Comments (5)
rposudnevskiy
commented on August 10, 2024
Hi,
I don't have an experience of using xenserver with infiniband but it seems there are some issues of using openvswitch with infiniband
https://discussions.citrix.com/topic/383014-xenserver-70-mellanox-connectx-3-nic-infiniband/?p=1964813
I'm not sure that it will help you but you can try to change openvswitch network backend (which is default) to Linux Bridge
https://www.citrix.com/blogs/2011/12/23/how-to-change-xenserver-network-backend-to-linux-bridge/
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nate-byrnes
commented on August 10, 2024
While I am not using IB with my cluster, I found that when I doubled the RAM on my dom-0's I saw much better performance with my guests vm's running on RBD. YMMV....
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nate-byrnes
commented on August 10, 2024
No, the physical server RAM was not changed. What I did was increase the
amount of RAM allocated to the ( https://wiki.xenproject.org/wiki/Dom0)
initial / management guest (where the rbd's are running ). I believe I
doubled the size.
…On November 17, 2017 6:22:58 AM bvanleenhoff ***@***.***> wrote:
@nate-byrnes - by "doubling the RAM for dom-0" you mean you provisioned
more RAM to the host machine that runs your xenserver?
I am as well experiencing very bad performance when using the ceph SR.
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commented on August 10, 2024
yeah I deleted my comment, because I found that :) i will try if this is making it better for me as well - thank you!
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starcraft66
commented on August 10, 2024
I am experiencing the same problem. When testing with the same Ceph cluster, disk I/O was much much much faster when running Proxmox.
For example, when installing debian onto a VM on RBD storage, dpkg is painfully slow because of all of the constant fsyncing it does. Despite this, doing the same on Proxmox results in a very fast installation.
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Related Issues (20)
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