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Updated Directories and Files (markdown)

Chris Lu 2019-06-29 10:37:01 -07:00
parent 2d870e7dad
commit 2d6c6ed813
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Directories-and-Files.md

@ -79,7 +79,8 @@ The Filer Store persists all file metadata and directory information.
| Filer Store Name | Lookup | number of entries in a folder | Scalability | Renaming | 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 |
| leveldb | O(logN)| unlimited | Local, Very Fast | | | Default, fairly scalable |
| leveldb2 | O(logN)| unlimited | Local, Very Fast, faster than leveldb | | | Similar to leveldb, the lookup key is 128bit full filename MD5 instead of the long full file name |
| 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 |Atomic| | Easy to manage, export |