jbod sas

: Enterprise a online training system, mainly for employees in the enterprise online video training. (2) Existing structure: the customer built the data center to purchase 60M exclusive bandwidth, all dynamic requests and static video files are going to the Internet bandwidth. (3) Pain point: The 60M bandwidth cannot respond to large concurrent requests when the number of users who need training is exploding. Customers also have security requirements for video files and cannot accelerate video a

The storage capacity and scalability of servers have also attracted users' attention. In particular, IT is impossible for small enterprises to purchase independent storage systems in IT applications. Dell, as a server provider that uses the "simplified IT" concept to serve users, uses its PowerEdge series server 2900, uses a 5U Tower Structure and provides large-capacity SAS hard drives for marketing promotions, currently, this wear The storage capaci

Error: ORA-26041: DATETIME/interval data type conversion error. When a problem occurs, you are running a non-English language environment and loading an Oracle that contains a DATE or DATETIME data type in batches. To avoid this problem, set the Oracle date language environment (NLS_DATE_LANGUAGE) in English or the United States. On UNIX platforms, a shell script can be used as a package to set the pre-Batch loading environment for calling Oracle: (The following content/Path // SASCreate a fil

Name Configuration description Remarks Hardware environment Standard memoryComputing node Ibm flex system x240 computing node-2 E5-2690 CPUs (2.9 GHz/8-core) total 16 cores-128 GB rdimm ddr3 memory-Two 300 GB 10 krpm hot swapping SAS Disks-4 1 GB Ethernet ports-Two FDR 56 GB InfiniBand Network Ports Floating Point peak computing capability7,424 gflops,320 CPU cores in total Large MemoryComputing node

Liunx Disk Management1 , the first hard drive/DEV/SDA the second block/dev/sdb the third block/DEV/SBCInstalled before the system is generally installed RAID,LVM not commonly usedPartition----> Format-mounted disksThe first partition/dev/sda1 and so on2 , Disk classification: mechanical disks, solid-state drives3 ,free-m query MemorySystem real Memory is Buffers/cachebuffers to write buffers, Sync writes buffers buffer data to diskCache to read the cache, the data in the disk is read out and sto

resource data storage, video, will use SAS or SSD disk, If the data is large, you can take a hot spot to split the method: such as: the most frequently accessed 10-20% using SSD storage, the middle of the 20-30% using SAS disk, the final 40-50% can be used cheap sata.Seventh Floor: Tens PV Station if the design is reasonable, 1, 2 NFS servers will suffice. I maintain (part-time) or experienced over the ten

(Taobao filesystem, Taobao file System) was officially online. The cluster size used in the production environment reached 200 PC servers (146g*6 SAS 15K Raid5), the number of files reached billion levels, system deployment storage capacity: 140 TB, actual storage capacity: TB, single support random ioPS 200+, 3MBps traffic. Taobao cluster File System TFS 1.0 First edition of the logical architecture, the biggest feature of TFS is to hide part of th

appropriate file system for the hard drive (formatted only as logical partition) (FDISK or parted)3. Mount the hard drive device/DEV/SDA to a file directory on the Linux system/opt/nsfocus/sda1 (Mount)four. Naming rules when a hard disk is mapped in Linux :The hard drive device is named, the SAS interface is Sda/sdb/sdc/...,ide interface for hda/hdb/hdc/...,The logical partition for one device is named sda1/sda2/..., or/hda1/hda2/...: multiple partit

provides a similar architecture to the SAN and operates at the file level. Figure 2. Major storage Architectures direct-attached storage Linux supports a large variety of DAS interfaces, including old standards like parallel advanced technology Attachment (at A)-integrated Drive Electronics [Ide]/ata-parallel SCSI, and Fibre Channel as well as new storage interfaces like serial a Ttached SCSI (SAS), serial ATA (SATA), and external SATA (ESATA). You'l

First, IntroductionFlashcache is a block device write-back cache kernel module developed for the Linux operating system, using device Mapper, the purpose of which is to accelerate the read and write performance of SAS disk with SSD by Flashcache module, and provide the IOPS of SAS disk. This module is open source by Facebook, source code address: Https://github.com/facebook/flashcacheIi. Environmental Notes

@后面一直到“.”之间的，在这里是hitpattern1 = re.compile(p1)print pattern1.findall(key)Output results[‘@hit.‘]Added a "?" We changed the greedy "+" to the lazy "+". This is also true for [abc]+,\w* and the like]. Quiz: The above example can not use lazy match, think of a way to get the same result * * Personal advice: When you use the "+", "*", you must first think about whether the greedy type or lazy type, especially when you use a larger range of items, because it is likely to be more matching

: http://blog.sina.com.cn/s/blog_65efeb0c0100htz7.html Common normal test methods for SPSS and SAS Common normal test methods for SPSS and SAS Many analytical methods of measurement data require that the data distribution is normal or approximate normal, so it is necessary to test the original independent data for normality. By plotting the frequency distribution histogram of the data, the normality of data

faster data rate (10MHZ) and a wider bus (bits). Called Fast/wide, SCSI-2 allowed data transfer rates up to MB/s with backward compatibility and SCSI-1, albeit at the SCSI-1 data rate. The development of SCSI-3 began in 1993 and is actually a collection of standards defining, protocols, command sets, and Si Gnaling methods. Under the moniker SCSI-3, you'll find a collection of parallel SCSI standards with the name Ultra and modern serial ased protocols such as the IEEE 1394 (FireWire), Fibre C

You may have heard of R. Perhaps you've read an article like Sam Siewert's "Big Data in the cloud". You probably know that R is a programming language and you know it's about statistics, but is it right for you? Why do you choose R? R can perform statistics. You can see it as a competitor to analysis systems such as SAS Analytics, not to mention simpler packages such as StatSoft Statistica or Minitab. Many of the professional statisticians and metho

dependency, the container will handle the message as follows: 1. Reject this request by sending a 481 error response 2. Routing this request or response is likely to have different life cycles for different application instances in the same application path. The container handles a subsequent request and response to a conversation ... Hahaha!~ all written nonsense Ah! You only need to set a property value (HELD) when you receive 182, as a token, when you receive an ACK, Judge Ack.getsession ()

Status = 220110310 01:53:19 Element Name = Disk Drive Bay 1 Cable sas B 0: Connected20110310 01:53:19 Element Op Status = 220110310 01:53:19 Element Name = Disk Drive Bay 1 Cable sas B 0: Config Error20110310 01:53:19 Element Op Status = 220110310 01:53:19 Element Name = Disk Drive Bay 1 Cable sas a 0: Connected20110310 01:53:19 Element Op Status = 220110310 01:

, forced face to answer. Focus on the statistics/Big Data/Data science field AH. Stata there is nothing comparable. Don't say Stata. SAS are losing their comparability. Python and R each have their own good. Simply put, these two tools are CS and statistical two genre-heavy tools. Compared to python more can reflect the thinking of CS, and R for the statistics of people is basically carrying a theory to the implementation of an application. This, of c

Create nowSet-AzureRmVMExtension requiredSettingString andProtectedSettingString。 Open the text file editor and create two json files to save the private settings and public settings respectively. In this example, the names are ProtectSetting_Linux_Mooncake.json and PublicConfig_Linux_Mooncake_base64code.json. Private settings The content of ProtectSetting_Linux_Mooncake.json is as follows. Set the followingStorageAccountName andReplace storageAccountKey with your storage account and

===========================================================Raid===========================================================Installing the Software#rpm-IVH http://192.168.97.250/rpms/storcli-1.04.07-1.noarch.rpmView#/opt/megaraid/storcli/storcli64/c0/vall Show#/opt/megaraid/storcli/storcli64/c0/eall/sall ShowChange RAID write policy to always write back,c0 = control 0, V0 = Vd0,vall = All the VD#/opt/megaraid/storcli/storcli64/c0/vall Set WRCACHE=AWB#/opt/megaraid/storcli/storcli64/c0/v0 Set WRCAC

Centos 7 mounts a raid 10 hard drive to the Dell R730 Server The company purchased a new Dell R730 server with two SAS hard disks and four SATA hard disks respectively. SAS hard disks constitute RAID 1 and SATA constitute raid 10. Install Centos 7 on the server and set RAID in the BIOS during installation. When installing Centos, choose to install the system on the SAS