Hi Girish Sharma
> What additional advantage would one get by using that approach
> rather than simply using a one liner script to just call delete
> topic for each of those topics if the list of topics is known.
If users enabled `Geo-Replication` on a namespace in mistake(expected
only to enable one topic),
it is possible to create many topics on the remote cluster in one second.
Not long ago, 10,000 topics were created per second because of this
mistake. It took us a long time to
remove these topics. We delete these topics in this way:
```
cat topics_name_file | awk '{system("bin/pulsar-admin topics delete "$0)}'
)
```
It deletes topics one by one.
We conclude later that stress test tools such as `Jmeter` or `ab` should be
used to delete so many topics.
If Pulsar could provide these APIs, it would be better.
Thanks
Yubiao Feng
On Wed, Apr 19, 2023 at 3:29 PM Girish Sharma <scrapmachi...@gmail.com>
wrote:
> Hello Yubiao,
>
> What additional advantage would one get by using that approach rather than
> simply using a one liner script to just call delete topic for each of those
> topics if the list of topics is known.
>
> Regards
>
> On Wed, Apr 19, 2023 at 12:54 PM Yubiao Feng
> <yubiao.f...@streamnative.io.invalid> wrote:
>
> > In addition to these two, It is recommended to add a method to batch
> delete
> > topics, such as this:
> >
> > ```
> > pulsar-admin topics delete-all-topics <topic_1>, <topic_2>
> >
> > or
> >
> > pulsar-admin topics delete-all-topic <a file contains a topic_name lists>
> > ```
> >
> > Thanks
> > Yubiao Feng
> >
> > On Sat, Apr 15, 2023 at 5:37 PM Xiangying Meng <xiangy...@apache.org>
> > wrote:
> >
> > > Dear Apache Pulsar Community,
> > >
> > > I hope this email finds you well.I am writing to suggest a potential
> > > improvement to the Pulsar-admin tool,
> > > which I believe could simplify the process of cleaning up tenants and
> > > namespaces in Apache Pulsar.
> > >
> > > Currently, cleaning up all the namespaces and topics within a tenant or
> > > cleaning up all the topics within a namespace requires several manual
> > > steps,
> > > such as listing the namespaces, listing the topics, and then deleting
> > each
> > > topic individually.
> > > This process can be time-consuming and error-prone for users.
> > >
> > > To address this issue, I propose the addition of a "clear" parameter to
> > the
> > > Pulsar-admin tool,
> > > which would automate the cleanup process for tenants and namespaces.
> > Here's
> > > a conceptual implementation:
> > >
> > > 1. To clean up all namespaces and topics within a tenant:
> > > ``` bash
> > > pulsar-admin tenants clear <tenant-name>
> > > ```
> > > 2. To clean up all topics within a namespace:
> > > ```bash
> > > pulsar-admin namespaces clear <tenant-name>/<namespace-name>
> > > ```
> > >
> > > By implementing these new parameters, users would be able to perform
> > > cleanup operations more efficiently and with fewer manual steps.
> > > I believe this improvement would greatly enhance the user experience
> when
> > > working with Apache Pulsar.
> > >
> > > I'd like to discuss the feasibility of this suggestion and gather
> > feedback
> > > from the community.
> > > If everyone agrees, I can work on implementing this feature and submit
> a
> > > pull request for review.
> > >
> > > Looking forward to hearing your thoughts on this.
> > >
> > > Best regards,
> > > Xiangying
> > >
> >
>
>
> --
> Girish Sharma
>
