uncleflo
Registered since September 28th, 2017
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Solo Cave Diving and UK Sump Conditions | Cave Diving Group
Saved by uncleflo on January 17th, 2022.
The CDG believes that their cave diving procedures, developed by continuous improvement over 70 years, represent the best way to produce a well trained, intelligent and alert diver. Solo cave diving in the UK can trace its roots back to early dives by Graham Balcombe and Jack Sheppard in Swildon’s Hole in 1934. The procedures developed in the 30’s were formalised by the founding of the Cave Diving Group in 1946. A constant theme throughout the existence of the CDG has been to adapt materials and methods to the job in hand and to be open to continuous improvement. Cave diving has become extremely popular throughout the world. Florida is one of the regions blessed with many cave diving sites of outstanding quality and easy access. Consequently, there has been an explosion of popularity in cave diving in the USA. It is estimated that there are as many as 20,000 cave and cavern divers in Florida alone. These divers are organised into a number of national bodies including the National Speleological Society, Cave Diving Section and the National Association for Cave Diving. The generally agreed advice from this wealth of experience is that cave diving in the USA should be conducted by teams of divers in a buddy system and that solo cave diving introduces an unnecessary level of risk. Despite this advice the Cave Diving Group continues to recommend solo cave diving as the safer alternative for UK sump conditions. Why is that?
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AWS Aurora MySQL – HA, DR, and Durability Explained in Simple Terms - Percona Database Performance Blog
Saved by uncleflo on July 11th, 2019.
It’s a few weeks after AWS re:Invent 2018 and my head is still spinning from all of the information released at this year’s conference. This year I was able to enjoy a few sessions focused on Aurora deep dives. In fact, I walked away from the conference realizing that my own understanding of High Availability (HA), Disaster Recovery (DR), and Durability in Aurora had been off for quite a while. Consequently, I decided to put this blog out there, both to collect the ideas in one place for myself, and to share them in general. Unlike some of our previous blogs, I’m not focused on analyzing Aurora performance or examining the architecture behind Aurora. Instead, I want to focus on how HA, DR, and Durability are defined and implemented within the Aurora ecosystem. We’ll get just deep enough into the weeds to be able to examine these capabilities alone.
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Sailing Uma - THE MOTOR
Saved by uncleflo on February 24th, 2019.
Many people have written in and commented that an electric motor is only good for day sailors who weren’t going very far each day, and that you need a reliable diesel engine for long distance cruising. But we feel like the opposite is true. Since we don’t have a dock to tie up to and charge our batteries each night, we rely on sailing to recharge our system. The longer we sail and the more sun we get, the more power we make. Because we don’t have a 9-5 to return to at the end of a fun weekend out on the boat, we have no schedules requiring that we make it back to the dock on time, no matter what the wind is doing. So, we feel that an electric motor, depending on your sailing style, can be adapted to any boat. But, you have to be willing to work around the one major draw back, range.
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Redundancy Get It Right | TimelessTime
Saved by uncleflo on June 4th, 2014.
John Harvey-Jones, the business guru and former head of ICI, in his book Making it Happen: Reflections on Leadership, said that he never regarded a dismissal as the employee’s fault but rather that of ICI’s management. Since he was the top guy, he regarded every instance when he had to let staff go as his fault. Whilst it never does to beat one’s self up over every business decision, it is a good starting point. If management consider that it’s their fault that people have to be made redundant, it means that there is the necessary level of humility in place, and it is likely therefore that the motivation is there to treat staff fairly. Fair treatment and due process are the tenets needed to secure a simple, sound redundancy and one over which there can be little if any cause for a staff member to take an employment tribunal case.
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21.2. The Z File System (ZFS)
Saved by uncleflo on September 20th, 2013.
The Z file system, originally developed by Sun™, is designed to use a pooled storage method in that space is only used as it is needed for data storage. It is also designed for maximum data integrity, supporting data snapshots, multiple copies, and data checksums. It uses a software data replication model, known as RAID-Z. RAID-Z provides redundancy similar to hardware RAID, but is designed to prevent data write corruption and to overcome some of the limitations of hardware RAID.
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