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Issue #4130: [doc][site] split performance in two parts and add sticky reads part. #4131

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Issue #4130: [doc][site] split performance in two parts and add sticky reads part. #4131

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6 changes: 6 additions & 0 deletions site3/website/docs/admin/bookies.md
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Expand Up @@ -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).
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@hangc0276 Can you verify me? You are the expert here

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LGTM


### 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.
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