How can you determine the effective compression ratio on a share basis and determine the impact
on performance?
A.
You cannot. You can only see the effective compression ratio on a pool basis- Performance
can be evaluated via Analytics.
B.
Edit the share in question. The compression ratio will be shown on the left under static
Properties. Performance impact of compression can be evaluated by comparing the throughput of
two benchmarking runs with and without compression enabled.
C.
Click Shares. The compression ratio for each share will be shown on the left under UsagePerformance impact of compression can be determined by selecting Analytics: Add statistic: Disk –
> I/O operations -> broken down by share -> compression efficiency.
D.
Both the effective compression ratio and compression overhead are reported within Analytics.
Explanation:
Compression ratio
If compression is enabled, this shows the compressions ratio currently achieved for the share.
This is expressed as a multiplier. For example, a compression of 2x means that the data is
consuming half as much space as the uncompressed contents.
Compression ratio
See the shares section for a complete description.
Beforechoosing a compression algorithm, it is recommended that you perform any necessary
performance tests and measure the achieved compression ratio.Sun ZFS Storage 7000 System Administration Guide,Data compression