lsm/seaweedfs
1
0
Fork 0
mirror of https://github.com/seaweedfs/seaweedfs.git synced 2025-11-24 08:46:54 +08:00
Code Issues Actions 17 Packages Projects Releases Wiki Activity

Updated Directories and Files (markdown)

Chris Lu
2019-01-08 20:30:01 -08:00
parent ab2db88872
commit 057f3c8b94
1 changed files with 8 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
Directories-and-Files.md

@@ -76,14 +76,14 @@ For directory renaming, it will be O(N) operations, with N as the number of file
The Filer Store persists all file metadata and directory information.
| Filer Store Name | Lookup | number of entries in a folder | Scalability | Note |
| ---------------- | -- | -- | -- | -- |
| memory | O(1) | limited by memory | Local, Fast | for testing only, no persistent storage |
| LevelDB | O(logN)| unlimited | Local, Very Fast | Default, fairly scalable |
| Redis | O(1) | limited | Local or Distributed, Fastest | one directory's sub file names are stored in one key~value entry |
| Cassandra | O(logN)| unlimited | Local or Distributed, Very Fast| |
| MySql | O(logN)| unlimited | Local or Distributed, Fast | Easy to manage, export |
| Postgres | O(logN)| unlimited | Local or Distributed, Fast | Easy to manage, export |
| Filer Store Name | Lookup | number of entries in a folder | Scalability | TTL | Note |
| ---------------- | -- | -- | -- | -- | -- |
| memory | O(1) | limited by memory | Local, Fast | | for testing only, no persistent storage |
| LevelDB | O(logN)| unlimited | Local, Very Fast | | Default, fairly scalable |
| Redis | O(1) | limited | Local or Distributed, Fastest |Yes| one directory's sub file names are stored in one key~value entry |
| Cassandra | O(logN)| unlimited | Local or Distributed, Very Fast|Yes| |
| MySql | O(logN)| unlimited | Local or Distributed, Fast | | Easy to manage, export |
| Postgres | O(logN)| unlimited | Local or Distributed, Fast | | Easy to manage, export |
#### Switching between different Stores
It is easy to switch between different filer stores (except memory store).