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  1. Solution Center
  2. SOL-491

EXAStorage Logical View

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    • Type: Explanation
    • Status: Published
    • Affects Version/s: None
    • Fix Version/s: None
    • Component/s: EXAStorage
    • Labels:
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    • Explanation:
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      Volumes

      • Volumes are partitioned into logical blocks
      • Blocks are distributed equally across all nodes/segments
      • Nodes may have segments of multiple volumes

      Segments

      • A segment consists of (an arbitrary number of) partitions
      • Partitions may be distributed across (an arbitrary number of) disks
      • Blocks are distributed equally across all partitions

      Block distribution

      • horizontal block distribution
        • More flexible
        • Application is responsible for handling parallelism
      • vertical block distribution (currently in use)
        • Maximum automatic parallelism
        • Parallelism is not handled by the application
        • Stripe size 1 (4K)
      • Version 6
        • Uses vertical block distribution with stripes (256K, stripe size 64)
        • DATA volumes must be recreated in version 6 to use this improvement, refer to EXASOL-1557

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      Volumes Volumes are partitioned into logical blocks Blocks are distributed equally across all nodes/segments Nodes may have segments of multiple volumes Segments A segment consists of (an arbitrary number of) partitions Partitions may be distributed across (an arbitrary number of) disks Blocks are distributed equally across all partitions Block distribution horizontal block distribution More flexible Application is responsible for handling parallelism vertical block distribution (currently in use) Maximum automatic parallelism Parallelism is not handled by the application Stripe size 1 (4K) Version 6 Uses vertical block distribution with stripes (256K, stripe size 64) DATA volumes must be recreated in version 6 to use this improvement, refer to EXASOL-1557
    • Category 1:
      Cluster Administration

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            • Assignee:
              CaptainEXA Captain EXASOL
              Reporter:
              CaptainEXA Captain EXASOL
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              • Created:
                Updated: