16 exabytes of L2ARC?

Nagy, Attila bra at fsn.hu
Fri Sep 26 12:49:23 UTC 2014


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)

What did go wrong and what should I expect?

lz4 compression is enabled on the pool and it has ashift=12.


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