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os/bluestore/BlueFS: tune flushing of writes #13032

Merged
merged 3 commits into from Jan 25, 2017
Merged

os/bluestore/BlueFS: tune flushing of writes #13032

merged 3 commits into from Jan 25, 2017

Commits on Jan 23, 2017

  1. os/bluestore/BlueFS: preallocate larger write buffer 

    Signed-off-by: Sage Weil <sage@redhat.com>
    @liewegas
    liewegas committed Jan 23, 2017
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  2. os/bluestore/BlueFS: increase size threshold before we flush (and gen… 

    …erate io)

Having this too high means you might be more bursty. In practice,
though, the commit path is doing explicit syncs on small chunks
anyway.  And compaction work should probably stay reasonably chunky.

Signed-off-by: Sage Weil <sage@redhat.com>
    @liewegas
    liewegas committed Jan 23, 2017
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  3. os/bluestore/BlueFS: tolerate longer tail 

    The important requirement here is that we have enough buffer to write the
whole page.

Signed-off-by: Sage Weil <sage@redhat.com>
    @liewegas
    liewegas committed Jan 23, 2017
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