We ran wafl awa to determine that our FP was undersized. We had the option of obtaining Flash Cache cards, and I thought, without rearching enough, the the two combined would help. We only have one large data aggr per controller and they are both FP hybrids. It sounds like I should return the FC cards and expand the FP SSDs.
ntap-cl01::> system node run -node * "priv set advanced;wafl awa print"
2 entries were acted on.
Node: ntap-cl01-node01
Warning: These advanced commands are potentially dangerous; use
them only when directed to do so by NetApp
personnel.
### FP AWA Stats ###
Host ntap-cl01-node01 Memory 20166 MB
ONTAP Version NetApp Release 8.2.2 Cluster-Mode: Fri Aug 22 01:46:52 PDT 2014
AWA Version 1
Layout Version 1
CM Version 1
Basic Information
Aggregate aggr_data_node01
Current-time Wed Jan 14 09:08:03 EST 2015
Start-time Tue Jan 13 13:51:56 EST 2015
Total runtime (sec) 69368
Interval length (sec) 600
Total intervals 116
In-core Intervals 1024
Summary of the past 116 intervals
max
Read Throughput 300.948 MB/s
Write Throughput 28.250 MB/s
Cacheable Read (%) 65 %
Cacheable Write (%) 27 %
Max Projected Cache Size 1168 GiB
Projected Read Offload 16 %
Projected Write Offload 27 %
Summary Cache Hit Rate vs. Cache Size
Size 20% 40% 60% 80% 100%
Read Hit 9 10 12 13 16
Write Hit 23 24 24 24 27
The entire results and output of Automated Workload Analyzer (AWA) are
estimates. The format, syntax, CLI, results and output of AWA may
change in future Data ONTAP releases. AWA reports the projected cache
size in capacity. It does not make recommendations regarding the
number of data SSDs required. Please follow the guidelines for
configuring and deploying Flash Pool; that are provided in tools and
collateral documents. These include verifying the platform cache size
maximums and minimum number and maximum number of data SSDs.
### FP AWA Stats End ###
Node: ntap-cl01-node02
Warning: These advanced commands are potentially dangerous; use
them only when directed to do so by NetApp
personnel.
### FP AWA Stats ###
Host ntap-cl01-node02 Memory 20166 MB
ONTAP Version NetApp Release 8.2.2 Cluster-Mode: Fri Aug 22 01:46:52 PDT 2014
AWA Version 1
Layout Version 1
CM Version 1
Basic Information
Aggregate aggr_data_node02
Current-time Wed Jan 14 09:08:03 EST 2015
Start-time Tue Jan 13 13:51:47 EST 2015
Total runtime (sec) 69376
Interval length (sec) 600
Total intervals 116
In-core Intervals 1024
Summary of the past 116 intervals
max
Read Throughput 301.032 MB/s
Write Throughput 38.832 MB/s
Cacheable Read (%) 83 %
Cacheable Write (%) 34 %
Max Projected Cache Size 1423 GiB
Projected Read Offload 39 %
Projected Write Offload 35 %
Summary Cache Hit Rate vs. Cache Size
Size 20% 40% 60% 80% 100%
Read Hit 24 28 31 32 39
Write Hit 30 31 31 31 35
The entire results and output of Automated Workload Analyzer (AWA) are
estimates. The format, syntax, CLI, results and output of AWA may
change in future Data ONTAP releases. AWA reports the projected cache
size in capacity. It does not make recommendations regarding the
number of data SSDs required. Please follow the guidelines for
configuring and deploying Flash Pool; that are provided in tools and
collateral documents. These include verifying the platform cache size
maximums and minimum number and maximum number of data SSDs.
### FP AWA Stats End ###