  The adoption of cloud computing is steadily increasing in designing and
implementing software systems, thus it becomes imperative to consider the
sustainability implications of these processes. While there has already been
some academic research on this topic, there is a lack of perspective from
practitioners. To bridge this gap, we utilize software repository mining
techniques to examine 192 discussions among practitioners on the Software
Engineering forum of the StackExchange platform, aiming to build an annotated
dataset containing cloud architectural discussions and to understand the
current discussion on sustainability in cloud architecture. To identify these
discussions, we first put together a list of terms indicating sustainability as
the topic. Our initial findings indicate practitioners mainly focus on design
aspects (analysis, synthesis, and implementation) while avoiding complex
activities like evaluation and maintenance. Technical sustainability is
emphasized, while the economic dimension has the most discussions exclusively
focused on it. This contrasts with previous academic literature, which
highlighted environmental sustainability.
