Should you choose to destroy cached and persisted data, the
flush_all operation is available at the
This operation is disabled by default as of the 1.8.1 Couchbase Server and above. This is to prevent accidental, detrimental data loss. Use of this operation should be done only with extreme caution, and most likely only for test databases as it will delete, item by item, every persisted item as well as destroy all cached data.
Third-party client testing tools may perform a
flush_all operation as part of their
test scripts. Be aware of the scripts run by your testing tools
and avoid triggering these test cases/operations unless you are
certain they are being performed on your sample/test database.
Inadvertent use of
production databases, or other data stores you intend to use
will result in permanent loss of data. Moreover the operation as
applied to a large data store will take many hours to remove
This next example demonstrates how to perform a synchronous and
flush in Ruby:
#synchronous flush c.flush #=> true #asynchronous flush c.run do c.flush do |ret| ret.operation #=> :flush ret.success? #=> true ret.node #=> "localhost:11211" end end
In the case of asynchronous operations we use the event loop in
Ruby. Within the loop we try to perform a
When you perform a
flush you provide the
URI for one node in the cluster as a parameter and it will operate
against all nodes in a cluster.