If an existing cache-entry should be updated, but the new value
is larger that the maximum size of the cache, then the cache can
not be updated, but the old value must be removed.
Whether or not we succeed in removing the entry, an error result
must be returned. Earlier OK was returned, but no node was
allocated, which then caused a crash.
Allows for code like
CacheConfig config("MXS-2727");
config.storage = std::string("inmemory_storage");
config.soft_ttl = std::chrono::seconds(1);
config.hard_ttl = std::chrono::seconds(10);
config.max_size = 10;
config.thread_model = CACHE_THREAD_MODEL_MT;
config.enabled = true;
to be used when you want to create a configuration manually and not
from a configuration file.
Made sure that the inserted row is replicated before inserting another
one. Shortened the test so that slower systems finish it within a
reasonable time. Increased the time that the writes are routed to the
master.
The `global` parameter causes the time window defined by the `time`
parameter to be applied at the instance level instead of the session
level. This means that a write from one connection will cause all other
connections to use the master for a certain period of time.
Using a configurable time window for consistency is not good as it is not
absolute and cannot adjust to how servers behave.
One example that demonstrates this is when a slave is normally lagging
behind by less than a second but some event causes the lag to spike up to
several seconds. In this case the configured time window would no longer
guarantee consistency.
Another reason to avoid a "static" time window is the fact taht it
prevents load balancing in the cases where slaves catch up to the master
within time window. This happens when time is configured to a higher value
to avoid inconsistencies at all costs.
Added a test case that verified the feature works.
In the tokenizer we will now recognize the character set names
of MariaDB and return a specific token for those. However, where
a character set name is not expected, it will automatically be
treated as an identifier.
Note that when the character set name is explicitly specified
for a literal string, the name must be prefixed with an underscore.
That is, if the character set name is "latin1", when used when
specifying a literal string, it's used as "_latin1 'a'".
Note that this does not fix the sqlite3 bug causing a leak, but
since the statement will now correctly be parsed, the leak will
not manifest itself.
The mkopcodeh.tcl of sqlite3 version 3110100 has a bug that
manifests itself so that it generates broken code depending on
what keywords there are and in what order. The mkopcodeh.tcl
from 3200000 does not have that problem.
Originally, the sqlite installation was imported into the MaxScale
repository in the one gigantic MaxScale 1.4 -> 2.0 commit.
Consequently, there is no import commit to compare to if you want
to extract all MaxScale specific changes. To make it simpler in the
future, sqlite will now be imported in a commit of its own.
Since the user authentication stores a SHA2-512 hash of the password on
disk, caching the hash results in memory speeds up the authentication
process significantly. Storing the password on disk in plain-text form
would also speed it up but this would be quite insecure.
