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Improve description of read/write traffic scalability 

Greg Smith, after a suggestion of James Bruce
This commit is contained in:
Alvaro Herrera 2011-05-03 11:34:27 -03:00
parent 155743ad31
commit 5614857096
1 changed files with 4 additions and 3 deletions
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7
doc/src/sgml/high-availability.sgml
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@ -188,9 +188,10 @@ protocol to make nodes agree on a serializable transactional order.
<para>
With statement-based replication middleware, a program intercepts
every SQL query and sends it to one or all servers. Each server
operates independently. Read-write queries are sent to all servers,
while read-only queries can be sent to just one server, allowing
the read workload to be distributed.
operates independently. Read-write queries must be sent to all servers,
so that every server receives any changes. But read-only queries can be
sent to just one server, allowing the read workload to be distributed
among them.
</para>
<para>