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    QCOW2 support on XOSTOR

    Scheduled Pinned Locked Moved XOSTOR
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    • T Offline
      TestForEcho
      last edited by

      What's the current status and/or roadmap for QCOW2 support on XOSTOR?

      ronan-aR 1 Reply Last reply Reply Quote 0
      • olivierlambertO Offline
        olivierlambert Vates 🪐 Co-Founder CEO
        last edited by

        I will leave the @Team-Storage to answer that

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        • ronan-aR Offline
          ronan-a Vates 🪐 XCP-ng Team @TestForEcho
          last edited by

          @TestForEcho No ETA for now. Even before supporting QCOW2 on LINSTOR, we have several points to robustify (HA performance, potential race conditions, etc.). Regarding other important points:

          • Supporting volumes larger than 2TB has significant impacts on synchronization, RAM usage, coalesce, etc. We need to find a way to cope with these changes.
          • The coalesce algorithm should be changed to no longer depend on the write speed to the SR in order to prevent potential coalesce interruptions; this is even more crucial for LINSTOR.
          • The coalesce behavior is not exactly the same for QCOW2, and we believe that currently this could negatively impact the API impl in the case of LINSTOR.

          In short: QCOW2 has led to changes that require a long-term investment in several topics before even considering supporting this format on XOSTOR.

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