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40 lines
3.9 KiB
Markdown
40 lines
3.9 KiB
Markdown
# Erasure code sizing guide
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## Toy Setups
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Capacity constrained environments, MinIO will work but not recommended for production.
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| servers | drives (per node) | stripe_size | parity chosen (default) | tolerance for reads (servers) | tolerance for writes (servers) |
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|--------:|------------------:|------------:|------------------------:|------------------------------:|-------------------------------:|
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| 1 | 1 | 1 | 0 | 0 | 0 |
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| 1 | 4 | 4 | 2 | 0 | 0 |
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| 4 | 1 | 4 | 2 | 2 | 1 |
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| 5 | 1 | 5 | 2 | 2 | 2 |
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| 6 | 1 | 6 | 3 | 3 | 2 |
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| 7 | 1 | 7 | 3 | 3 | 3 |
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## Minimum System Configuration for Production
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| servers | drives (per node) | stripe_size | parity chosen (default) | tolerance for reads (servers) | tolerance for writes (servers) |
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|--------:|------------------:|------------:|------------------------:|------------------------------:|-------------------------------:|
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| 4 | 2 | 8 | 4 | 2 | 1 |
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| 5 | 2 | 10 | 4 | 2 | 2 |
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| 6 | 2 | 12 | 4 | 2 | 2 |
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| 7 | 2 | 14 | 4 | 2 | 2 |
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| 8 | 1 | 8 | 4 | 4 | 3 |
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| 8 | 2 | 16 | 4 | 2 | 2 |
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| 9 | 2 | 9 | 4 | 4 | 4 |
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| 10 | 2 | 10 | 4 | 4 | 4 |
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| 11 | 2 | 11 | 4 | 4 | 4 |
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| 12 | 2 | 12 | 4 | 4 | 4 |
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| 13 | 2 | 13 | 4 | 4 | 4 |
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| 14 | 2 | 14 | 4 | 4 | 4 |
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| 15 | 2 | 15 | 4 | 4 | 4 |
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| 16 | 2 | 16 | 4 | 4 | 4 |
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If one or more disks are offline at the start of a PutObject or NewMultipartUpload operation the object will have additional data
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protection bits added automatically to provide the regular safety for these objects up to 50% of the number of disks.
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This will allow normal write operations to take place on systems that exceed the write tolerance.
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This means that in the examples above the system will always write 4 parity shards at the expense of slightly higher disk usage.
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