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Up to 4 Flash Enclosures per System : 48 TB raw per system; DS8886 Dual 8- to 24-core POWER8-based controllers Running SMT-4 for 96 threads; Up to 2 TiB Cache; Can contain up to 1536 HDD or SSD drives + 240 1.8" flash cards in the High-Performance Flash Enclosure (HPFE) 2.5" 10K or 15K RPM drives and enterprise flash SAS-2 drives; 3.5" Nearline ...
Using two readers helps to utilize writers capabilities. "One job as a reader from one pipe and a writer to another" is often seen where this job edits the records. While traditional batch streams often contain such jobs, this kind of processing can be introduced using, for example IBM's DFSORT product or BatchPipeWorks (part of BatchPipes).
Distributed Data Management Architecture (DDM) is IBM's open, published software architecture for creating, managing and accessing data on a remote computer. DDM was initially designed to support record-oriented files; it was extended to support hierarchical directories, stream-oriented files, queues, and system command processing; it was further extended to be the base of IBM's Distributed ...
Systems Network Architecture [1] (SNA) is IBM's proprietary networking architecture, created in 1974. [2] It is a complete protocol stack for interconnecting computers and their resources. SNA describes formats and protocols but, in itself, is not a piece of software.
In computing, a distributed file system (DFS) or network file system is any file system that allows access from multiple hosts to files shared via a computer network. This makes it possible for multiple users on multiple machines to share files and storage resources.
The batch layer precomputes results using a distributed processing system that can handle very large quantities of data. The batch layer aims at perfect accuracy by being able to process all available data when generating views. This means it can fix any errors by recomputing based on the complete data set, then updating existing views.
In a cloud computing environment, failure is the norm, [13] [14] and chunkservers may be upgraded, replaced, and added to the system. Files can also be dynamically created, deleted, and appended. That leads to load imbalance in a distributed file system, meaning that the file chunks are not distributed equitably between the servers.
Quantcast File System (QFS) is an open-source distributed file system software package for large-scale MapReduce or other batch-processing workloads. It was designed as an alternative to the Apache Hadoop Distributed File System ( HDFS ), intended to deliver better performance and cost-efficiency for large-scale processing clusters.