89352

89352



lmproving Replication Performance

As the number of slaves connecting to a master increases, the load, although minimal, also increases,

as each slave uses a Client connection to the master. Also, as each slave must receive a fuli copy of

the master binary log, the network load on the master may also increase and create a bottleneck.

If you are using a large number of slaves connected to one master, and that master is also busy

Processing requests (for example, as part of a scale-out solution), then you may want to improve the

performance of the replication process.

One way to improve the performance of the replication process is to create a deeper replication

structure that enables the master to replicate to only one slave, and for the remaining slaves to connect

to this primary slave for their individual replication requirements. A sample of this structure is shown in

Figurę 16.3, “Using an Additional Replication Hostto lmprove Performance’’.



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