A mechanism is provided in a data processing system for reliable asynchronous solid-state device based de-duplication. Responsive to receiving a write request to write data to the file system, the mechanism sends the write request to the file system,…

BACKGROUND OF THE INVENTION Solid-state memory devices encompass rewritable non-volatile memory devices which may use electronic circuitry for storing data. Currently, solid-state memory devices start replacing conventional storage devices such as ha…

A method for garbage collection in a solid state drive (SSD) includes determining whether the SSD is idle by a garbage collection module of the SSD; based on determining that the SSD is idle, determining a victim block from a plurality of memory bloc…

2018-06-11 17:50:36,896 WARN org.apache.hadoop.hdfs.server.namenode.FSNamesystem: Encountered exception loading fsimageorg.apache.hadoop.hdfs.server.common.InconsistentFSStateException: Directory /home/hdfs/name is in an inconsistent state: storage d…

这周我看了<Inside Solid State Device>一书,了解了解SSD作为软件的补充. 固态硬盘区别于将数据以磁形式存储的机械硬盘,使用了一种名为NAND的闪存颗粒,以电信号的形式存储数据.存储介质利用半导体的特性,以高低电平来标记数据的类型.NAND颗粒又以最小存储单元的堆叠形式不同而分为SLC(single-level cell)颗粒.MLC (multi-level cell)颗粒和TLC(triple-level cell)颗粒.单个slc存储单元有0和1两种充电值,(高…

固态硬盘(Solid State Drives) 学习了:https://baike.baidu.com/item/%E5%9B%BA%E6%80%81%E7%A1%AC%E7%9B%98/453510?fr=aladdin 一般它擦写次数普遍为3000次左右,以常用的64G为例,在SSD的平衡写入机理下,可擦写的总数据量为64G X 3000 = 192000G,假如你是个变态视频王每天喜欢下载视频看完就删每天下载100G的话,可用天数为192000 / 100 = 1920,也就是 1920…

        note:写这个或许算是翻译,又或算是对这个论文[1]的理解,又或者仅仅是我的看法.         这篇论文和IOFlow相比較,更加注重软件定义存储的框架(利用已有的框架来创建新的框架,然后使用已有的协议),而不是像IOFlow那样注重通信的协议.而且,这个框架还是软件定义环境的框架,而不不过存储的框架,不过全文注重说了存储(更有挑战性).特别地.关于可软件定义的存储逻辑.从这里能够管中窥豹. SDE软件定义环境 数据中心的环境包含Compute.Network和Storag…

Solid-state storage management for a system, the management including establishing, externally to a solid-state storage board, a correspondence between a first logical address and a first physical address on solid-state storage devices located on the…

BACKGROUND OF THE INVENTION A SSD apparatus is a large-capacity data storage device using a nonvolatile semiconductor memory such as a NAND flash memory. The SSDapparatus has an interface which is the same as a magnetic recording hard disk drive (HDD…

ASM安全 这个小节主要描写叙述与ASM相关的各种安全配置话题,像 配置ASM须要的userids.groupids:ASM权限如 SYSOPER,SYSDBA和新的SYSASM权限,最后还有ASM 使用的ORACLEpassword文件,orapwd. 一个ASM实例多个UNIX Userids 假设使用一个不同于RDBMS实例的用户和独立的ASM_HOME, 那么每一个RDBMS实例的ORACLE 用户必须是ASM实例dba组的 成员:ASM的ORACLE用户不必是RDBMS实例DBA组的成…