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Upgrade an Arabic vbulletin 3.x to 5.x and convert it's mysql data from cp1256/latin1 to utf8

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Back in 2009 internet was full of community forums to the point where every person would install forum and make his own community especially here in Iraq. a lot of communities were powered by vbulletin software and most of them died. however there are some sites that still up today. Last week I was tasked to upgrade one of those sites from vbulletin 3.8 to vbulletin 5.7 . so I grabbed a copy of its database, Started an upgrade simulation and BOOM nothing works as intended. Let me explain a step by step process, first of all the vbulletin 5.7 requires mysql 8.0 to actually work but vbulletin 3.8 won't work on mysql 8.0 because it sets utf-8 chraset on new connections so you have edit vbulletin 3.8 config file located here includes/config.php Uncomment and modify this line as shown below $config['Mysqli']['charset'] = 'latin1'; The above line shall run your vbulletin 3.8 on mysql 8.0 without gibberish characters. Why latin1 ? Si...
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CEPH Bluestore WAL/DB on Software RAID1 for redundancy

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As you may already know CEPH is not recommended to be installed over hardware/software RAID due to performance issues. but in this scenario and I will quote CEPH documentation : If there is a mix of fast and slow devices (spinning and solid state), it is recommended to place block.db on the faster device while block (data) lives on the slower (spinning drive). https://docs.ceph.com/en/octopus/rados/configuration/bluestore-config-ref/ The block.db/wal if added on faster device (ssd/nvme) and that fast device dies out you will lose all OSDs using that ssd. And based on your used CRUSH rule such event might lose all your data. so the best solution to mitigate such event is to use RAID1 for that fast device holding your block.db/wal data. If you have hardware RAID then it should be an easy task but if you don't have hardware RAID then I used this on one of my implementations:/ # Assuming we have 1TB HDD OSD pvcreate /dev/sdc # change 01 to 02 for your second OSD v...
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