Server temporarily suspended and 4 months of data lost

[PCPisChill]

2 days ago my host suspended my server for having "20k+ UNREPLIED conntrack sessions", when I contacted them they unsuspected it and I logged in to the server to find it rebooted. I started everything up, and noticed that the data redis was using was almost 4 months old (from when I first setup the server).

I had the default save config

save 900 1
save 300 10
save 60 10000

appendonly was off, but I've since turned it on with appendfsync everysec. locate *.rdb only finds the /var/lib/redis/dump.rdb and locate *.aof only finds the newly created /var/lib/redis/appendonly.aof

Checking the logs from a week ago up until 2 days ago when the server was suspended, I don't see any DB saved on disk in the logs like I do in my most recent one after re-setting everything up, it consists entirely of this:

10899:S 20 Jan 01:02:03.578 # Error condition on socket for SYNC: Connection refused
10899:S 20 Jan 01:02:04.434 * Connecting to MASTER IP:PORT
10899:S 20 Jan 01:02:04.435 * MASTER <-> SLAVE sync started
10899:S 20 Jan 01:02:04.583 # Error condition on socket for SYNC: Connection refused
10899:S 20 Jan 01:02:05.444 * Connecting to MASTER IP:PORT
10899:S 20 Jan 01:02:05.444 * MASTER <-> SLAVE sync started

with 1 10899:S 28 Jan 00:08:40.426 # Timeout connecting to the MASTER...

When re-setting everything up I did re-chown and re-chmod /var/lib/redis and dump.rdb so maybe that was the issue? or could have it of been something else?

[ArkayZheng]

Hello @PCPisChill
1 It seems like your slave node have problem connecting your master node. So please check the slaveof IP:PORT and masterauth in redis.conf on your slave node.
2 The log information DB saved on disk will not show out at once when persistence is triggered. You can set loglevel debug for more information or read the source code: int rdbSave in rdb.c.
3 Usually persistence can be triggered by these items: new data\MASTER <-> SLAVE sync\exit in the correct way. So make sure that you have done at least one of them successfully.
Hope these would help a little.