XCP-ng
    • Categories
    • Recent
    • Tags
    • Popular
    • Users
    • Groups
    • Register
    • Login

    QCOW2 support on XOSTOR

    Scheduled Pinned Locked Moved XOSTOR
    3 Posts 3 Posters 39 Views 3 Watching
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • 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

        1 Reply Last reply Reply Quote 0
        • 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.

          1 Reply Last reply Reply Quote 1
          • First post
            Last post