Tejaskriya opened a new pull request, #7289:
URL: https://github.com/apache/ozone/pull/7289
## What changes were proposed in this pull request?
Currently, `ozone debug ldb scan` command has a `--filter` option supporting
the following operations for the records stored in the rocksDB: `EQUALS,
LESSER, GREATER`.
Adding support for matching with regex will be useful while debugging as any
pattern of keys can be found with it.
For example, if a value has many fields like [name, location->[address, DN,
IP], version, lastUpdateTime], using the option `--filter={name:regex:^a.*}`
will display records with name that start with the letter 'a'
A fields along with the regex that should be used to is given to the
command, and only those records passing the condition it will be shown.
eg.) `ozone debug ldb --db=/data/metadata/om.db scan --cf=volumeTable
--filter="usedNamespace:greater:2,adminName:regex:^a.*a$" `
--> Will show only the records having usedNamespace>2 and adminName starting
and ending with the letter 'a'.
## What is the link to the Apache JIRA
https://issues.apache.org/jira/browse/HDDS-11546
## How was this patch tested?
Added unit tests in TestLDBCli.java and added robot test in
ozone-debug-ldb.robot.
Also tested locally in a db:
```
$ ozone debug ldb --db=ZDump/bigDB/omMBdb/om.db scan --cf=keyTable -l=3
--fields="objectID,volumeName,bucketName,keyName,dataSize,creationTime"
--filter="acls.name:equals:systest,creationTime:regex:^172[0-9]*237$"
{
"/55406660-10tb/ozone-legacy-ec-1st-bucket-55406660/10T-1-terasort-input/_SUCCESS":
{
"bucketName" : "ozone-legacy-ec-1st-bucket-55406660",
"creationTime" : 1722744719237,
"volumeName" : "55406660-10tb",
"keyName" : "10T-1-terasort-input/_SUCCESS",
"dataSize" : 0,
"objectID" : -9223372036249583104
}
}
$ ozone debug ldb --db=ZDump/bigDB/om.db scan --cf=volumeTable
--fields=volume,usedNamespace,adminName
--filter="usedNamespace:equals:2,adminName:regex:^i.*"
{ "/cai": {
"volume" : "cai",
"adminName" : "impala",
"usedNamespace" : 2
}
}
```
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