Setting bucket priority
To set the disk I/O priority for a bucket, use the couchbase-cli tool bucket-create or bucket-edit command and the --bucket-priority=[low|high] option.
Creating a bucket and setting high priority
To create a new couchbase bucket with high priority:
couchbase-cli bucket-create -c 192.168.0.1:8091 \\
--bucket=test_bucket \\
--bucket-type=couchbase \\
--bucket-port=11222 \\
--bucket-ramsize=200 \\
--bucket-replica=1 \\
--bucket-priority=high \\
-u Administrator -p password
Setting high priority
To modify a bucket to high priority:
couchbase-cli bucket-edit -c 192.168.0.1:8091 \\
--bucket=test_bucket \\
--bucket-priority=high \\
-u Administrator -p password