Expert insights. Personalized for you.
Amazon ElastiCache is a fully managed, in-memory caching service for customers to optimize the latency, performance and cost of their read workloads. MORE
The demand for Redis is skyrocketing across dozens of use cases, particularly for cache, queues, geospatial data, and high speed transactions. ScaleGrid, a rapidly growing leader in the Database-as-a-Service (DBaaS) space, has just launched their new fully managed Redis on Azure service. MORE
performance storage spark caching in-memory spark caching spark memoryImprove your Spark memory. In the previous tutorial , we demonstrated how to get started with Spark and Alluxio. MORE
nosql caching memcached database redisMemcached is in-memory key value store whereas Redis is in-memory data structures store. Memcached supports only string data type which is ideal for storing read-only data. Redis supports almost all types of data. MORE
Today AWS has launched Amazon ElastiCache , a new service that makes it easy to add distributed in-memory caching to any application. Amazon ElastiCache handles the complexity of creating, scaling and managing an in-memory cache to free up brainpower for more differentiating activities. MORE
ccache , the compiler cache, is a fantastic way to speed up build times for C and C++ code that I previously recommended. Usually when this happens with ccache, there’s something non-deterministic about the builds that prevents cache hits. With ccache, we can check the cache hit/miss stats with -s , clear the cache with -C , and clear the stats with -z. Let’s see what happens to our build time for subsequent builds with a hot cache: No Cache. MORE
We’re happy to announce that WebP Caching has landed! How Does WebP Caching Work? Enable the Feature for your Zones Cache Key WebP can be enabled for all Pull Zones. Once enabled, a Zone will cache each image separately as WebP and the other image format (e.g. MORE
Generally to cache data (including non-persistent data that never sees a backing store), to share non-persistent data across application services (e.g. Oh, you mean a cache? Yes, a bit like those 2nd-level caches we were talking about earlier, e.g. Ehcache from 2003 onwards. MORE
Users might already have the file cached. If website-a.com links to [link] , and a user goes from there to website-b.com who also links to [link] , then the user will already have that file in their cache. Penalty: Caching. Myth: Cross-Domain Caching. MORE
When it comes to connection pooling in the PostgreSQL world, PgBouncer is probably the most popular option. It’s a very simple utility that does exactly one thing – it sits between the database and the clients and speaks the PostgreSQL protocol, emulating a PostgreSQL server. MORE
You may also like: Java-Distributed Caching in Redis. Local caching is one of the most useful tactics for improving the performance of databases such as Redis. Redis developers who want to do local caching in Java will find that Redis doesn’t support this functionality out of the box. MORE
Note: We received feedback that there was some confusion on us calling this functionality “tail of the log caching” because our documentation and prior history has referred to the tail of the log as the portion of the hardened log that has not been backed up. Tail Of Log Caching. MORE
Compress objects, not cache lines: an object-based compressed memory hierarchy Tsai & Sanchez, ASPLOS’19. Existing cache and main memory compression techniques compress data in small fixed-size blocks, typically cache lines. MORE
performance performance testing performance and monitoring performance tuning performance engineering application scaling performance caching scalability and performance MORE
only to find that the resource they’re requesting isn’t in that PoP ’s cache. MORE
The modes that are important are: “Flat” vs “Cache” In “Flat” mode, MCDRAM memory is used as directly accessible memory, occupying the upper 16 GiB of physical address space. In “Cache” mode, MCDRAM memory is used as an L3 cache for the main DDR4 memory. I will discuss the performance characteristics of Cache mode at a later date. MORE
Computer Architecture Computer Hardware Performance cache DRAM high performance computing memory bandwidth memory latency STREAM benchmark“Memory Bandwidth and System Balance in HPC Systems” If you are planning to attend the SuperComputing 2016 conference in Salt Lake City next month, be sure to reserve a spot on your calendar for my talk on Wednesday afternoon (4:15pm-5:00pm). MORE
The algorithms used by HPL have lots of data re-use (both in registers and from the caches), but the data still has to go to and from memory, so the bandwidth requirement is not zero, which means that at some point in scaling the number of cores or frequency or FP operations per cycle, we are going to run out of the available memory bandwidth. Algorithms Performance arithmetic cache high performance computing memory bandwidth MORE
We’re bound to an inefficient caching strategy: a change to, say, the background colour of the currently-selected day on a date picker used on only one page, would require that we cache-bust the entirety of app.css. MORE
Because microprocessors are so fast, computer architecture design has evolved towards adding various levels of caching between compute units and the main memory, in order to hide the latency of bringing the bits to the brains. MORE
To this end, having a solid caching strategy can make all the difference for your visitors. ?? How is your knowledge of caching and Cache-Control headers? That being said, more and more often in my work I see lots of opportunities being left on the table through unconsidered or even completely overlooked caching practices. Cache-Control. One of the most common and effective ways to manage the caching of your assets is via the Cache-Control HTTP header. MORE
A solution to that problem could be using a cache, but how do you implement it? In that article, I explain how to use a basic cache in Spring Boot. java performance spring boot cacheLet's imagine a web application, where for each request received, it must read some configuration data of a database. That data doesn't change usually, but the application, in each request, must connect, execute the correct instructions to read the data, pick it up from the network, etc. MORE
Depending on how it is configured, Redis can act like a database, a cache or a message broker. Session Cache: Many websites leverage Redis Strings to create a session cache to speed up their website experience by caching HTML fragments or pages. Since data is stored temporarily in the RAM, this attribute makes Redis a perfect choice as a session cache. Learn how to build your own Twitter feed in our Caching tweets using Node.js, Redis and Socket.io MORE
Applications that rely heavily on a data-store usually can benefit greatly from using the Cache-Aside Pattern. If used correctly, this pattern can improve performance and help maintain consistency between the cache and the underlying data store. Lifetime of Cached Data. MORE
Caching is key for the performance of nearly every application. Distributed caching is sometimes needed, but not always. In many cases, a local cache would work just fine, and there’s no need for the overhead and complexity of the distributed cache. So, in many applications, including plain Spring and Spring Boot, you can use @Cacheable on any method and its result will be cached so that the next time the method is invoked, the cached result is returned. MORE
Our UI runs on top of a custom rendering engine which uses what we call a “surface cache” to optimize our use of graphics memory. A full-screen image at this resolution will use 1280 * 720 * 4 = 3.5MB of surface cache. The majority of legacy devices run at 28MB of surface cache. MORE
Redis Cluster is the native sharding implementation available within Redis that allows you to automatically distribute your data across multiple nodes without having to rely on external tools and utilities. At ScaleGrid, we recently added support for Redis Clusters on our platform through our fully managed Redis hosting plans. MORE
Depending on how it is configured, Redis can act like a database, a cache or a message broker. C C++ Caching Clustering Database DevOps Message Broker Redis Redis Cluster Redis Hashes Redis Lists Redis Queues Redis Sets Redis Sorted Sets Redis Strings Use Cases administrator cache data management database databases in-memory key-value store nosql open source queue redis MORE
Given all this, we thought it would be a good opportunity to see how we are doing relative to the competition, and in particular, relative to Microsoft’s AppFabric caching for Windows on-premise servers. Distributed Cache or In-Memory Data Grid? MORE
We would expect a similar shape for any sort of caching mechanism. Nutanix X-Ray caching fio modelingThe fio Pareto parameter allows us to create a workload, which references a very large dataset, but specify a hotspot for the access pattern. MORE
To further exacerbate the problem, the 302 response has a Cache-Control: must-revalidate, private. header , meaning that we will always make an outgoing request for this resource regardless of whether or not we’re hitting the site from a cold or a warm cache. MORE
The previous article described the caching algorithms used by Caffeine , in particular the eviction and concurrency models. This allows for quickly discarding new arrivals that are unlikely to be used again, guarding the main region from cache pollution. cache MORE
Looking beyond distributed caching, it’s their ability to perform data-parallel analysis that gives IMDGs such exciting capabilities. For more than a decade, in-memory data grids (IMDGs) have proven their usefulness for storing fast-changing data in enterprise applications. MORE
It’s one of the things we look at during a health audit, and Kimberly has a great query from her Plan cache and optimizing for adhoc workloads post that’s part of our toolkit. dm_exec_cached_plans. Once a query plan is in cache, it can be re-used. MORE
Caching is extremely useful in order to speed up PHP webpages. In this article, I’ll show you how to make a simple PHP caching system for your web pages. tutorial performance cache page caching MORE
Once the authentication succeeds: PgBouncer checks for a cached connection, with the same username+database combination. If a cached connection is found, it returns the connection to the client. MORE
Monitoring is very essential for modern applications, modern applications are highly distributed in nature and have different dependencies like database, service, caching and many more. Monitor and profile your Spring Boot application! You may also like: Monitoring Using Spring Boot 2.0, MORE
The Tech Hollow , an OSS technology we released a few years ago, has been best described as a total high-density near cache : Total : The entire dataset is cached on each node?—?there there is no eviction policy, and there are no cache misses. MORE
Disk Caching? — ? MezzFS can be configured to cache objects on the local disk. Regional caching? —?Netflix If an application in region A is using MezzFS to read from an object stored in region B, MezzFS will cache the object in region A. MezzFS?—?Mounting MORE
This means that from a cold-cache, if a user were to land on this page for the first time, they’re absolutely going to take a performance hit—there’s just no way around it. MORE
Even if my application runs in the cloud on the JVM, despite all of those software layers abstracting away the underlying hardware, the volatile keyword is still needed due to the cache of the processor that my software runs on. The Volatile Keyword and the Cache of Modern Processors. Modern processors, like the Intel Xeon or the AMD Ryzen, cache the values from the main memory in per-core caches to improve the memory access performance. MORE
Often the data is held in memory by consumers and used as a “total cache”, where it is accessed at runtime by client code and atomically swapped out under the hood. This powers the fallback cache used by the client as detailed above. MORE
Cache Related Topics DZone
NOVEMBER 20, 2019
You may also like: Java-Distributed Caching in Redis. Local caching is one of the most useful tactics for improving the performance of databases such as Redis. Redis developers who want to do local caching in Java will find that Redis doesn’t support this functionality out of the box.
High Scalability
FEBRUARY 25, 2019
The previous article described the caching algorithms used by Caffeine , in particular the eviction and concurrency models. This allows for quickly discarding new arrivals that are unlikely to be used again, guarding the main region from cache pollution. cache
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DZone
AUGUST 12, 2019
Caching is extremely useful in order to speed up PHP webpages. In this article, I’ll show you how to make a simple PHP caching system for your web pages. tutorial performance cache page caching
CSS Wizardry
MARCH 3, 2019
To this end, having a solid caching strategy can make all the difference for your visitors. ?? How is your knowledge of caching and Cache-Control headers? That being said, more and more often in my work I see lots of opportunities being left on the table through unconsidered or even completely overlooked caching practices. Cache-Control. One of the most common and effective ways to manage the caching of your assets is via the Cache-Control HTTP header.
DZone
MAY 6, 2019
Caching is key for the performance of nearly every application. Distributed caching is sometimes needed, but not always. In many cases, a local cache would work just fine, and there’s no need for the overhead and complexity of the distributed cache. So, in many applications, including plain Spring and Spring Boot, you can use @Cacheable on any method and its result will be cached so that the next time the method is invoked, the cached result is returned.
DZone
JUNE 3, 2019
A solution to that problem could be using a cache, but how do you implement it? In that article, I explain how to use a basic cache in Spring Boot. java performance spring boot cacheLet's imagine a web application, where for each request received, it must read some configuration data of a database. That data doesn't change usually, but the application, in each request, must connect, execute the correct instructions to read the data, pick it up from the network, etc.
KeyCDN
JUNE 6, 2019
We’re happy to announce that WebP Caching has landed! How Does WebP Caching Work? Enable the Feature for your Zones Cache Key WebP can be enabled for all Pull Zones. Once enabled, a Zone will cache each image separately as WebP and the other image format (e.g.
ScaleOut Software
MAY 15, 2014
Given all this, we thought it would be a good opportunity to see how we are doing relative to the competition, and in particular, relative to Microsoft’s AppFabric caching for Windows on-premise servers. Distributed Cache or In-Memory Data Grid?
The Morning Paper
MAY 23, 2019
Compress objects, not cache lines: an object-based compressed memory hierarchy Tsai & Sanchez, ASPLOS’19. Existing cache and main memory compression techniques compress data in small fixed-size blocks, typically cache lines.
Addy Osmani
FEBRUARY 17, 2019
bfcache creates a cache allowing for instant navigations to previously-visited pages
DZone
OCTOBER 14, 2019
website load speed website speed wordpress website design and development website speed test in drupal caching with vanish drupal caching wordpress cachingFaster loading? Sign me up!
High Scalability
FEBRUARY 19, 2019
Redis Cluster is the native sharding implementation available within Redis that allows you to automatically distribute your data across multiple nodes without having to rely on external tools and utilities. At ScaleGrid, we recently added support for Redis Clusters on our platform through our fully managed Redis hosting plans.
DZone
NOVEMBER 13, 2019
performance storage spark caching in-memory spark caching spark memoryImprove your Spark memory. In the previous tutorial , we demonstrated how to get started with Spark and Alluxio.
Scalegrid
DECEMBER 19, 2019
Once the authentication succeeds: PgBouncer checks for a cached connection, with the same username+database combination. If a cached connection is found, it returns the connection to the client.
The Netflix TechBlog
JULY 12, 2019
The Tech Hollow , an OSS technology we released a few years ago, has been best described as a total high-density near cache : Total : The entire dataset is cached on each node?—?there there is no eviction policy, and there are no cache misses.
Scalegrid
AUGUST 30, 2019
Depending on how it is configured, Redis can act like a database, a cache or a message broker. Session Cache: Many websites leverage Redis Strings to create a session cache to speed up their website experience by caching HTML fragments or pages. Since data is stored temporarily in the RAM, this attribute makes Redis a perfect choice as a session cache. Learn how to build your own Twitter feed in our Caching tweets using Node.js, Redis and Socket.io
SQL Server According to Bob
NOVEMBER 8, 2016
Note: We received feedback that there was some confusion on us calling this functionality “tail of the log caching” because our documentation and prior history has referred to the tail of the log as the portion of the hardened log that has not been backed up. Tail Of Log Caching.
All Things Distributed
SEPTEMBER 3, 2013
Amazon ElastiCache is a fully managed, in-memory caching service for customers to optimize the latency, performance and cost of their read workloads.
CSS Wizardry
MAY 31, 2019
Users might already have the file cached. If website-a.com links to [link] , and a user goes from there to website-b.com who also links to [link] , then the user will already have that file in their cache. Penalty: Caching. Myth: Cross-Domain Caching.
DZone
AUGUST 16, 2019
performance performance testing performance and monitoring performance tuning performance engineering application scaling performance caching scalability and performance
High Scalability
SEPTEMBER 3, 2019
Depending on how it is configured, Redis can act like a database, a cache or a message broker. C C++ Caching Clustering Database DevOps Message Broker Redis Redis Cluster Redis Hashes Redis Lists Redis Queues Redis Sets Redis Sorted Sets Redis Strings Use Cases administrator cache data management database databases in-memory key-value store nosql open source queue redis
Software Architecture
AUGUST 24, 2017
nosql caching memcached database redisMemcached is in-memory key value store whereas Redis is in-memory data structures store. Memcached supports only string data type which is ideal for storing read-only data. Redis supports almost all types of data.
n0derunner
NOVEMBER 12, 2018
We would expect a similar shape for any sort of caching mechanism. Nutanix X-Ray caching fio modelingThe fio Pareto parameter allows us to create a workload, which references a very large dataset, but specify a hotspot for the access pattern.
High Scalability
OCTOBER 3, 2019
The demand for Redis is skyrocketing across dozens of use cases, particularly for cache, queues, geospatial data, and high speed transactions. ScaleGrid, a rapidly growing leader in the Database-as-a-Service (DBaaS) space, has just launched their new fully managed Redis on Azure service.
High Scalability
JANUARY 8, 2020
When it comes to connection pooling in the PostgreSQL world, PgBouncer is probably the most popular option. It’s a very simple utility that does exactly one thing – it sits between the database and the clients and speaks the PostgreSQL protocol, emulating a PostgreSQL server.
ScaleOut Software
JULY 27, 2018
Looking beyond distributed caching, it’s their ability to perform data-parallel analysis that gives IMDGs such exciting capabilities. For more than a decade, in-memory data grids (IMDGs) have proven their usefulness for storing fast-changing data in enterprise applications.
John McCalpin
DECEMBER 6, 2016
The modes that are important are: “Flat” vs “Cache” In “Flat” mode, MCDRAM memory is used as directly accessible memory, occupying the upper 16 GiB of physical address space. In “Cache” mode, MCDRAM memory is used as an L3 cache for the main DDR4 memory. I will discuss the performance characteristics of Cache mode at a later date.
John McCalpin
OCTOBER 16, 2016
Computer Architecture Computer Hardware Performance cache DRAM high performance computing memory bandwidth memory latency STREAM benchmark“Memory Bandwidth and System Balance in HPC Systems” If you are planning to attend the SuperComputing 2016 conference in Salt Lake City next month, be sure to reserve a spot on your calendar for my talk on Wednesday afternoon (4:15pm-5:00pm).
The Netflix TechBlog
JULY 1, 2019
Our UI runs on top of a custom rendering engine which uses what we call a “surface cache” to optimize our use of graphics memory. A full-screen image at this resolution will use 1280 * 720 * 4 = 3.5MB of surface cache. The majority of legacy devices run at 28MB of surface cache.
DZone
MAY 19, 2019
Even if my application runs in the cloud on the JVM, despite all of those software layers abstracting away the underlying hardware, the volatile keyword is still needed due to the cache of the processor that my software runs on. The Volatile Keyword and the Cache of Modern Processors. Modern processors, like the Intel Xeon or the AMD Ryzen, cache the values from the main memory in per-core caches to improve the memory access performance.
CSS Wizardry
AUGUST 15, 2019
This means that from a cold-cache, if a user were to land on this page for the first time, they’re absolutely going to take a performance hit—there’s just no way around it.
All Things Distributed
AUGUST 22, 2011
Today AWS has launched Amazon ElastiCache , a new service that makes it easy to add distributed in-memory caching to any application. Amazon ElastiCache handles the complexity of creating, scaling and managing an in-memory cache to free up brainpower for more differentiating activities.
John McCalpin
SEPTEMBER 11, 2014
The algorithms used by HPL have lots of data re-use (both in registers and from the caches), but the data still has to go to and from memory, so the bandwidth requirement is not zero, which means that at some point in scaling the number of cores or frequency or FP operations per cycle, we are going to run out of the available memory bandwidth. Algorithms Performance arithmetic cache high performance computing memory bandwidth
The Netflix TechBlog
JUNE 4, 2019
Because microprocessors are so fast, computer architecture design has evolved towards adding various levels of caching between compute units and the main memory, in order to hide the latency of bringing the bits to the brains.
The Morning Paper
JUNE 23, 2019
Generally to cache data (including non-persistent data that never sees a backing store), to share non-persistent data across application services (e.g. Oh, you mean a cache? Yes, a bit like those 2nd-level caches we were talking about earlier, e.g. Ehcache from 2003 onwards.
CSS Wizardry
AUGUST 7, 2019
only to find that the resource they’re requesting isn’t in that PoP ’s cache.
SQL Performance
MAY 22, 2019
It’s one of the things we look at during a health audit, and Kimberly has a great query from her Plan cache and optimizing for adhoc workloads post that’s part of our toolkit. dm_exec_cached_plans. Once a query plan is in cache, it can be re-used.
CSS Wizardry
NOVEMBER 9, 2018
We’re bound to an inefficient caching strategy: a change to, say, the background colour of the currently-selected day on a date picker used on only one page, would require that we cache-bust the entirety of app.css.
DZone
NOVEMBER 25, 2019
Monitoring is very essential for modern applications, modern applications are highly distributed in nature and have different dependencies like database, service, caching and many more. Monitor and profile your Spring Boot application! You may also like: Monitoring Using Spring Boot 2.0,
CSS Wizardry
AUGUST 13, 2019
To further exacerbate the problem, the 302 response has a Cache-Control: must-revalidate, private. header , meaning that we will always make an outgoing request for this resource regardless of whether or not we’re hitting the site from a cold or a warm cache.
The Netflix TechBlog
MARCH 6, 2019
Disk Caching? — ? MezzFS can be configured to cache objects on the local disk. Regional caching? —?Netflix If an application in region A is using MezzFS to read from an object stored in region B, MezzFS will cache the object in region A. MezzFS?—?Mounting
Nick Desaulniers
JUNE 2, 2018
ccache , the compiler cache, is a fantastic way to speed up build times for C and C++ code that I previously recommended. Usually when this happens with ccache, there’s something non-deterministic about the builds that prevents cache hits. With ccache, we can check the cache hit/miss stats with -s , clear the cache with -C , and clear the stats with -z. Let’s see what happens to our build time for subsequent builds with a hot cache: No Cache.
The Netflix TechBlog
OCTOBER 16, 2019
Often the data is held in memory by consumers and used as a “total cache”, where it is accessed at runtime by client code and atomically swapped out under the hood. This powers the fallback cache used by the client as detailed above.
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