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On Jun 18, 2022, at 10:47 AM, Anthony D'Atri <anthony.datri@gmail.com> wrote:
Please do not CC the list.
It was my mistake, sorry about that.
15 Total servers and each server has a 12x18TB HDD (spinning disk) . We understand SSD/NvME would be best fit but it's way out of budget.
NVMe SSDs can be surprisingly competitive when you consider IOPS/$, density, and the cost of the HBA you don’t need.
Yes totally and I have only single slot to mount one NvME on motherboard. Let’s say I want to put single M.2 NvME then what size I would go for ?
Ceph recommends using a faster disk for wal/db if the data disk is slow and in my case I do have a slower disk for data.
Question: 1. Let's say if i want to put a NvME disk for wal/db then what size i should buy.
Since you specify 12xHDD, you’re thinking an add-in PCI card? Or do you have rear bays?
I have raid controller connected to all drivers in side box.
2. Do I need to partition wal/db for each OSD or just a single partition can share for all OSDs?
Each OSD.
What size of partition I should create for each 18TB OSD?
3. Can I put the OS on the same disk where the wal/db is going to sit ?
Bad idea.
I can understand but I have redundancy of 3 copy just in case of failure. And OS disk doesn’t hammer correct?
(This way i don't need to spend extra money for extra disk)
Boot drives are cheap.
I have no extra slot left that is why planning to share but I can explore more.
Any suggestions you have for this kind of storage would be much appreciated. _______________________________________________ ceph-users mailing list -- ceph-users@ceph.io To unsubscribe send an email to ceph-users-leave@ceph.io