RDB vs AOF comparison in Redis - Interactive Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to specify the Redis persistence method that saves snapshots of the dataset at intervals.

Redis

redis.conf setting for periodic snapshot saving is [1]

Drag options to blanks, or click blank then click option'

Asave

Bmaxmemory

Cappendonly

Dtimeout

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing 'appendonly' with snapshot saving

Using 'maxmemory' which controls memory limits

The save directive in Redis config sets intervals for RDB snapshots.

2fill in blank

medium

Complete the code to enable the Redis append-only file persistence.

Redis

To enable AOF, set appendonly to [1] in redis.conf

Drag options to blanks, or click blank then click option'

Ayes

Bno

Cauto

Doff

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'no' or 'off' disables AOF

Using 'auto' is not a valid value

Setting appendonly yes enables AOF persistence in Redis.

3fill in blank

hard

Fix the error in the command to rewrite the AOF file.

Redis

Use the command [1] to rewrite the appendonly.aof file safely.

Drag options to blanks, or click blank then click option'

AFLUSHALL

BBGREWRITEAOF

CBGSAVE

DSAVE

Attempts:

3 left

💡 Hint

Common Mistakes

Using SAVE or BGSAVE which only affect RDB files

Using FLUSHALL which clears all data

BGREWRITEAOF triggers a background rewrite of the AOF file to reduce its size.

4fill in blank

hard

Fill both blanks to complete the Redis config lines for RDB and AOF persistence.

Redis

save [1]
appendonly [2]

Drag options to blanks, or click blank then click option'

A900 1

Byes

Cno

D300 10

Attempts:

3 left

💡 Hint

Common Mistakes

Putting 'no' for appendonly disables AOF

Using invalid save intervals

The save 900 1 means save snapshot if 1 change in 900 seconds.
The appendonly yes enables AOF persistence.

5fill in blank

hard

Fill all three blanks to complete the Redis config for AOF fsync policy and RDB snapshot interval.

Redis

appendonly [1]
appendfsync [2]
save [3]

Drag options to blanks, or click blank then click option'

Ayes

Beverysec

C900 1

Dno

Attempts:

3 left

💡 Hint

Common Mistakes

Setting appendonly to no disables AOF

Using 'always' or 'no' for appendfsync instead of 'everysec'

Enable AOF with appendonly yes, set fsync every second with appendfsync everysec, and save RDB snapshot every 900 seconds if 1 change with save 900 1.