[JBoss JIRA] (MODCLUSTER-606) Documentation Error - Chapter 10 - Time decay formulas
by Leandro Quiroga (JIRA)
[ https://issues.jboss.org/browse/MODCLUSTER-606?page=com.atlassian.jira.pl... ]
Leandro Quiroga updated MODCLUSTER-606:
---------------------------------------
Description:
In chapter 10 (http://docs.jboss.org/mod_cluster/1.3.0/html_single/#java.load), it says:
The DynamicLoadBalanceFactorProvider applies a time decay function to the loads returned by each metric. The aggregate load, with respect to previous load values, can be expressed by the following formula:
L = (L ~0~ + L ~1~/D + L ~2~/D ^2^ + L ~3~/D ^3^ + ... + L ~H~/D ^H^) * (1 + D + D ^2^ + D ^3^ + ... D ^H^)
... or more concisely as:
L = (∑^H^~i=0~ L~i~/D^i^) * (∑^H^~i=0~ D^i^)
... where D = decayFactor, and H = history.
But both formulas are wrong.
It should says:
The DynamicLoadBalanceFactorProvider applies a time decay function to the loads returned by each metric. The aggregate load, with respect to previous load values, can be expressed by the following formula:
L = (L0/D0 + L1/D1 + L2/D2 + L3/D3 + ... + LH/DH) / (1/D0 + 1/D1 + 1/D2 + 1/D3 + ... 1/DH)
... or more concisely as:
L = (∑Hi=0 Li/Di) / (∑Hi=0 1/Di)
... where D = decayFactor, and H = history.
was:
In chapter 10 (http://docs.jboss.org/mod_cluster/1.3.0/html_single/#java.load), it says:
The DynamicLoadBalanceFactorProvider applies a time decay function to the loads returned by each metric. The aggregate load, with respect to previous load values, can be expressed by the following formula:
L = (L ~0~ + L ~1~/D + L ~2~/D ^2^ + L ~3~/D ^3^ + ... + LH/D ^H^) * (1 + D + D ^2^ + D ^3^ + ... D ^H^)
... or more concisely as:
L = (∑^H^~i=0~ L~i~/D^i^) * (∑^H^~i=0~ D^i^)
... where D = decayFactor, and H = history.
But both formulas are wrong.
It should says:
The DynamicLoadBalanceFactorProvider applies a time decay function to the loads returned by each metric. The aggregate load, with respect to previous load values, can be expressed by the following formula:
L = (L0/D0 + L1/D1 + L2/D2 + L3/D3 + ... + LH/DH) / (1/D0 + 1/D1 + 1/D2 + 1/D3 + ... 1/DH)
... or more concisely as:
L = (∑Hi=0 Li/Di) / (∑Hi=0 1/Di)
... where D = decayFactor, and H = history.
> Documentation Error - Chapter 10 - Time decay formulas
> ------------------------------------------------------
>
> Key: MODCLUSTER-606
> URL: https://issues.jboss.org/browse/MODCLUSTER-606
> Project: mod_cluster
> Issue Type: Bug
> Components: Documentation & Demos
> Affects Versions: 1.2.13.Final, 1.3.7.Final
> Reporter: Leandro Quiroga
> Assignee: Jean-Frederic Clere
> Priority: Minor
> Labels: documentation
> Original Estimate: 1 hour
> Remaining Estimate: 1 hour
>
> In chapter 10 (http://docs.jboss.org/mod_cluster/1.3.0/html_single/#java.load), it says:
> The DynamicLoadBalanceFactorProvider applies a time decay function to the loads returned by each metric. The aggregate load, with respect to previous load values, can be expressed by the following formula:
> L = (L ~0~ + L ~1~/D + L ~2~/D ^2^ + L ~3~/D ^3^ + ... + L ~H~/D ^H^) * (1 + D + D ^2^ + D ^3^ + ... D ^H^)
> ... or more concisely as:
> L = (∑^H^~i=0~ L~i~/D^i^) * (∑^H^~i=0~ D^i^)
> ... where D = decayFactor, and H = history.
>
> But both formulas are wrong.
> It should says:
> The DynamicLoadBalanceFactorProvider applies a time decay function to the loads returned by each metric. The aggregate load, with respect to previous load values, can be expressed by the following formula:
> L = (L0/D0 + L1/D1 + L2/D2 + L3/D3 + ... + LH/DH) / (1/D0 + 1/D1 + 1/D2 + 1/D3 + ... 1/DH)
> ... or more concisely as:
> L = (∑Hi=0 Li/Di) / (∑Hi=0 1/Di)
> ... where D = decayFactor, and H = history.
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6 years, 12 months
[JBoss JIRA] (MODCLUSTER-606) Documentation Error - Chapter 10 - Time decay formulas
by Leandro Quiroga (JIRA)
[ https://issues.jboss.org/browse/MODCLUSTER-606?page=com.atlassian.jira.pl... ]
Leandro Quiroga updated MODCLUSTER-606:
---------------------------------------
Description:
In chapter 10 (http://docs.jboss.org/mod_cluster/1.3.0/html_single/#java.load), it says:
The DynamicLoadBalanceFactorProvider applies a time decay function to the loads returned by each metric. The aggregate load, with respect to previous load values, can be expressed by the following formula:
L = (L ~0~ + L ~1~/D + L ~2~/D ^2^ + L ~3~/D ^3^ + ... + LH/D ^H^) * (1 + D + D ^2^ + D ^3^ + ... D ^H^)
... or more concisely as:
L = (∑^H^~i=0~ L~i~/D^i^) * (∑^H^~i=0~ D^i^)
... where D = decayFactor, and H = history.
But both formulas are wrong.
It should says:
The DynamicLoadBalanceFactorProvider applies a time decay function to the loads returned by each metric. The aggregate load, with respect to previous load values, can be expressed by the following formula:
L = (L0/D0 + L1/D1 + L2/D2 + L3/D3 + ... + LH/DH) / (1/D0 + 1/D1 + 1/D2 + 1/D3 + ... 1/DH)
... or more concisely as:
L = (∑Hi=0 Li/Di) / (∑Hi=0 1/Di)
... where D = decayFactor, and H = history.
was:
In chapter 10 (http://docs.jboss.org/mod_cluster/1.3.0/html_single/#java.load), it says:
The DynamicLoadBalanceFactorProvider applies a time decay function to the loads returned by each metric. The aggregate load, with respect to previous load values, can be expressed by the following formula:
L = (L ~0~ + L~1~/D + L~2~/D^2^ + L~3~/D^3^ + ... + LH/D^H^) * (1 + D + D^2^ + D^3^ + ... D^H^)
... or more concisely as:
L = (∑^H^~i=0~ L~i~/D^i^) * (∑^H^~i=0~ D^i^)
... where D = decayFactor, and H = history.
But both formulas are wrong.
It should says:
The DynamicLoadBalanceFactorProvider applies a time decay function to the loads returned by each metric. The aggregate load, with respect to previous load values, can be expressed by the following formula:
L = (L0/D0 + L1/D1 + L2/D2 + L3/D3 + ... + LH/DH) / (1/D0 + 1/D1 + 1/D2 + 1/D3 + ... 1/DH)
... or more concisely as:
L = (∑Hi=0 Li/Di) / (∑Hi=0 1/Di)
... where D = decayFactor, and H = history.
> Documentation Error - Chapter 10 - Time decay formulas
> ------------------------------------------------------
>
> Key: MODCLUSTER-606
> URL: https://issues.jboss.org/browse/MODCLUSTER-606
> Project: mod_cluster
> Issue Type: Bug
> Components: Documentation & Demos
> Affects Versions: 1.2.13.Final, 1.3.7.Final
> Reporter: Leandro Quiroga
> Assignee: Jean-Frederic Clere
> Priority: Minor
> Labels: documentation
> Original Estimate: 1 hour
> Remaining Estimate: 1 hour
>
> In chapter 10 (http://docs.jboss.org/mod_cluster/1.3.0/html_single/#java.load), it says:
> The DynamicLoadBalanceFactorProvider applies a time decay function to the loads returned by each metric. The aggregate load, with respect to previous load values, can be expressed by the following formula:
> L = (L ~0~ + L ~1~/D + L ~2~/D ^2^ + L ~3~/D ^3^ + ... + LH/D ^H^) * (1 + D + D ^2^ + D ^3^ + ... D ^H^)
> ... or more concisely as:
> L = (∑^H^~i=0~ L~i~/D^i^) * (∑^H^~i=0~ D^i^)
> ... where D = decayFactor, and H = history.
>
> But both formulas are wrong.
> It should says:
> The DynamicLoadBalanceFactorProvider applies a time decay function to the loads returned by each metric. The aggregate load, with respect to previous load values, can be expressed by the following formula:
> L = (L0/D0 + L1/D1 + L2/D2 + L3/D3 + ... + LH/DH) / (1/D0 + 1/D1 + 1/D2 + 1/D3 + ... 1/DH)
> ... or more concisely as:
> L = (∑Hi=0 Li/Di) / (∑Hi=0 1/Di)
> ... where D = decayFactor, and H = history.
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[JBoss JIRA] (MODCLUSTER-606) Documentation Error - Chapter 10 - Time decay formulas
by Leandro Quiroga (JIRA)
[ https://issues.jboss.org/browse/MODCLUSTER-606?page=com.atlassian.jira.pl... ]
Leandro Quiroga updated MODCLUSTER-606:
---------------------------------------
Description:
In chapter 10 (http://docs.jboss.org/mod_cluster/1.3.0/html_single/#java.load), it says:
The DynamicLoadBalanceFactorProvider applies a time decay function to the loads returned by each metric. The aggregate load, with respect to previous load values, can be expressed by the following formula:
L = (L ~0~ + L~1~/D + L~2~/D^2^ + L~3~/D^3^ + ... + LH/D^H^) * (1 + D + D^2^ + D^3^ + ... D^H^)
... or more concisely as:
L = (∑^H^~i=0~ L~i~/D^i^) * (∑^H^~i=0~ D^i^)
... where D = decayFactor, and H = history.
But both formulas are wrong.
It should says:
The DynamicLoadBalanceFactorProvider applies a time decay function to the loads returned by each metric. The aggregate load, with respect to previous load values, can be expressed by the following formula:
L = (L0/D0 + L1/D1 + L2/D2 + L3/D3 + ... + LH/DH) / (1/D0 + 1/D1 + 1/D2 + 1/D3 + ... 1/DH)
... or more concisely as:
L = (∑Hi=0 Li/Di) / (∑Hi=0 1/Di)
... where D = decayFactor, and H = history.
was:
In chapter 10 (http://docs.jboss.org/mod_cluster/1.3.0/html_single/#java.load), it says:
The DynamicLoadBalanceFactorProvider applies a time decay function to the loads returned by each metric. The aggregate load, with respect to previous load values, can be expressed by the following formula:
L = (L~0~ + L~1~/D + L~2~/D^2^ + L~3~/D^3^ + ... + LH/D^H^) * (1 + D + D^2^ + D^3^ + ... D^H^)
... or more concisely as:
L = (∑^H^~i=0~ L~i~/D^i^) * (∑^H^~i=0~ D^i^)
... where D = decayFactor, and H = history.
But both formulas are wrong.
It should says:
The DynamicLoadBalanceFactorProvider applies a time decay function to the loads returned by each metric. The aggregate load, with respect to previous load values, can be expressed by the following formula:
L = (L0/D0 + L1/D1 + L2/D2 + L3/D3 + ... + LH/DH) / (1/D0 + 1/D1 + 1/D2 + 1/D3 + ... 1/DH)
... or more concisely as:
L = (∑Hi=0 Li/Di) / (∑Hi=0 1/Di)
... where D = decayFactor, and H = history.
> Documentation Error - Chapter 10 - Time decay formulas
> ------------------------------------------------------
>
> Key: MODCLUSTER-606
> URL: https://issues.jboss.org/browse/MODCLUSTER-606
> Project: mod_cluster
> Issue Type: Bug
> Components: Documentation & Demos
> Affects Versions: 1.2.13.Final, 1.3.7.Final
> Reporter: Leandro Quiroga
> Assignee: Jean-Frederic Clere
> Priority: Minor
> Labels: documentation
> Original Estimate: 1 hour
> Remaining Estimate: 1 hour
>
> In chapter 10 (http://docs.jboss.org/mod_cluster/1.3.0/html_single/#java.load), it says:
> The DynamicLoadBalanceFactorProvider applies a time decay function to the loads returned by each metric. The aggregate load, with respect to previous load values, can be expressed by the following formula:
> L = (L ~0~ + L~1~/D + L~2~/D^2^ + L~3~/D^3^ + ... + LH/D^H^) * (1 + D + D^2^ + D^3^ + ... D^H^)
> ... or more concisely as:
> L = (∑^H^~i=0~ L~i~/D^i^) * (∑^H^~i=0~ D^i^)
> ... where D = decayFactor, and H = history.
>
> But both formulas are wrong.
> It should says:
> The DynamicLoadBalanceFactorProvider applies a time decay function to the loads returned by each metric. The aggregate load, with respect to previous load values, can be expressed by the following formula:
> L = (L0/D0 + L1/D1 + L2/D2 + L3/D3 + ... + LH/DH) / (1/D0 + 1/D1 + 1/D2 + 1/D3 + ... 1/DH)
> ... or more concisely as:
> L = (∑Hi=0 Li/Di) / (∑Hi=0 1/Di)
> ... where D = decayFactor, and H = history.
--
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6 years, 12 months
[JBoss JIRA] (MODCLUSTER-606) Documentation Error - Chapter 10 - Time decay formulas
by Leandro Quiroga (JIRA)
[ https://issues.jboss.org/browse/MODCLUSTER-606?page=com.atlassian.jira.pl... ]
Leandro Quiroga updated MODCLUSTER-606:
---------------------------------------
Description:
In chapter 10 (http://docs.jboss.org/mod_cluster/1.3.0/html_single/#java.load), it says:
The DynamicLoadBalanceFactorProvider applies a time decay function to the loads returned by each metric. The aggregate load, with respect to previous load values, can be expressed by the following formula:
L = (L0 + L~1~/D + L~2~/D^2^ + L~3~/D^3^ + ... + LH/D^H^) * (1 + D + D^2^ + D^3^ + ... D^H^)
... or more concisely as:
L = (∑^H^~i=0~ L~i~/D^i^) * (∑^H^~i=0~ D^i^)
... where D = decayFactor, and H = history.
But both formulas are wrong.
It should says:
The DynamicLoadBalanceFactorProvider applies a time decay function to the loads returned by each metric. The aggregate load, with respect to previous load values, can be expressed by the following formula:
L = (L0/D0 + L1/D1 + L2/D2 + L3/D3 + ... + LH/DH) / (1/D0 + 1/D1 + 1/D2 + 1/D3 + ... 1/DH)
... or more concisely as:
L = (∑Hi=0 Li/Di) / (∑Hi=0 1/Di)
... where D = decayFactor, and H = history.
was:
In chapter 10 (http://docs.jboss.org/mod_cluster/1.3.0/html_single/#java.load), it says:
The DynamicLoadBalanceFactorProvider applies a time decay function to the loads returned by each metric. The aggregate load, with respect to previous load values, can be expressed by the following formula:
L = (L0 + L1/D + L2/D2 + L3/D3 + ... + LH/DH) * (1 + D + D2 + D3 + ... DH)
... or more concisely as:
L = (∑Hi=0 Li/Di) * (∑Hi=0 Di)
... where D = decayFactor, and H = history.
But both formulas are wrong.
It should says:
The DynamicLoadBalanceFactorProvider applies a time decay function to the loads returned by each metric. The aggregate load, with respect to previous load values, can be expressed by the following formula:
L = (L0/D0 + L1/D1 + L2/D2 + L3/D3 + ... + LH/DH) / (1/D0 + 1/D1 + 1/D2 + 1/D3 + ... 1/DH)
... or more concisely as:
L = (∑Hi=0 Li/Di) / (∑Hi=0 1/Di)
... where D = decayFactor, and H = history.
> Documentation Error - Chapter 10 - Time decay formulas
> ------------------------------------------------------
>
> Key: MODCLUSTER-606
> URL: https://issues.jboss.org/browse/MODCLUSTER-606
> Project: mod_cluster
> Issue Type: Bug
> Components: Documentation & Demos
> Affects Versions: 1.2.13.Final, 1.3.7.Final
> Reporter: Leandro Quiroga
> Assignee: Jean-Frederic Clere
> Priority: Minor
> Labels: documentation
> Original Estimate: 1 hour
> Remaining Estimate: 1 hour
>
> In chapter 10 (http://docs.jboss.org/mod_cluster/1.3.0/html_single/#java.load), it says:
> The DynamicLoadBalanceFactorProvider applies a time decay function to the loads returned by each metric. The aggregate load, with respect to previous load values, can be expressed by the following formula:
> L = (L0 + L~1~/D + L~2~/D^2^ + L~3~/D^3^ + ... + LH/D^H^) * (1 + D + D^2^ + D^3^ + ... D^H^)
> ... or more concisely as:
> L = (∑^H^~i=0~ L~i~/D^i^) * (∑^H^~i=0~ D^i^)
> ... where D = decayFactor, and H = history.
>
> But both formulas are wrong.
> It should says:
> The DynamicLoadBalanceFactorProvider applies a time decay function to the loads returned by each metric. The aggregate load, with respect to previous load values, can be expressed by the following formula:
> L = (L0/D0 + L1/D1 + L2/D2 + L3/D3 + ... + LH/DH) / (1/D0 + 1/D1 + 1/D2 + 1/D3 + ... 1/DH)
> ... or more concisely as:
> L = (∑Hi=0 Li/Di) / (∑Hi=0 1/Di)
> ... where D = decayFactor, and H = history.
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6 years, 12 months
[JBoss JIRA] (MODCLUSTER-606) Documentation Error - Chapter 10 - Time decay formulas
by Leandro Quiroga (JIRA)
[ https://issues.jboss.org/browse/MODCLUSTER-606?page=com.atlassian.jira.pl... ]
Leandro Quiroga updated MODCLUSTER-606:
---------------------------------------
Description:
In chapter 10 (http://docs.jboss.org/mod_cluster/1.3.0/html_single/#java.load), it says:
The DynamicLoadBalanceFactorProvider applies a time decay function to the loads returned by each metric. The aggregate load, with respect to previous load values, can be expressed by the following formula:
L = (L~0~ + L~1~/D + L~2~/D^2^ + L~3~/D^3^ + ... + LH/D^H^) * (1 + D + D^2^ + D^3^ + ... D^H^)
... or more concisely as:
L = (∑^H^~i=0~ L~i~/D^i^) * (∑^H^~i=0~ D^i^)
... where D = decayFactor, and H = history.
But both formulas are wrong.
It should says:
The DynamicLoadBalanceFactorProvider applies a time decay function to the loads returned by each metric. The aggregate load, with respect to previous load values, can be expressed by the following formula:
L = (L0/D0 + L1/D1 + L2/D2 + L3/D3 + ... + LH/DH) / (1/D0 + 1/D1 + 1/D2 + 1/D3 + ... 1/DH)
... or more concisely as:
L = (∑Hi=0 Li/Di) / (∑Hi=0 1/Di)
... where D = decayFactor, and H = history.
was:
In chapter 10 (http://docs.jboss.org/mod_cluster/1.3.0/html_single/#java.load), it says:
The DynamicLoadBalanceFactorProvider applies a time decay function to the loads returned by each metric. The aggregate load, with respect to previous load values, can be expressed by the following formula:
L = (L0 + L~1~/D + L~2~/D^2^ + L~3~/D^3^ + ... + LH/D^H^) * (1 + D + D^2^ + D^3^ + ... D^H^)
... or more concisely as:
L = (∑^H^~i=0~ L~i~/D^i^) * (∑^H^~i=0~ D^i^)
... where D = decayFactor, and H = history.
But both formulas are wrong.
It should says:
The DynamicLoadBalanceFactorProvider applies a time decay function to the loads returned by each metric. The aggregate load, with respect to previous load values, can be expressed by the following formula:
L = (L0/D0 + L1/D1 + L2/D2 + L3/D3 + ... + LH/DH) / (1/D0 + 1/D1 + 1/D2 + 1/D3 + ... 1/DH)
... or more concisely as:
L = (∑Hi=0 Li/Di) / (∑Hi=0 1/Di)
... where D = decayFactor, and H = history.
> Documentation Error - Chapter 10 - Time decay formulas
> ------------------------------------------------------
>
> Key: MODCLUSTER-606
> URL: https://issues.jboss.org/browse/MODCLUSTER-606
> Project: mod_cluster
> Issue Type: Bug
> Components: Documentation & Demos
> Affects Versions: 1.2.13.Final, 1.3.7.Final
> Reporter: Leandro Quiroga
> Assignee: Jean-Frederic Clere
> Priority: Minor
> Labels: documentation
> Original Estimate: 1 hour
> Remaining Estimate: 1 hour
>
> In chapter 10 (http://docs.jboss.org/mod_cluster/1.3.0/html_single/#java.load), it says:
> The DynamicLoadBalanceFactorProvider applies a time decay function to the loads returned by each metric. The aggregate load, with respect to previous load values, can be expressed by the following formula:
> L = (L~0~ + L~1~/D + L~2~/D^2^ + L~3~/D^3^ + ... + LH/D^H^) * (1 + D + D^2^ + D^3^ + ... D^H^)
> ... or more concisely as:
> L = (∑^H^~i=0~ L~i~/D^i^) * (∑^H^~i=0~ D^i^)
> ... where D = decayFactor, and H = history.
>
> But both formulas are wrong.
> It should says:
> The DynamicLoadBalanceFactorProvider applies a time decay function to the loads returned by each metric. The aggregate load, with respect to previous load values, can be expressed by the following formula:
> L = (L0/D0 + L1/D1 + L2/D2 + L3/D3 + ... + LH/DH) / (1/D0 + 1/D1 + 1/D2 + 1/D3 + ... 1/DH)
> ... or more concisely as:
> L = (∑Hi=0 Li/Di) / (∑Hi=0 1/Di)
> ... where D = decayFactor, and H = history.
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6 years, 12 months
[JBoss JIRA] (MODCLUSTER-607) Double decay factor
by Leandro Quiroga (JIRA)
Leandro Quiroga created MODCLUSTER-607:
------------------------------------------
Summary: Double decay factor
Key: MODCLUSTER-607
URL: https://issues.jboss.org/browse/MODCLUSTER-607
Project: mod_cluster
Issue Type: Enhancement
Components: Core & Container Integration (Java)
Affects Versions: 1.3.7.Final, 1.2.13.Final
Reporter: Leandro Quiroga
Assignee: Jean-Frederic Clere
Priority: Minor
The int type is too restrictive for specifying the decay factor.
Using a decay factor of 1 means no decay.
Next value is 2, and the importance of loads decreases too fast:
||Instant||Importance||
|0|100%|
|1|50%|
|2|25%|
|3|12.5%|
|4|6.3%|
|5|3.1%|
|6|1.6%|
|7|0.8%|
|8|0.4%|
|9|0.2%|
Next value is 3, and the importance of loads decreases even faster:
||Instant||Importance||
|0|100%|
|1|33%|
|2|11%|
|3|3.7%|
|4|1.2%|
|5|0.4%|
|6|0.1%|
|7|0.0%|
|8|0.0%|
|9|0.0%|
Using a double for decay factor isn't complex and allows much more precision.
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[JBoss JIRA] (MODCLUSTER-606) Documentation Error - Chapter 10 - Time decay formulas
by Leandro Quiroga (JIRA)
Leandro Quiroga created MODCLUSTER-606:
------------------------------------------
Summary: Documentation Error - Chapter 10 - Time decay formulas
Key: MODCLUSTER-606
URL: https://issues.jboss.org/browse/MODCLUSTER-606
Project: mod_cluster
Issue Type: Bug
Components: Documentation & Demos
Affects Versions: 1.3.7.Final, 1.2.13.Final
Reporter: Leandro Quiroga
Assignee: Jean-Frederic Clere
Priority: Minor
In chapter 10 (http://docs.jboss.org/mod_cluster/1.3.0/html_single/#java.load), it says:
The DynamicLoadBalanceFactorProvider applies a time decay function to the loads returned by each metric. The aggregate load, with respect to previous load values, can be expressed by the following formula:
L = (L0 + L1/D + L2/D2 + L3/D3 + ... + LH/DH) * (1 + D + D2 + D3 + ... DH)
... or more concisely as:
L = (∑Hi=0 Li/Di) * (∑Hi=0 Di)
... where D = decayFactor, and H = history.
But both formulas are wrong.
It should says:
The DynamicLoadBalanceFactorProvider applies a time decay function to the loads returned by each metric. The aggregate load, with respect to previous load values, can be expressed by the following formula:
L = (L0/D0 + L1/D1 + L2/D2 + L3/D3 + ... + LH/DH) / (1/D0 + 1/D1 + 1/D2 + 1/D3 + ... 1/DH)
... or more concisely as:
L = (∑Hi=0 Li/Di) / (∑Hi=0 1/Di)
... where D = decayFactor, and H = history.
--
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6 years, 12 months