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VMware questions

Hello there,

I install your software our infrastructure and i really satisfied! Great work guys!

But i would like to ask some VMware specific things.

1.

The OSD-s are vmdk-s now (and the nodes of course, VMs), with HDD backend. On node installation, it detect that is a HDD-s. But we plan to migrate the PetaSAN VMs to SSD backend storage. My question is need to change something with configuration that Ceph/PetaSAN is recognise that the Disks is now SSDs? Or need to recreate the cluster?

2.

If i install open-vm-tools on nodes, it is not cause any probem with PetaSAN update? The update is normal "apt-get update" thing or recreate the full system disk?

That's all. Keep the good work, it is a great frontend!

It should not be an issue in most cases,  unless you have different hdd and ssd pools with different crush placement rules, else you should manually define the device class in crush to ssd as in

ceph osd crush rm-device-class osd.X osd.Y
ceph osd crush set-device-class ssd osd.X osd.Y

For performance tuning, to the the Configuration->Ceph Configuration in the ui, list the osd keys and change all  _hdd to match the _ssd

example change

bluestore_prefer_deferred_size_hdd = 32768  -> 0 to match ssd
bluestore_prefer_deferred_size_ssd = 0

2) The apt update is a normal apt update, not a full system disk install.

Thanks the answer!