How to optimize SSD hard disks in linux, and how to optimize SSD hard disks in linux

How to optimize SSD hard disks in linux, and how to optimize SSD hard disks in linux

1. ext4 file system is the fastest on SSD Hard Disk

2. the I/O algorithm is modified to noop, and the operating system does not process it, so that the SSD itself can process it.

Echo noop>/sys/block/sdb/queue/schedue

3. echo 4096> read_ahead_kb

Indicates the number of Kb of pre-read data. The default value is 128.

4. echo 4096> nr_requests

The default queue length is 128.

5. view the IO Scheduling Algorithms supported by the current system

Demesg | grep-I scheduler

6. view the I/O Scheduling Algorithm of the current system

Cat/sys/block/sdb/queue/schedue

7. Clear Cache

A) release the linux Cache

Echo 3>/proc/sys/vm/drop_caches defaults to 0

Mem used = free + buffers + cached

B) release the page Cache

Echo 1>/proc/sys/vm/drop_caches

C) Release dentries and inodes caches

Echo 2>/proc/sys/vm/drop_caches