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Relax the requirement that an objective function has to be a scalar expression #82

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lalithsuresh opened this issue Mar 17, 2021 · 0 comments
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Relax the requirement that an objective function has to be a scalar expression #82

lalithsuresh opened this issue Mar 17, 2021 · 0 comments

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If it's not a scalar expression (e.g., preference for certain assignments to hold true), we can simply encode it as a sum on behalf of the user.
lalithsuresh added a commit that referenced this issue Mar 17, 2021
@lalithsuresh
[#82] Relax the requirement that an objective function has to be a sc…
e515bb7 
…alar expression

Objective functions until now have been a scalar expression whose value DCM will
try to maximize. We've now simplified this to also allow for column expressions.
The objective function in the latter case will maximize the sum of the individual
column values.

Signed-off-by: Lalith Suresh <lsuresh@vmware.com>
lalithsuresh added a commit that referenced this issue Mar 17, 2021
@lalithsuresh
[#82] Relax the requirement that an objective function has to be a sc…
bc5c017 
…alar expression

Objective functions until now have been a scalar expression whose value DCM will
try to maximize. We've now simplified this to also allow for column expressions.
The objective function in the latter case will maximize the sum of the individual
column values.

Fixed #82

Signed-off-by: Lalith Suresh <lsuresh@vmware.com>
@lalithsuresh lalithsuresh mentioned this issue Mar 17, 2021
Merged
lalithsuresh added a commit that referenced this issue Mar 17, 2021
@lalithsuresh
[#81, #82] docs: update reference.md to reflect changes to objective …
5eafdbb 
…function syntax

Signed-off-by: Lalith Suresh <lsuresh@vmware.com>
lalithsuresh added a commit that referenced this issue Mar 17, 2021
@lalithsuresh
[#81, #82] docs: update reference.md to reflect changes to objective …
e42a3ab 
…function syntax

Signed-off-by: Lalith Suresh <lsuresh@vmware.com>
lalithsuresh added a commit that referenced this issue Mar 18, 2021
@lalithsuresh
[#81, #82] docs: update reference.md to reflect changes to objective …
1ec3a2a 
…function syntax

Signed-off-by: Lalith Suresh <lsuresh@vmware.com>
@lalithsuresh lalithsuresh mentioned this issue Jun 22, 2021
Closed
lalithsuresh added a commit that referenced this issue Jun 22, 2021
@lalithsuresh
[#96] dcm: Use consistent syntax for hard constraints and objectives (#…
7e620c0 
…100)

With #82 being fixed, there is little reason to have a different query structure for hard and soft constraints. We can instead structure both constraints as a view that produces a set of records, followed by a CHECK or MAXIMIZE clause, followed by an expression. This would allow a user to easily switch between hard/soft constraints if they want.

Signed-off-by: Lalith Suresh <lsuresh@vmware.com>
askiad pushed a commit to askiad/declarative-cluster-management that referenced this issue Jun 23, 2021
@lalithsuresh @askiad
[vmware-archive#96] dcm: Use consistent syntax for hard constraints a…
af07bf9 
…nd objectives (vmware-archive#100)

With vmware-archive#82 being fixed, there is little reason to have a different query structure for hard and soft constraints. We can instead structure both constraints as a view that produces a set of records, followed by a CHECK or MAXIMIZE clause, followed by an expression. This would allow a user to easily switch between hard/soft constraints if they want.

Signed-off-by: Lalith Suresh <lsuresh@vmware.com>
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