Hi! I want to understand how incrementing of counter works.
- I have a 3 node ring,
- I use FailoverPolicy.FAIL_FAST,
- RF is 2,
I have the following counter column family
ColumnFamily: tk_counters
Key Validation Class: org.apache.cassandra.db.marshal.CompositeType(
org.apache.cassandra.db.marshal.UTF8Type,org.apache.cassandra.db.marshal.
UUIDType)
Default column value validator: org.apache.cassandra.db.marshal.
CounterColumnType
Columns sorted by: org.apache.cassandra.db.marshal.UTF8Type
Row cache size / save period in seconds / keys to save : 0.0/0/all
Row Cache Provider: org.apache.cassandra.cache.
SerializingCacheProvider
Key cache size / save period in seconds: 0.0/14400
GC grace seconds: 864000
Compaction min/max thresholds: 4/32
Read repair chance: 1.0
Replicate on write: true
Bloom Filter FP chance: default
Built indexes: []
Compaction Strategy:
org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy
My CL for this column family is Write=2, Read=1.
When I increment a counter (using hector mutator), and execute returns
without errors, what is the status of the nodes at that stage.
Can execute return before the nodes are really updated? So that if a read
is done immediately after the increment it will still read the previous
values?
Thanks,
*Tamar Fraenkel *
Senior Software Engineer, TOK Media
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ta...@tok-media.com
Tel: +972 2 6409736
Mob: +972 54 8356490
Fax: +972 2 5612956
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