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Updated Directories and Files (markdown)

Chris Lu 2019-08-05 11:46:40 -07:00
parent 3db7b1894e
commit 2d4394540e
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Directories-and-Files.md

@ -49,7 +49,7 @@ Filer has a persistent client connecting to Master, to get the location updates
There are no network round trip to lookup the volume id location.
For file reads:
1. Filer lookup metadata from Filer Store, which can be Cassandra/Mysql/Postgres/Redis/LevelDB.
1. Filer lookup metadata from Filer Store, which can be Cassandra/Mysql/Postgres/Redis/LevelDB/etcd.
2. Filer read from volume servers and pass along to the read request.
![](FilerRead.png)
@ -85,6 +85,7 @@ The Filer Store persists all file metadata and directory information.
| Cassandra | O(logN)| unlimited | Local or Distributed, Very Fast||Yes| |
| MySql | O(logN)| unlimited | Local or Distributed, Fast |Atomic| | Easy to manage, export |
| Postgres | O(logN)| unlimited | Local or Distributed, Fast |Atomic| | Easy to manage, export |
| Etcd | O(logN)| ~10GB | Distributed, 10,000 writes/sec || | No SPOF. High Availability.|
#### Switching between different Stores
It is easy to switch between different filer stores.