Applies to ONTAP 9 Description An alternative method of staggering dedupe processes automatically, based on thresholds. Dedupe runs only if X% of data has actually changed in the volume. This helps en...Applies to ONTAP 9 Description An alternative method of staggering dedupe processes automatically, based on thresholds. Dedupe runs only if X% of data has actually changed in the volume. This helps ensure dedupe is processing new data and has the useful side-effect of auto-staggering the dedupe schedule. Do not use auto schedules if latency is a concern when deduplication jobs are active
Applies to ONTAP 9 Volume efficiency (deduplication) Issue A volume may show stale fingerprints in excess of 20%: Cluster01::*> volume efficiency show -vserver svm1 -volume vol1 Vserver Name: svm1 Vol...Applies to ONTAP 9 Volume efficiency (deduplication) Issue A volume may show stale fingerprints in excess of 20%: Cluster01::*> volume efficiency show -vserver svm1 -volume vol1 Vserver Name: svm1 Volume Name: vol1 Volume Path: /vol/vol1 State: Enabled Status: Active Stale Fingerprint Percentage: 24
Applies to ONTAP 9 Issue Client applications, such as databases or hypervisors, report a high amount of space used in a volume. ONTAP df output shows far less space used.
Volume with efficiency policy set to auto Volume efficiency (deduplication) operations run but do not complete for volumes with the auto efficiency policy and changelog usage over the default threshol...Volume with efficiency policy set to auto Volume efficiency (deduplication) operations run but do not complete for volumes with the auto efficiency policy and changelog usage over the default threshold of 20%. A volume efficiency show command gives output similar to the following: Cluster01::> volume efficiency show -vserver svm1 -volume vol1 -instance Notice no errors are being reported, the changelog usage is 91% and that the operation is being executed very frequently, but doing nothing.
When SIDL is enabled on data aggregates, enabling inline dedupe or compression will cause performance issues since CPU cycles needed for SIDL. SIDL is enabled for increase of write performance by skip...When SIDL is enabled on data aggregates, enabling inline dedupe or compression will cause performance issues since CPU cycles needed for SIDL. SIDL is enabled for increase of write performance by skipping NVRAM and writing data only once onto disk directly. To check the SIDL status, from Cluster CLI run command aggregate show -aggregate <<aggregate_name> and check the Enable SIDL key Enable SIDL: on Amount of Shared bytes count by Storage Efficiency: 0B Enable Aggregate level Encryption: false
Applies to System Manager 9.8 ONTAP 9 Storage Efficiency Issue The capacity panel on System Manager's dashboard page reports much more logical space used than the ONTAP CLI For example, the capacity p...Applies to System Manager 9.8 ONTAP 9 Storage Efficiency Issue The capacity panel on System Manager's dashboard page reports much more logical space used than the ONTAP CLI For example, the capacity panel could show 75TB of logical data, while a volume show -fields logical-used command does not add to anywhere near this amount
