Defining Cassandra Materialized Views

The following properties are applicable to a Cassandra Materialized View object.

Tab

Property

Description

Additional Information
General Physical Name Specifies the physical name of the materialized view  
Caching Keys Specifies whether primary keys or rows are cached

Valid values:

ALL: Indicates that all the primary keys or rows are cached

NONE: Indicates that no primary keys or rows are cached
Caching Rows Per Partition Specifies the number of rows to cache in each partition  
Bloom Filter Fp Chance Specifies the false positive probability for SSTable bloom filters  
Dclocal Read Repair Chance Specifies the probability of a successful read operation initiating a read repair This read repair is confined to replicas in the local data center as the coordinator.
Default Time To Live Specifies the default TTL (Time to Live) of the view in seconds  
Gc Grace Seconds Specifies the time interval in seconds between marking of data with a tombstone and the instance when data is eligible for garbage collection  
Maximum Index Interval Specifies the maximum possible sampling interval of the index  
Minimum Index Interval Specifies the minimum possible sampling interval of the index  
Memtable Flush Period(ms) Specifies the time period in milliseconds before memtables associated with the view are flushed  
Read Repair Chance Specifies the probability of a successful read operation initiating a read repair This read repair is not confined to replicas in the local data center as the coordinator.
Speculative Retry Specifies the rapid read protection configuration This property sets the trigger for extra read requests.
CDC Specifies whether change data capture logs should be created for the materialized view

True: Indicates that the change data capture logs should be created

False: Indicates that the change data capture logs should not be created
SSTable Compression Specifies whether compression is disabled  
Compaction Compaction Class Strategy Specifies the compaction strategy

Size Tiered Strategy: Indicates that compaction is initiated when Cassandra accumulates required number of similar sized SSTables

Date Tiered Strategy: Indicates that Cassandra compacts based on SSTable age

Time Window Strategy: Indicates that Cassandra compacts based on the SSTable maximum timestamp

Leveled Strategy: Indicates that the Cassandra compacts based on a series of levels L0, L1, L2, and so on
Compaction Class Specifies the compaction class  
Bucket High Specifies the bucket_high size in KB

Two SSTables occupy same bucket if their size is between average_size * bucket_low and average_size * bucket_high.

Available when Compaction Class Strategy is set to Size Tiered Strategy
Bucket Low Specifies the bucket_low size in KB
Background Enabled Specifies whether the background compaction is enabled Available when Compaction Class Strategy is set to Size Tiered Strategy, Date Tiered Strategy, or Leveled Strategy
Maximum Threshold Specifies the maximum number of SSTables allowed in a minor compaction Available when Compaction Class Strategy is set to Size Tiered Strategy or Date Tiered Strategy
Minimum Threshold Specifies the minimum number of SSTables required to initiate a minor compaction Available when Compaction Class Strategy is set to Size Tiered Strategy or Date Tiered Strategy
SSTable Size(MB) Specifies the target size for SSTables Available when Compaction Class Strategy is set to Leveled Strategy
Minimum SSTable Size(MB) Specifies the SSTable size threshold in MB such that the SSTables smaller than this are added in the same bucket Available when Compaction Class Strategy is set to Size Tiered Strategy
Only Purge Repaired Tombstones Specifies whether to purge tombstones only if data has been repaired Available when Compaction Class Strategy is set to Size Tiered Strategy
Tombstone Interval Specifies the minimum time in seconds between SSTable creation and its tombstone compaction Available when Compaction Class Strategy is set to Size Tiered Strategy, Date Tiered Strategy, or Leveled Strategy
Tombstone Threshold Specifies the minimum ratio (garbage-collectable tombstones to all contained columns) required to initiate tombstone compaction on the materialized view Available when Compaction Class Strategy is set to Size Tiered Strategy, Date Tiered Strategy, or Leveled Strategy
Unchecked Tombstone Specifies whether to run tombstone compaction on the view without checking its eligibility Available when Compaction Class Strategy is set to Size Tiered Strategy, Date Tiered Strategy, or Leveled Strategy
Base Time Seconds Specifies the size of the first time window Available when Compaction Class Strategy is set to Date Tiered Strategy
Maximum SSTable Age Days Specifies the age of the most recent data in number of days over which compaction is not run on SSTables Available when Compaction Class Strategy is set to Date Tiered Strategy
Maximum Window Size Seconds Specifies the maximum window size in seconds Available when Compaction Class Strategy is set to Date Tiered Strategy
Timestamp Resolution Specifies time units in microseconds or milliseconds to resolve timestamp of inserted data Available when Compaction Class Strategy is set to Date Tiered Strategy
Window Unit Specifies a Java TimeUnit to define bucket size Available when Compaction Class Strategy is set to Time Window Strategy
Window Size Specifies the number of units per bucket Available when Compaction Class Strategy is set to Time Window Strategy
Compression Compression Class Specifies the compressor algorithm name  
Compression Chunk Length(KB) Specifies the compression block size in KB  
Crc Check Chance Specifies the probability of checking block checksums during read Block checksum detects disk bitrot and prohibits replica corruption