docs: tfs support disable_create_new_file
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@ -197,20 +197,20 @@ By default, TDengine saves all data in /var/lib/taos directory, and the data fil
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dataDir format is as follows:
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```
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dataDir data_path [tier_level]
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dataDir data_path [tier_level] [primary] [disable_create_new_file]
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```
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Where data_path is the folder path of mount point and tier_level is the media storage-tier. The higher the media storage-tier, means the older the data file. Multiple hard disks can be mounted at the same storage-tier, and data files on the same storage-tier are distributed on all hard disks within the tier. TDengine supports up to 3 tiers of storage, so tier_level values are 0, 1, and 2. When configuring dataDir, there must be only one mount path without specifying tier_level, which is called special mount disk (path). The mount path defaults to level 0 storage media and contains special file links, which cannot be removed, otherwise it will have a devastating impact on the written data.
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Where `data_path` is the folder path of mount point, and `tier_level` is the media storage-tier. The higher the media storage-tier, means the older the data file. Multiple hard disks can be mounted at the same storage-tier, and data files on the same storage-tier are distributed on all hard disks within the tier. TDengine supports up to 3 tiers of storage, so tier_level values are 0, 1, and 2. When configuring dataDir, there must be only one mount path without specifying tier_level, which is called special mount disk (path). The mount path defaults to level 0 storage media and contains special file links, which cannot be removed, otherwise it will have a devastating impact on the written data. And `primary` means whether the mount point is the primary disk. Enter 0 for false or 1 for true. The default value is 1. A TDengine cluster can have only one `primary` mount point, which must be on tier 0. And `disable_create_new_file` means whether to prohibit the creation of new file sets on the specified mount point. Enter 0 for false and 1 for true. The default value is 0. Tier 0 storage must have at least one mount point with disable_create_new_file set to 0. Tier 1 and tier 2 storage do not have this restriction.
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Suppose there is a physical node with six mountable hard disks/mnt/disk1,/mnt/disk2, ..., /mnt/disk6, where disk1 and disk2 need to be designated as level 0 storage media, disk3 and disk4 are level 1 storage media, and disk5 and disk6 are level 2 storage media. Disk1 is a special mount disk, you can configure it in/etc/taos/taos.cfg as follows:
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```
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dataDir /mnt/disk1/taos
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dataDir /mnt/disk2/taos 0
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dataDir /mnt/disk3/taos 1
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dataDir /mnt/disk4/taos 1
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dataDir /mnt/disk5/taos 2
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dataDir /mnt/disk6/taos 2
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dataDir /mnt/disk1/taos 0 1 0
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dataDir /mnt/disk2/taos 0 0 0
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dataDir /mnt/disk3/taos 1 0 0
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dataDir /mnt/disk4/taos 1 0 1
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dataDir /mnt/disk5/taos 2 0 0
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dataDir /mnt/disk6/taos 2 0 0
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```
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Mounted disks can also be a non-local network disk, as long as the system can access it.
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@ -206,7 +206,7 @@ TDengine 采用数据驱动的方式让缓存中的数据写入硬盘进行持
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TDengine 多级存储配置方式如下（在配置文件/etc/taos/taos.cfg 中）：
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```
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dataDir [path] <level> <primary>
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dataDir [path] <level> <primary> <disable_create_new_file>
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```
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- path: 挂载点的文件夹路径
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@ -216,16 +216,17 @@ dataDir [path] <level> <primary>
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同一存储等级可挂载多个硬盘，同一存储等级上的数据文件分布在该存储等级的所有硬盘上。
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需要说明的是，数据在不同级别的存储介质上的移动，是由系统自动完成的，用户无需干预。
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- primary: 是否为主挂载点，0（否）或 1（是），省略默认为 1。
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- disable_create_new_file: 是否禁止创建新文件组，0（否）或 1（是），省略默认为 0。
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在配置中，只允许一个主挂载点的存在（level=0，primary=1），例如采用如下的配置方式：
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```
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dataDir /mnt/data1 0 1
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dataDir /mnt/data2 0 0
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dataDir /mnt/data3 1 0
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dataDir /mnt/data4 1 0
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dataDir /mnt/data5 2 0
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dataDir /mnt/data6 2 0
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dataDir /mnt/data1 0 1 0
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dataDir /mnt/data2 0 0 0
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dataDir /mnt/data3 1 0 0
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dataDir /mnt/data4 1 0 1
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dataDir /mnt/data5 2 0 0
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dataDir /mnt/data6 2 0 0
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```
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:::note
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@ -233,7 +234,7 @@ dataDir /mnt/data6 2 0
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1. 多级存储不允许跨级配置，合法的配置方案有：仅 0 级，仅 0 级+ 1 级，以及 0 级+ 1 级+ 2 级。而不允许只配置 level=0 和 level=2，而不配置 level=1。
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2. 禁止手动移除使用中的挂载盘，挂载盘目前不支持非本地的网络盘。
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3. 多级存储目前不支持删除已经挂载的硬盘的功能。
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4. 0 级存储至少存在一个 disable_create_new_file 为 0 的挂载点，1 级 和 2 级存储没有该限制。
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:::
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## 数据查询
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