I am new to Cassandra, in this example I am using a cluster with 1 DC and 5 nodes and NetworkTopologyStrategy with a replication ratio of 3.
Keyspace: activityfeed
Read Count: 0
Read Latency: NaN ms.
Write Count: 0
Write Latency: NaN ms.
Pending Tasks: 0
Table: feed_shubham
SSTable count: 1
Space used (live), bytes: 52620684
Space used (total), bytes: 52620684
SSTable Compression Ratio: 0.3727660543119897
Number of keys (estimate): 137984
Memtable cell count: 0
Memtable data size, bytes: 0
Memtable switch count: 0
Local read count: 0
Local read latency: 0.000 ms
Local write count: 0
Local write latency: 0.000 ms
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 174416
Compacted partition minimum bytes: 771
Compacted partition maximum bytes: 924
Compacted partition mean bytes: 924
Average live cells per slice (last five minutes): 0.0
Average tombstones per slice (last five minutes): 0.0
What does the number of keys mean? I have 5 different nodes in my cluster, and after running the command below on each node separately, I get different statistics for the same table.
nodetool cfstats -h 192.168.1.12 activityfeed.feed_shubham
According to the above result, I can interpret that cfstats gives me statistics regarding the physical storage of data on each node.
And I went through the following document
http://www.datastax.com/documentation/cassandra/2.0/cassandra/tools/toolsCFstats.html
But I did not find an explanation of the number of keys there.
I am using RandomPartitioner.
Is this key something related to the partition key?
200000 .