The new field `compression` in the `cluster{}` block allows to
specify which compression mode to use between servers.
It can be simply specified as a boolean or a string for the
simple modes, or as an object for the "s2_auto" mode where
a list of RTT thresholds can be specified.
By default, if no compression field is specified, the server
will use the s2_auto mode with default RTT thresholds of
10ms, 50ms and 100ms for the "uncompressed", "fast", "better"
and "best" modes.
```
cluster {
..
# Possible values are "disabled", "off", "enabled", "on",
# "accept", "s2_fast", "s2_better", "s2_best" or "s2_auto"
compression: s2_fast
}
```
To specify a different list of thresholds for the s2_auto,
here is how it would look like:
```
cluster {
..
compression: {
mode: s2_auto
# This means that for RTT up to 5ms (included), then
# the compression level will be "uncompressed", then
# from 5ms+ to 15ms, the mode will switch to "s2_fast",
# then from 15ms+ to 50ms, the level will switch to
# "s2_better", and anything above 50ms will result
# in the "s2_best" compression mode.
rtt_thresholds: [5ms, 15ms, 50ms]
}
}
```
Note that the "accept" mode means that a server will accept
compression from a remote and switch to that same compression
mode, but will otherwise not initiate compression. That is,
if 2 servers are configured with "accept", then compression
will actually be "off". If one of the server had say s2_fast
then they would both use this mode.
If a server has compression mode set (other than "off") but
connects to an older server, there will be no compression between
those 2 routes.
Signed-off-by: Ivan Kozlovic <ivan@synadia.com>
Currently in tests, we have calls to os.Remove and os.RemoveAll where we
don't check the returned error. This hides useful error messages when
tests fail to run, such as "too many open files".
This change checks for more filesystem related errors and calls t.Fatal
if there is an error.
When a leafnode would connect with credentials that had permissions the spoke did not have a way of knowing what those were.
This could lead to being disconnected when sending subscriptions or messages to the hub which were not allowed.
Signed-off-by: Derek Collison <derek@nats.io>
Added cluster names as required for prep work for clustered JetStream. System can dynamically pick a cluster name and settle on one even in large clusters.
Signed-off-by: Derek Collison <derek@nats.io>
- TestResponsePermissions: ensure subscription for service is
registered by server before sending requests.
- TestReloadDoesNotWipeAccountsWithOperatorMode: wait for subject
propagation.
Signed-off-by: Ivan Kozlovic <ivan@synadia.com>
Some tests consume too much memory when running with -race which
can cause some failures on Travis.
Moreover, those tests may not be meaningful if they are running
slow, which -race causes.
Signed-off-by: Ivan Kozlovic <ivan@synadia.com>
Refactor the way client is initialized. We need to ensure that
clients are not added to the clients map and readLoop started if
the server is in the process of being shutdown otherwise there
is a chance that the server already gathered the list of connections
to close and this one would not be included, leaving a readLoop
running.
Same occurs for routes, with the complexity that the readLoop is
started well before the route connection is added to the server
routes' list. We need a temporary map that contains those connections
to be able to close them on server Shutdown.
Fixed some flapping tests.
Both seed and chained cases are now handled properly when servers
connect quickly and concurrently to one another.
When accepting a route, the server will forward the new route INFO
protocol to its known routes. In turn those routes will connect
to the new server (if not already connected).
A retry for implicit route was introduced to mitigate the issue
with two servers connecting to each other and electing the opposite
connection as the winner, resulting in both connections being dropped.
The server with smaller ID will try once to reconnect.
Some tests were fixed to handle possible extra INFO protocol.
New tests added.
Fix issue: https://github.com/nats-io/gnatsd/issues/206
