feat: change the max value of minFreeDiskSize to 2TB (#30250)

* feat: change the max value of minFreeDiskSize to 2TB

* fix: CI test case change

* enh: remove useless comment

docs/en/08-operation/12-multi.md

@@ -55,7 +55,7 @@ When network I/O and other processing resources are not bottlenecks, by optimizi
 
 Generally, when TDengine needs to select a mount point from the same level to create a new data file, it uses a round-robin strategy for selection. However, in reality, each disk may have different capacities, or the same capacity but different amounts of data written, leading to an imbalance in available space on each disk. In practice, this may result in selecting a disk with very little remaining space.
 
-To address this issue, starting from 3.1.1.0, a new configuration minDiskFreeSize was introduced. When the available space on a disk is less than or equal to this threshold, that disk will no longer be selected for generating new data files. The unit of this configuration item is bytes, and its value should be greater than 2GB, i.e., mount points with less than 2GB of available space will be skipped.
+To address this issue, starting from 3.1.1.0, a new configuration minDiskFreeSize was introduced. When the available space on a disk is less than or equal to this threshold, that disk will no longer be selected for generating new data files. The unit of this configuration item is bytes. If its value is set as 2GB, i.e., mount points with less than 2GB of available space will be skipped.
 
 Starting from version 3.3.2.0, a new configuration `disable_create_new_file` has been introduced to control the prohibition of generating new files on a certain mount point. The default value is `false`, which means new files can be generated on each mount point by default.
 

docs/en/14-reference/01-components/01-taosd.md

@@ -170,7 +170,7 @@ The effective value of charset is UTF-8.
 |tempDir             |          |Not supported                     |Specifies the directory for generating temporary files during system operation, default value /tmp|
 |minimalDataDirGB    |          |Not supported                     |Minimum space to be reserved in the time-series data storage directory specified by dataDir, in GB, default value 2|
 |minimalTmpDirGB     |          |Not supported                     |Minimum space to be reserved in the temporary file directory specified by tempDir, in GB, default value 1|
-|minDiskFreeSize     |After 3.1.1.0|Supported, effective immediately  |When the available space on a disk is less than or equal to this threshold, the disk will no longer be selected for generating new data files, unit is bytes, range 52428800-1073741824, default value 52428800; Enterprise parameter|
+|minDiskFreeSize     |After 3.1.1.0|Supported, effective immediately  |When the available space on a disk is less than or equal to this threshold, the disk will no longer be selected for generating new data files, unit is bytes, range 52428800-2199023255552, default value 52428800; Enterprise parameter|
 |s3MigrateIntervalSec|After 3.3.4.3|Supported, effective immediately  |Trigger cycle for automatic upload of local data files to S3, in seconds. Minimum: 600; Maximum: 100000. Default value 3600; Enterprise parameter|
 |s3MigrateEnabled    |After 3.3.4.3|Supported, effective immediately  |Whether to automatically perform S3 migration, default value is 0, which means auto S3 migration is off, can be set to 1; Enterprise parameter|
 |s3Accesskey         |After 3.3.4.3|Supported, effective after restart|Colon-separated user SecretId:SecretKey, for example AKIDsQmwsfKxTo2A6nGVXZN0UlofKn6JRRSJ:lIdoy99ygEacU7iHfogaN2Xq0yumSm1E; Enterprise parameter|

docs/zh/08-operation/12-multi.md

@@ -56,7 +56,7 @@ dataDir /mnt/data6 2 0
 
 一般情况下，当 TDengine 要从同级挂载点中选择一个用于生成新的数据文件时，采用 round robin 策略进行选择。但现实中有可能每个磁盘的容量不相同，或者容量相同但写入的数据量不相同，这就导致会出现每个磁盘上的可用空间不均衡，在实际进行选择时有可能会选择到一个剩余空间已经很小的磁盘。
 
-为了解决这个问题，从 3.1.1.0 开始引入了一个新的配置 minDiskFreeSize，当某块磁盘上的可用空间小于等于这个阈值时，该磁盘将不再被选择用于生成新的数据文件。该配置项的单位为字节，其值应该大于 2GB，即会跳过可用空间小于 2GB 的挂载点。
+为了解决这个问题，从 3.1.1.0 开始引入了一个新的配置 minDiskFreeSize，当某块磁盘上的可用空间小于等于这个阈值时，该磁盘将不再被选择用于生成新的数据文件。该配置项的单位为字节，若配置值大于 2GB，则会跳过可用空间小于 2GB 的挂载点。
 
 从 3.3.2.0 版本开始，引入了一个新的配置 disable_create_new_file，用于控制在某个挂载点上禁止生成新文件，其缺省值为 false，即每个挂载点上默认都可以生成新文件。
 

docs/zh/14-reference/01-components/01-taosd.md

@@ -582,9 +582,9 @@ charset 的有效值是 UTF-8。
 - 说明：当某块磁盘上的可用空间小于等于这个阈值时，该磁盘将不再被选择用于生成新的数据文件。 **`企业版参数`**
 - 类型：整数
 - 单位：byte
-- 默认值：52428800
+- 默认值：52428800 (50MB)
-- 最小值：52428800
+- 最小值：52428800 (50MB)
-- 最大值：1073741824
+- 最大值：2199023255552 (2TB)
 - 动态修改：支持通过 SQL 修改，立即生效。
 - 支持版本：从 v3.1.0.0 版本开始引入
 

include/util/tdef.h

@@ -576,7 +576,8 @@ typedef enum ELogicConditionType {
 #define TFS_MAX_LEVEL          (TFS_MAX_TIERS - 1)
 #define TFS_PRIMARY_LEVEL      0
 #define TFS_PRIMARY_ID         0
-#define TFS_MIN_DISK_FREE_SIZE 50 * 1024 * 1024
+#define TFS_MIN_DISK_FREE_SIZE     50 * 1024 * 1024                    // 50MB
+#define TFS_MIN_DISK_FREE_SIZE_MAX (2ULL * 1024 * 1024 * 1024 * 1024)  // 2TB
 
 enum { TRANS_STAT_INIT = 0, TRANS_STAT_EXECUTING, TRANS_STAT_EXECUTED, TRANS_STAT_ROLLBACKING, TRANS_STAT_ROLLBACKED };
 enum { TRANS_OPER_INIT = 0, TRANS_OPER_EXECUTE, TRANS_OPER_ROLLBACK };

source/common/src/tglobal.c

@@ -959,8 +959,7 @@ static int32_t taosAddServerCfg(SConfig *pCfg) {
   TAOS_CHECK_RETURN(cfgAddInt32(pCfg, "s3PageCacheSize", tsS3PageCacheSize, 4, 1024 * 1024 * 1024, CFG_SCOPE_SERVER, CFG_DYN_ENT_SERVER_LAZY,CFG_CATEGORY_GLOBAL));
   TAOS_CHECK_RETURN(cfgAddInt32(pCfg, "s3UploadDelaySec", tsS3UploadDelaySec, 1, 60 * 60 * 24 * 30, CFG_SCOPE_SERVER, CFG_DYN_ENT_SERVER,CFG_CATEGORY_GLOBAL));
 
-  // min free disk space used to check if the disk is full [50MB, 1GB]
+  TAOS_CHECK_RETURN(cfgAddInt64(pCfg, "minDiskFreeSize", tsMinDiskFreeSize, TFS_MIN_DISK_FREE_SIZE, TFS_MIN_DISK_FREE_SIZE_MAX, CFG_SCOPE_SERVER, CFG_DYN_ENT_SERVER,CFG_CATEGORY_LOCAL));
-  TAOS_CHECK_RETURN(cfgAddInt64(pCfg, "minDiskFreeSize", tsMinDiskFreeSize, TFS_MIN_DISK_FREE_SIZE, 1024 * 1024 * 1024, CFG_SCOPE_SERVER, CFG_DYN_ENT_SERVER,CFG_CATEGORY_LOCAL));
   TAOS_CHECK_RETURN(cfgAddBool(pCfg, "enableWhiteList", tsEnableWhiteList, CFG_SCOPE_SERVER, CFG_DYN_SERVER,CFG_CATEGORY_GLOBAL));
 
   // clang-format on

tests/system-test/0-others/test_hot_refresh_configurations.py

@@ -102,7 +102,7 @@ class TDTestCase:
                     "alias": "tsMinDiskFreeSize",
                     "values": ["51200K", "100M", "1G"],
                     "check_values": ["52428800", "104857600", "1073741824"],
-                    "except_values": ["1024K", "1.1G", "1T"]
+                    "except_values": ["1024K", "2049G", "3T"]
                 },
                 {
                     "name": "tmqMaxTopicNum",