[HDDS-11423] Implement equals operation for --filter option to ozone ldb scan

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.0.0
• Labels: pull-request-available
• Assignee: Tejaskriya Madhan
• Reporter: Tejaskriya Madhan
• Created: 05/Sep/24 13:42
• Updated: 30/Sep/24 08:12
• Resolved: 30/Sep/24 08:12

Description

Currently, `ozone debug ldb scan` command shows all the records. These following options are present to limit to number of records being shown:

--length to show a number of records
--startkey and --endkey to show records between a range of keys

Having a --filter option which selects records that have a given value for a particular field will make debugging easier.

 

For example, if a value has many fields like [name, location->[address, DN, IP], version, lastUpdateTime] ,

1. using the option "--filter={version:1}" will display records that have the value 1 for version.
2. using the option "–filter={lastUpdateTime:MAX}" will display the record with the highest lastUpdateTime
3. using the option "–filter={lastUpdateTime:MIN}" will display the record with the lowest lastUpdateTime

 

Having a --filter option for `ozone debug ldb scan` command which selects records that have a given value for a particular field will make debugging easier.
A list of fields along with the value it should have, is given to the command, and only those records matching it will be shown.

eg.) ozone debug ldb --db=/data/metadata/om.db scan --cf=volumeTable --filter="usedNamespace:equals:2,adminName:equals:impala" 
Will show only the records having usedNamespace=2 and adminName="impala"

Issue Links

• links to: GitHub Pull Request #7167