Taskbar Latency and Kernel Calls

Randon ASCII

I get cranky when databases do 4-KiB reads but this is amazing. I work quickly on my computer and I get frustrated when I am forced to wait on an operation that should be fast. A persistent nuisance on my over-powered home laptop is that closing windows on the taskbar is slow.

Bandwidth or Latency: When to Optimise for Which

CSS Wizardry

When it comes to network performance, there are two main limiting factors that will slow you down: bandwidth and latency. Latency is defined as…. Where bandwidth deals with capacity, latency is more about speed of transfer 2. and reduction in latency. more than latency.

SLOG: serializable, low-latency, geo-replicated transactions

The Morning Paper

SLOG: serializable, low-latency, geo-replicated transactions Ren et al., That’s where SLOG (Serializable LOw-latency, Geo-replicated transactions) comes in. VLDB’19. SLOG is another research system motivated by the needs of the application developer (aka, user!).

How to Improve MySQL AWS Performance 2X Over Amazon RDS at The Same Cost

Scalegrid

AWS is the #1 cloud provider for open-source database hosting, and the go-to cloud for MySQL deployments. As organizations continue to migrate to the cloud, it’s important to get in front of performance issues, such as high latency, low throughput, and replication lag with higher distances between your users and cloud infrastructure. ScaleGrid also maintains 53% lower latency on average throughout the entire MySQL AWS performance tests. Read-Intensive Latency.

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PostgreSQL Connection Pooling: Part 1 – Pros & Cons

Scalegrid

In that environment, the first PostgreSQL developers decided forking a process for each connection to the database is the safest choice. It would be a shame if your database crashed, after all.

How to Improve MySQL AWS Performance 2X Over Amazon RDS at The Same Cost

High Scalability

AWS is the #1 cloud provider for open-source database hosting, and the go-to cloud for MySQL deployments. As organizations continue to migrate to the cloud, it’s important to get in front of performance issues, such as high latency, low throughput, and replication lag with higher distances between your users and cloud infrastructure.

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Distributed Algorithms in NoSQL Databases

Highly Scalable

These developments gradually highlight a system of relevant database building blocks with proven practical efficiency. In this article I’m trying to provide more or less systematic description of techniques related to distributed operations in NoSQL databases. Read/Write latency.

Database Technology in a Blockchain World

VoltDB

At first glance, it may seem like a new type of database. However, a closer look shows that blockchain and translytical databases are better together. Blockchain as a Database Isn’t Enough for the Enterprise. NewSQL Databases for Blockchain Innovation.

IPA: invariant-preserving applications for weakly consistent replicated databases

The Morning Paper

IPA: invariant-preserving applications for weakly consistent replicated databases Balegas et al., VLDB’19. IPA for developers, happy days!

Microservices, events, and upside-down databases

O'Reilly Software

Back then, the most common pattern I saw for service-based systems was sharing a database among multiple services. The rationale was simple: the data I need is already in this other database, and accessing a database is easy, so I’ll just reach in and grab what I need.

Key Considerations for a Modern Database to Operate at Scale

VoltDB

The performance consists of two aspects: throughput and latency. Humans will wait much longer than an API will since APIs have strict latency expectations due to timeouts. But in most cases in modern applications, the application expectation is far less than the baked-in latency.

A one size fits all database doesn't fit anyone

All Things Distributed

A common question that I get is why do we offer so many database products? To do this, they need to be able to use multiple databases and data models within the same application. Seldom can one database fit the needs of multiple distinct use cases. The days of the one-size-fits-all monolithic database are behind us, and developers are now building highly distributed applications using a multitude of purpose-built databases. Purpose-built databases.

PostgreSQL Connection Pooling: Part 1 – Pros & Cons

High Scalability

In that environment, the first PostgreSQL developers decided forking a process for each connection to the database is the safest choice. It would be a shame if your database crashed, after all. A long time ago, in a galaxy far far away, ‘threads’ were a programming novelty rarely used and seldom trusted. Since then, a lot of water has flown under that bridge, but the PostgreSQL community has stuck by their original decision.

Amazon DynamoDB ? a Fast and Scalable NoSQL Database.

All Things Distributed

a Fast and Scalable NoSQL Database Service Designed for Internet Scale Applications. Today is a very exciting day as we release Amazon DynamoDB , a fast, highly reliable and cost-effective NoSQL database service designed for internet scale applications. DynamoDB is the result of 15 years of learning in the areas of large scale non-relational databases and cloud services. s Dynamo technology , which was one of the first non-relational databases developed at Amazon.

Connecting MongoDB to Ruby with Self-Signed Certificates for SSL

Scalegrid

Our yml file: development: # Configure available database clients. Alternatively, you can define the following: # # Define the name of the default database that Mongoid can connect to. # (required). database: test # Provide the hosts the default client can connect to. The user's database roles. is :plain) auth_mech: :scram # The database or source to authenticate the user against.

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How to Improve MySQL AWS Performance 2X Over Amazon RDS at The Same Cost

DZone

AWS is the #1 cloud provider for open-source database hosting, and the go-to cloud for MySQL deployments. cloud performance sql aws mysql amazon replication latency amazon rds throughputImprove AWS performance!

Titan Graph Database Integration with DynamoDB: World-class Performance, Availability, and Scale for New Workloads

All Things Distributed

It opens up the possibility to enjoy the value that graph databases bring to relationship-centric use cases, without worrying about managing the underlying storage. Traditionally, these connections have been stored in relational databases, with each object type requiring its own table.

Embrace event-driven computing: Amazon expands DynamoDB with streams, cross-region replication, and database triggers

All Things Distributed

I am excited to share with you that today we are expanding DynamoDB with streams, cross-region replication, and database triggers. In traditional database architectures, database engines often run a small search engine or data warehouse engines on the same hardware as the database.

Time to First Byte: What It Is and Why It Matters

CSS Wizardry

The first—and often most surprising for people to learn—thing that I want to draw your attention to is that TTFB counts one whole round trip of latency. The reason is because mobile networks are, as a rule, high latency connections.

Scalable MicroService Architecture

VoltDB

But that fully self sufficient nature means that each of these services have their own end-to-end full stack of technology, including database. In these use cases, data processing usually has less than a 5 milliseconds latency budget.

Expanding the Cloud: Faster, More Flexible Queries with DynamoDB

All Things Distributed

While DynamoDB already allows you to perform low-latency queries based on your tableâ??s This gives you the ability to perform richer queries while still meeting the low-latency demands of responsive, scalable applications. All Things Distributed.

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HCI Performance testing made easy (Part 3)

n0derunner

It is very common to have large resource-hungry databases separated across nodes using anti-affinity rules. In such a case we have a Bandwidth heavy workload profile (reporting) sharing with a Latency Sensitive workload (transactional).

5 Steps to Accelerate your Cloud Migration with Dynatrace

Dynatrace

Database & functional migration. Remember: This is a critical aspect as you do not want to migrate a service and suddenly introduce high latency or costs to a system that you forgot about having a dependency with! Step 4: Smart Database Migration. Which Database to migrate?

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Optimize Citrix platform performance and user experience with a new extension (Preview)

Dynatrace

Dynatrace Extension: database performance as experienced by the SAP ABAP server. Citrix platform performance—optimize your Citrix landscape with insights into user load and screen latency per server. Tie latency issues to host and virtualization infrastructure network quality.

Procella: unifying serving and analytical data at YouTube

The Morning Paper

That’s hard for many reasons, including the differing trade-offs between throughput and latency that need to be made across the use cases. Oh, and in additional to low latency, “ we require access to fresh data.”

Expanding the Cloud - Introducing the AWS Asia Pacific (Tokyo.

All Things Distributed

Japanese companies and consumers have become used to low latency and high-speed networking available between their businesses, residences, and mobile devices. The advanced Asia Pacific network infrastructure also makes the AWS Tokyo Region a viable low-latency option for customers from South Korea. a Fast and Scalable NoSQL Database Service Designed for Internet Scale Applications. Job Openings in AWS - Senior Leader in Database Services. All Things Distributed.

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Expanding the Cloud - New AWS Region: US-West (Northern.

All Things Distributed

This new Region consists of multiple Availability Zones and provides low-latency access to the AWS services from for example the Bay Area. a Fast and Scalable NoSQL Database Service Designed for Internet Scale Applications. Job Openings in AWS - Senior Leader in Database Services.

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Fast key-value stores: an idea whose time has come and gone

The Morning Paper

Coupled with stateless application servers to execute business logic and a database-like system to provide persistent storage, they form a core component of popular data center service archictectures. This eliminates marshalling costs to reduce CPU usage, and eliminates network latency.

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Tuning SQL Server Reporting Services

SQL Performance

Many database administrators find themselves having to support instances of SQL Server Reporting Services (SSRS), or at least the backend databases that are required for SSRS. The ReportServer database is encrypted and certain operations require restoring the symmetric key.

How to maximize CPU performance for PostgreSQL 12.0 benchmarks on Linux

HammerDB

HammerDB doesn’t publish competitive database benchmarks, instead we always encourage people to be better informed by running their own.

GraphQL Search Indexing

The Netflix TechBlog

Specifically, how our team uses the relationships and schemas defined within GraphQL to automatically build and maintain a search database. Each service could potentially implement its own search database, but then we would still need an aggregator.

Expanding the Cloud ? Provisioned IOPS for Amazon RDS - All.

All Things Distributed

Following the huge success of being able to provision a consistent, user-requested I/O rate for DynamoDB and Elastic Block Store (EBS), the AWS Database Services team has now released Provisioned IOPS, a new high performance storage option for the Amazon Relational Database Service (Amazon RDS). Amazon RDS Provisioned IOPS is intended for applications that need predictable performance and have database workloads that generate largely random I/O. All Things Distributed.

Stuff The Internet Says On Scalability For November 23rd, 2018

High Scalability

Delay is Not an Option: Low Latency Routing in Space , Murat ). Wake up! It's HighScalability time: Curious how SpaceX's satellite constellation works? Here's some fancy FCC reverse engineering magic. Do you like this sort of Stuff? Please support me on Patreon. I'd really appreciate it.

Stuff The Internet Says On Scalability For December 21st, 2018

High Scalability

Whether it’s database or message queues it’s a really weird combo of licenses and features for hostage. Tim Bray : How to talk about [Serverless Latency] · To start with, don’t just say “I need 120ms.” Wake up!

Testing MySQL 8.0.16 on Skylake with innodb_spin_wait_pause_multiplier

HammerDB

Note that the main developer of HammerDB is Intel employee (#IAMINTEL) however HammerDB is a personal open source project and HammerDB has no optimization whatsoever for a database running on any particular architecture. In the recent MySQL 8.0.16

MezzFS?—?Mounting object storage in Netflix’s media processing platform

The Netflix TechBlog

in Atlas , Netflix’s in-memory dimensional time series database. And shaving off hours is especially beneficial in latency sensitive workflows, like encoding videos that are released on Netflix the day they are shot. MezzFS?—?Mounting

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The Anna Key-Value Store Now Has 355x the Performance of DynamoDB for the Dollar

High Scalability

New databases used to be announced seemingly every week. While database neogenesis has slowed down considerably, it has not gone necrotic. To meet user-defined goals for performance (request latency) and cost, the monitoring service tracks and adjusts resources to workload changes.

Declarative recursive computation on an RDBMS

The Morning Paper

Declarative recursive computation on an RDBMS… or, why you should use a database for distributed machine learing Jankov et al., Today’s paper choice, subtitled “ Why you should use a database for distributed machine learning ” seeks to fill that gap.

Failure Modes and Continuous Resilience

Adrian Cockcroft

Collecting some critical metrics at one second intervals, with a total observability latency of ten seconds or less matches the human attention span much better. A resilient system continues to operate successfully in the presence of failures.

Seer: leveraging big data to navigate the complexity of performance debugging in cloud microservices

The Morning Paper

Last time around we looked at the DeathStarBench suite of microservices-based benchmark applications and learned that microservices systems can be especially latency sensitive, and that hotspots can propagate through a microservices architecture in interesting ways.

How to improve Redo, Transaction Log and WAL throughput for HammerDB benchmarks

HammerDB

If you are new to running Oracle, SQL Server, MySQL and PostgreSQL TPC-C workloads with HammerDB and have needed to investigate I/O performance the chances are that you have experienced waits on writing to the Redo, Transaction Log or WAL depending on the database you are testing.

Choosing a cloud DBMS: architectures and tradeoffs

The Morning Paper

With regard to external storage, you could use S3 with remote storage accessible over a REST API, or block-based storage with EBS and Instance Store (InS), with EBS being the closest match for traditional database systems. Choosing a cloud DBMS: architectures and tradeoffs Tan et al.,

Choosing Consistency - All Things Distributed

All Things Distributed

Amazon SimpleDB has launched today with a new set of features giving the customer more control over which consistency and concurrency models to use in their database operations. These new features will make it easier to transition those applications to SimpleDB that are designed with traditional database tools in mind. Achieving strict consistency can come at a cost in update or read latency, and may result in lower throughput. Lowest read latency. Higher read latency.

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