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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (CASSANDRA-4597) Impossible to set LeveledCompactionStrategy to a column family.
Date Fri, 31 Aug 2012 12:18:07 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-4597?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13445864#comment-13445864
] 

Jonathan Ellis edited comment on CASSANDRA-4597 at 8/31/12 11:16 PM:
---------------------------------------------------------------------

Several schema bugs have been fixed since 1.1.1.  Let us know if you can reproduce in 1.1.4.
 You may need to recreate the schema because 1.1.1 used an incorrectly-high timestamp on the
original creation.
                
      was (Author: jbellis):
    Several schema bugs have been fixed since 1.1.  Let us know if you can reproduce in 1.1.4.
 You may need to recreate the schema because 1.1.1 used an incorrectly-high timestamp on the
original creation.
                  
> Impossible to set LeveledCompactionStrategy to a column family. 
> ----------------------------------------------------------------
>
>                 Key: CASSANDRA-4597
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-4597
>             Project: Cassandra
>          Issue Type: Bug
>    Affects Versions: 1.1.1
>         Environment: Ubuntu 12.04
> cqlsh 2.2.0 | Cassandra 1.1.1 | CQL spec 3.0.0 | Thrift protocol 19.32.0
> Cluster with only 1 node
>            Reporter: jal
>
> CFPropDefs.applyToCFMetadata() does not set the compaction class on CFM
> When altering the compaction strategy of a column family to LeveledCompactionStrategy,
the compaction strategy is not changed (the describe command shows that the SizeTieredCompactionStrategy
is still set to the CF)
> When creating a column family WITH compaction_strategy_class='LeveledCompactionStrategy',
the compaction strategy class used is  SizeTieredCompactionStrategy
> Ex : 
> jal@jal-VirtualBox:~/cassandra/apache-cassandra-1.1.1/bin$ ./cqlsh -3
> Connected to Test Cluster at localhost:9160.
> [cqlsh 2.2.0 | Cassandra 1.1.1 | CQL spec 3.0.0 | Thrift protocol 19.32.0]
> Use HELP for help.
> cqlsh> use test1;
> cqlsh:test1> describe table pns_credentials;
> CREATE TABLE pns_credentials (
>   ise text PRIMARY KEY,
>   isnew int,
>   ts timestamp,
>   mergestatus int,
>   infranetaccount text,
>   user_level int,
>   msisdn bigint,
>   mergeusertype int
> ) WITH
>   comment='' AND
>   comparator=text AND
>   read_repair_chance=0.100000 AND
>   gc_grace_seconds=864000 AND
>   default_validation=text AND
>   min_compaction_threshold=4 AND
>   max_compaction_threshold=32 AND
>   replicate_on_write='true' AND
>   compaction_strategy_class='SizeTieredCompactionStrategy' AND
>   compression_parameters:sstable_compression='SnappyCompressor';
> I want to set the LeveledCompaction strategy for this table, so I execute the following
ALTER TABLE :
> cqlsh:test1> alter table pns_credentials 
>          ... WITH compaction_strategy_class='LeveledCompactionStrategy'
>          ... AND compaction_strategy_options:sstable_size_in_mb=10;
> In Cassandra logs, I see some informations :
>  INFO 10:23:52,532 Enqueuing flush of Memtable-schema_columnfamilies@965212657(1391/1738
serialized/live bytes, 20 ops)
>  INFO 10:23:52,533 Writing Memtable-schema_columnfamilies@965212657(1391/1738 serialized/live
bytes, 20 ops)
>  INFO 10:23:52,629 Completed flushing /var/lib/cassandra/data/system/schema_columnfamilies/system-schema_columnfamilies-hd-94-Data.db
(1442 bytes) for commitlog position ReplayPosition(segmentId=3556583843054, position=1987)
> However, when I look at the description of the table, the table is still with the SizeTieredCompactionStrategy
> cqlsh:test1> describe table pns_credentials ;
> CREATE TABLE pns_credentials (
>   ise text PRIMARY KEY,
>   isnew int,
>   ts timestamp,
>   mergestatus int,
>   infranetaccount text,
>   user_level int,
>   msisdn bigint,
>   mergeusertype int
> ) WITH
>   comment='' AND
>   comparator=text AND
>   read_repair_chance=0.100000 AND
>   gc_grace_seconds=864000 AND
>   default_validation=text AND
>   min_compaction_threshold=4 AND
>   max_compaction_threshold=32 AND
>   replicate_on_write='true' AND
>   compaction_strategy_class='SizeTieredCompactionStrategy' AND
>   compression_parameters:sstable_compression='SnappyCompressor';
>  
> In the schema_columnfamilies table (in system keyspace), the table pns_credentials is
still using the SizeTieredCompactionStrategy
> cqlsh:test1> use system;
> cqlsh:system> select * from schema_columnfamilies ;
> ...
>          test1 |   pns_credentials |                   null | KEYS_ONLY |           
            [] |         | org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy
|                          {} |                                                          
                                                                                         
                      org.apache.cassandra.db.marshal.UTF8Type | {"sstable_compression":"org.apache.cassandra.io.compress.SnappyCompressor"}
|          org.apache.cassandra.db.marshal.UTF8Type |           864000 | 1029 |       ise
|     org.apache.cassandra.db.marshal.UTF8Type |                        0 |              
        32 |                        4 |                0.1 |               True |        
 null | Standard |        null
> ... 
> Same behaviour using cqlsh or command-cli.

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