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Revised cost calculator (#181)
* Changed default cloud costs from AWS to third-party bare metal * Default is one relay instead of two * Disk compression reduced to 50% * Toggle for amortization * Added selection of default costs * Redeployed * Updated logbook
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‎Logbook.md‎

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# Leios logbook
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## 2025-02-06
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### Enhancements to online cost calculator
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In response to queries and suggestions, the [online Leios cost calculator]() has been enhanced:
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- Users can select costs for either hyperscale providers (like AWS, Azure, and GCP) or discount providers (Hetzner, OVH Cloud, etc.).
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- Costs default to that of a discount provider.
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- Users can optionally amortize ledger storage costs perpetually vs compute a first-month snapshot of storage costs.
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- Deployments default to a single relay instead of two.
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- The disk compression default was reduced to a conservative 50%.
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## 2025-01-31
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## Formal Methods
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### Formal Methods
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- Finalizing executable specifications for Simplified and Short Leios
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- Short Leios spec extracted to Haskell for conformance testing

‎cost-dashboard/index.html‎

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@@ -214,29 +214,33 @@ <h2>v0.3, <small><a href="https://drive.google.com/file/d/1pH1GYRInevlKcrkpFRJYI
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<td>GB</td>
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</tr>
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<tr>
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<th rowspan="5">Costs</th>
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<th rowspan="5">Costs<br/>
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<br/><input type="button" value="hyperscale provider" onclick="Controller.hyperscaleCosts()"/> <span title="Set costs to values typical of the largest cloud providers">ⓘ</span>
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<br/><input type="button" value="discount provider" onclick="Controller.discountCosts()"/> <span title="Set costs to values typical of a discount cloud provider">ⓘ</span>
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</th>
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<th colspan="2">vCPU <span title="Monthly cost of a virtual CPU.">ⓘ</span></th>
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<td><input id="uiVcpu" type="number" min="0" max="100" value="20" step="0.01"/></td>
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<td>USD/vCPU/month</td>
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</tr>
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<tr>
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<th colspan="2">Storage <span title="Monthly cost of cloud disk attached to a virtual machine.">ⓘ</span></th>
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<td><input id="uiStorage" type="number" min="0" max="1" value="0.12" step="0.01"/></td>
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<td><input id="uiStorage" type="number" min="0" max="1" value="0.10" step="0.01"/></td>
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<td>USD/GB/month</td>
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</tr>
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<tr>
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<th colspan="2">IOPS <span title="Monthly cost of cloud input/output operation capacity.">ⓘ</span></th>
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<td><input id="uiIops" type="number" min="0" max="0.5" value="0.05" step="0.001"/></td>
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<td><input id="uiIops" type="number" min="0" max="0.5" value="0.00" step="0.001"/></td>
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<td>USD/(IO/s)/month</td>
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</tr>
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<tr>
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<th colspan="2">Network egress <span title="Monthly cost of cloud network egress.">ⓘ</span></th>
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<td><input id="uiEgress" type="number" min="0" max="1" value="0.10" step="0.01"/></td>
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<td><input id="uiEgress" type="number" min="0" max="1" value="0.00" step="0.01"/></td>
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<td>USD/GB</td>
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</tr>
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<tr>
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<th colspan="2">Discount rate <span title="Annual rate at which cloud-computing costs decrease.">ⓘ</span></th>
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<td><input id="uiDiscount" type="number" min="0" max="50" value="15" step="0.1"/></td>
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<th colspan="1">Discount rate <span title="Annual rate at which cloud-computing costs decrease.">ⓘ</span></th>
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<th>Amortize? <span title="Whether to compute perpetual storage cost.">ⓘ</span><input id="uiAmortize" type="checkbox"/></th>
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<td><input id="uiDiscount" type="number" min="0" max="50" value="15" step="0.1" disabled="true"/></td>
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<td>%/year</td>
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</tr>
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<tr>
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</tr>
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<tr>
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<th colspan="2">Relays <span title="Number of relay nodes operated by the stake pool.">ⓘ</span></th>
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<td><input id="uiRelays" type="number" min="0" max="10" value="2" step="1"/></td>
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<td><input id="uiRelays" type="number" min="0" max="10" value="1" step="1"/></td>
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<td>nodes</td>
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</tr>
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<tr>
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</tr>
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<tr>
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<th colspan="2">Storage compression <span title="Percentage by which each node's disk storage space is reduced by using data compression or a compressed file system.">ⓘ</span></th>
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<td><input id="uiCompression" type="number" min="0" max="100" value="75" step="0.1"/></td>
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<td><input id="uiCompression" type="number" min="0" max="100" value="50" step="0.1"/></td>
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<td>%</td>
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</tr>
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<td>USD/month</td>
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</tr>
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<tr>
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<th>Disk (amortized) <span title="The stake pool's monthly cost of perpetually storing the month's transactions on disk.">ⓘ</span></th>
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<th>Disk <span id="uiAmortized">(amortized)</span> <span title="The stake pool's monthly cost of perpetually storing the month's transactions on disk.">ⓘ</span></th>
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<td id="uiCostStorage">?</td>
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<td>USD/month</td>
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</tr>

‎cost-dashboard/src/controller.js‎

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const costVcpu = vcpu * getFloat(uiVcpu)
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uiCostVcpu.innerText = costVcpu.toFixed(2)
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uiAmortized.style.textDecoration = uiAmortize.checked ? "none" : "line-through"
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const discount = getFloat(uiDiscount) / 100 / 12 // 1/month
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const perpetual = (1 + discount) / discount // 1
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const perpetual = uiAmortize.checked ? (1 + discount) / discount : 1 // 1
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const compression = 1 - getFloat(uiCompression) / 100 // 1
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const storage = nodes * compression * (getFloat(uiRbLedger) + resources.disk / gigabyte * month) // GB/month
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uiTotalStorage.innerText = storage.toFixed(2)
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}
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export async function hyperscaleCosts() {
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uiVcpu.value = "20"
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uiStorage.value = "0.12"
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uiIops.value = "0.05"
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uiEgress.value = "0.09"
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calculate()
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}
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export async function discountCosts() {
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uiVcpu.value = "20"
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uiStorage.value = "0.10"
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uiIops.value = "0.00"
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uiEgress.value = "0.00"
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calculate()
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}
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export async function initialize() {
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[
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uiAda
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, uiAmortize
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, uiCertBuild
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, uiCertIo
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, uiCertRate

‎cost-dashboard/view.css‎

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text-align: left;
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}
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input {
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#uiAmortized {
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text-decoration: line-through;
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}
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input[type="text"] {
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width: 75px;
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text-align: right;
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font-family: monospace;
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}
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input[type="number"] {
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width: 75px;
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text-align: right;
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font-family: monospace;
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}
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input[type="button"] {
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width: 75%;
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}
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table {
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width: fit-content;
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border-collapse: collapse;

‎site/static/cost-estimator/controller.js‎

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‎site/static/cost-estimator/index.html‎

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<td>GB</td>
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</tr>
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<tr>
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<th rowspan="5">Costs</th>
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<th rowspan="5">Costs<br/>
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<br/><input type="button" value="hyperscale provider" onclick="Controller.hyperscaleCosts()"/> <span title="Set costs to values typical of the largest cloud providers">ⓘ</span>
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<br/><input type="button" value="discount provider" onclick="Controller.discountCosts()"/> <span title="Set costs to values typical of a discount cloud provider">ⓘ</span>
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</th>
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<th colspan="2">vCPU <span title="Monthly cost of a virtual CPU.">ⓘ</span></th>
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<td><input id="uiVcpu" type="number" min="0" max="100" value="20" step="0.01"/></td>
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<td>USD/vCPU/month</td>
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</tr>
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<th colspan="2">Storage <span title="Monthly cost of cloud disk attached to a virtual machine.">ⓘ</span></th>
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<td><input id="uiStorage" type="number" min="0" max="1" value="0.12" step="0.01"/></td>
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<td><input id="uiStorage" type="number" min="0" max="1" value="0.10" step="0.01"/></td>
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<td>USD/GB/month</td>
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</tr>
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<tr>
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<th colspan="2">IOPS <span title="Monthly cost of cloud input/output operation capacity.">ⓘ</span></th>
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<td><input id="uiIops" type="number" min="0" max="0.5" value="0.05" step="0.001"/></td>
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<td><input id="uiIops" type="number" min="0" max="0.5" value="0.00" step="0.001"/></td>
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<td>USD/(IO/s)/month</td>
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</tr>
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<tr>
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<th colspan="2">Network egress <span title="Monthly cost of cloud network egress.">ⓘ</span></th>
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<td><input id="uiEgress" type="number" min="0" max="1" value="0.10" step="0.01"/></td>
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<td><input id="uiEgress" type="number" min="0" max="1" value="0.00" step="0.01"/></td>
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<td>USD/GB</td>
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</tr>
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<tr>
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<th colspan="2">Discount rate <span title="Annual rate at which cloud-computing costs decrease.">ⓘ</span></th>
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<td><input id="uiDiscount" type="number" min="0" max="50" value="15" step="0.1"/></td>
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<th colspan="1">Discount rate <span title="Annual rate at which cloud-computing costs decrease.">ⓘ</span></th>
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<th>Amortize? <span title="Whether to compute perpetual storage cost.">ⓘ</span><input id="uiAmortize" type="checkbox"/></th>
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<td><input id="uiDiscount" type="number" min="0" max="50" value="15" step="0.1" disabled="true"/></td>
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<td>%/year</td>
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</tr>
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</tr>
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<tr>
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<th colspan="2">Relays <span title="Number of relay nodes operated by the stake pool.">ⓘ</span></th>
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<td><input id="uiRelays" type="number" min="0" max="10" value="2" step="1"/></td>
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<td><input id="uiRelays" type="number" min="0" max="10" value="1" step="1"/></td>
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<td>nodes</td>
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</tr>
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<th colspan="2">Storage compression <span title="Percentage by which each node's disk storage space is reduced by using data compression or a compressed file system.">ⓘ</span></th>
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<td><input id="uiCompression" type="number" min="0" max="100" value="75" step="0.1"/></td>
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<td><input id="uiCompression" type="number" min="0" max="100" value="50" step="0.1"/></td>
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<td>%</td>
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<td>USD/month</td>
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<th>Disk (amortized) <span title="The stake pool's monthly cost of perpetually storing the month's transactions on disk.">ⓘ</span></th>
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<th>Disk <span id="uiAmortized">(amortized)</span> <span title="The stake pool's monthly cost of perpetually storing the month's transactions on disk.">ⓘ</span></th>
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<td id="uiCostStorage">?</td>
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<td>USD/month</td>
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</tr>

‎site/static/cost-estimator/view.css‎

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text-align: left;
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}
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input {
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#uiAmortized {
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text-decoration: line-through;
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}
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input[type="text"] {
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width: 75px;
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text-align: right;
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font-family: monospace;
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}
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input[type="number"] {
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width: 75px;
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text-align: right;
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font-family: monospace;
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}
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input[type="button"] {
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width: 75%;
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}
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table {
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width: fit-content;
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border-collapse: collapse;

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