ZooKeeper Observers Observers: Scaling ZooKeeper Without Hurting Write Performance How to use Observers Example use cases Observers: Scaling ZooKeeper Without Hurting Write Performance Although ZooKeeper performs very well by having clients connect d…
本文转载:https://blog.csdn.net/han_cui/article/details/54767208?tdsourcetag=s_pcqq_aiomsg 解决 Redis 只读不可写的问题在 Redis 终端上进行读写操作,发现只读不可写,GET 操作是正常的,SET 操作提示错误:(error)MISCONF Redis is configured to save RDB snapshots,but is currently not able to persist on di…
Of course, like any technology MongoDB has its strengths and weaknesses. MongoDB is designed for OLTP workloads. It can do complex queries, but it’s not necessarily the best fit for reporting-style workloads. Or if you need complex transactions, it’s…
Indexes 和全部db一样,索引肯定都会引起写性能的下降,mongodb也没啥特别的,相对索引对读性能的提示,这些消耗通常是能够接受的,所以该加入的索引还是要加入.当然须要慎重一些.扯点远的,以前我碰到过一个case.由于一个表的索引数量太多,导致兴许磁盘的util越来越高,达到70%.而刚加入的副本集成员磁盘uitl才20%不到. 后来发现是由于索引太多.越到后面造成的索引碎片也就越来越多.后来的处理方法是定期都挨个重做副本集的成员. Document Growth and the MMA…