self-quote, "building systems is LEGO for adults"

TL;DR

I built a homelab server at home:

type	model
CPU	i5-3450 with PCI-E bifurcation hacking
MB	ASUS Z77
DRAM	4*8GB DDR3 1600
Storage	LSI 2308 SAS (OCP card) for: 2*Intel Optane M10 2*SSD 7*HDD (2~10TB, ~35TB in total)
Network	ConnectX®-3: 10 GbE (OCP) RTL8125: 2.5 GbE RTL8111: 1 GbE
Case	$2 case from trash cans
Rack	IKEA LACK + 4 homemade casters
OS	Ubuntu Server LTS

Most of them are EXTREMELY CHEAP products retired from DCs.

This server hosts a number of services, including:

• Network-Attached Storage through seafile, webdav, samba, nfs, iscsi, …
• jellyfin: media streaming with ffmpeg
• transmission: download station and PT (Reseed-Puppy, *IYUU)
• clash: network proxy
• home assistant: home automation with local control and privacy first
• pCDN: pay my bill

To ensure data reliability, less intrusion, and high flexibility. A bunch of open-sourced tools are used to manage NAS:

• ZFS: a feature-rich filesystem (CoW, *snapshot, RAID, cache…)
• MergerFS: combine different file systems to provide a global view
• BorgBackup: backup with compression and dedup
• Open-CAS: the easiest way to deploy cache for block devices
• *hd-idle (golang): the silver bullet to standby idle disks
• scrutiny: monitor disk status

In conclusion, it can provide a global view across multiple disks and different protection for different types of files (backup with dedup, erasure coding and snapshots).

*Items marked with stars contain codes that I contributed.