BTRFS

[LnxBil]

Nowadays dell gives option to separate operating system on NVMe with raid they call it boss

Makes no sense for PVE, you don't need the speed for the OS. Once booted, there is not a lot of I/O requirements

I want to for client to buy c/m and use it as they want

Why on earth would you not want to run on RAID1 in such a setup for a customer.

As I said, I'd go with a multi-tier-setup with ZFS as described in #4.

 

[Maher Khalil]

No problem with RAID 1 BUT I want to avoid CPU and RAM high usage and save these resources for high density virtualization.
as I understand from you is that I use NVMe and SSD for metadata and mount storage in HDD but how can I arrange like that?

 

[LnxBil]

No problem with RAID 1 BUT I want to avoid CPU and RAM high usage and save these resources for high density virtualization.

Why should RAID1 have more CPU or RAM usage?

as I understand from you is that I use NVMe and SSD for metadata and mount storage in HDD but how can I arrange like that?

As I said: based on your hardware, I'd build two pools: SSD and HDD with metadata and SLOG in mirrored NVMe partitions. Hopefully, the NVMe is very fast and everything is "real" enterprise hardware.

 

[Maher Khalil]

Why should RAID1 have more CPU or RAM usage?


As I said: based on your hardware, I'd build two pools: SSD and HDD with metadata and SLOG in mirrored NVMe partitions. Hopefully, the NVMe is very fast and everything is "real" enterprise hardware.

Not raid 1 which will consum ram and cpu but I am afraid zfs may do
Please note I buy hardware from dell themselves

 

[djsami]

Besides the RAID 0 stupidity (seriously!), why use RAID and then BRTFS? BTRFS has built-in raid functionality (mirroring, striping and more).

I said BTRFS itself already has raid 0

https://pve.proxmox.com/wiki/BTRFS

• RAID0, RAID1 and RAID10

When you install using the Proxmox VE installer, you can choose BTRFS for the root file system. You need to select the RAID type at installation time:

RAID0	Also called “striping”. The capacity of such volume is the sum of the capacities of all disks. But RAID0 does not add any redundancy, so the failure of a single drive makes the volume unusable.
RAID1	Also called “mirroring”. Data is written identically to all disks. This mode requires at least 2 disks with the same size. The resulting capacity is that of a single disk.
RAID10	A combination of RAID0 and RAID1. Requires at least 4 disks.

ssd used raid 10 and now it's dead in 1 month because raid kills ssd.




and the result raid 10 Do not recommend do not use.

we use professional devices, our experience is very advanced

 

[Maher Khalil]

so, you recommend BTRFS with RAI0 based on your previous experience, right?

 

[djsami]

so, you recommend BTRFS with RAI0 based on your previous experience, right?

definitely

OS speed affects vmms speed

some people install and run proxmox on the usp this is stupid.

all config all processes OS does.

 

[Maher Khalil]

In this case I can mix all sizes and types of disks right?
I mean it will not matter HDD, SSD, I will select raid 0 btrfs while installations,right?

 

[LnxBil]

ssd used raid 10 and now it's dead in 1 month because raid kills ssd.

Sorry, RAID does not kill SSDs. Writing in general kills cheap SSDs like the ones in your image. Please use only and exclusively enterprise SSDs, do not use consumer or prosumer SSDs, they wear too quickly. RAID10 does not write so much, just twice (as RAID1 implies), RAID5 will write more, depending on the number of disks in your RAID5 disk set.

 

[LnxBil]

I will select raid 0 btrfs while installations,right?

If you don't care about your data, sure ... hopefully, you're not in the EU and are not hosting in a GDPR compliant environment.

 

[Maher Khalil]

If you don't care about your data, sure ... hopefully, you're not in the EU and are not hosting in a GDPR compliant environment.

what is GDPR compliant