StoreVirtual Storage
- >
- StoreVirtual Quroum
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
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
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
07-12-2018 10:40 AM
07-12-2018 10:40 AM
Hello all, I have a question about my StoreVirtual environment regarding the quroum and failover manager. My environment consists of two StoreVirtual SANs that has a VMware VM Failover Manager. So I have 2 managers and a failover manager. I have been going over the PDF document "HP StoreVirtual Storage User Guide" and on page 121 under "Managers and quorum" section it states this:
Managers use a voting algorithm to coordinate storage system behavior. In this voting algorithm,
a strict majority of managers (a quorum) must be running and communicating with each other for
the LeftHand OS software to function. An odd number of managers is recommended to ensure that
a majority is easily maintained. An even number of managers can get into a state where no majority
exists—half of the managers do not agree with the other half.
My question is, if the FOM crashes or a connection lose happens, will this cause issues and cause this split-brain to happen?
Solved! Go to Solution.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
07-13-2018 07:37 AM
07-13-2018 07:37 AM
SolutionAs long as the other two nodes stay online you will NOT run into a split brain solution. When the two nodes are online and talking to eachother, they would have two of the three quorum votes wich is >50% of the votes and that would tell them that they are the majority.
You will lose quorum if you have a two-node system with a FOM and run into an issue where the FOM goes offline AND one of the nodes goes offline or there is a communication failure between the two nodes. In that case, there would only be one voting member talking to itself and since one of three is less than 50%, it would assume it was the minority side of the cluster and stop serving IO to prevent it from causing data corruption since it has to assume that the other two nodes are potentially online somewhere serving data.
Make sure you don't have that FOM hosted on a LUN served by the cluster.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
07-13-2018 08:00 AM
07-13-2018 08:00 AM
Re: StoreVirtual Quroum
Thank you. This makes better sense now.