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more typos + clarification

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AtelierSnek 2022-10-31 19:49:17 +11:00
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@ -59,7 +59,7 @@ This would normally be something to consider carefully, but a good friend was ge
that came with the case.
### The PSU
We have a spare 850W 80+ Gold PSU lying around the house from an old PC, so we'll just repurpose that here.
We have a spare 750W Silverstone 80+ Platinum PSU lying around the house from an old PC, so we'll just repurpose that here.
### The Storage
It's probably strange to start with the storage, but we'll need to know how much storage we have to spec out
@ -123,15 +123,19 @@ prohibitively expensive to put it lightly.
Again, balancing cost and performance, 2 ✕ 500GB Seagate FireCuda 530s does the job well. Relatively high endurance,
good random IO performance, and not too expensive. Two of these sets us back 600 AUD.
#### Final Storage Configuration
Our final storage array consists of 12 ✕ 16 TB Seagate Exos Drives, and 2 ✕ 500GB Seagate FireCuda 530s.
With 8 data slices, 3 parity slices, and 1 hot spare slice, we should end up with approximately 110 TB of usable space.
### The CPU
We're going to make an executive decision and go with an AMD EPYC CPU, because we've always wanted to use one.
That said, we have a few options:
| Model | Generation | RRP (USD) | Cores (threads) | Clock (GHz) | L3 Cache (MB) | TDP (W) |
| ----- |:----------:|:---------:|:---------------:|:-----------:|:-------------:|:-------:|
| -------- |:----------:|:---------:|:---------------:|:-------------:|:-------------:|:-------:|
| 7272 | Rome | 625 | 12 (24) | 2.9 - 3.2 | 64 | 120 |
| 7302 | Rome | 978 | 16 (32) | 3.0 - 3.3 | 128 | 155 |
| 7352 | Rome | 1350 | 24 (48) | 2.3 - 3.2 | 128 | 155 |
| **7352** | **Rome** | **1350** | **24 (48)** | **2.3 - 3.2** | **128** | **155** |
| 7402 | Rome | 1783 | 24 (48) | 2.8 - 3.35 | 128 | 180 |
| 7F72 | Rome | 2450 | 24 (48) | 3.5 - 3.9 | 192 | 240 |
| 7452 | Rome | 2025 | 32 (64) | 2.35 - 3.35 | 128 | 155 |
@ -202,24 +206,23 @@ Since we're expecting mixed workloads (from friends), we'll follow the same guid
so we'll need at least 4 ✕ 48 = 192GB. With 8 slots on the mobo,
that means we'll have to use 32GB modules (or 64GB modules if we feel like going overboard).
Our motherboard comes with 8 RAM slots and the Rome Epyc CPUs support octo-channel RAM, so we'd get
Our motherboard comes with 8 RAM slots and the Rome EPYC CPUs support octo-channel RAM, so we'd get
the best performance from fully populating the RAM slots.
This however makes upgrading painful, so we're going to go with 4 ✕ 32GB @ 2400MHz for 128GB total for now, which sets
us back ~1000 AUD.
## The Damage
All up, we've spent:
| Part | Cost (AUD) | Running Total (AUD) |
|:--------------:|:---------------:|:-------------------:|
| 3U Server Case | FREE! | 0 |
| PSU | FREE! | 0 |
| CPU | 1500 | 1500 |
| RAM | 1000 | 2500 |
| Mass Storage | 12 ✕ 400 = 4800 | 7300 |
| ZIL/L2ARC SSDs | 2 ✕ 300 = 600 | 7900 |
| Motherboard | 1100 | 9000 |
| | | |
All up, we've settled on:
| Component | Selected Part | Cost (AUD) | Running Total (AUD) |
|:--------------:|:----------------------------------------------------:|:---------------:|:-------------------:|
| 3U Server Case | Who Even Knows? | FREE! | 0 |
| PSU | SilverStone 750W Platinum <br /> (SST-SX750-PT) | FREE! | 0 |
| CPU | AMD EPYC 7352 <br /> (24 core / 48 thread) | 1500 | 1500 |
| RAM | 4 ✕ 32GB@2400MHz <br /> (M393A4K40CB1-CRC) | 4 ✕ 250 = 1000 | 2500 |
| Mass Storage | 12 ✕ 16TB Seagate Exos <br /> (1ST16000NM001G) | 12 ✕ 400 = 4800 | 7300 |
| ZIL/L2ARC SSDs | 2 ✕ 500GB Seagate FireCuda 530 <br /> (ZP500GM3A013) | 2 ✕ 300 = 600 | 7900 |
| Motherboard | AsRock Rack ROMED8U-2T | 1100 | 9000 |
So just shy of 10,000 AUD. It's a hefty price tag, but worth it in our opinion.