Shamim Ahmed created CASSANDRA-4996:
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Summary: 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
Priority: Trivial
Fix For: 1.1.7
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:p00smev_archKS> ALTER TABLE auditlog_01 WITH compression_parameters:sstabl
e_compression = 'DeflateCompressor' AND compression_parameters:chunk_length_kb =
64;
cqlsh:p00smev_archKS> 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:p00smev_archKS> alter table auditlog_01 with compaction_strategy_class='Le
veledCompactionStrategy' AND compaction_strategy_options:sstable_size_in_mb=5;
cqlsh:p00smev_archKS> 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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