lsi jbod

Device FDC # ATA and atapi Devices Device ATA Device atadisk # ata disk drives # Device ataraid # ata raid drives Device atapicd # atapi CDROM drives Device atapifd # atapi floppy drives # Device atapist # atapi tape drives Options ata_static_id # static device numbering # SCSI controllers # Device AHB # EISA aha1742 family # Device AHC # aha2940 and onboard aic7xxx Devices # Device ahd # aha39320/29320 and onboard aic79xx Devices # Device amd # amd 53c974 (tekram DC-390 (t )) # Device ISP # Ql

include search history, browsing behavior, AD click history, and transaction history. Related Technologies: 1. In view of Web browsing history, the user is characterized Based on TF-IDF; 2. For the (user and effect) matrix, clustering is performed based on Latent semantic index (LSI), probability Latent Semantic (plsi), latent Dirichlet allocation (LDA), and other methods; 3. based on the user's click behavior history, the linear Poisson regression a

(because the Aveq is in milliseconds). Await: The average wait time (in milliseconds) for each device I/O operation. Delta (ruse+wuse)/delta (rio+wio) SVCTM: The average service time (in milliseconds) per device I/O operation. That is, Delta (use)/delta (rio+wio)%util: How much time in a second is spent on I/O operations, or how many times in a second I/O queues are non-empty. That is, the delta (use)/s/1000 (because the unit of use is milliseconds) you can see that the utilization

+documentations (tools) + can be fully installed program, composed of a complete set of systems.How to learn Linux1, Calculator introduction and hardware-related knowledge;2, first from the installation and instruction of Linux;3, the basic skills of Linux operating system;4, must learn VI document editor;5, Shell and shell script learning;6, must be software administrators;7, the establishment of the Network Foundation.Virtual machine installation Process1, Network type: Bridge network, use ne

1, after the boot, when entering the following figure, press F1 into the BIOS settings; 2, enter the system settings under the devices and I/O ports submenu, the Configure SATA as value to RAID (Ide/ahci/raid) and save settings, and then restart; 3, in the post will be prompted to press CTRL + C to enter the LSI Logic Config Utility v7.19 Management interface; 4, select the first item: RAID properties and press E

/usr/local/apache/htdocs directory, Do not use the official web send.php and receive.php files.Open the amqp_publisher.php file for modification with the following modified code: Amqp_consumer.php the modified code: Test: Turn on consumer listening: [Root@ip10 htdocs]# php amqp_consumer.php Publisher Post message: [Root@ip10 htdocs]# php amqp_publisher.php ' LSI '; [Root@ip10 htdocs]# php amqp_publisher.php ' Zhangsan ' You can see the

First look at a STM32 clock system block diagram In STM32, there are five clock sources, namely HSI, HSE, LSI, LSE, PLL. HSI internal high-speed RC oscillator clock, 8mhz;hse, external high-speed clock, 4M__16MHZ;LSI, internal low-speed RC clock, 40KHZ; LSE external low-speed clock, 32.768KHZ;PLL PLL Octave, by the figure, can choose Hse/2, HSI/2, HSE, the multiplier coefficient can be 2--16, but do not e

utilization of 1/2, however, if one of the disks on the stripe is damaged, it will affect the entire RAID disk array. At least 4 disks are required.650) this.width=650; "Src=" Http://s2.51cto.com/wyfs02/M00/86/17/wKiom1e0TuHRJI_RAAG2Gkm3Gz4855.png-wh_500x0-wm_3 -wmp_4-s_1782708537.png "title=" qq picture 20160817194505.png "alt=" Wkiom1e0tuhrji_raag2gkm3gz4855.png-wh_50 "/>* RAID 1+0Mirror first, then strip. , this mode also improves the performance of read-write data, has redundancy, the space

, space utilization: at least two pieces of disk C RAID5: Read and write promotion, fault tolerance, allow damage to a disk, space utilization; c-1/c at least three disks Raid0+1: Read and write promotion, fault tolerance, allow damage to a disk, space utilization: at least four pieces of disk C Raid1+0: Read and write promotion, fault tolerance, allow damage to a disk, space utilization: at least four pieces of disk C JBOD: No elevation no fa

First, introduce a web-circulated Yahoo company once used to collect hardware information script, you can view and download hwconfig here. Download Address: Https://github.com/smilejay/shell/blob/master/sh2012/hwconfig. It executes on one of my systems as follows: The code is as follows Copy Code [Root@jay-linux test-programs]#./hwconfigSummary:qci qssc-s4r, 1 x 2.27GHz, 47.1GB/48GB 1067MHz DDR3System:qci qssc-s4rProcessors:1 (of 4) x 2.27GHz 133MHz FSB (HT enabled, c

reliable, but also save the investment of new programs. The disaster-tolerant scheme based on storage virtualization technology emerges. The new virtual disaster recovery solution, using the network's existing transmission capabilities, will be transferred to the remote connected storage systems, all of the above mentioned problems will be solved. By moving data replication functionality from disk groups to network-based, Universal Central storage Service programs, data replication is no longe

technologies, including linear linear link, similar to JBOD technology, can be used to organize multiple disks into a disk, and mirror mirroring technology, The data can be backed up; snapshot is the snapshot volume technology, you can save the system a moment ago, and so on if the system error, need to recover, you can use the snapshot to recover; Multipath Multipath allows the server to have multiple lines to transmit data, and when a problem occur

First, we will introduce a script that yahoo once used to collect hardware information. You can view and download hwconfig here. It is executed on one of my systems as follows:View Code BASH 12345678910111213141516171819 [root@jay-linux test-programs]# ./hwconfig Summary: QCI QSSC-S4R, 1 x 000 2.27GHz, 47.1GB / 48GB 1067MHz DDR3System: QCI QSSC-S4RProcessors: 1(of 4) x 000 2.27GHz 133MHz FSB (HT enabled, 10 cores, 80 threads)Memory: 47.1GB / 48GB 1067MHz DDR3 == 12 x 4

"TechTarget Chinese Original"Microsoft introduced storage Spaces Direct in Windows Server Technical Preview 2. This feature expands local storage to a highly available (HA) storage System.For example, Storage Spaces Direct supports insertion into the PCI Express bus using low-cost, low-performance, high-capacity SATA-like drives and solid-state devices such as SSD and serial storage architectures. This approach is known as nonvolatile memory Express (NVMe) or nonvolatile Storage Control Interfac

What is Windows Server 2012 R2 Storage Spaces? What functions does Storage Spaces provide for data center and Storage management? Storage Spaces Storage space) is Microsoft's answer to Storage virtualization and software-defined Storage, allowing enterprise data centers running Windows Server 2012 and Windows Server 2012 R2 to virtualize shared Storage for configuration and management. Storage space depends on Inexpensive Disk Arrays, rather than proprietary and expensive architectures such as

First, we will introduce a script that yahoo once used to collect hardware information. You can view and download hwconfig here. It runs on one of my systems as follows: ViewCodeBASH12345678910111213141516171819 [root @ jay-linuxtest-programs] #./hwconfig First, we will introduce a script that yahoo once used to collect hardware information. You can view and download hwconfig here. It is executed on one of my systems as follows:View Code BASH 12345678910111213141516171819 [root@jay-l

"alt =" "/> Excellent: minimum resource overhead (depending on the RAID level ); Poor: If a RAID fails, the entire RAID group will be rebuilt. RAID group reconstruction takes a long period of time, resulting in performance degradation; 3. 15 disks are in three RAID groups, and one LUN is output for each RAID group: 650) this. width = 650; "width =" 237 "height =" 158 "border =" 0 "src =" http://www.bkjia.com/uploads/allimg/131228/0154434938-5.png "alt =" "/> Excellent: Three I/O queues are ava

. click start 7. configuration wizard 8.new configuration has three options: clear configuration, new configuration, and add configuration. we select new configuration to clear the old one first, create a new one. 9. select Manual configuration and Redundancy when possible 10. select a disk and Add to Array-> Accept DG-> next; (note that if the disk is JBOD before, change it to Make Unconf Good !!!! This step is required; otherwise, the disk cannot be

) Determine how YARN handles resource allocations Identify the workflow of MapReduce job running on YARN Determine which files you must the change and the How on order to migrate a cluster from the MapReduce version 1 (MRv1) to mapredu CE version 2 (MRV2) running on YARN 3. Hadoop Cluster Planning (16%) Principal points to consider in choosing the hardware and operating systems to host a Apache Hadoop cluster Analyze the choices in selecting an OS Understand kernel tuning and disk

space of multiple disks is combined with a large continuous space;Free space: sum (s1,s2,...) ；Common levels: RAID-0, RAID-1, RAID-5, raid-10,raid-50, JBOD; Soft RAID implementations: MDADM: Provides management interface for soft raid;Add redundancy to the spare disk;Combined with the MD (Multi devices) in the kernel;RAID devices can be named/dev/md0,/dev/md1,/DEV/MD2,/dev/md3, and so on;Implementation of software RAID:Mdadm: a modular to