Hi,
On 20.7.2016 14:32, David Kupka wrote:
On 15/07/16 12:53, David Kupka wrote:
Hello!
After Honza introduced thin client that builds plugins and commands
dynamically from schema client became much slower. This is only logical,
instead of importing a module client now must fetch the schema from
server, parse it and instantiate the commands using the data.
First step to speed it up was addition of schema cache to client. That
removed the RTT and download time of fetching schema every time.
Now the most time consuming task became displaying help for lists of
topics and command and displaying individual topics. This is simply
because of the need to instantiate all the commands to find the
relations between topics and commands.
All the necessary bits for server commands and topics are already in the
schema cache so we can skip this part and generate help from it, right?
Not so fast!
There are client plugins with commands and topics. So we can generate
basic bits (list of all topics, list of all commands, list of commands
for each topic) from schema and store it in cache. Then we need to go
through all client plugins and get similar bits for client plugins. Then
we can merge and print.
Still the client response is not as fast as before and I this it even
can't be. Also first time you display particular topic or list takes
longer because it must be freshly generated and stored in cache for next
use. And this is what the attached patches do.
https://fedorahosted.org/freeipa/ticket/6048
Reimplemented so there is no need to distinguish client plugins and
remote plugins.
The main idea of this approach is to avoid creating instances of the
commands just to get the information about topic, name and summary
needed for displaying help. Instead class properties are used to access
the information directly in schema.
Patch 0112:
I think this would better be done in Schema.read_namespace_member,
because Schema is where all the state is.
(BTW does _SchemaNameSpace.__getitem__ raise KeyError for non-existent
keys? It looks like it doesn't.)
Patch 0113:
How about setting _schema_cached to False in Schema.__init__() rather
that getattr()-ing it in _ensure_cached()?
Patch 0116:
ClientCommand.doc should be a class property as well, otherwise .summary
won't work on it correctly.
_SchemaCommand.doc should not be a property, as it's not needed for
.summary to work on it correctly.
Otherwise works fine for me.
Honza
--
Jan Cholasta
--
Manage your subscription for the Freeipa-devel mailing list:
https://www.redhat.com/mailman/listinfo/freeipa-devel
Contribute to FreeIPA: http://www.freeipa.org/page/Contribute/Code
