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Add timeout documentation.

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C. R. Oldham 2016-08-16 09:54:54 -06:00
parent 901ab8b74c
commit e31555345f
1 changed files with 27 additions and 0 deletions
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27
salt/returners/cassandra_cql_return.py
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@ -88,6 +88,33 @@ To use the cassandra returner, append '--return cassandra_cql' to the salt comma
.. code-block:: bash
salt '*' test.ping --return_cql cassandra
Note: if your Cassandra instance has not been tuned much you may benefit from
altering some timeouts in `cassandra.yaml` like so:
.. code-block:: bash
# How long the coordinator should wait for read operations to complete
read_request_timeout_in_ms: 5000
# How long the coordinator should wait for seq or index scans to complete
range_request_timeout_in_ms: 20000
# How long the coordinator should wait for writes to complete
write_request_timeout_in_ms: 20000
# How long the coordinator should wait for counter writes to complete
counter_write_request_timeout_in_ms: 10000
# How long a coordinator should continue to retry a CAS operation
# that contends with other proposals for the same row
cas_contention_timeout_in_ms: 5000
# How long the coordinator should wait for truncates to complete
# (This can be much longer, because unless auto_snapshot is disabled
# we need to flush first so we can snapshot before removing the data.)
truncate_request_timeout_in_ms: 60000
# The default timeout for other, miscellaneous operations
request_timeout_in_ms: 20000
As always, your mileage may vary and your Cassandra cluster may have different
needs. SaltStack has seen situations where these timeouts can resolve
some stacktraces that appear to come from the Datastax Python driver.
'''
from __future__ import absolute_import
# Let's not allow PyLint complain about string substitution