Learning diary: Linux File System Restrictions and features

We use computers, but do we know how computers work? An operating system is essential to a computer. Here we will introduce the knowledge of Linux, so that you can learn how to use Linux. Today we will talk about Linux File System Restrictions and features. I hope you will remember the Linux File System Restrictions and features.

Ext2
Ext2 file system is a Linux-specific file system. It has many features of traditional UNIX file systems, such as blocks and inode.
And directory. Ext2 is very robust and has many excellent performances. In addition, Ext2 is scalable and provides
Allows you to use new features without formatting the file system.
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Maximum file size: 1 TB
Maximum File limit: only limited by the file system size
Maximum partition/file system size: 4 TB
Maximum File Name Length: 255 characters
Default minimum/maximum block size: 1024/4096 bytes
Default inode allocation: 1 for every 4096 bytes
Maximum load before force FS check: 20 configurable)
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Ext3
The Ext3 file system is built on the ext2 file system, and logs are extended for the standard Linux ext2 file system.
The log feature significantly reduces the recovery time after a file system crash. It is widely used in HA sites with shared disks.
Point.
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Maximum file size: 1 TB
Maximum File limit: only limited by the file system size
Maximum partition/file system size: 4 TB
Maximum File Name Length: 255 characters
Default minimum/maximum block size: 1024/4096 bytes
Default inode allocation: 1 for every 4096 bytes
Maximum load before force FS check: 20 configurable)
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ReiserFS
ReiserFS File System 3.2.25 is an optional log file system. Its advantages include better disk space utilization,
Better disk access performance and faster crash recovery.
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Maximum file size: 1 TB
Maximum File limit: 32 k directory, 4.2 billion files
Maximum partition/file system size: 4 TB
Maximum File Name Length: 255 characters
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JFS
Journaled File System (JFS) is a fully 64-bit File System. All File System Structure Characters
The CIDR block size is 64-bit. It allows JFS to support both large files and partitions. JFS is developed by IBM according to the GPL license. It
It was transplanted from its AIX system.
JFS provides a log-based byte-level file system that can be used to develop a transaction-oriented high-performance system. It is scalable
Is stable and reliable. Its advantage over non-log file systems lies in its fast restart capability. JFS can be used in seconds
Or restore the file system to a consistent state within minutes.
Although it primarily targets high throughput and reliability requirements for servers, from a single processor system to an advanced multi-processor and Cluster
System), JFS is also suitable for customer configurations that require performance and reliability.
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Minimum File System size: 16 MB
Maximum file size: restricted by the architecture
Maximum File limit: limited by the file system size
Default minimum/maximum block size: 1024/4096 bytes
Default inode allocation: Dynamic
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LVM
The Logical Volume Manager (LVM) is a subsystem for online disk storage management.
It has become a "de facto" standard for cross-Linux storage management.
LVM supports enterprise-level volume Management of disks and disk subsystems. It can be grouped into any number of disks to the volume group. Volume Group
The total capacity can be allocated to logical volumes that can be accessed by normal Block devices.
In addition, LVM provides logical separation of storage. When the block device size is adjusted online
Data is moved from one physical device to another. LVM also allows the system administrator to easily upgrade the system,
Remove faulty disks, reorganize loads, and adapt to changed system requirements.
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Maximum logical volume size: 256 Gb in 4 Mb disk range
To 1 Pb of large PE
Maximum logical volume: 256
Maximum number of logical groups: 99
Maximum number of PES per PV: 65534
Default physical disk size: 4 Mb

I hope you can learn about the Linux File System Restrictions and features.

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