Steven Lowenthal created CASSANDRA-5766:
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Summary: The output of the describe command does not necessarily
give you the right DDL to re-create the CF
Key: CASSANDRA-5766
URL: https://issues.apache.org/jira/browse/CASSANDRA-5766
Project: Cassandra
Issue Type: Bug
Components: Tools
Affects Versions: 2.1
Reporter: Steven Lowenthal
If compression is not set for a CF, cqlsh omits the compression attribute.
When you replay that very same DDL, you get a CF with Snappy compression. This
may occur with other parameters. Perhaps describe should always show every
parameter in full. The absence of a setting is a setting. (Think of the arrow
in the FedEx logo).
Create a CF with cassandra-stress. cassandra-stress defaults to NO compression.
~/dse/resources/cassandra/tools/bin/cassandra-stress -S 100 -c 1 --num-keys 1
describe it
CREATE TABLE "Standard1" (
key blob PRIMARY KEY,
"C0" blob
) WITH COMPACT STORAGE AND
bloom_filter_fp_chance=0.010000 AND
caching='KEYS_ONLY' AND
comment='' AND
dclocal_read_repair_chance=0.000000 AND
gc_grace_seconds=864000 AND
read_repair_chance=0.100000 AND
replicate_on_write='true' AND
populate_io_cache_on_flush='false' AND
compaction={'class': 'SizeTieredCompactionStrategy'};
replay it - I changed the cf name to standard2
describe the new CF:
CREATE TABLE standard2 (
key blob PRIMARY KEY,
"C0" blob
) WITH COMPACT STORAGE AND
bloom_filter_fp_chance=0.010000 AND
caching='KEYS_ONLY' AND
comment='' AND
dclocal_read_repair_chance=0.000000 AND
gc_grace_seconds=864000 AND
read_repair_chance=0.100000 AND
replicate_on_write='true' AND
populate_io_cache_on_flush='false' AND
compaction={'class': 'SizeTieredCompactionStrategy'} AND
compression={'sstable_compression': 'SnappyCompressor'};
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