# 高频常见问题
#### 产品咨询
- [GeminiDB Redis和开源Redis、其他开源Redis云服务有什么区别？](https://support.huaweicloud.com/redisug-nosql/redis_faq_0002.html)
- [和开源Redis相比，GeminiDB Redis性能如何？](https://support.huaweicloud.com/redisug-nosql/redis_faq_0065.html)
- [GeminiDB Redis兼容Redis哪些版本，兼容哪些命令，客户端连接是否需要修改](https://support.huaweicloud.com/redisug-nosql/redis_faq_0011.html)
- [自建Redis是否可以搬迁至GeminiDB Redis，需要注意什么](https://support.huaweicloud.com/redisug-nosql/redis_faq_0067.html)
- [GeminiDB Redis实例总容量是总内存吗，内存和容量之间是什么联系](https://support.huaweicloud.com/redisug-nosql/redis_faq_0068.html)
- [购买GeminiDB Redis实例时，如何选择合适的节点规格和节点数量？](https://support.huaweicloud.com/redisug-nosql/redis_faq_0010.html)
- [购买x GB的GeminiDB Redis的实例，优选主备还是集群？](https://support.huaweicloud.com/redisug-nosql/redis_faq_0071.html)
- [GeminiDB Redis持久化机制是怎样的，会丢数据吗](https://support.huaweicloud.com/redisug-nosql/redis_faq_0075.html)
- [GeminiDB Redis的内存淘汰策略是什么](https://support.huaweicloud.com/redisug-nosql/redis_faq_0076.html)
- [GeminiDB Redis是否支持布隆过滤器等modules](https://support.huaweicloud.com/redisug-nosql/redis_faq_0078.html)
 
#### 数据库连接
- [如何接入GeminiDB Redis](https://support.huaweicloud.com/redisug-nosql/redis_faq_0015.html)
- [如何使用GeminiDB Redis提供的多个节点IP地址](https://support.huaweicloud.com/redisug-nosql/redis_faq_0016.html)
- [GeminiDB Redis提供的ELB的实现方式是怎样的](https://support.huaweicloud.com/redisug-nosql/redis_faq_0017.html)
- [GeminiDB Redis实例购买成功后是否支持更换VPC](https://support.huaweicloud.com/redisug-nosql/redis_faq_0019.html)
- [内网如何访问GeminiDB Redis](https://support.huaweicloud.com/redisug-nosql/redis_faq_0105.html)
- [GeminiDB Redis自带的负载均衡地址是否能绑定公网IP？如何通过公网连接GeminiDB Redis实例？](https://support.huaweicloud.com/redisug-nosql/redis_faq_0106.html)
- [设置了安全组，还需要设置负载均衡内网访问控制吗？](https://support.huaweicloud.com/redisug-nosql/redis_faq_0109.html)
- [绑定了弹性公网IP但是连接不上数据库](https://support.huaweicloud.com/redisug-nosql/redis_faq_0102.html)
- [常见客户端报错及解决方法](https://support.huaweicloud.com/redisug-nosql/redis_faq_0104.html)
 
#### 数据库使用
- [scan指定match参数，数据中确实存在匹配的key，为什么返回的是空](https://support.huaweicloud.com/redisug-nosql/redis_faq_0009.html)
- [业务侧原本做了数据分片，切换到GeminiDB Redis后如何处理这部分逻辑](https://support.huaweicloud.com/redisug-nosql/redis_faq_0013.html)
- [如何处理报错：CROSSSLOT Keys in request don't hash to the same slot](https://support.huaweicloud.com/redisug-nosql/redis_faq_0054.html)
- [GeminiDB Redis存储扩容需要多久，对业务有影响吗？](https://support.huaweicloud.com/redisug-nosql/redis_faq_0203.html)
- [GeminiDB Redis多个节点同时扩容需要多长时间，对业务影响如何？](https://support.huaweicloud.com/redisug-nosql/redis_faq_0204.html)
- [GeminiDB Redis规格变更包含的在线变更和离线变更有什么区别，通常需要多长时间，对业务有哪些影响？](https://support.huaweicloud.com/redisug-nosql/redis_faq_0205.html)
- [GeminiDB Redis版本补丁升级包含的在线升级和离线升级有什么区别，通常需要多长时间，对业务有哪些影响？](https://support.huaweicloud.com/redisug-nosql/redis_faq_0206.html)
- [GeminiDB Redis备份文件是否可以下载到本地，是否支持线下恢复数据](https://support.huaweicloud.com/redisug-nosql/redis_faq_0207.html)
- [GeminiDB Redis数据备份工作机制是怎样的，对业务有哪些影响？](https://support.huaweicloud.com/redisug-nosql/redis_faq_0208.html)
- [购买GeminiDB Redis 1U\*2节点特惠型实例后，业务访问量比较少，但CPU占用率比较高，是什么原因？](https://support.huaweicloud.com/redisug-nosql/redis_faq_0209.html)
- [GeminiDB Redis监控面板上key数量下降又恢复至正常数量是什么原因？](https://support.huaweicloud.com/redisug-nosql/redis_faq_0210.html)
- [GeminiDB Redis节点CPU偶发冲高，可能是哪些原因](https://support.huaweicloud.com/redisug-nosql/redis_faq_0211.html)
- [GeminiDB Redis集群版实例中，哪些命令需要使用hashtag](https://support.huaweicloud.com/redisug-nosql/redis_faq_0200.html)
- [如何处理报错：CROSSSLOT Keys in request don't hash to the same slot](https://support.huaweicloud.com/redisug-nosql/redis_faq_0054.html)
- [如何处理报错"ERR unknown command sentinel"](https://support.huaweicloud.com/redisug-nosql/redis_faq_0201.html)
 
#### 备份与恢复
[GeminiDB Redis实例能够保存多长时间的备份](https://support.huaweicloud.com/redisug-nosql/redis_faq_0021.html)
#### 数据迁移
- [4.0、5.0以及6.2版本的自建Redis能迁移至GeminiDB Redis吗？](https://support.huaweicloud.com/redisug-nosql/redis_faq_0214.html)
- [自建Redis主备、集群实例如何迁移到GeminiDB Redis?](https://support.huaweicloud.com/redisug-nosql/redis_faq_0215.html)
- [为什么阿里云Redis、腾讯云Redis等云服务不能使用DRS进行数据迁移？](https://support.huaweicloud.com/redisug-nosql/redis_faq_0216.html)
- [自建主备Redis，迁移到GeminiDB Redis集群，需要考虑哪些因素？](https://support.huaweicloud.com/redisug-nosql/redis_faq_0217.html)
- [迁移完成后数据量变少了，100GB的数据迁移到GeminiDB Redis只有20-30GB，数据是不是没迁移完？](https://support.huaweicloud.com/redisug-nosql/redis_faq_0218.html)