Key caches are not saved
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Key: CASSANDRA-3511
URL: https://issues.apache.org/jira/browse/CASSANDRA-3511
Project: Cassandra
Issue Type: Bug
Affects Versions: 1.0.2, 1.0.3
Reporter: Radim Kolar
Priority: Minor
cache saving seems to be broken in 1.0.2 and 1.0.3 i have 2 CF in keyspace with
enabled cache saving and only one gets its key cache saved. It worked perfectly
in 0.8, both were saved.
This one works:
create column family query2
with column_type = 'Standard'
and comparator = 'AsciiType'
and default_validation_class = 'BytesType'
and key_validation_class = 'UTF8Type'
and rows_cached = 500.0
and row_cache_save_period = 0
and row_cache_keys_to_save = 2147483647
and keys_cached = 200000.0
and key_cache_save_period = 14400
and read_repair_chance = 1.0
and gc_grace = 864000
and min_compaction_threshold = 5
and max_compaction_threshold = 10
and replicate_on_write = false
and row_cache_provider = 'ConcurrentLinkedHashCacheProvider'
and compaction_strategy =
'org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy'
This does not
create column family dkb13
with column_type = 'Super'
and comparator = 'LongType'
and subcomparator = 'AsciiType'
and default_validation_class = 'BytesType'
and key_validation_class = 'UTF8Type'
and rows_cached = 600.0
and row_cache_save_period = 0
and row_cache_keys_to_save = 2147483647
and keys_cached = 200000.0
and key_cache_save_period = 14400
and read_repair_chance = 1.0
and gc_grace = 864000
and min_compaction_threshold = 5
and max_compaction_threshold = 10
and replicate_on_write = false
and row_cache_provider = 'ConcurrentLinkedHashCacheProvider'
and compaction_strategy =
'org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy'
in second test system i created these 2 column families and none of them got
single cache key saved. Both have save period 30 seoonds - their cache should
save often. Its not that standard column family works while super does not.
create column family test1
with column_type = 'Standard'
and comparator = 'BytesType'
and default_validation_class = 'BytesType'
and key_validation_class = 'BytesType'
and rows_cached = 0.0
and row_cache_save_period = 0
and row_cache_keys_to_save = 2147483647
and keys_cached = 200000.0
and key_cache_save_period = 30
and read_repair_chance = 1.0
and gc_grace = 864000
and min_compaction_threshold = 4
and max_compaction_threshold = 32
and replicate_on_write = true
and row_cache_provider = 'SerializingCacheProvider'
and compaction_strategy =
'org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy';
create column family test2
with column_type = 'Standard'
and comparator = 'BytesType'
and default_validation_class = 'BytesType'
and key_validation_class = 'BytesType'
and rows_cached = 0.0
and row_cache_save_period = 0
and row_cache_keys_to_save = 2147483647
and keys_cached = 200000.0
and key_cache_save_period = 30
and read_repair_chance = 1.0
and gc_grace = 864000
and min_compaction_threshold = 4
and max_compaction_threshold = 32
and replicate_on_write = true
and row_cache_provider = 'SerializingCacheProvider'
and compaction_strategy =
'org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy';
If this is done on purpose for example cassandra 1.0 is doing some heuristic
decision if cache should be saved or not then it should be removed. Saving
cache is fast.
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