cassandra-commits mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Jonathan Ellis (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-3511) Supercolumn key caches are not saved
Date Sat, 10 Dec 2011 20:15:40 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-3511?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13166967#comment-13166967
] 

Jonathan Ellis commented on CASSANDRA-3511:
-------------------------------------------

Note that this is not a cache saving issue, but a cache population one.
                
> Supercolumn key caches are not saved
> ------------------------------------
>
>                 Key: CASSANDRA-3511
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-3511
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>    Affects Versions: 1.0.2, 1.0.3
>            Reporter: Radim Kolar
>            Priority: Minor
>              Labels: supercolumns
>
> 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.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira

        

Mime
View raw message