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Updated Filer Store Replication (markdown)

Chris Lu 2021-11-07 14:49:18 -08:00
parent f30e537390
commit 72f2276c1a
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Filer-Store-Replication.md

@ -34,7 +34,9 @@ So aggregating metadata updates form its peers is required when the filers are u
If the filer is running on embedded store, the metadata updates from its peers would be saved locally.
This basically synchronize the metadata across all the filer stores. If filers are using shared filer stores, this is optional.
This basically synchronize the metadata across all the filer stores, where every filer store will have a full copy of all the metadata.
This also naturally replicated the filer store to achieve high availability for metadata.
# Example Topologies
@ -57,7 +59,7 @@ filer1(leveldb) <-> filer2(leveldb)
filer1(leveldb) <-> filer2(rocksdb)
```
* Two filers with one shared stores are fine.
* Two filers with one shared store instance are fine.
```
filer1(mysql) <-> filer2(mysql)
@ -65,6 +67,7 @@ filer1(mysql) <-> filer2(mysql)
* Two filers with a shared store and an embedded store are NOT fine.
This is because the `filer2` here will not attempt to persist `filer1` metadata updates to its mysql store.
```
filer1(leveldb) <--XX NOT WORKING XX---> filer2(mysql)
```