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From aaron morton <aa...@thelastpickle.com>
Subject Re: Enable compression Cassandra 1.1.2
Date Wed, 14 Nov 2012 21:09:32 GMT
May be https://issues.apache.org/jira/browse/CASSANDRA-4561

Can you upgrade to 1.1.6 ? 

Cheers

-----------------
Aaron Morton
Freelance Cassandra Developer
New Zealand

@aaronmorton
http://www.thelastpickle.com

On 14/11/2012, at 11:39 PM, Alain RODRIGUEZ <arodrime@gmail.com> wrote:

> Hi, I am running C* 1.1.2 and there is no way to turn the compression on for a CF.
> 
> Here is the command I ran in the CLI:
> 
> UPDATE COLUMN FAMILY data_action WITH compression_options={sstable_compression:SnappyCompressor,
chunk_length_kb : 64};
> 
> Show schema :
> 
> create column family data_action
>   with column_type = 'Standard'
>   and comparator = 'UTF8Type'
>   and default_validation_class = 'UTF8Type'
>   and key_validation_class = 'UTF8Type'
>   and read_repair_chance = 1.0
>   and dclocal_read_repair_chance = 0.0
>   and gc_grace = 864000
>   and min_compaction_threshold = 4
>   and max_compaction_threshold = 32
>   and replicate_on_write = true
>   and compaction_strategy = 'org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy'
>   and caching = 'KEYS_ONLY';
> 
> I tried also through cqlsh without success ("ALTER TABLE data_action WITH compression_parameters:sstable_compression
= 'SnappyCompressor' AND compression_parameters:chunk_length_kb = 64;")
> 
> I have no error message just these few lines on system.log:
> 
> INFO 10:17:12,051 Completed flushing /raid0/cassandra/data/system/schema_columnfamilies/system-schema_columnfamilies-hd-20-Data.db
(1367 bytes) for commitlog position ReplayPosition(segmentId=721932060965088, position=116556860)
>  INFO 10:17:12,052 Compacting [SSTableReader(path='/raid0/cassandra/data/system/schema_columnfamilies/system-schema_columnfamilies-hd-20-Data.db'),
SSTableReader(path='/raid0/cassandra/data/system/schema_columnfamilies/system-schema_columnfamilies-hd-19-Data.db'),
SSTableReader(path='/raid0/cassandra/data/system/schema_columnfamilies/system-schema_columnfamilies-hd-17-Data.db'),
SSTableReader(path='/raid0/cassandra/data/system/schema_columnfamilies/system-schema_columnfamilies-hd-18-Data.db')]
>  INFO 10:17:12,134 Compacted to [/raid0/cassandra/data/system/schema_columnfamilies/system-schema_columnfamilies-hd-21-Data.db,].
 50,928 to 46,827 (~91% of original) bytes for 3 keys at 0.544606MB/s.  Time: 82ms.
> 
> I also tried upgrading sstables but compression is definitely not enabled (same size
of data + JMX show a CompressionRatio of 0.0).
> 
> Does anyone already saw something similar ?
> 
> Alain


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