背景：
阿里云的dts不支持前缀匹配迁移。
调研发现RedisShake可以前缀匹配迁移。
https://github.com/tair-opensource/RedisShake
proxy 代理模式
阿里云的redis cluster 默认是proxy 代理模式， 不支持增量迁移。
如果要支持增量迁移需要开启 redis cluster 的直连模式。 （和阿里沟通 开启关闭 直连模式对现有应用无影响）
和开发沟通，业务不需要增量迁移，增量数据可以忽略。
因为不能增量迁移 采用了 rump 模式。
恢复（restore）：将 RDB 文件恢复到目标Redis数据库。
备份（dump）：将源 Redis 的全量数据通过RDB文件备份起来。
解析（decode）：读取 RDB 文件，并以 JSON 格式解析存储。
同步（sync）：支持源redis和目的redis的数据同步，支持全量和增量数据的迁移，支持从云下到阿里云云上的同步，也支持云下到云下不同环境的同步，支持单节点、主从版、集群版之间的互相同步。
同步（rump）：支持源 Redis 和目的 Redis 的数据同步，仅支持全量迁移。采用scan和restore命令进行迁移，支持不同云厂商不同redis版本的迁移。
rump 模式 关键参数
conf.version = 1
id = redis-shake
log.file = /xxxx/redis-shake/logs/redis-shake.log
log.level = info
system_profile = 9310
http_profile = 9320
parallel = 5
source.type = proxy
source.address = r-xxx.redis.rds.aliyuncs.com:6379
source.password_raw =xxx
source.auth_type = auth
target.type = proxy
target.address = r-ddd.redis.rds.aliyuncs.com:6379
target.password_raw = xxx
target.auth_type = auth
target.db = -1
#key_exists = none
key_exists = rewrite
filter.db.whitelist = 0
# 配置
filter.key.whitelist = YUEYUE_LEOPARD_ADS_showURLV1_
keep_alive = 0
# 配置拉去数据qps
qps = 10000
启动命令
./redis-shake.linux -conf ./redis-shake.conf -type rump
迁移用时
扫描了1千万的key ，过滤了1.2w数据
7分钟
filter.key.blacklis 排查前缀
支持按前缀过滤key，不让指定前缀的key通过，分号分隔。比如指定abc，将会阻塞abc, abc1, abcxxx
filter.key.blacklist =
默认配置文档
# This file is the configuration of redis-shake.
# If you have any problem, please visit: https://github.com/alibaba/RedisShake/wiki/FAQ
# 有疑问请先查阅：https://github.com/alibaba/RedisShake/wiki/FAQ
# current configuration version, do not modify.
# 当前配置文件的版本号，请不要修改该值。
conf.version = 1
# id
id = redis-shake
# The log file name, if left blank, it will be printed to stdout,
# otherwise it will be printed to the specified file.
# 日志文件名，留空则会打印到 stdout，否则打印到指定文件。
# for example:
# log.file =
# log.file = /var/log/redis-shake.log
log.file =
# log level: "none", "error", "warn", "info", "debug".
# default is "info".
# 日志等级，可选：none error warn info debug
# 默认为：info
log.level = info
# 进程文件存储目录，留空则会输出到当前目录,
# 注意这个是目录，真正生成的 pid 是 {pid_path}/{id}.pid
# 例如：
# pid_path = ./
# pid_path = /var/run/
pid_path =
# pprof port.
system_profile = 9310
# restful port, set -1 means disable, in `restore` mode RedisShake will exit once finish restoring RDB only if this value
# is -1, otherwise, it'll wait forever.
# restful port, 查看 metric 端口, -1 表示不启用. 如果是`restore`模式，只有设置为-1才会在完成RDB恢复后退出，否则会一直block。
# http://127.0.0.1:9320/conf 查看 redis-shake 使用的配置
# http://127.0.0.1:9320/metric 查看 redis-shake 的同步情况
http_profile = 9320
# parallel routines number used in RDB file syncing. default is 64.
# 启动多少个并发线程同步一个RDB文件。
parallel = 32
# source redis configuration.
# used in `dump`, `sync` and `rump`.
# source redis type, e.g. "standalone" (default), "sentinel" or "cluster".
# 1. "standalone": standalone db mode.
# 2. "sentinel": the redis address is read from sentinel.
# 3. "cluster": the source redis has several db.
# 4. "proxy": the proxy address, currently, only used in "rump" mode.
# used in `dump`, `sync` and `rump`.
# 源端 Redis 的类型，可选：standalone sentinel cluster proxy
# 注意：proxy 只用于 rump 模式。
source.type = standalone
# ip:port
# the source address can be the following:
# 1. single db address. for "standalone" type.
# 2. ${sentinel_master_name}:${master or slave}@sentinel single/cluster address, e.g., mymaster:master@127.0.0.1:26379;127.0.0.1:26380, or @127.0.0.1:26379;127.0.0.1:26380. for "sentinel" type.
# 3. cluster that has several db nodes split by semicolon(;). for "cluster" type. e.g., 10.1.1.1:20331;10.1.1.2:20441.
# 4. proxy address(used in "rump" mode only). for "proxy" type.
# 源redis地址。对于sentinel或者开源cluster模式，输入格式为"master名字:拉取角色为master或者slave@sentinel的地址"，别的cluster
# 架构，比如codis, twemproxy, aliyun proxy等需要配置所有master或者slave的db地址。
# 源端 redis 的地址
# 1. standalone 模式配置 ip:port, 例如: 10.1.1.1:20331
# 2. cluster 模式需要配置所有 nodes 的 ip:port, 例如: source.address = 10.1.1.1:20331;10.1.1.2:20441
source.address = 127.0.0.1:20441
# source password, left blank means no password.
# 源端密码，留空表示无密码。
source.password_raw =
# auth type, don't modify it
source.auth_type = auth
# tls enable, true or false. Currently, only support standalone.
# open source redis does NOT support tls so far, but some cloud versions do.
source.tls_enable = false
# Whether to verify the validity of the redis certificate, true means verification, false means no verification
source.tls_skip_verify = false
# input RDB file.
# used in `decode` and `restore`.
# if the input is list split by semicolon(;), redis-shake will restore the list one by one.
# 如果是decode或者restore，这个参数表示读取的rdb文件。支持输入列表，例如：rdb.0;rdb.1;rdb.2
# redis-shake将会挨个进行恢复。
source.rdb.input =
# the concurrence of RDB syncing, default is len(source.address) or len(source.rdb.input).
# used in `dump`, `sync` and `restore`. 0 means default.
# This is useless when source.type isn't cluster or only input is only one RDB.
# 拉取的并发度，如果是`dump`或者`sync`，默认是source.address中db的个数，`restore`模式默认len(source.rdb.input)。
# 假如db节点/输入的rdb有5个，但rdb.parallel=3，那么一次只会
# 并发拉取3个db的全量数据，直到某个db的rdb拉取完毕并进入增量，才会拉取第4个db节点的rdb，
# 以此类推，最后会有len(source.address)或者len(rdb.input)个增量线程同时存在。
source.rdb.parallel = 0
# for special cloud vendor: ucloud
# used in `decode` and `restore`.
# ucloud集群版的rdb文件添加了slot前缀，进行特判剥离: ucloud_cluster。
source.rdb.special_cloud =
# target redis configuration. used in `restore`, `sync` and `rump`.
# the type of target redis can be "standalone", "proxy" or "cluster".
# 1. "standalone": standalone db mode.
# 2. "sentinel": the redis address is read from sentinel.
# 3. "cluster": open source cluster (not supported currently).
# 4. "proxy": proxy layer ahead redis. Data will be inserted in a round-robin way if more than 1 proxy given.
# 目的redis的类型，支持standalone，sentinel，cluster和proxy四种模式。
target.type = standalone
# ip:port
# the target address can be the following:
# 1. single db address. for "standalone" type.
# 2. ${sentinel_master_name}:${master or slave}@sentinel single/cluster address, e.g., mymaster:master@127.0.0.1:26379;127.0.0.1:26380, or @127.0.0.1:26379;127.0.0.1:26380. for "sentinel" type.
# 3. cluster that has several db nodes split by semicolon(;). for "cluster" type.
# 4. proxy address. for "proxy" type.
target.address = 127.0.0.1:6379
# target password, left blank means no password.
# 目的端密码，留空表示无密码。
target.password_raw =
# auth type, don't modify it
target.auth_type = auth
# all the data will be written into this db. < 0 means disable.
target.db = -1
# Format: 0-5;1-3 ,Indicates that the data of the source db0 is written to the target db5, and
# the data of the source db1 is all written to the target db3.
# Note: When target.db is specified, target.dbmap will not take effect.
# 例如 0-5;1-3 表示源端 db0 的数据会被写入目的端 db5, 源端 db1 的数据会被写入目的端 db3
# 当 target.db 开启的时候 target.dbmap 不会生效.
target.dbmap =
# tls enable, true or false. Currently, only support standalone.
# open source redis does NOT support tls so far, but some cloud versions do.
target.tls_enable = false
# Whether to verify the validity of the redis certificate, true means verification, false means no verification
target.tls_skip_verify = false
# output RDB file prefix.
# used in `decode` and `dump`.
# 如果是decode或者dump，这个参数表示输出的rdb前缀，比如输入有3个db，那么dump分别是:
# ${output_rdb}.0, ${output_rdb}.1, ${output_rdb}.2
target.rdb.output = local_dump
# some redis proxy like twemproxy doesn't support to fetch version, so please set it here.
# e.g., target.version = 4.0
target.version =
# use for expire key, set the time gap when source and target timestamp are not the same.
# 用于处理过期的键值，当迁移两端不一致的时候，目的端需要加上这个值
fake_time =
# how to solve when destination restore has the same key.
# rewrite: overwrite.
# none: panic directly.
# ignore: skip this key. not used in rump mode.
# used in `restore`, `sync` and `rump`.
# 当源目的有重复 key 时是否进行覆写, 可选值:
# 1. rewrite: 源端覆盖目的端
# 2. none: 一旦发生进程直接退出
# 3. ignore: 保留目的端key，忽略源端的同步 key. 该值在 rump 模式下不会生效.
key_exists = none
# filter db, key, slot, lua.
# filter db.
# used in `restore`, `sync` and `rump`.
# e.g., "0;5;10" means match db0, db5 and db10.
# at most one of `filter.db.whitelist` and `filter.db.blacklist` parameters can be given.
# if the filter.db.whitelist is not empty, the given db list will be passed while others filtered.
# if the filter.db.blacklist is not empty, the given db list will be filtered while others passed.
# all dbs will be passed if no condition given.
# 指定的db被通过，比如0;5;10将会使db0, db5, db10通过, 其他的被过滤
filter.db.whitelist =
# 指定的db被过滤，比如0;5;10将会使db0, db5, db10过滤，其他的被通过
filter.db.blacklist =
# filter key with prefix string. multiple keys are separated by ';'.
# e.g., "abc;bzz" match let "abc", "abc1", "abcxxx", "bzz" and "bzzwww".
# used in `restore`, `sync` and `rump`.
# at most one of `filter.key.whitelist` and `filter.key.blacklist` parameters can be given.
# if the filter.key.whitelist is not empty, the given keys will be passed while others filtered.
# if the filter.key.blacklist is not empty, the given keys will be filtered while others passed.
# all the namespace will be passed if no condition given.
# 支持按前缀过滤key，只让指定前缀的key通过，分号分隔。比如指定abc，将会通过abc, abc1, abcxxx
filter.key.whitelist =
# 支持按前缀过滤key，不让指定前缀的key通过，分号分隔。比如指定abc，将会阻塞abc, abc1, abcxxx
filter.key.blacklist =
# filter given slot, multiple slots are separated by ';'.
# e.g., 1;2;3
# used in `sync`.
# 指定过滤slot，只让指定的slot通过
filter.slot =
# filter give commands. multiple commands are separated by ';'.
# e.g., "flushall;flushdb".
# used in `sync`.
# at most one of `filter.command.whitelist` and `filter.command.blacklist` parameters can be given.
# if the filter.command.whitelist is not empty, the given commands will be passed while others filtered.
# if the filter.command.blacklist is not empty, the given commands will be filtered.
# besides, the other config caused filters also effect as usual, e.g. filter.lua = true would filter lua commands.
# all the commands, except the other config caused filtered commands, will be passed if no condition given.
# 只让指定命令通过，分号分隔
filter.command.whitelist =
# 不让指定命令通过，分号分隔
# 除了这些指定的命令外，其他配置选项指定的过滤命令也会照常生效，如开启 filter.lua 将会过滤 lua 相关命令
filter.command.blacklist =
# filter lua script. true means not pass. However, in redis 5.0, the lua
# converts to transaction(multi+{commands}+exec) which will be passed.
# 控制不让lua脚本通过，true表示不通过
filter.lua = false
# big key threshold, the default is 500 * 1024 * 1024 bytes. If the value is bigger than
# this given value, all the field will be spilt and write into the target in order. If
# the target Redis type is Codis, this should be set to 1, please checkout FAQ to find
# the reason.
# 正常key如果不大，那么都是直接调用restore写入到目的端，如果key对应的value字节超过了给定
# 的值，那么会分批依次一个一个写入。如果目的端是Codis，这个需要置为1，具体原因请查看FAQ。
# 如果目的端大版本小于源端，也建议设置为1。
big_key_threshold = 524288000
# enable metric
# used in `sync`.
# 是否启用metric
metric = true
# print in log
# 是否将metric打印到log中
metric.print_log = false
# sender information.
# sender flush buffer size of byte.
# used in `sync`.
# 发送缓存的字节长度，超过这个阈值将会强行刷缓存发送
sender.size = 104857600
# sender flush buffer size of oplog number.
# used in `sync`. flush sender buffer when bigger than this threshold.
# 发送缓存的报文个数，超过这个阈值将会强行刷缓存发送，对于目的端是cluster的情况，这个值
# 的调大将会占用部分内存。
sender.count = 4095
# delay channel size. once one oplog is sent to target redis, the oplog id and timestamp will also
# stored in this delay queue. this timestamp will be used to calculate the time delay when receiving
# ack from target redis.
# used in `sync`.
# 用于metric统计时延的队列
sender.delay_channel_size = 65535
# enable keep_alive option in TCP when connecting redis.
# the unit is second.
# 0 means disable.
# TCP keep-alive保活参数，单位秒，0表示不启用。
keep_alive = 0
# used in `rump`.
# number of keys captured each time. default is 100.
# 每次scan的个数，不配置则默认100.
scan.key_number = 50
# used in `rump`.
# we support some special redis types that don't use default `scan` command like alibaba cloud and tencent cloud.
# 有些版本具有特殊的格式，与普通的scan命令有所不同，我们进行了特殊的适配。目前支持腾讯云的集群版"tencent_cluster"
# 和阿里云的集群版"aliyun_cluster"，注释主从版不需要配置，只针对集群版。
scan.special_cloud =
# used in `rump`.
# we support to fetching data from given file which marks the key list.
# 有些云版本，既不支持sync/psync，也不支持scan，我们支持从文件中进行读取所有key列表并进行抓取：一行一个key。
scan.key_file =
# limit the rate of transmission. Only used in `rump` currently.
# e.g., qps = 1000 means pass 1000 keys per second. default is 500,000(0 means default)
qps = 200000
# enable resume from break point, please visit xxx to see more details.
# 断点续传开关
resume_from_break_point = false
# ----------------splitter----------------
# below variables are useless for current open source version so don't set.
# replace hash tag.
# used in `sync`.
replace_hash_tag = false
参考：
https://developer.aliyun.com/article/783138
https://zhuanlan.zhihu.com/p/597319519
https://zhuanlan.zhihu.com/p/404215310
https://tair-opensource.github.io/RedisShake/zh/guide/introduction.html
https://support.huaweicloud.com/migration-dcs/dcs-migrate-demo02.html