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Answered 4 days ago Learn Manual Testing
Vivek Joglekar
Wroking in IT industry from last 15 years and and trained more than 5000+ Students. Conact ME
Answered 4 days ago Learn Manual Testing
Vivek Joglekar
Wroking in IT industry from last 15 years and and trained more than 5000+ Students. Conact ME
Answered 4 days ago Learn Manual Testing
Vivek Joglekar
Wroking in IT industry from last 15 years and and trained more than 5000+ Students. Conact ME
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Answered 1 day ago Learn Revit Architecture
Supriy Sanvaliya
Civil Design Engineer 7 years of site execution & 5 years of Civil software teaching experience
Answered 1 day ago Learn Revit Architecture
Supriy Sanvaliya
Civil Design Engineer 7 years of site execution & 5 years of Civil software teaching experience
Answered 1 day ago Learn Revit Architecture
Rakhi Yadav
5 year experience teacher as a hindi tutor online and offline both
Here are some places in India where you can get Revit Architecture & MEP training and certification ¹ ²:
- NIBT: Offers basic training courses in Revit and building information modeling.
- Novatr: Offers a six-month course in Autodesk Revit and BIM for architects.
- IFS Academy: Offers a basic training course in Revit architecture online.
- CETPA INFOTECH: Offers four- to six-month training courses in Revit architecture.
- Kaarwan: Offers a one- to two-month course in Revit and BIM certification.
- Siva Soft: Offers a one-month training course in Revit architecture.
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Answered 1 day ago Learn Revit Architecture
Supriy Sanvaliya
Civil Design Engineer 7 years of site execution & 5 years of Civil software teaching experience
Answered 1 day ago Learn Revit Architecture
Supriy Sanvaliya
Civil Design Engineer 7 years of site execution & 5 years of Civil software teaching experience
Answered 1 day ago Learn Revit Architecture
Supriy Sanvaliya
Civil Design Engineer 7 years of site execution & 5 years of Civil software teaching experience
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Answered on 01 Jun Learn IT Courses
Anurag Sharma
## Understanding and Writing Splunk Searches: Basic to Advanced SPL Queries
### Basics of Splunk Searches
#### 1. **Search Command**
The foundation of any SPL query. It retrieves events from the specified index.
```spl
index=<index_name> search_term
```
Example:
```spl
index=web_logs error
```
#### 2. **Fields and Filters**
Specify fields and apply filters to narrow down search results.
```spl
index=web_logs status=404
```
#### 3. **Time Range**
You can specify a time range using `earliest` and `latest`.
```spl
index=web_logs error earliest=-1h
```
### Intermediate SPL Queries
#### 1. **Stats Command**
The `stats` command is used to aggregate data.
```spl
index=web_logs | stats count by status
```
#### 2. **Table Command**
Use `table` to display specific fields.
```spl
index=web_logs | table _time, status, uri_path
```
#### 3. **Sort Command**
Sort results by a specific field.
```spl
index=web_logs | sort -_time
```
### Advanced SPL Queries
#### 1. **Eval Command**
The `eval` command creates new fields or transforms existing fields.
```spl
index=web_logs | eval status_code_group=if(status>=500, "5xx", "Other")
```
#### 2. **Timechart Command**
Use `timechart` for time-based data aggregation.
```spl
index=web_logs | timechart count by status
```
#### 3. **Join Command**
Join data from different searches.
```spl
index=web_logs | join type=inner user_id [search index=user_info | fields user_id, username]
```
#### 4. **Subsearches**
Execute a search within another search.
```spl
index=web_logs [search index=error_logs | return 100 _raw]
```
### Practical Examples
1. **Finding Top 10 Error URLs**
```spl
index=web_logs status=500 | stats count by uri_path | sort -count | head 10
```
2. **Average Response Time by Host**
```spl
index=web_logs | stats avg(response_time) by host
```
3. **Comparing Traffic Over Two Periods**
```spl
index=web_logs earliest=-30d@d latest=-15d@d | stats count as last_15_30_days
| appendcols [ search index=web_logs earliest=-15d@d latest=now | stats count as last_15_days ]
| eval percent_change=((last_15_days-last_15_30_days)/last_15_30_days)*100
```
### Tips for Effective SPL Queries
1. **Use Indexes Wisely:** Always start your search with the appropriate index to improve performance.
2. **Filter Early:** Apply filters early in your query to limit the amount of data Splunk has to process.
3. **Field Selection:** Use `fields` to include only necessary fields and improve search efficiency.
4. **Leverage Summary Indexing:** For large datasets, consider using summary indexing to store precomputed summaries.
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