cbt | The Ceph Benchmarking Tool | DevOps library
kandi X-RAY | cbt Summary
kandi X-RAY | cbt Summary
CBT is a testing harness written in python that can automate a variety of tasks related to testing the performance of Ceph clusters. CBT does not install Ceph packages, it is expected that this will be done prior to utilizing CBT. CBT can create OSDs at the beginning of a test run, optionally recreate OSDs between test runs, or simply run against an existing cluster. CBT records system metrics with collectl, it can optionally collect more information using a number of tools including perf, blktrace, and valgrind. In addition to basic benchmarks, CBT can also do advanced testing that includes automated OSD outages, erasure coded pools, and cache tier configurations. The main benchmark modules are explained below.
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Trending Discussions on cbt
QUESTION
The official Mobx documentation for Flutter says that in order to transfer data correctly, you must use a Provider and refer to the context to retrieve the data.
But why can't I just call the Mobx class at the root of the application and access the global variable to get the data?
...ANSWER
Answered 2022-Jan-24 at 10:36You should do what works best for your use case.
The reason why providers are useful is that they can be provided where needed. This could be in the application root, but also somewhere deeper in the widget tree.
Another advantage of the providers is that you can have a provider that notifies listeners. Widgets will rebuild automatically in this case, which can be useful if you have stored and need data to update everywhere in the application.
The initState
does indeed not allow the use of providers directly. There are 3 solutions for this:
- Don't have the provider listing (Provider.of(context, listen: false); This allows you to use the methods, but not listen to changes.
- Use the provider in the build method, using the consumer.
I am by no means an expert on flutter, but this is just what I have experienced so far.
QUESTION
I am using LoggerHandler in a vertx web project. I am a bit confused about the output of the logger:
...ANSWER
Answered 2022-Jan-17 at 07:59You were actually very close to what you were looking for.
If you drilldown into the documentation you provided (https://vertx.io/docs/vertx-web/java/#_request_logger) you will see it has a LoggerFormat
(https://vertx.io/docs/apidocs/io/vertx/ext/web/handler/LoggerFormat.html#DEFAULT)
Default format is remote-client - - [timestamp] "method uri version" status content-length "referrer" "user-agent"
So if we breakdown your log:
QUESTION
I need to view the data in a BigTable table, but I can't find a data browser in the web console. (Dynamo has a nice browser in the AWS web console.) Is there a data browser for BigTable, or am I limited to the cbt command line?
...ANSWER
Answered 2021-Oct-21 at 12:58There is currently no data browser in the web console, so you're correct that you're limited to the cbt command line. One option that can help making viewing your data easier is to query Bigtable through BigQuery. This can be great for one off ways you want to look at your data, but you should be careful with using it on any production data since some of the queries can easily do full table scans which impact performance.
QUESTION
I was using GCloud Shell a few weeks ago and got pretty printed outputs from gcloud commands, like so:
...ANSWER
Answered 2021-Oct-13 at 15:14Thanks to @JohnHanley for the insight of gcloud config list
, I compared the configurations between embedded gcloud
and the downloaded version, then read some documentation to find that this behavior is only due to an accessibility option which is now set to true
by default.
For anyone having this issue, here is the command to get the good ol' pretty print output back:
QUESTION
Hello I am getting error "Missing '=' operator after key in hash literal." on the IF statement, where am I wrong
...ANSWER
Answered 2021-Sep-21 at 15:12You can't put a conditional statement in the middle of a hashtable literal like that.
You'll have to create the hashtable/dictionary first, then populate the relevant keys based on your conditional logic:
QUESTION
I've created a custom JPanel that has background with diagonal lines fixed or animated. I wondered that if I add any jcomponent to panel, it is not shown at all. I understand that problem is because I paint over components, but I don't know how solve it. Here is my complete code.
Some help will be appreciated :)
...ANSWER
Answered 2021-Sep-15 at 14:23Remove the call to g2.dispose()
and it will work like a charm. You should not dispose it as, that same Graphics
object is used further to draw the components inside the panel.
The main painting method works like this:
QUESTION
I have been using Google Bigtable from GCP, but need suggestions in connecting it to a GUI client like Apache Hue. The documentation on BigTable doesn't have much information on visualization. I have been using the cbt tool till now, but it doesn't provide GUI.
Any help is greatly appreciated!
...ANSWER
Answered 2021-Sep-06 at 11:03I found this post which discuss the same issue. I suggest you to give it a look.
Additionally I don't suggest you to use Apache HUE with GCP Big Table as this procedure is not well documented.
What are you trying to do exactly? If you want to monitor Big Table I suggest you to use the Cloud Bigtable Monitoring UI
QUESTION
I'm trying to write a dll to intercept a window from being resized, but i cant understand how to correctly specify the lParam in this case.
From the docs:
HCBT_MOVESIZE: Specifies a long pointer to a RECT structure containing the coordinates of the window. By changing the values in the structure, a CBTProc hook procedure can set the final coordinates of the window.
Current code:
...ANSWER
Answered 2021-Sep-03 at 07:09LPARAM is a pointer-sized value. It can hold any value that fits into a pointer. The meaning of the value commonly depends on context.
When handling a HCBT_MOVESIZE
callback it designates
a long pointer to a RECT structure
To use it, client code needs to convert the value into a value of the respective type. In C++ this is done using a cast, e.g.
QUESTION
Given the following setup:
...ANSWER
Answered 2021-Aug-25 at 20:17There are no objects of function types. The type will be adjusted to be a function pointer, which is why you delegated{func}
and delegated{func_ptr}
are exactly the same thing and former cannot be smaller.
Wrap the function call inside a function object (lambda, if you so prefer) to avoid the overhead of the function pointer.
If you would like to prevent the accidental use of the adjusted/decayed function pointer case when user tries to pass a function, then you could use a deleted overload for function references. I don't know how that could be achieved with CTAD, but if you provide a function interface, it could be done like this:
QUESTION
I have a function which returns array of promises of certain type - Order[]
But there's case when i pass value callback, which has function-type, inside params, then function should return ReturnType of callback, not Order[]
I tried this code
...ANSWER
Answered 2021-May-31 at 16:10Community Discussions, Code Snippets contain sources that include Stack Exchange Network
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Install cbt
You can use cbt like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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