We just dropped in two 1TB Flash Cache cards in to our CDOT 8.2.2 cluster this morning. The cards show up fine on each controller and it looks to be enabled but we are seeing a 0% hit percentage. What am I missing? I know the cards need to warm-up but the filer has been running for almost 6 hours and it is still at 0%...
ntap-cl01::> node run -node ntap-cl01-node01 -command options flexscale
flexscale.enable on (same value in local+partner recommended)
flexscale.lopri_blocks on (same value in local+partner recommended)
flexscale.normal_data_blocks on (same value in local+partner recommended)
flexscale.pcs_high_res off (same value in local+partner recommended)
flexscale.pcs_size 0GB (same value in local+partner recommended)
flexscale.readahead_blocks off (same value in local+partner recommended)
flexscale.rewarm on (same value in local+partner recommended)
ntap-cl01::> node run -node ntap-cl01-node01 -command stats show -p flexscale-access
Cache Reads Writes Disk Reads
Usage Hit Meta Miss Hit Evict Inval Insert Chain Blocks Chain Blocks Replaced
% /s /s /s % /s /s /s /s /s /s /s /s
0 0 0 0 100 0 0 2 0 0 0 0 0
0 0 0 0 75 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 3 0 0 0 12 0
0 0 0 0 100 0 0 3 0 0 0 0 0
ntap-cl01::> node run -node ntap-cl01-node01 -command sysstat -x 1
CPU NFS CIFS HTTP Total Net kB/s Disk kB/s Tape kB/s Cache Cache CP CP Disk OTHER FCP iSCSI FCP kB/s iSCSI kB/s
in out read write read write age hit time ty util in out in out
23% 2403 0 0 2426 6829 167776 169400 24 0 0 42s 95% 0% - 81% 23 0 0 0 0 0 0
19% 3226 0 0 3226 13340 161935 166164 0 0 0 0s 96% 0% - 83% 0 0 0 0 0 0 0
36% 2388 0 0 2388 8945 138074 157052 42580 0 0 1 98% 41% Tf 84% 0 0 0 0 0 0 0
21% 2046 0 0 2046 5482 131457 167128 121088 0 0 0s 94% 100% :f 89% 0 0 0 0 0 0 0
32% 3232 0 0 3668 10094 202315 212984 115824 0 0 0s 94% 100% :f 82% 436 0 0 0 0 0 0
27% 3157 0 0 3173 7040 216534 220044 116224 0 0 55s 96% 100% :f 81% 16 0 0 0 0 0 0
28% 3746 0 0 3752 5845 245167 252088 125328 0 0 0s 96% 100% :f 82% 6 0 0 0 0 0 0
26% 3020 0 0 3020 5884 200317 205844 61052 0 0 57s 96% 66% : 85% 0 0 0 0 0 0 0
31% 2980 0 0 3001 13137 183224 186476 0 0 0 0s 95% 0% - 90% 21 0 0 0 0 0 0
25% 2905 0 0 3480 14162 163218 163084 24 0 0 0s 96% 0% - 84% 575 0 0 0 0 0 0
33% 2123 0 0 2308 13284 124891 156168 78696 0 0 59s 97% 46% Sf 95% 185 0 0 0 0 0 0
25% 3029 0 0 3035 5532 200730 203496 113984 0 0 0s 93% 100% :f 86% 6 0 0 0 0 0 0
29% 3385 0 0 3386 5786 217468 234453 130938 0 0 1 97% 99% Zs 83% 1 0 0 0 0 0 0
19% 2645 0 0 2645 9259 129553 140667 69682 0 0 0s 97% 36% : 92% 0 0 0 0 0 0 0