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This change addresses an issue where the timestamps in the Azure trace
where not retrieved correctly from the files.
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This change updates the Azure VM trace format implementation to directly
support loading a trace in GZIP format in order to prevent users having
to decompress the trace files so they can be opened by OpenDC.
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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 adds support in the trace library for the Azure VM trace
format.
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