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De idea a implementación con Varnish Plus
En esta sesión presentaremos un escenario completo, basado en experiencias reales, en el que intervienen elementos exclusivos de Varnish Plus. Algunos de estos elementos fueron ya mencionados en sesiones previas y aquí veremos su uso en la práctica.
انظمه التحكم ف الابواب
توفر الشركة جميع الأنظمة والمنتجات الخاصة بالتحكم فى البوابات والجراجات والهيئات والمؤسسات, فمن أجل الراحة والامان يمكنك التحكم فيها عن بعد باستخدام الريموت كنترول, حيث يمكنك التحكم فى :
بوابات الجراجات.
بوابات الفيلات.
بوابات المصانع.
مداخل ومخارج الهيئات والمؤسسات.
• حيث تتعامل الشركة مع كبرى الشركات وأشهر الماركات العالمية المتخصصة فى أنظمة البوابات والجراجات
تقدم الشركة ضمان على جميع الأجهزة لمدة سنة ضد عيوب الصناعة من تاريخ التركيب.
تقدم الشركة خدمات التركيب والبرمجة والصيانة والتدريب على استخدام جميع الأجهزة.
تقدم الشركة خدمة عقود صيانة بعد انتهاء فترة الضمان بأسعار خاصة لجميع العملاء.
نعتني بعملائنا الكرام ونقدم لهم أعلي مستوي من خدمة ما بعد البيع.
للاستعلام
منال زين
01118455507 - 01206001014
صفحتنا على الفيس بوك :
https://www.facebook.com/United.Communication.Systems
Email : Unitedtch@gmail.com
Secretarias, la mano derecha del poder.
Este documento describe el papel de las secretarias en las grandes empresas. Las secretarias son un poder oculto que controlan la agenda de los ejecutivos, son testigos de grandes operaciones y saben más del negocio que muchos ejecutivos. A pesar de los avances tecnológicos, las secretarias siguen siendo esenciales para filtrar peticiones, dar prioridad a temas urgentes y ayudar a los ejecutivos a enfocarse.
A Novel Algorithm for Acoustic and Visual Classifiers Decision Fusion in Audi...
Audio-visual speech recognition (AVSR) using acoustic and visual signals of speech have received attention recently because of its robustness in noisy environments. Perceptual studies also support this approach by emphasizing the importance of visual information for speech recognition in humans. An important issue in decision fusion based AVSR system is how to obtain the appropriate integration weight for the speech modalities to integrate and ensure the combined AVSR system’s performances better than that of the audio-only and visual-only systems under various noise conditions. To solve this issue, we present a genetic algorithm (GA) based optimization scheme to obtain the appropriate integration weight from the relative reliability of each modality. The performance of the proposed GA optimized reliability-ratio based weight estimation scheme is demonstrated via single speaker, mobile functions isolated word recognition experiments. The results show that the proposed scheme improves robust recognition accuracy over the conventional unimodal systems and the baseline reliability ratio-based AVSR system under various signal to noise ratio conditions.
MSE
This document summarizes the Massive Storage Engine 2.0, which was built to address scaling issues with file- and memory-based backends in handling workloads with gigabytes of content. It features allocation that is fragmentation-proof and can scale to over 100 terabytes, with an LFU eviction approach. The architecture uses threads for reliable allocation across multiple segments with reduced locking. It also supports an optional persistent datastore by mirroring metadata to disk in an asynchronous manner with minimal impact to performance. Evaluation showed it handles larger files well and recovers quickly from crashes by reading the stored book of metadata.
Recommended
De idea a implementación con Varnish Plus
En esta sesión presentaremos un escenario completo, basado en experiencias reales, en el que intervienen elementos exclusivos de Varnish Plus. Algunos de estos elementos fueron ya mencionados en sesiones previas y aquí veremos su uso en la práctica.
انظمه التحكم ف الابواب
توفر الشركة جميع الأنظمة والمنتجات الخاصة بالتحكم فى البوابات والجراجات والهيئات والمؤسسات, فمن أجل الراحة والامان يمكنك التحكم فيها عن بعد باستخدام الريموت كنترول, حيث يمكنك التحكم فى :
بوابات الجراجات.
بوابات الفيلات.
بوابات المصانع.
مداخل ومخارج الهيئات والمؤسسات.
• حيث تتعامل الشركة مع كبرى الشركات وأشهر الماركات العالمية المتخصصة فى أنظمة البوابات والجراجات
تقدم الشركة ضمان على جميع الأجهزة لمدة سنة ضد عيوب الصناعة من تاريخ التركيب.
تقدم الشركة خدمات التركيب والبرمجة والصيانة والتدريب على استخدام جميع الأجهزة.
تقدم الشركة خدمة عقود صيانة بعد انتهاء فترة الضمان بأسعار خاصة لجميع العملاء.
نعتني بعملائنا الكرام ونقدم لهم أعلي مستوي من خدمة ما بعد البيع.
للاستعلام
منال زين
01118455507 - 01206001014
صفحتنا على الفيس بوك :
https://www.facebook.com/United.Communication.Systems
Email : Unitedtch@gmail.com
Secretarias, la mano derecha del poder.
Este documento describe el papel de las secretarias en las grandes empresas. Las secretarias son un poder oculto que controlan la agenda de los ejecutivos, son testigos de grandes operaciones y saben más del negocio que muchos ejecutivos. A pesar de los avances tecnológicos, las secretarias siguen siendo esenciales para filtrar peticiones, dar prioridad a temas urgentes y ayudar a los ejecutivos a enfocarse.
A Novel Algorithm for Acoustic and Visual Classifiers Decision Fusion in Audi...
Audio-visual speech recognition (AVSR) using acoustic and visual signals of speech have received attention recently because of its robustness in noisy environments. Perceptual studies also support this approach by emphasizing the importance of visual information for speech recognition in humans. An important issue in decision fusion based AVSR system is how to obtain the appropriate integration weight for the speech modalities to integrate and ensure the combined AVSR system’s performances better than that of the audio-only and visual-only systems under various noise conditions. To solve this issue, we present a genetic algorithm (GA) based optimization scheme to obtain the appropriate integration weight from the relative reliability of each modality. The performance of the proposed GA optimized reliability-ratio based weight estimation scheme is demonstrated via single speaker, mobile functions isolated word recognition experiments. The results show that the proposed scheme improves robust recognition accuracy over the conventional unimodal systems and the baseline reliability ratio-based AVSR system under various signal to noise ratio conditions.
MSE
This document summarizes the Massive Storage Engine 2.0, which was built to address scaling issues with file- and memory-based backends in handling workloads with gigabytes of content. It features allocation that is fragmentation-proof and can scale to over 100 terabytes, with an LFU eviction approach. The architecture uses threads for reliable allocation across multiple segments with reduced locking. It also supports an optional persistent datastore by mirroring metadata to disk in an asynchronous manner with minimal impact to performance. Evaluation showed it handles larger files well and recovers quickly from crashes by reading the stored book of metadata.
Weather
The document describes different weather conditions in English and Polish, including sunny, hot, windy, cloudy, cold, raining, snowing, and foggy. It also includes a poem about bees making honey and bears eating honey in different weather. There is a quiz at the end to match weather conditions in English and Polish.
Lightning fast with Varnish
The document provides an overview of using Varnish to accelerate web applications. Some key points:
- Varnish works by caching responses from backend servers in memory for future requests, reducing load on backends. It respects HTTP caching best practices like expiration, conditional requests, and cache variations.
- Configuration is done through Varnish Configuration Language (VCL) scripts which control caching behavior. Common tasks covered include setting cache rules, purging content, and normalizing requests.
- Techniques discussed include caching only safe requests, stripping cookies, blacklisting/whitelisting URLs, and using Edge Side Includes (ESI) to break pages into cacheable components. Guidelines are provided for optimizing caching of dynamic content.
Varnish TLS
Hitch TLS is a small and fast TLS terminator that is bundled with Varnish Plus. It allows client-side TLS termination with Varnish Cache Plus handling encryption and decryption. TLS can also be used to encrypt connections to backends by adding ".ssl = 1" to backend definitions in Varnish. Hitch TLS supports features like OCSP stapling, PROXY protocol, and run-time reloads for updating certificates without interrupting service. Performance testing shows it can handle high throughput workloads with good scalability on commodity hardware.
VCL - the logic and logistics
VCL provides flexibility to define caching policies for web applications. It allows customizing caching behavior through logic statements and conditions. The document discusses using VCL to implement caching strategies and avoid common mistakes like caching incorrect or expired content.
Debugging varnish
This document discusses using varnishlog to debug VCL code that is not behaving as expected. It provides examples of how to use varnishlog to investigate 500 responses, misses, timing details, and requests over 5 seconds. It also discusses timestamps in varnishlog output and how they can help debug timing issues. Examples are given for reproducing issues using varnishtest. The document encourages reaching out for support and exploring panic dumps and core files if Varnish crashes.
E-commerce use case
Sheego originally built their e-commerce site on Intershop but moved to the OXID framework, which does not have built-in caching like Intershop. In 2014, Sheego started using open-source Varnish caching to improve site performance and in 2015 upgraded to Varnish Plus for professional support, monitoring tools, and high availability capabilities. This has led to advanced caching, less staff time needed for monitoring and support, and improved availability of content for their customers.
Varnish cache en ocho pasos
Este documento presenta 8 pasos progresivos para implementar Varnish Cache y acelerar aplicaciones web de forma incremental, desde simplemente usarlo como balanceador de carga hasta implementar caché avanzada y composición de contenido. Explica conceptos como el lenguaje de configuración VCL, modos como sólo pass-through, almacenar recursos estáticos y contenido semi-estático, compresión, grace mode, auto-purgado y sofisticadas estrategias de invalidación de caché.
Access control
This document discusses different access control methods for purging content in Varnish, including IP-based access control, basic authentication, and cookie-based access control. It argues that cookie-based access control provides the optimal solution, describing how to generate and authenticate random cookies signed with a secret key to control access. The document then outlines how this approach is used to build a "Varnish auth tool kit" or "VARNISH PAYWALL" system for metered or subscription-based access control of content.
De idea a implementación con Varnish Plus
El documento describe las diferentes etapas de implementación de una caché Varnish para el sitio web stockphotos.com, incluyendo la configuración inicial de Varnish, el uso de almacenamiento en masa (MSE) y alta disponibilidad (HA), la adición de SSL/TLS, el monitoreo y registro, y el control de acceso mediante rate limiting y autenticación. También se discuten técnicas adicionales como pruebas A/B, detección de dispositivos y monetización de descargas.
VCL - the logic and logistics
VCL is the configuration language for Varnish Cache that describes a state machine for requests. It compiles to C code for fast execution. The presentation discusses VCL compilation, debugging techniques like checking return values and hashes, coding best practices like using functions and avoiding regex, and testing VCL configurations.
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Weather
The document describes different weather conditions in English and Polish, including sunny, hot, windy, cloudy, cold, raining, snowing, and foggy. It also includes a poem about bees making honey and bears eating honey in different weather. There is a quiz at the end to match weather conditions in English and Polish.
Lightning fast with Varnish
The document provides an overview of using Varnish to accelerate web applications. Some key points:
- Varnish works by caching responses from backend servers in memory for future requests, reducing load on backends. It respects HTTP caching best practices like expiration, conditional requests, and cache variations.
- Configuration is done through Varnish Configuration Language (VCL) scripts which control caching behavior. Common tasks covered include setting cache rules, purging content, and normalizing requests.
- Techniques discussed include caching only safe requests, stripping cookies, blacklisting/whitelisting URLs, and using Edge Side Includes (ESI) to break pages into cacheable components. Guidelines are provided for optimizing caching of dynamic content.
Varnish TLS
Hitch TLS is a small and fast TLS terminator that is bundled with Varnish Plus. It allows client-side TLS termination with Varnish Cache Plus handling encryption and decryption. TLS can also be used to encrypt connections to backends by adding ".ssl = 1" to backend definitions in Varnish. Hitch TLS supports features like OCSP stapling, PROXY protocol, and run-time reloads for updating certificates without interrupting service. Performance testing shows it can handle high throughput workloads with good scalability on commodity hardware.
VCL - the logic and logistics
VCL provides flexibility to define caching policies for web applications. It allows customizing caching behavior through logic statements and conditions. The document discusses using VCL to implement caching strategies and avoid common mistakes like caching incorrect or expired content.
Debugging varnish
This document discusses using varnishlog to debug VCL code that is not behaving as expected. It provides examples of how to use varnishlog to investigate 500 responses, misses, timing details, and requests over 5 seconds. It also discusses timestamps in varnishlog output and how they can help debug timing issues. Examples are given for reproducing issues using varnishtest. The document encourages reaching out for support and exploring panic dumps and core files if Varnish crashes.
E-commerce use case
Sheego originally built their e-commerce site on Intershop but moved to the OXID framework, which does not have built-in caching like Intershop. In 2014, Sheego started using open-source Varnish caching to improve site performance and in 2015 upgraded to Varnish Plus for professional support, monitoring tools, and high availability capabilities. This has led to advanced caching, less staff time needed for monitoring and support, and improved availability of content for their customers.
Varnish cache en ocho pasos
Este documento presenta 8 pasos progresivos para implementar Varnish Cache y acelerar aplicaciones web de forma incremental, desde simplemente usarlo como balanceador de carga hasta implementar caché avanzada y composición de contenido. Explica conceptos como el lenguaje de configuración VCL, modos como sólo pass-through, almacenar recursos estáticos y contenido semi-estático, compresión, grace mode, auto-purgado y sofisticadas estrategias de invalidación de caché.
Access control
This document discusses different access control methods for purging content in Varnish, including IP-based access control, basic authentication, and cookie-based access control. It argues that cookie-based access control provides the optimal solution, describing how to generate and authenticate random cookies signed with a secret key to control access. The document then outlines how this approach is used to build a "Varnish auth tool kit" or "VARNISH PAYWALL" system for metered or subscription-based access control of content.
De idea a implementación con Varnish Plus
El documento describe las diferentes etapas de implementación de una caché Varnish para el sitio web stockphotos.com, incluyendo la configuración inicial de Varnish, el uso de almacenamiento en masa (MSE) y alta disponibilidad (HA), la adición de SSL/TLS, el monitoreo y registro, y el control de acceso mediante rate limiting y autenticación. También se discuten técnicas adicionales como pruebas A/B, detección de dispositivos y monetización de descargas.
VCL - the logic and logistics
VCL is the configuration language for Varnish Cache that describes a state machine for requests. It compiles to C code for fast execution. The presentation discusses VCL compilation, debugging techniques like checking return values and hashes, coding best practices like using functions and avoiding regex, and testing VCL configurations.