als = ALS(maxIter=10, rank=10, regParam=0.01, userCol="member_srl", itemCol="productid", ratingCol="rating", seed=123)
(training, test) = df.randomSplit([0.8, 0.2])
model = als.fit(training)
pred = model.transform(test)
得到的pred一直在变。比如pred.count()每次都有波动。是集群的问题吗 谢谢