sas forks

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

Iii. What did Winlogon do before and after login? If you set "Secure Login", a SAS (Secure Attention Sequence ?? Security Warning sequence ). SAS is a group of key combinations. The default value is Ctrl-Alt-Delete. It ensures that the information entered during interactive login is accepted by the system and not obtained by other programs. Therefore, using "Secure Login" to log on ensures that the user's a

, playing MySQL cluster and Oracle RAC need better hardware and a lot of maintenance costs after deployment, therefore, to take into account the number of visits here is still very large, then congratulations, At least tens of millions of or even billions of PV. Like Baidu and other giant companies in addition to the regular MySQL and Oracle database Library, will be in the performance requirements of the area, a lot of use of NoSQL database, and then the front-end in the DNS, load balancing,

protocol is used to ensure compatibility with Windows NT.6. KDC ServiceKDC (Kerberos Key Distribution Center ?? Kerberos Key Distribution Center) is used in collaboration with the Kerberos authentication protocol to verify User Logon within the entire Active Directory. If you do not have a Windows NT Computer in the domain, you can only use the Kerberos protocol to ensure maximum security. This service can be enabled only after the Active Directory Service is started.7. Active Directory Service

need to change the track, or the change time is very short; for random I/O, if this I/O is too large, the head will not stop changing, resulting in a great reduction in efficiency. 4. Sequential/concurrent I/O In terms of concept, concurrent I/O refers to sending an I/O command to a disk without waiting for it to respond, and then sending an I/O command to another disk. For a striped RAID (Lun), I/O operations on it are concurrent, such as RAID 0 + 1 (1 + 0) and RAID 5. Otherwise, it is sequent

time. It is expected that, in the future, the price of Dell will continue to decrease as the channel supply is stable. 4. inspur: announcing the latest quote for July In this issue, inspur announced the latest server quotation in July 1, from which it can be seen that there is no change in the configuration of four rack servers. The price remains relatively high. The specific situation is: Nf8520 series has two, do not think appropriate and use E7-4807 (1.86g) and E7-4820 (2.00g)

better than Windows NT + IIS to run ASP, while Apache is slightly more dominant. The existing version can process more than 10000 operations (one request is one operation) within one second on a high-performance host ). Therefore, enterprises select the appropriate software platform and hardware based on application development requirements. At present, computer development is very fast, and mainstream Xeon multi-core technologies can meet the needs of 0.1 million of users. At the same time,

Depends on the drive type, not the size, but the disk type. Drive Type = SAS, FC, SATA, Nl-sas, Flash 1. AX-Can not be plugged in, either all plug in SAS, or all plug sata. 2. Cx3/cx4-Can not be mixed plug, can only plug the same interface type of disk. 3. VNX-can be plugged in, SAS, Nl-

, playing MySQL cluster and Oracle RAC need better hardware and a lot of maintenance costs after deployment, therefore, to take into account the number of visits here is still very large, then congratulations, At least tens of millions of or even billions of PV.Giant companies like Baidu, in addition to the regular MySQL and Oracle database Library, will be in higher performance requirements of the field, a large number of nosql Database, and then the front-end in the DNS, load balancing, distr

connection between two entities that use IPSec (a host or router) that defines how an entity uses security services, such as encryption, to communicate. It consists of the following elements: 1 security Parameter index SPI;2) IP destination address; 3 security protocol.An SA is a one-way logical connection, that is, in one communication, IPSEC needs to establish two SAS, one for inbound traffic and the other for outbound traffic. If a host, such as a

Powerful companies such as IBM,Oracle, Sybase, CA, NCR, Informix, Microsoft, and SAS have launched their own data warehousing solutions (through acquisitions or research and development). Professional software companies such as Bo and Brio also have a place in the front-end online analytical processing tools market. The following is an analysis and comparison of the performance and characteristics of these data warehousing solutions. IBM offers a sui

: 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

drive), and in the Select a Disk to install or Upgrade dialog box, choose the location where you want to store the operating system, as shown in 2-1-3. In this list, the "local" list shows the local disk or local storage for the server, and "remote" displays the server's remotely stored devices, typically a storage device that is connected via FC or SAS. On the current server, the local hard drive has a 2.27TB (this is the disk after the RAID10 of 6

2007, TFS (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

3fipython/data/config/ Change_run.py-s $parameter 2-a Start 3, through the tools such as vim to modify the configuration file, note that if there are deleted files, after RM is also executed, commit.sh RM FILENAME (relative path) 4, after the modification of the latest configuration sh commit.sh changeinfo PRODUCTNAME Here are two parameters to do the following Changeinfo: This operation you modified what PRODUCTNAME: You modified the configuration of which project here the script will a

Python API 2.0Starting with 2.0 things is more complicated, but you get more discrete and readable classes:#!/usr/bin/env pythonImport JSONFrom collections Import NamedtupleFrom Ansible.parsing.dataloader Import DataloaderFrom Ansible.vars import VariablemanagerFrom Ansible.inventory Import InventoryFrom Ansible.playbook.play Import playFrom Ansible.executor.task_queue_manager import TaskqueuemanagerFrom Ansible.plugins.callback import callbackbaseClass Resultcallback (Callbackbase):"" Example c

Description There is a apple tree outside of Kaka ' s house. Every autumn, a lot of apples would grow in the tree. Kaka likes Apple very much, so he has been carefully nurturing the Big Apple tree. The tree has N forks which is connected by branches. Kaka numbers the forks by 1 to N and the root are always numbered by 1. Apples'll grow on the forks and both Appl