I need to load a dump.rdb file to a redis cluster instance. How to do it?
While I am keeping in data directory and trying to start the instance alone (say 11211) is flushing my rdb and new rdb file is written. Even by turning the appendonly to no.
Got it.
Stop all redis instance (because redis overwrites the current rdb file when it exits).
do the below steps in master instance.
Copy your backup rdb file to the redis working directory (this is the dir option in your redis config). Also make sure your backup filename matches the dbfilename config option.
Change the redis config appendonly flag to no (otherwise redis will ignore your rdb file when it starts).
Start redis.
Run redis-cli BGREWRITEAOF to create a new appendonly file.
Restore redis config appendonly flag to yes.
Related
I have a requirement to dynamically turn on appendonly setting after redis replayed all the data from backup file dump.rdb. So is there any redis-cli cmd to know that redis has loaded all the data from dump.rdb snapshot?#
When Redis is loading RDB files, it refuses most commands, e.g. PING. So you can send a PING command, i.e. redis-cli ping, to Redis. If it returns PONG, Redis has already loaded all data. If Redis is still loading, it returns an error reply.
I have configured my redis cluster with the following config:
appendonly no
save ""
But I found out that my redis is taking a back up and has taken a backup recently. My use case doesn't require any rdb save to be done. Am I missing some thing?
For disable all backups in redis go to redis.conf file do the following:
Comment all save directives, by default there are three of them.
save 900 1
save 300 10
save 60 10000
Disable appendonly (set appendonly to no)
I have enabled both aof and rdb in my redis server. Redis will save the two files appendonly.aof and dump.rdb on the disk. How can I use environment variables to control the path of these two files?
AFAIK, Redis DOES NOT read these configuration from environment variables.
You CAN config these paths in the redis.conf file, or use the CONFIG SET command to dynamically set these paths.
The corresponding configuration keys are: dir, dbfilename and appendfilename.
NOTE: it seems that, by now, appendfilename is NOT supported to be dynamically changed with CONFIG SET command.
I installed Redis on Ubuntu 16.04. I couldn't find Redis directory nor redis.conf file (tried with: sudo find redis.conf).
My application depends on some data pulled from third party APIs. I store the (processed) data in Redis. My problem is, after reboot I lose the data. I guess I need to specify in config file that the data should be persisted on reboot, but I couldn't find the config file. Do I need to create the config file? Are there some templates to use? My goal is just to have the data persisted after reboot.
Thank you!
Use dpkg -L redis-server | grep redis.conf to find config file path. It should be located at /etc/redis/redis.conf as I know.
Redis has 2 methods for persistense: Snapshotting and Append-only file:
Snapshotting will be enabled by adding (or uncommenting) save X Y in config file. It means Redis will automatically dump the dataset to disk every X seconds if at least Y keys changed. There could be more than one save options in config file.
Append-only file will be enabled by adding (or uncommenting) appendonly yes in config file
you should turn on the rdb or aof.
see https://redis.io/topics/persistence
Add this to the config file.
appendonly yes
This will append data as you store new data. This enables durability.
I configured a Redis instance to operate only in memory (no data are dumped to a persistent storage) by commenting out the save commands:
################################ SNAPSHOTTING ################################
# save 900 1
# save 300 10
# save 60 10000
Now when I start my instance, Redis checks if there is any data the file dump.rdb. If yes, then it loads the data and the execution continues only in-memory.
Is there a way for me to load previous data from appendonly.aof (append only mode) and then continue only in an "in-memory only mode"?
No - AOF loading upon startup (unlike RDB) is done if and only if appendonly is not set to no. What you could do, as a workaround, is set appendonly to yes in the redis.conf file and once the server is up and running issue a CONFIG SET appendonly no to turn it off.