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  1. Core Server
  2. SERVER-13329

Flush different regions of mmap files in parallel to achieve higher flush times on Windows

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    Details

    • Type: Task
    • Status: Open
    • Priority: Minor - P4
    • Resolution: Unresolved
    • Affects Version/s: None
    • Fix Version/s: Backlog
    • Component/s: Concurrency, Storage
    • Labels:
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      Description

      Presently mmap'ed file flush happens in sequence for multiple files. This results in long flush times on Azure / Windows platform where the OS is not able to do concurrent flushes of the contents of the file. See SERVER-12401 for more details.

      The issue is especially critical if there are lot of random updates that dirty large parts of the mmap'ed region. At some point (Q3'14?) Microsoft will release the fix for the Windows Cache Manager, and we will be able to flush file regions in parallel. It will provide better performance than SERVER-12733 on average.

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            Assignee:
            backlog-server-platform DO NOT USE - Backlog - Platform Team
            Reporter:
            alex.komyagin Alexander Komyagin
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              Dates

              Created:
              Updated: