Prepare TAS Datastore server (TAS 8)

Prepare the TAS Datastore server to host the customer index and data.

The procedures for server preparation are based on third party software which is subject to change. The instructions as such are to be considered as a suggested method for server preparation. Alternative commands may be used. In addition, it is possible that some of the commands may not be necessary as your servers may already have the required software.

Before you begin

Prepare TAS Application server (TAS 8)

Procedure

Create the data directory to store the index, configuration, log, and transaction log files, and assign the required permissions:
1. Create the /<data_folder> directory:
  Copy
```
mkdir -p /<data_folder>
```
  where:
  
  <data_folder> is the folder defined for data storage, and is by default opt/app/data.
  
  If you require a different data directory, you must define it in the Site Preparation Checklist.
2. Assign the TAS user group and the tas_app user as the owner of the directory:
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```
chown -R tas_app:tas /<data_folder>
```
3. Assign the following permissions:
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```
chmod -R 770 /<data_folder>
```
Schedule a cron job in CronTab to purge log files:
1. Edit the current CronTab:
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```
crontab -e
```
2. Add the line to purge the log files every 30 minutes:
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```
30 * * * * find /<data_folder>/log -type f -mtime +15 -delete
```
Configure the Text Indexing Service (TINS):
1. Open the /etc/sysctl.conf file and add the following line:
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```
vm.swappiness=1
```
2. Create the /tas directory:
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```
mkdir -p /etc/tuned/tas
```

Create and configure a defrag file:

Go to the /etc/tuned/tas directory.
Create the huge_pages_defrag.sh file:
Copy
```
vi huge_pages_defrag.sh
```

Add the following content to the file and save it:

Copy

#!/bin/sh
. /usr/lib/tuned/functions
start() {
     echo never > /sys/kernel/mm/transparent_hugepage/defrag
    return 0
}
stop() {
   return 0
}
process $@

In /etc/tuned/tas, create and edit the tuned.conf configuration file:
1. Create the tuned.conf file:
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```
vi tuned.conf
```
2. Add the following content to the file and save it:
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```
[main]
include=throughput-performance
[vm]
transparent_hugepages=always
[sysctl]
vm.swappiness = 1
[script]
script=huge_pages_defrag.sh
```
3. Create the tas profile and enable it:
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```
tuned-adm profile tas
```
4. Open the /etc/security/limits.conf file and add the following lines to the end of the file:
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```
* soft nofile 60000
* hard nofile 60000
```
Optional. Install diagnostic tools for troubleshooting:
Copy
```
yum -y install sysstat htop iotop iftop sysbench collectl
```

What to do next

Configure TAS Datastore servers for high availability