Re: read performance not perfect

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On 08/04/2011 10:53 PM, Sage Weil wrote:

The current patches are on top of v3.0, but you should be able to rebase
the readahead stuff on top of anything reasonably recent.

sage

As usual.
cluster - latest 0.32 from your ubuntu rep.
client - latest git-pulled kernel.

dd file from cluster to /dev/null and press ctrl-c. In syslog:

[   12.950114] libceph: mon0 10.5.51.230:6789 connection failed
[   19.971512] libceph: client4119 fsid af9be081-9777-e2cc-8988-ba02fff0f390
[   19.971845] libceph: mon0 10.5.51.230:6789 session established
[   92.891202] libceph: try_read bad con->in_tag = -108
[   92.891258] libceph: osd5 10.5.51.145:6801 protocol error, garbage tag
[  114.508350] libceph: try_read bad con->in_tag = 122
[  114.508406] libceph: osd1 10.5.51.141:6800 protocol error, garbage tag
[  119.077246] libceph: try_read bad con->in_tag = -39
[  119.077301] libceph: osd7 10.5.51.147:6801 protocol error, garbage tag

WBR,
    Fyodor.


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