我在为大型 cassandra 1.1.2 cf 激活行级缓存时遇到了一些问题：
如果我跑
update column family user_data with caching = 'ALL';
（无论我是否使用引号）
它说
515b08ac-89c5-3890-bcc1-60bf55f0228a
Waiting for schema agreement...
... schemas agree across the cluster
但之后，缓存似乎仍然关闭。我也在配置文件中激活了它。描述还说它已关闭：
create column family user_data
with column_type = 'Standard'
and comparator = 'UTF8Type'
and default_validation_class = 'BytesType'
and key_validation_class = 'UTF8Type'
and read_repair_chance = 0.1
and dclocal_read_repair_chance = 0.0
and gc_grace = 864000
and min_compaction_threshold = 4
and max_compaction_threshold = 32
and replicate_on_write = true
and compaction_strategy = 'org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy'
and caching = 'KEYS_ONLY'
and column_metadata = [
{column_name : 'content',
validation_class : BytesType}]
and compression_options = {'sstable_compression' : 'org.apache.cassandra.io.compress.SnappyCompressor'};
使用 CQL 更新它（ALTER TABLE user_data WITH caching='all';）也不起作用。