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Posted to issues@hbase.apache.org by GitBox <gi...@apache.org> on 2021/11/17 11:01:31 UTC
[GitHub] [hbase] virajjasani commented on pull request #3852: HBASE-26458 Add UNSET_SNAPSHOT_PROP and fix TTL defaulting
virajjasani commented on pull request #3852:
URL: https://github.com/apache/hbase/pull/3852#issuecomment-971465945
I just tested this locally on master branch.
**Configs:**
<property>
<name>hbase.master.cleaner.snapshot.interval</name>
<value>10000</value>
</property>
**Shell commands and respective outputs:**
> snapshot 't1', 's2'
Took 2.1034 seconds
> snapshot 't1', 's3', {TTL => -2}
Took 1.0925 seconds
=> [{"TTL"=>-2}]
> snapshot 't1', 's1', {TTL => 5}
Took 2.1023 seconds
=> [{"TTL"=>5}]
<img width="1630" alt="Screenshot 2021-11-17 at 4 17 11 PM" src="https://user-images.githubusercontent.com/34790606/142187725-e0f67af3-90bc-47ef-bd28-f73285c27dd3.png">
After 5sec, the snapshot was gone.
<img width="1568" alt="Screenshot 2021-11-17 at 4 19 32 PM" src="https://user-images.githubusercontent.com/34790606/142187833-749fb7a2-5a31-4956-9f65-b7fb8bda36ee.png">
**Configs:**
<property>
<name>hbase.master.cleaner.snapshot.interval</name>
<value>10000</value>
</property>
<property>
<name>hbase.master.snapshot.ttl</name>
<value>20</value>
</property>
**Shell commands and respective outputs:**
> snapshot 't1', 's4'
Took 2.7291 seconds
Snapshot 's4' gets created with TTL 20 sec because of config `hbase.master.snapshot.ttl`:
<img width="1584" alt="Screenshot 2021-11-17 at 4 21 49 PM" src="https://user-images.githubusercontent.com/34790606/142188010-15a2abf1-26aa-4553-a803-ec2e96b5803d.png">
After 20s, it was gone:
<img width="1539" alt="Screenshot 2021-11-17 at 4 22 04 PM" src="https://user-images.githubusercontent.com/34790606/142188219-1ada2b96-0a64-4f6c-b5f2-711b3abfc8e8.png">
> snapshot 't1', 's5', {TTL => -10}
Took 2.1079 seconds
=> [{"TTL"=>-10}]
<img width="1618" alt="Screenshot 2021-11-17 at 4 23 43 PM" src="https://user-images.githubusercontent.com/34790606/142188278-ed70511c-bea6-44f8-a3d6-c70c674bbd57.png">
1. TTL with negative values will stay forever regardless of any server side config changes.
2. TTL with positive values will be gone after TTL expires.
3. Snapshot created without specifying TTL will always have TTL values represented by config `hbase.master.snapshot.ttl`.
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