“Gerald has been an invaluable member of our SRE team at Alcidion as a DevOps Engineer. Gerald demonstrates exceptional technical skills and problem-solving talent, contributing significantly to our Team's success. Gerald possesses a deep understanding of the complex systems and infrastructure we have deployed and has continuously provided excellent and invaluable guidance and support in the field of cloud infrastructure and Kubernetes. Gerald is an excellent communicator and collaborator, he excels in cross-functional teams, liaising effectively between development, product and operations teams to ensure the successful delivery of all Alcidion's products in the Cloud space. Gerald is a great mentor and has a natural ability to guide their peers, offering valuable insights, advice, and support to help them grow both personally and professionally. They are patient, approachable, and always willing to lend a helping hand, whether it's answering questions, providing guidance on complex technical issues, or offering constructive feedback on projects.”
About
★ Experience deploying container infrastruture, Kubernetes, Rancher, AWS EKS, Azure…
Contributions
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What are effective backup strategies during DNS migration?
Setting a low TTL is a great idea to ensure that downtime is minimised during the DNS cutover. I just want to add that you can verify that the lower TTL is in effect by again using the dig tool. For example dig +noall +answer a google.com. The second column will show you the live TTL in seconds. For a 5 minute TTL, expect to see a value counting down from 300.
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What are effective backup strategies during DNS migration?
I would like to expand on the use of dig for testing the migration, this is a good idea. You can test that the DNS is resolving by using dig @<IP address of new nameserver>, followed by the type of record i.e. A record, and the DNS to look up. This should give you the expected result, if not you can investigate why.
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What are effective backup strategies during DNS migration?
I would like to add that it would be useful to ensure that DNS records are set up on the new Nameservers prior to cut over. It would also help that no new records (A, CNAME, MX, TXT etc) are added to the exisiting Nameservers prior to the cut over, this will ensure that there is consistent snapshot of the current record state.
Activity
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Shopify memo to employees - Emphasizes that effective AI usage is now a "baseline expectation" for all employees. We're all hearing about the…
Shopify memo to employees - Emphasizes that effective AI usage is now a "baseline expectation" for all employees. We're all hearing about the…
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It's that time of year with the latest Talos 2024 Year In Review - which is full of research, threat intelligence and war stories from the Cisco…
It's that time of year with the latest Talos 2024 Year In Review - which is full of research, threat intelligence and war stories from the Cisco…
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Does your business need a Digital Transformation specialist? If your business is looking for a guide on the side to help you navigate emerging tech…
Does your business need a Digital Transformation specialist? If your business is looking for a guide on the side to help you navigate emerging tech…
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Experience
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Education
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Activities and Societies: Fencing
Licenses & Certifications
Courses
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AWS Certified SysOps Administrator - Associate Level
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Languages
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English
Native or bilingual proficiency
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Chinese
Professional working proficiency
Recommendations received
17 people have recommended Gerald
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