Search results

I'm confused. The fio command is reading directly from the disk, ignoring ZFS, and I'm getting the speeds I want. Once I do a read test from within a VM is when the speed drops.

Thanks. I'm still a little confused - those benchmarks are for write speeds. Does ZFS do a lot of writing when reading?

Also, from what I can tell, consumer-grade SSDs are particularly bad because of their high synchronous write times, whereas my main concern is the read speed of the system.

I understand that consumer grade SSDs aren't ideal, but at the moment it's all I can afford. Regardless, when I'm maxing out the IO in my VM, I don't see the IO on the SSD get anywhere near what it would be able to handle, especially based on the fio benchmarks.

The SSDs are consumer-grade Adata SU800s. The disk controller is a SAS2008 which is flashed to IT mode. I would think the hardware isn't the problem, based on the fio benchmarks posted above.

I have a Dell R710 server running Proxmox 5.4. It is installed on 2 2TB SATA HDDs, running in a ZFS mirror. I also installed 2 480GB SATA SSDs, which are in a separate ZFS mirrored pool. I'm having some performance issues with the SSDs, particularly when reading. When running fio on the disk...

What HBA would you recommend? If it's not too expensive, I can just buy one and try it out

I don't think that's the problem - I'm using an HBA and ECC memory.

Hi, I am having a disk problem with Proxmox. I'm running two SATA 2TB hard drives connected in a RAID 1 ZFS. I'm running Proxmox 5.4-3 on an R710. Sometimes, but not always, high disk I/O starts breaking things. For example, last night I was doing a disk import, which was causing my I/O delay to...