Recent questions tagged Cassandra

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cassandra - Are there any performance penalties when using a TEXT as a Primary Key?

If yes, what would the data model look like if I want to have a unique TEXT field? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cassandra - Query results not ordered despite WITH CLUSTERING ORDER BY

I am storing posts from all users in table. I want to retrieve post from all users the user is following. CREATE ... am using Cassandra 2.0.10. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cassandra - CQL: Unable to Null Check in "Where" Clause

Try to return all rows where a specific field is null or not null. select * from ADDRESS where addr1 = null; or select ... 1.1.1 & Java 1.7_05 See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cassandra - specify cqlsh output timezone

I have a table in cassandra with a datatype of timestamp. i am using cqlsh to get data out of the database and ... | CQL spec 3.1.1 Thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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528 views

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cassandra - Mutation of 17076203 bytes is too large for the maxiumum size of 16777216

I have "commitlog_segment_size_in_mb: 32" in the cassandra settings but the error below indicates maximum size is 16777216, ... [na:1.7.0_67] See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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480 views

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cassandra - Difference between Thrift and CQL 3 Columns/Rows

At the Cassandra Summit, it was mentioned that Thrift and CQL 3 have subtle differences in their definitions of ... related to this topic. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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354 views

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cassandra - Does collections in CQL3 have certain limits?

As there are two ways to support wide rows in CQL3..One is to use composite keys and another is to use ... 2 billion columns in a row) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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432 views

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cassandra - Does collections in CQL3 have certain limits?

As there are two ways to support wide rows in CQL3..One is to use composite keys and another is to use ... 2 billion columns in a row) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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318 views

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cassandra - Spark Datastax Java API Select statements

I'm using a tutorial here in this Github to run spark on cassandra ... org.apache.spark.scheduler.DAGScheduler$$anonfun$start$1$$anon$2$$anonfun$receive$1.applyOrElse(DAGSche...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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596 views

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cassandra - how do i know if nodetool repair is finished

I have a 2 node apache cassandra (2.0.3) cluster with rep factor of 1. I change rep factor to 2 using ... repair' is finished in this case? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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375 views

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cassandra - Advantages of using cql over thrift

Are there any distinct advantages for using cql over thrift or is it simply a case of developers being too used to ... doing so. What are they? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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357 views

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cassandra - Does an UPDATE become an implied INSERT

For Cassandra, do UPDATEs become an implied INSERT if the selected row does not exist? That is, if I say ... CQL3, Cassandra version 1.2+. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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370 views

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cassandra - SELECT Specific Value from map

I am trying to create a WIDE Column Table, 20,000+ columns Initially I was thinking I would use: CREATE ... do I need a different approach? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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706 views

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cassandra - Saved cluster name Test Cluster != configured name

How am I supposed to bot a new Cassandra node when I get this error? INFO [SSTableBatchOpen:1] 2014-02-25 ... 'thisisstupid' How do I resolve? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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