Issue on docs

[Reallyone]

Path:/zh-CN/docs/install/deploy-manually/integrated-storage-compute-deploy-manually

执行：CREATE TABLE testdb.table_hash ( k1 TINYINT, k2 DECIMAL(10, 2) DEFAULT "10.5", k3 VARCHAR(10) COMMENT "string column", k4 INT NOT NULL DEFAULT "1" COMMENT "int column" ) COMMENT "my first table" DISTRIBUTED BY HASH(k1) BUCKETS 32;

提示：ERROR 1105 (HY000): errCode = 2, detailMessage = replication num should be less than the number of available backends. replication num is 3, available backend num is 2