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Update load_balancing.md

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Olivier Lambert 2015-11-11 19:28:52 +01:00
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load_balancing.md
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@ -4,10 +4,16 @@ Load balancing is feature coming for the end of 2015. The goal here is to **dist
Because Xen Orchestra is connected to [multiple pools](xo-server.md) and XenServer supports [live storage motion](https://www.citrix.com/content/dam/citrix/en_us/documents/products-solutions/storage-xenmotion-live-storage-migration-with-citrix-xenserver.pdf?accessmode=direct), we can imagine load balancing on a **whole XenServer infrastructure** (even between remote Data Centers). Because Xen Orchestra is connected to [multiple pools](xo-server.md) and XenServer supports [live storage motion](https://www.citrix.com/content/dam/citrix/en_us/documents/products-solutions/storage-xenmotion-live-storage-migration-with-citrix-xenserver.pdf?accessmode=direct), we can imagine load balancing on a **whole XenServer infrastructure** (even between remote Data Centers).
## Challenges ## First challenges
We are already capable to gather the metrics from all the hosts and VMs. But we need now to: We are already capable to gather the metrics from all the hosts and VMs. But we need now to:
* analyze the global load * analyze the global load
* detect bottlenecks * detect bottlenecks
* act accordingly * compare to user limits
* act accordingly
There is also a lof of unknown parameters:
* a live storage motion could be very long on remote DC if your bandwidth is low
* avoid to made worse than no load balancing (this is easier than you think!)