Memcached::cas (PECLmemcached>=0.1.0) Memcached::cas—Compareandswapanitem Description publicboolMemcached
apcu_cas (PECLapcu>=4.0.0) apcu_cas-用新值更新旧值 描述 boolapcu_cas(string$key,int$old,int$new) 如果old参数匹配当前存储的值和
apc_cas (PECLapc>=3.1.1) apc_cas-用新值更新旧值 描述 boolapc_cas(string$key,int$old,int$new) 如果old参数匹配当前存储的值和new
Memcached::casByKey—Compareandswapanitemonaspecificserver Description publicboolMemcached::casByKey(float$cas_token
::getDelayed—Requestmultipleitems Description publicboolMemcached::getDelayed(array$keys[,bool$with_cas
getDelayedByKey—Requestmultipleitemsfromaspecificserver Description publicboolMemcached::getDelayedByKey(string$server_key,array$keys[,bool$with_cas
,string$value) publicboolappendByKey(string$server_key,string$key,string$value) publicboolcas(float$cas_token
Note:Beforev3.0asecondargument&cas_tokenswasinuse.ItwasfilledwiththeCAStokenvaluesforthefounditems.The
Theaboveexamplewilloutputsomethingsimilarto: array(3){["key"]=>string(3)"int""value"]=>int(99)["cas
Theaboveexamplewilloutput: array(2){[0]=>array(3){["key"]=>string(3)"int"["value"]=>int(99)["cas
ReturnValues 总是返回TRUE 也可以看看 apc_cache_info()-从APC的数据存储中检索缓存的信息 ←apc_cas apc_compile_file→
Appenddatatoanexistingitem Memcached::prepend()-Prependdatatoanexistingitem ←Memcached::append Memcached::cas
returnstheitemthatwaspreviouslystoredunderthekey.IftheitemisfoundandforflagsisgivenMemcached::GET_EXTENDED,itwillreturntheCAStokenvaluefortheitem.SeeMemcached::cas
(参考FLP不可能性定理和Raft共识算法论文) 通过领导人选举过程相互排斥 集群成员资格管理 全球一致的对象排序和CAS(比较和交换)基元 docker,容器,集群,swarm,raft 根据ApacheLicense
如果忽略这个参数,将会使用"root"CAs,比如VeriSign。用来授权连接。