Here's a fun one that Alex Rice just brought to my attention:
Starting with a new bucket, I have bucket properties like so:
{"props":{"search":false,"allow_mult":false,"basic_quorum":false,"big_vclock":50,"chash_keyfun":{"mod":"riak_core_util","fun":"chash_std_keyfun"},"dw":"quorum","last_write_wins":false,"linkfun":{"mod":"riak_kv_wm_link_walker","fun":"mapreduce_linkfun"},"n_val":3,"name":"players","notfound_ok":true,"old_vclock":86400,"postcommit":[],"pr":0,"precommit":[],"pw":0,"r":"quorum","rw":"quorum","small_vclock":50,"w":"quorum","young_vclock":20}}
Setting allow_mult = true and last_write_wins = false results in the following:
{"props":{"allow_mult":true,"basic_quorum":false,"big_vclock":50,"chash_keyfun":{"mod":"riak_core_util","fun":"chash_std_keyfun"},"dw":"quorum","last_write_wins":false,"linkfun":{"mod":"riak_kv_wm_link_walker","fun":"mapreduce_linkfun"},"n_val":3,"name":"players","notfound_ok":true,"old_vclock":86400,"postcommit":[],"pr":0,"precommit":[],"pw":0,"r":1,"rw":"quorum","search":false,"small_vclock":50,"w":1,"young_vclock":20}}
So far so good, right?
Flipping the values around so that allow_mult = false and LWW = true
actually ends up with allow_mult = true and LWW = true:
{"props":{"allow_mult":true,"basic_quorum":false,"big_vclock":50,"chash_keyfun":{"mod":"riak_core_util","fun":"chash_std_keyfun"},"dw":"quorum","last_write_wins":true,"linkfun":{"mod":"riak_kv_wm_link_walker","fun":"mapreduce_linkfun"},"n_val":3,"name":"players","notfound_ok":true,"old_vclock":86400,"postcommit":[],"pr":0,"precommit":[],"pw":0,"r":1,"rw":"quorum","search":false,"small_vclock":50,"w":1,"young_vclock":20}}
Resetting bucket properties at this point puts the bucket back where
it should be.
Is this behavior expected or have I missed something subtle?
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Jeremiah Peschka - Founder, Brent Ozar Unlimited
MCITP: SQL Server 2008, MVP
Cloudera Certified Developer for Apache Hadoop
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