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Updated Filer Stores (markdown)

Chris Lu 2021-01-19 18:55:48 -08:00
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Filer-Stores.md

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The Filer Store persists all file metadata and directory information. The Filer Store persists all file metadata and directory information.
| Filer Store Name | Lookup | number of entries in a folder | Scalability | Directory Renaming | TTL | Note | | Filer Store Name | Lookup | number of entries in a folder | Scalability | Directory Renaming | TTL | Fast Bucket Deletion |Note |
| ---------------- | -- | -- | -- | -- | -- | -- | | ---------------- | -- | -- | -- | -- | -- | -- | -- |
| memory | O(1) | limited by memory | Local, Fast | | Yes| for testing only, no persistent storage | | memory | O(1) | limited by memory | Local, Fast | | Yes| | for testing only, no persistent storage |
| leveldb | O(logN)| unlimited | Local, Very Fast | | Yes| Default, fairly scalable | | leveldb | O(logN)| unlimited | Local, Very Fast | | Yes| | Default, fairly scalable |
| leveldb2 | O(logN)| unlimited | Local, Very Fast | | Yes| Similar to leveldb, part of the lookup key is 128bit MD5 instead of the long full file path | | leveldb2 | O(logN)| unlimited | Local, Very Fast | | Yes| | Similar to leveldb, part of the lookup key is 128bit MD5 instead of the long full file path |
| leveldb3 | O(logN)| unlimited | Local, Very Fast | | Yes| Similar to leveldb2, separate leveldb instance for each bucket | | leveldb3 | O(logN)| unlimited | Local, Very Fast | | Yes| Yes| Similar to leveldb2, separate leveldb instance for each bucket |
| RocksDB | O(logN)| unlimited | Local, Very Fast | | Native| Default, fairly scalable | | RocksDB | O(logN)| unlimited | Local, Very Fast | | Native| | Default, fairly scalable |
| Mongodb | O(logN)| unlimited | Local or Distributed, Fast | | Yes| Easy to manage | | Mongodb | O(logN)| unlimited | Local or Distributed, Fast | | Yes| | Easy to manage |
| Redis | O(1) | limited | Local or Distributed, Fastest ||Native| one directory's sub file names are stored in one key~value entry | | Redis | O(1) | limited | Local or Distributed, Fastest ||Native| | one directory's sub file names are stored in one key~value entry |
| Cassandra | O(logN)| unlimited | Local or Distributed, Very Fast||Native| | | Cassandra | O(logN)| unlimited | Local or Distributed, Very Fast||Native| | |
| MySql | O(logN)| unlimited | Local or Distributed, Fast |Atomic| Yes| Easy to manage | | MySql | O(logN)| unlimited | Local or Distributed, Fast |Atomic| Yes| | Easy to manage |
| Postgres | O(logN)| unlimited | Local or Distributed, Fast |Atomic| Yes| Easy to manage | | MySql2 | O(logN)| unlimited | Local or Distributed, Fast |Atomic| Yes| Yes| Easy to manage |
| MemSql | O(logN)| unlimited | Distributed, Fast |Atomic| Yes| Scalable | | Postgres | O(logN)| unlimited | Local or Distributed, Fast |Atomic| Yes| | Easy to manage |
| TiDB | O(logN)| unlimited | Distributed, Fast |Atomic| Yes| Scalable | | Postgres2 | O(logN)| unlimited | Local or Distributed, Fast |Atomic| Yes| Yes| Easy to manage |
| CockroachDB | O(logN)| unlimited | Distributed, Fast |Atomic| Yes| Scalable | | MemSql | O(logN)| unlimited | Distributed, Fast |Atomic| Yes| Yes| Scalable |
| Etcd | O(logN)| ~10GB | Distributed, 10,000 writes/sec || Yes| No SPOF. High Availability.| | TiDB | O(logN)| unlimited | Distributed, Fast |Atomic| Yes| Yes| Scalable |
| ElasticSearch| O(logN)| unlimited | Distributed, Fast || Yes| Scalable, Searchable | | CockroachDB | O(logN)| unlimited | Distributed, Fast |Atomic| Yes| Yes| Scalable |
| HBase | O(logN)| unlimited | Distributed, Fast | | Native| Scalable | | YugabyteDB | O(logN)| unlimited | Distributed, Fast |Atomic| Yes| Yes| Scalable |
| Etcd | O(logN)| ~10GB | Distributed, 10,000 writes/sec || Yes| | No SPOF. High Availability.|
| ElasticSearch| O(logN)| unlimited | Distributed, Fast || Yes| | Scalable, Searchable |
| HBase | O(logN)| unlimited | Distributed, Fast | | Native| | Scalable |
#### Switching between different Stores #### Switching between different Stores
It is easy to switch between different filer stores. It is easy to switch between different filer stores.