gvinum mirror seems to use only one disk for reading

[Deomid Ryabkov]

>> writes go to both drives as they should and tps numbers are the same, 
>> as expected, but "time spent processing requests" is different for 
>> da0 and da1.
>
>
> I've no idea yet, why that happens.  Have you checked out gstat(8) and 
> how the numbers compare there?
>
about same: da0 getting about twice the load when writing.
sample snapshot of gstat with dd if=/dev/zero of=/usr/test in background:

dT: 2.009  flag_I 2000000us  sizeof 240  i -1
 L(q)  ops/s    r/s   kBps   ms/r    w/s   kBps   ms/w   %busy Name
    0      0      0      0    0.0      0      0    0.0    0.0| fd0
    0     85      0      0    0.0     85  10550    3.7   31.2| da0
    0     84      0      0    0.0     84  10486    2.1   17.4| da1
    0     85      0      0    0.0     85  10550    3.8   31.5| da0s1
    0     84      0      0    0.0     84  10486    2.1   17.7| da1s1

(forgot to mention: the system is RELENG_5 as of 28th Feb).

btw, there's also a single weird line in my gstat output:

 4294967293    185    185    522    0.5      0      0    0.0  105.2| 
gvinum/plex/usr.p1

percentage often exceeds 100 and that large value for L(q) seems like 
(uunit32_t) -1 to me.
other values look correct and correspond to those shown for other 
components of the setup.

--
Deomid Ryabkov aka Rojer
myself at rojer.pp.ru
rojer at sysadmins.ru
ICQ: 8025844

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