Tiered storage performance metrics
Storage tier metrics allow drilling down into specific storage tiers for a table to monitor the data distribution.
Storage tier metrics allow drilling down into specific storage tiers for a table to monitor the data distribution.
To view a storage metric, a table and tier number must be specified. DSE identifies tiers
by number. Zero represents the tier with the newest data. The number increases by one for
each older tier.
Note: An additional implicit tier exists that represents the oldest data.
For instance, if
max_tier_ages
for a table is set to
60,120
, there are three tiers: Tier 0 would be for data newer than 60
seconds, tier 1 would be for data between 60 seconds and 120 seconds, and tier 2 would be
for data older than 120 seconds.For more information, see DSE Tiered Storage.
- TIER: Max Data Age [cf-tier-max-data-age]
- Timestamp in local server time that represents an upper bound to the newest piece of data stored in the SSTable. When a new SSTable is flushed, it is set to the time of creation. When an SSTable is created from compaction, it is set to the max of all merged SSTables.
- TIER: sstables [cf-tier-sstables]
- Number of SSTables in a tier for a table.
- TIER: Total Disk Used [cf-tier-size]
- Disk space used by a table by SSTables for the tier.