HDS MULTIPATH DRIVER

A quick Recap If are using Hitachi storage and are entitled to use HDLM then you should probably use it to get optimal performance and multi-pathing between the host-target. You are commenting using your Facebook account. This is Revision 9. Queuing in vSphere Also consider the different queues involved in the IO path: Fill in your details below or click an icon to log in: You are commenting using your WordPress. Please consult the user guide but to summarise, the main benefits are:

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Please consult the user guide but to summarise, the main benefits are:. You can install a VIB and use this to optimise storage performance in Hitachi storage environments. The main benefit is a more optimal use of paths in a synchronous manner.

Leave a Reply Cancel reply Enter your comment here This is Revision 9. Notify me of follow-up comments by email. To check the status of your configuration SSH to the XenServer host and run the command multipath -ll the jds should be similar to the following output: This will reload the multipath configuration, type multipath -ll to show the new configuration.

I have seen extremely high IO driven from a single VM with very large block size.

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Notify me of new comments via email. The important thing to note is that this will be the case until a given amount of data is transferred. Please consult the user guide but to summarise, the main benefits are: Consider the job the hypervisor is doing for a second. To find out more, including how to control cookies, see here: Why would you use it: Leave a Reply Cancel reply Your email address will not be published.

As you can see both paths now have equal priority and the traffic will be balanced across the controllers.

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The default is IOPS. This site uses cookies. To check the status of your configuration SSH to the XenServer host and run the multipth multipath -ll the output should be similar to the following output:. Fill in your details below or click an icon to log in: MRU Although some arrays need to use Fixed.

You are commenting using your WordPress. The HDS AMS supports Active-Active multipathing, that is to say that both controllers send and receive data simultaneously rather than one live controller and one standby Active-StandbyCitrix XenServer out of the box however is setup for Active-Standby, reducing the throughput capability considerably. Think of the amount of moving parts here.

HDS AMS Active-Active Multipathing | rhoodsy

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The switching threshold can be either based on IOPS multipzth bytes. You can verify the results by either looking at the throughput stats on the AMS or by observing the traffic passing across the relevant ports on the FC switch.

When the threshold set for the path is reached the host will switch to the next path. It is co-ordinating IO from multiple VMs, living on different data stores, on multiple different hosts. You are commenting using your Twitter account.

If are using Hitachi storage and are entitled to use HDLM then you should probably use it to get optimal performance and multi-pathing between the host-target. About Steven something system architect with a passion for Cricket, food and associated beverages!

A quick Recap If are using Hitachi storage and are entitled to use HDLM then you should probably use it to get optimal performance and multi-pathing between the host-target. The truth about Converged Systems. Notify me of new posts by email.