If you have the chance maybe the best choice is try booting OS from network. I mean you don't need an extra hd for the OS. Actually I'm trying to make a squashfs image which is booted over LAN via iPXE. This is a very good example: https://croit.io/features/efficiency-diskless
El sáb., 12 ene. 2019 a las 7:15, Brian Topping (<brian.topping@xxxxxxxxx>) escribió:
Question about OSD sizes: I have two cluster nodes, each with 4x 800GiB SLC SSD using BlueStore. They boot from SATADOM so the OSDs are data-only, but the MLC SATADOM have terrible reliability and the SLC are way overpriced for this application.
Can I carve off 64GiB of from one of the four drives on a node without causing problems? If I understand the strategy properly, this will cause mild extra load on the other three drives as the weight goes down on the partitioned drive, but it probably won’t be a big deal.
Assuming the correct procedure is documented at http://docs.ceph.com/docs/mimic/rados/operations/add-or-rm-osds/, first removing the OSD as documented, zap it, carve off the partition of the freed drive, then adding the remaining space back in.
I’m a little nervous that BlueStore assumes it owns the partition table and will not be happy that a couple of primary partitions have been used. Will this be a problem?
Thanks, Brian
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Félix Barbeira.
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