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It's often necessary to access the historical values of some property. But sometimes this history itself needs to be modified in response to retroactive updates. MORE
254 Tim finishes his article by looking at how highly effective organizations design their engineering organization to optimize for effectiveness and feedback loops. MORE
At ThoughtWorks, we regularly use Pair Programming. We find it's a rarely used practice, in part due to lack of knowledge in how to do it well and because its benefits are not immediately obvious. MORE
We've come across many clients who are interested in taking the computational notebooks developed by their data scientists, and putting them directly into the codebase of production applications. My colleague David Johnston points out that while data science ideas do need to move out of notebooks and into production, trying to deploy that notebooks as a code artifact breaks a multitude of good software practices. Predictably, that results in a number of observed pain points. MORE
Over the last few months, my colleague Unmesh Joshi has been running workshops to teach developers about distributed systems design. In this work he's been delving into many open-source distributed systems and identifying patterns. As he writes them up, he's publishing the patterns on my site. MORE
Clients send requests to servers but might not get a response. It's impossible for clients to know if the response was lost or the server crashed before processing the request. To make sure that the request is processed, the client has to re-send the request. MORE
While a Lamport Clock is often necessary to order events in a distributed system, clients often need to know the actual times too. The Hybrid Clock , Unmesh's next pattern, combines these two demands. MORE
Last year, my colleague Zhamak Dehghani introduced the notion of the Data Mesh , shifting from the notion of a centralized data lake to a distributed vision of data. MORE
A Lamport Clock is effective to order events on a single server, but with multiple servers we need a vector of version numbers to detect concurrent updates. more…. skip-home-page MORE
159 
When you are using Leaders and Followers, you can use Follower Reads to achieve better throughput and lower latency. However there is always a replication lag between the leader and the followers, so you may need to take action to preserve consistency. more…. skip-home-page MORE
164 
Developers integrate their work by pulling from mainline, merging, and - if healthy - pushing back into mainline. more…. skip-home-page MORE
282 
My colleague Tim Cochran has helped many software engineering organizations transform to respond faster to changing market needs. MORE
In my conversations with software developers, a regular topic of controversy is how manage source code branching. Tools like git make it easy to create branches, but managing them to improve coordination and minimize the costs of integration unearths plenty of difficulties. MORE
My colleagues do a lot of work that involves replacing legacy software systems. Three of my colleagues - Ian Cartwright, Rob Horn, and James Lewis - have started to capture their experience and advice for this is a collection of patterns. MORE
Cluster nodes need exclusive access to certain resources. But nodes can crash; they can be temporarily disconnected or experiencing a process pause. Under these error scenarios, they should not keep the access to a resource indefinitely. more…. skip-home-page MORE
In the latest part of his collection of Patterns of Distributed Systems, Unmesh faces the problem of a server failing in the middle of a complex update. MORE
Next distributed system pattern from Unmesh is the Lamport Clock. Distributed systems can't assume that time is consistent between servers, and sometimes time goes backwards. Yet it's important to have some way to order events. more…. skip-home-page MORE
To do effective legacy displacement, we need to figure out how to break down the problem into manageable pieces. Extract Product Lines does this by identifying product lines and using them as the basis for migration. more…. skip-home-page MORE
Coup 53 is a recent documentary of the American-led coup against Mohammad Mosaddegh, the leader of Iran in 1953. It's a worthwhile telling of an oft-overlooked piece of history, even if the meta-narrative that drives the documentary isn't properly examined. MORE
275 
During 2011-2012 there was a small but significant revolution in how we worked at ThoughtWorks. When we needed to communicate while separated we used to do telephone meetings, but within a year the telephone disappeared and we started using video calls instead. MORE
There are arguments about whether a testing portfolio should be a pyramid or more like honeycomb. My second biggest issue with this argument is that it's rendered opaque by the fact that it's not clear what people see as the difference between unit and integration tests. MORE
Clients are interested in changes to the specific values on the server. It's difficult for clients to structure their logic if they need to poll the server continuously to look for changes. If clients open too many connections to the server for watching changes, it can overwhelm the server. more…. MORE
The second branching pattern in my article is Mainline: a single, shared, branch that acts as the current state of the product. more…. skip-home-page MORE
286 
When we are using Leader and Followers, we need to ensure that messages between the leader and each follower are kept in order, with a retry mechanism for any lost messages. MORE
A single log file can grow and become a performance bottleneck while its read at the startup. Older logs are cleaned up periodically and doing cleanup operations on a single huge file is difficult to implement. A Segmented Log splits the logfile into smaller files. MORE
Tim continues his comparison of high and low effectiveness organizations by comparing their key feedback loops. To improve these, organizations need to understand the importance of micro feedback loops, which are often neglected because they are so small. more…. skip-home-page MORE
Recently there's been a lot of interest, indeed hype, around building developer productivity platforms. Done well, they make it easier for developers to build systems aligned with the technology strategy and allow them to build useful features more quickly. MORE
Most programmers have personal projects that do important things for them personally, but never have enough time and energy to keep them in good condition. Clare is no exception, and needed to spend time getting such an unruly codebase back into line. MORE
About three-and-a-half years ago I bought a Kinesys Advantage2 ergonomic keyboard. This tool isn't cheap, and it's rather unusual in its layout. But I use a keyboard all day, so I wanted one that maximized my comfort and enjoyment at my work. I've found it a worthwhile investment. MORE
Over the last few months, my colleague Unmesh Joshi has been running workshops to teach developers about distributed systems design. In this work he's been delving into many open-source distributed systems and identifying patterns. As he writes them up, he's publishing the patterns on my site. MORE
Unmesh Joshi is completing another batch of his series on Patterns of Distributed Systems. First of these is Gossip Dissemination , which uses a random selection of nodes to pass on information to ensure it reaches all the nodes in the cluster without flooding the network. MORE
Martin Fowler
JULY 20, 2021
My colleagues do a lot of work that involves replacing legacy software systems. Three of my colleagues - Ian Cartwright, Rob Horn, and James Lewis - have started to capture their experience and advice for this is a collection of patterns.
Martin Fowler
APRIL 27, 2021
Recently there's been a lot of interest, indeed hype, around building developer productivity platforms. Done well, they make it easier for developers to build systems aligned with the technology strategy and allow them to build useful features more quickly.
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Martin Fowler
JUNE 23, 2021
Next distributed system pattern from Unmesh is the Lamport Clock. Distributed systems can't assume that time is consistent between servers, and sometimes time goes backwards. Yet it's important to have some way to order events. more…. skip-home-page
Martin Fowler
APRIL 7, 2021
It's often necessary to access the historical values of some property. But sometimes this history itself needs to be modified in response to retroactive updates.
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Martin Fowler
JANUARY 5, 2021
My colleague Tim Cochran has helped many software engineering organizations transform to respond faster to changing market needs.
Martin Fowler
JULY 21, 2021
To do effective legacy displacement, we need to figure out how to break down the problem into manageable pieces. Extract Product Lines does this by identifying product lines and using them as the basis for migration. more…. skip-home-page
Martin Fowler
JANUARY 19, 2021
Clients are interested in changes to the specific values on the server. It's difficult for clients to structure their logic if they need to poll the server continuously to look for changes. If clients open too many connections to the server for watching changes, it can overwhelm the server. more….
Martin Fowler
DECEMBER 3, 2020
Last year, my colleague Zhamak Dehghani introduced the notion of the Data Mesh , shifting from the notion of a centralized data lake to a distributed vision of data.
Martin Fowler
JULY 1, 2021
When you are using Leaders and Followers, you can use Follower Reads to achieve better throughput and lower latency. However there is always a replication lag between the leader and the followers, so you may need to take action to preserve consistency. more…. skip-home-page
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Martin Fowler
JUNE 29, 2021
A personal note on why I wish to give up doing talks.
Martin Fowler
JUNE 29, 2021
A Lamport Clock is effective to order events on a single server, but with multiple servers we need a vector of version numbers to detect concurrent updates. more…. skip-home-page
Martin Fowler
JUNE 17, 2021
Unmesh Joshi is completing another batch of his series on Patterns of Distributed Systems. First of these is Gossip Dissemination , which uses a random selection of nodes to pass on information to ensure it reaches all the nodes in the cluster without flooding the network.
Martin Fowler
AUGUST 18, 2020
About three-and-a-half years ago I bought a Kinesys Advantage2 ergonomic keyboard. This tool isn't cheap, and it's rather unusual in its layout. But I use a keyboard all day, so I wanted one that maximized my comfort and enjoyment at my work. I've found it a worthwhile investment.
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Martin Fowler
AUGUST 4, 2020
Over the last few months, my colleague Unmesh Joshi has been running workshops to teach developers about distributed systems design. In this work he's been delving into many open-source distributed systems and identifying patterns. As he writes them up, he's publishing the patterns on my site.
Martin Fowler
AUGUST 4, 2020
Over the last few months, my colleague Unmesh Joshi has been running workshops to teach developers about distributed systems design. In this work he's been delving into many open-source distributed systems and identifying patterns. As he writes them up, he's publishing the patterns on my site.
Martin Fowler
JANUARY 26, 2021
Tim finishes his article by looking at how highly effective organizations design their engineering organization to optimize for effectiveness and feedback loops.
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Martin Fowler
AUGUST 30, 2020
Coup 53 is a recent documentary of the American-led coup against Mohammad Mosaddegh, the leader of Iran in 1953. It's a worthwhile telling of an oft-overlooked piece of history, even if the meta-narrative that drives the documentary isn't properly examined.
Martin Fowler
AUGUST 13, 2020
A single log file can grow and become a performance bottleneck while its read at the startup. Older logs are cleaned up periodically and doing cleanup operations on a single huge file is difficult to implement. A Segmented Log splits the logfile into smaller files.
Martin Fowler
JANUARY 6, 2021
Tim continues his comparison of high and low effectiveness organizations by comparing their key feedback loops. To improve these, organizations need to understand the importance of micro feedback loops, which are often neglected because they are so small. more…. skip-home-page
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Martin Fowler
JANUARY 13, 2021
Cluster nodes need exclusive access to certain resources. But nodes can crash; they can be temporarily disconnected or experiencing a process pause. Under these error scenarios, they should not keep the access to a resource indefinitely. more…. skip-home-page
Martin Fowler
APRIL 21, 2020
The second branching pattern in my article is Mainline: a single, shared, branch that acts as the current state of the product. more…. skip-home-page
Martin Fowler
APRIL 20, 2020
In my conversations with software developers, a regular topic of controversy is how manage source code branching. Tools like git make it easy to create branches, but managing them to improve coordination and minimize the costs of integration unearths plenty of difficulties.
Martin Fowler
APRIL 14, 2020
Most programmers have personal projects that do important things for them personally, but never have enough time and energy to keep them in good condition. Clare is no exception, and needed to spend time getting such an unruly codebase back into line.
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Martin Fowler
APRIL 23, 2020
Developers integrate their work by pulling from mainline, merging, and - if healthy - pushing back into mainline. more…. skip-home-page
Martin Fowler
JUNE 23, 2021
While a Lamport Clock is often necessary to order events in a distributed system, clients often need to know the actual times too. The Hybrid Clock , Unmesh's next pattern, combines these two demands.
Martin Fowler
MARCH 19, 2020
During 2011-2012 there was a small but significant revolution in how we worked at ThoughtWorks. When we needed to communicate while separated we used to do telephone meetings, but within a year the telephone disappeared and we started using video calls instead.
Martin Fowler
AUGUST 19, 2020
When we are using Leader and Followers, we need to ensure that messages between the leader and each follower are kept in order, with a retry mechanism for any lost messages.
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Martin Fowler
JANUARY 26, 2021
Clients send requests to servers but might not get a response. It's impossible for clients to know if the response was lost or the server crashed before processing the request. To make sure that the request is processed, the client has to re-send the request.
Martin Fowler
AUGUST 11, 2020
In the latest part of his collection of Patterns of Distributed Systems, Unmesh faces the problem of a server failing in the middle of a complex update.
Martin Fowler
JANUARY 15, 2020
At ThoughtWorks, we regularly use Pair Programming. We find it's a rarely used practice, in part due to lack of knowledge in how to do it well and because its benefits are not immediately obvious.
Martin Fowler
NOVEMBER 18, 2020
We've come across many clients who are interested in taking the computational notebooks developed by their data scientists, and putting them directly into the codebase of production applications. My colleague David Johnston points out that while data science ideas do need to move out of notebooks and into production, trying to deploy that notebooks as a code artifact breaks a multitude of good software practices. Predictably, that results in a number of observed pain points.
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