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Posted by Anton Kolomyeytsev on May 11, 2016
Storage Replica: Overview

Here is an overview dedicated to disaster recovery, more specific, it’s about the DR capabilities of Microsoft Storage Replica – a new feature of Windows Server 2016. It takes a glance on the DR process itself and then brings a few details of the Storage Replica operation, its features, and peculiarities. They include zero data loss, block-level replication, simple deployment and management, guest and host, SMB3 protocol, high security, high performance, consistency groups, user delegation, network constraint, thin provisioning, etc. The post is, basically, an introduction to a series of experiments also listed on the blog. They were conducted in order to check the functionality and performance of Microsoft Storage Replica in different use cases.

Asynchronous and Synchronous replication

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Posted by Anton Kolomyeytsev on May 10, 2016
SMB3: Overview

This is an overview of the Server Message Block (SMB3) protocol from Microsoft. It offers a short insight into the history of SMB3 creation and development over the years (as the idea is technically around 30 years old). As of Windows Server 2012, the protocol got new features: SMB Transparent Failover, SMB Scale Out, SMB Multichannel, SMB Direct, SMB Encryption, VSS for SMB file shares, SMB Directory Leasing, SMB PowerShell. In Windows Server 2016, it also got Pre-authentication integrity and Cluster dialect fencing. The post concentrates on RDMA-capable SMB Direct and MPIO-utilizing SMB Multichannel and their benefits. Also, it is an introduction to a series of tests aimed at creating SMB 3.0 File Servers in an unusual way.

SMB

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Posted by Anton Kolomyeytsev on November 20, 2015
Storage Spaces Direct: Overview

This is a short summary on Storage Spaces Direct – the first true software-defined storage from Microsoft, its history and peculiarities. Software-defined storage is a concept, which involves storing data without dedicated hardware. This is an introduction to a series of posts dedicated to theoretical and practical research of S2D. The post is not a full description of the Storage Spaces Direct technology, more info is available on Microsoft resources. Our focus here is the actual problem that S2D solved for virtualization world, being truly independent from underlying hardware, as SDS should. Its predecessor, Clustered Storage Spaces, had a very serious hardware lock-in with its requirements for SAS fabrics, SAS switches and SAS JBODS. Thus, Storage Spaces Direct is an interesting technology to research.

JBOD-Scale-Out

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Posted by Anton Kolomyeytsev on October 26, 2015
Log-Structured File Systems: Overview

Log-Structured File System is obviously effective, but not for everyone. As the “benefits vs. drawbacks” list shows, Log-Structuring is oriented on virtualization workload with lots of random writes, where it performs like a marvel. It won’t work out as a common file system for everyday tasks. Check out this overview and see what LSFS is all about.

LSFS

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