update tikv-server-config file with bottommost-level-compression (pin…

…gcap#4480) * update tikv-server-config file with bottommost-level-compression * Update tikv-configuration-file.md * Update tikv-configuration-file.md * Apply suggestions from code review Co-authored-by: TomShawn <41534398+TomShawn@users.noreply.github.com> * Apply suggestions from code review Co-authored-by: TomShawn <41534398+TomShawn@users.noreply.github.com> * Update tikv-configuration-file.md Co-authored-by: TomShawn <41534398+TomShawn@users.noreply.github.com>
Frank945946 · Dec 24, 2020 · 5910392 · 5910392
1 parent 94ad2b8
commit 5910392
Show file tree

Hide file tree

Showing 2 changed files with 8 additions and 1 deletion.
diff --git a/data-type-numeric.md b/data-type-numeric.md
@@ -14,7 +14,7 @@ TiDB supports all the MySQL numeric types, including:
 
 ## Integer types
 
-TiDB supports all the MySQL integer types, including `INTEGER`/`INT`, `TINYINT`, `SMALLINT`, `MEDIUMINT`, and `BIGINT`. For more information, see [Numeric Data Type Syntax in MySQL](https://dev.mysql.com/doc/refman/5.7/en/numeric-type-syntax.html).
+TiDB supports all the MySQL integer types, including `INTEGER`/`INT`, `TINYINT`, `SMALLINT`, `MEDIUMINT`, and `BIGINT`. For more information, see [Integer Data Type Syntax in MySQL](https://dev.mysql.com/doc/refman/5.7/en/integer-types.html).
 
 The following table summarizes field descriptions:
 

diff --git a/tikv-configuration-file.md b/tikv-configuration-file.md
@@ -894,6 +894,13 @@ Configuration items related to `rocksdb.defaultcf`
 + Optional values: ["no", "no", "lz4", "lz4", "lz4", "zstd", "zstd"]
 + Default value: `No` for the first two levels, and `lz4` for the next five levels
 
+### `bottommost-level-compression`
+
++ Sets the compression algorithm of the bottommost layer. This configuration item overrides the `compression-per-level` setting.
++ Ever since data is written to LSM-tree, RocksDB does not directly adopt the last compression algorithm specified in the `compression-per-level` array for the bottommost layer. `bottommost-level-compression` enables the bottommost layer to use the compression algorithm of the best compression effect from the beginning.
++ If you do not want to set the compression algorithm for the bottommost layer, set the value of this configuration item to `disable`.
++ Default value: "zstd"
+
 ### `write-buffer-size`
 
 + Memtable size