NDB 集群支持将 NDB 表的非索引列存储在磁盘上,而不是存储在 RAM 中。列数据和日志元数据保存在数据文件和撤销日志文件中,概念上作为表空间和日志文件组,如下一节所述 —— 参见 第 25.6.11.1 节,“NDB 集群磁盘数据对象”。NDB Cluster supports storing nonindexed columns of
NDB tables on disk, rather than in
RAM. Column data and logging metadata are kept in data files and
undo log files, conceptualized as tablespaces and log file groups,
as described in the next section—see
Section 25.6.11.1, “NDB Cluster Disk Data Objects”.
NDB 集群磁盘数据性能可能受到多种配置参数的影响。有关这些参数及其影响的信息,请参见 磁盘数据配置参数,以及 磁盘数据和 GCP 停止错误。NDB Cluster Disk Data performance can be influenced by a number of configuration parameters. For information about these parameters and their effects, see Disk Data Configuration Parameters, and Disk Data and GCP Stop errors.
当为磁盘数据文件使用独立磁盘时,还应将 DiskDataUsingSameDisk 数据节点配置参数设置为 false。You should also set the
DiskDataUsingSameDisk data
node configuration parameter to false when
using separate disks for Disk Data files.
欲了解更多信息,请参见以下内容:For more information, see the following: