Method, apparatus, and computer program stored in computer readable medium for managing storage server in database system

摘要

Disclosed is a method of managing a storage server in a database system. Provided is a storage server including a cache device to store at least one block that includes data; a permanent storage medium to record the at least one block stored in the cache device; and a controller to record the at least one block stored in the cache device in the permanent storage medium, wherein the controller includes a grade determiner to determine a grade of each of the at least one block based on a size of each of the at least one block; a victim block determiner to determine a victim block to be recorded in the permanent storage medium among blocks stored in the cache device based on the determined grade of each of the at least one block; and a block recorder to record the determined victim block in the permanent storage medium.

主权项

1. A storage server comprising:
a cache device to store at least one block that includes data; a permanent storage medium to record the at least one block stored in the cache device; and a controller to record the at least one block stored in the cache device in the permanent storage medium, wherein the controller comprises:
a grade determiner to determine a grade of each of the at least one block based on a size of each of the at least one block, wherein the grade determiner determines a grade of a block as large grade when a size of the block is greater than or equal to a grade decision standard, and determines the grade of the block as small grade when the size of the block is less than the grade decision standard; a victim block determiner to determine a victim block to be recorded in the permanent storage medium among blocks stored in the cache device based on the determined grade of each of the at least one block and a position recorded in the permanent storage medium with respect to blocks determined as the small grade, wherein the victim block determiner determines the victim block by applying a different policy based on the determined grade; and a block recorder to record the determined victim block in the permanent storage medium.