Update glossary.json

Author: Blargian

src/components/GlossaryTooltip/glossary.json

@@ -12,7 +12,7 @@
   "MergeTree": "A MergeTree in ClickHouse is a table engine designed for high data ingest rates and large data volumes. It is the core storage engine in ClickHouse, providing features such as columnar storage, custom partitioning, sparse primary indexes, and support for background data merges.",
   "Mutation": "A mutation in ClickHouse refers to an operation that modifies or deletes existing data in a table, typically using commands like ALTER TABLE ... UPDATE or ALTER TABLE ... DELETE. Mutations are implemented as asynchronous background processes that rewrite entire data parts affected by the change, rather than modifying rows in place.",
   "On-the-fly mutation": "On-the-fly mutations in ClickHouse are a mechanism that allows updates or deletes to be visible in subsequent SELECT queries immediately after the mutation is submitted, without waiting for the background mutation process to finish.",
-  "Parts": "A physical file on a disk that stores a portion of the table's data. This is different from a partition, which is a logical division of a table's data that is created using a partition key.",
+  "Parts": "A physical file (or directory) on disk that stores a portion of the table's data. This is different from a partition, which is a logical division of a table's data that is created using a partition key.",
   "Partitioning key": "A partitioning key in ClickHouse is a SQL expression defined in the PARTITION BY clause when creating a table. It determines how data is logically grouped into partitions on disk. Each unique value of the partitioning key forms its own physical partition, allowing for efficient data management operations such as dropping, moving, or archiving entire partitions.",
   "Primary key": "In ClickHouse, a primary key determines the order in which data is stored on disk and is used to build a sparse index that speeds up query filtering. Unlike traditional databases, the primary key in ClickHouse does not enforce uniqueness—multiple rows can have the same primary key value.",
   "Projection": "A projection in ClickHouse is a hidden, automatically maintained table that stores data in a different order or with precomputed aggregations to speed up queries, especially those filtering on columns not in the main primary key.",
@@ -24,4 +24,4 @@
   "Sparse index": "A type of indexing when the primary index contains one entry for a group of rows, rather than a single row. The entry that corresponds to a group of rows is referred to as a mark. With sparse indexes, ClickHouse first identifies groups of rows that potentially match the query and then processes them separately to find a match. Because of this, the primary index is small enough to be loaded into the memory.",
   "Table engine": "Table engines in ClickHouse determine how data is written, stored and accessed. MergeTree is the most common table engine, and allows quick insertion of large amounts of data which get processed in the background.",
   "TTL": "Time To Live (TTL) is A ClickHouse feature that automatically moves, deletes, or rolls up columns or rows after a certain time period. This allows you to manage storage more efficiently because you can delete, move, or archive the data that you no longer need to access frequently."
-}
+}