heatcache-mpool

heatcache-mpool() (
    # Get both metadata (directory contents including fstat() details)
    # and shared-cache data the server serves over NFS into SSD L2ARC
    # cache after reboots etc.
    # Note: run this a few times in the background with some time offset
    # to convince ZFS that the data blocks are MRU/MFU'ed several times
    # so should be cached at some layer and not just evicted.
    TSH="`date -u`"
    TSS="`date -u +%s`"
    for D in \
        /mpool/.ccache* /mpool/jenkins-gitcache/ \
    ; do
        ( time du -ks $D/ && echo "^^^ sized $D/") &
        ( time find $D/ -ls > /dev/null && echo "^^^ listed $D/") &
        ( time find $D/ -type f -exec cat '{}' \; > /dev/null && echo "^^^ cat all in $D/") &
    done
    wait
    RES=$?

    TEH="`date -u`"
    TES="`date -u +%s`"

    echo "Caches heated ($RES) from $TSH to $TEH, overall `$(($TES-$TSS))` sec"

    exit $RES
)

=================

                              capacity     operations    bandwidth
pool                       alloc   free   read  write   read  write
-------------------------  -----  -----  -----  -----  -----  -----
mpool                      1.28T  1.44T     18     75   797K   494K
  mirror                   1.28T  1.44T     18     64   797K   449K
    c1t50014EE264023A89d0      -      -     10     39   529K   452K
    c1t50014EE2B957E767d0      -      -      8     39   268K   452K
logs                           -      -      -      -      -      -
  c1t5002538E407750E1d0s3   236K  4.00G      0     11      0  44.8K
cache                          -      -      -      -      -      -
  c1t5002538E407750E1d0s5  19.3G   181G     85      0  3.33M      0





                              capacity     operations    bandwidth
pool                       alloc   free   read  write   read  write
-------------------------  -----  -----  -----  -----  -----  -----
mpool                      1.28T  1.44T    121      0  4.67M      0
  mirror                   1.28T  1.44T    121      0  4.67M      0
    c1t50014EE264023A89d0      -      -     59      0  2.41M      0
    c1t50014EE2B957E767d0      -      -     62      0  2.26M      0
logs                           -      -      -      -      -      -
  c1t5002538E407750E1d0s3   300K  4.00G      0      0      0      0
cache                          -      -      -      -      -      -
  c1t5002538E407750E1d0s5  18.6G   181G    148      0  4.41M      0