cassandra tag

6 questions


1 answers
393 views
0
Understanding the nodetool cfhistograms Command

For information on how to display nodetool cfhistograms, see I understand that statistics for the past 15 minutes will be displayed.Which of the following is this last 15 minutes?·Statistics 15 minute...

2 years ago

1 answers
93 views
0
Minimum value of Cassandratombstone_threshold

Could you please let me know the minimum value of Tombstone_threshold for Cassandra?I'm troubled because I can't judge even by looking at the manual.Try until 0.01I was able to confirm that it is vali...

2 years ago

1 answers
76 views
0
Reproducing the sstable File Configuration to Another Keyspace by sstableloader

This is the Cassandra 3.0 environment.For testing, I would like to replicate the sstable file in one keyspace to another keyspace and test the compaction.With sstableloader, I thought it would be poss...

2 years ago

1 answers
70 views
0
Cassandra DB user data size estimation (per table)

Regarding the estimation of the disk usage of the table in Cassandra DB3.0.I would estimate the size of the partition using the following two formulas.Nv = Nr Nc-Npk-Ns + NsIn this case, since it is a...

2 years ago

1 answers
93 views
0
Information About the Disk Usage Estimation for the Secondary Index in Cassandra 3.x

I am having trouble estimating the disk usage for the secondary index of Cassandra 3.x.Tyler Hobbs, commissioner of DataStax, responded to 0.7 as follows:Their size will throughly be: (cardinity of th...

2 years ago

1 answers
91 views
0
Understanding cqerl's Cassandra_nodes Option

I am using the cqerl link below (using the latest master).https://github.com/matehat/cqerlIn the source code, connect to the casandra as follows:cqerl:new_client({host1,port1},[])The document stated t...

2 years ago

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