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This change moves the trace conventions (such as table and column names)
in a separate conv package, so that it is separated from the main API.
This also allows for a potential move into a separate module in the
future.
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This change updates the OpenDC VM trace format to incorporate the VM
interference model in the trace format itself. This makes sense since
the model is tightly coupled to the actual trace that is being
simulated.
This approach has as benefit that we can directly load the
interference model from the workload trace, without having to resolve
the model seperately (as we did before).
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This change removes the opendc-platform module from the project. This
module represented a Java platform which was previously used for sharing
a set of dependency versions between subprojects. However, with the
version catalogue that was added by Gradle, we currently do not use the
platform anymore.
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This change updates the implementation of the trace converter and
SimTrace implementation to support cases where there is a gap between
samples in the trace data.
This change allows users to specify what to do in case samples are
missing in the trace. The available options are specified in
`SimTrace.FillMode`. Currently, we support either carrying the previous
value forward or set the usage to zero.
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This change adds support for converting the Azure VM traces into the
OpenDC trace format.
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This change adds a new API for writing traces in a trace format.
Currently, writing is only supported by the OpenDC VM format, but over
time the other formats will also have support for writing added.
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This change simplifies the TraceFormat SPI interface by reducing the
number of interfaces that implementors need to implement to only
TraceFormat.
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This change adds support for looking up the column value through the
column index. This enables faster lookup when processing very large
traces.
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This change unifies columns of different tables used by trace formats.
This concretely means that instead of having columns specific per table
(e.g., RESOURCE_ID and RESOURCE_STATE_ID), with this changes these
columns are shared between the tables with a single definition
(RESOURCE_ID).
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This change optimizes the OpenDC VM trace format by removing
unnecessary columns as well as optimizing the writer settings.
The new implementation still supports reading the old trace format in
case users run OpenDC with older workload traces.
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This change enables users to open traces of various trace formats by
dynamically specifying the format name. The trace API will use the
service loader to resolve the available trace formats on the classpath.
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This change adds a new API to the Table interface for accessing the
table columns that the table supports. This does not necessarily mean
that the column will have a value for every row, but that the table
format has defined this particular column.
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This change adds support for reading WfCommons workflow traces in
OpenDC. This functionality is available in the new
`opendc-trace-wfformat` module.
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This change removes the external class that holds the state of the
reader and instead puts the state in the reader implementation.
Maintaining a separate class for the state increases the complexity and
has worse performance characteristics due to the bytecode produced by
Kotlin for property accesses.
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This change updates the trace reading classes in the Capelin experiment
to use the new trace API in order to re-use many of the trace reading
parts.
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This change introduces a new OpenDC API for reading various trace
formats in a streaming manner.
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