16 exabytes of L2ARC?

[Nikolay Denev]

On Sat, Sep 27, 2014 at 11:13 AM, Nagy, Attila <bra at fsn.hu> wrote:

> On 09/26/14 14:49, Nagy, Attila wrote:
>
>> Hi,
>>
>> Running stable/10 at r271944:
>> # zpool iostat -v
>>                capacity     operations    bandwidth
>> pool        alloc   free   read  write   read  write
>> ----------  -----  -----  -----  -----  -----  -----
>> data        17.3T  40.7T    165  1.24K  1.63M  90.8M
>>   da0       4.31T  10.2T     41    318   418K  22.7M
>>   da1       4.32T  10.2T     41    317   416K  22.7M
>>   da2       4.32T  10.2T     41    317   416K  22.7M
>>   da3       4.31T  10.2T     41    317   418K  22.7M
>> cache           -      -      -      -      -      -
>>   ada0       513G  16.0E    222    179  1.05M  2.79M
>>   ada1       511G  16.0E    222    180  1.05M  2.80M
>> ----------  -----  -----  -----  -----  -----  -----
>>
>> # egrep 'ada.*MB' /var/run/dmesg.boot
>> ada0: 600.000MB/s transfers (SATA 3.x, UDMA5, PIO 512bytes)
>> ada0: 381554MB (781422768 512 byte sectors: 16H 63S/T 16383C)
>> ada1: 600.000MB/s transfers (SATA 3.x, UDMA5, PIO 512bytes)
>> ada1: 381554MB (781422768 512 byte sectors: 16H 63S/T 16383C)
>>
> I've removed the cache devices and re-added them, now it's fine:
> cache           -      -      -      -      -      -
>   ada0       355M   372G     24      0   151K      0
>   ada1       345M   372G     12    505  71.7K  2.79M
>
>
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Hi,

Did you figure out the root cause of this?
I seem to be having the same issue:


[14:31][root at nas:~]#zpool iostat -v | grep -A1 cache
cache             -      -      -      -      -      -
  ada4p1       215G  16.0E      9      3   107K   322K

uname -a : FreeBSD nas.home.lan 10.1-STABLE FreeBSD 10.1-STABLE #14
r274549: Sat Nov 15 14:43:56 UTC 2014
root at nas.home.lan:/usr/obj/usr/src/sys/NAS
 amd64


--Nikolay