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From "Aleksey Yeschenko (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-4996) After changing the compaction strategy, compression_strategy always returning back to the "SnappyCompressor" through CQL 2.2.0
Date Mon, 10 Dec 2012 18:31:22 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-4996?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Aleksey Yeschenko updated CASSANDRA-4996:
-----------------------------------------

    Reviewer: jbellis
    
> After changing the compaction strategy, compression_strategy  always returning back to
the "SnappyCompressor" through CQL 2.2.0
> -------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-4996
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-4996
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>    Affects Versions: 1.1.5
>            Reporter: Shamim Ahmed
>            Assignee: Aleksey Yeschenko
>            Priority: Trivial
>             Fix For: 1.1.8
>
>         Attachments: 4996-1.1.txt
>
>
> faced very strange behaviour when changing compression_parameters of exisiting CF. After
changing the compaction strategy, compression_strategy returning back to the "SnappyCompressor".
> Using cassandra version 1.1.5.
> [cqlsh 2.2.0 | Cassandra 1.1.5 | CQL spec 2.0.0 | Thrift protocol 19.32.0]
> I have one column family with following paramters:
> cqlsh > describe columnfamily auditlog_01;
> CREATE TABLE auditlog_01 (
> lid text PRIMARY KEY,
> dscn text,
> asid text,
> soapa text
> ) 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
> compaction_strategy_options:sstable_size_in_mb='5' AND
> compression_parameters:sstable_compression='SnappyCompressor';
> Changing compression strategy to 'DeflateCompressor
> cqlsh> ALTER TABLE auditlog_01 WITH compression_parameters:sstabl
> e_compression = 'DeflateCompressor' AND compression_parameters:chunk_length_kb =
>  64;
> cqlsh> describe columnfamily auditlog_01;
> CREATE TABLE auditlog_01 (
> lid text PRIMARY KEY,
> dscn text,
> asid text,
> soapa text
> ) 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
>   compaction_strategy_options:sstable_size_in_mb='5' AND
>   compression_parameters:chunk_length_kb='64' AND
>   compression_parameters:sstable_compression='DeflateCompressor';
> it's sucessfuly changed the compression strategy to 'DeflateCompressor, after that when
i am trying to change the compaction strategy, compression strategy returing back to "SnappyCompressor".
> cqlsh> alter table auditlog_01 with compaction_strategy_class='Le
> veledCompactionStrategy' AND compaction_strategy_options:sstable_size_in_mb=5;
> cqlsh> describe columnfamily auditlog_01;
> CREATE TABLE auditlog_01 (
>   lid text PRIMARY KEY,
> dscn text,
> asid text,
> soapa text
> ) 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
>   compaction_strategy_options:sstable_size_in_mb='5' AND
>   compression_parameters:sstable_compression='SnappyCompressor';

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