diff --git a/site3/website/docs/admin/bookies.md b/site3/website/docs/admin/bookies.md index 2971a444c44..d289022d1ad 100644 --- a/site3/website/docs/admin/bookies.md +++ b/site3/website/docs/admin/bookies.md @@ -18,8 +18,14 @@ There is no upper limit on the number of bookies that you can run in a single en ### Performance +#### Disks + To achieve optimal performance, BookKeeper requires each server to have at least two disks. It's possible to run a bookie with a single disk but performance will be significantly degraded. +#### Sticky reads + +BookKeeper sticky reads enables bookie node to read entries efficiently. The sticky reads are only available when ensemble (E) size is equal to quorum write (Qw). + ### ZooKeeper There is no constraint on the number of ZooKeeper nodes you can run with BookKeeper. A single machine running ZooKeeper in [standalone mode](https://zookeeper.apache.org/doc/current/zookeeperStarted.html#sc_InstallingSingleMode) is sufficient for BookKeeper, although for the sake of higher resilience we recommend running ZooKeeper in [quorum mode](https://zookeeper.apache.org/doc/current/zookeeperStarted.html#sc_RunningReplicatedZooKeeper) with multiple servers.