Thanks for sharing the scripts. The instruction is intuitive -- well organized and contains a very detailed description of the virtual disk part, very neat comments. As a long-time user of OS X and homebrew, I must say I become very interested in your solution -- running PostgreSQL natively on OS X, or macOS.

However, it makes me so confused that if it is your intention to run something heavy in a consumer-level Operating System. Dowmload for high sierra for mac. As far as I know, macOS has a newly-added but slowly-performed file system, named APFS. It might be good enough for single disk request but not good for the concurrent requests (like 4; ; ) -- I am not questioning/blaming about the old port design of either xhyve, OS X, or even hardware architecture SCSI, but that's where we can start now.

Anyway, there is a newly-adopted storage technology named NVME emulation which might help a lot in your case -- not only it handles with lots of disk requests at the same time (65535 queues and 65535 commands per queue), but also the architecture makes it possible to program the controller code in software, especially in user world. I don't know all details of NVMe but it works well in my experience -- both of consumer level and enterprise level -- it brings smooth disk latency in the virtual machine even under a very high bandwidth (50Gib transfer in nearly half a minute, can you believe that?). Do you know if it is possible to use NVMe emulation for faster disk access in xhyve and accelerate the PostgreSQL execution natively?

Bhyve For Os X Download

- SCSI: https://en.wikipedia.org/wiki/SCSI- NVME: https://en.wikipedia.org/wiki/NVM_Express

Os X 10.11.4

Bhyve (pronounced 'bee hive', formerly written as BHyVe) is a type-2 hypervisor initially written for FreeBSD. It can also be used on Mac OS X, as well as a number of illumos based distributions including SmartOS and OmniOS.

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