40g sfp

1. High-capacity Devices The network traffic of the data center is characterized by high-density Application Scheduling and burst buffering. Common switches cannot precisely identify and control services for interconnection purposes, in large business situations, quick response and zero packet loss cannot be achieved, and business continuity cannot be guaranteed. The reliability of the system mainly depends on the reliability of the equipment. As a result, common switches cannot meet the needs o

-only.[Email protected] ~]# ls/dev/sd*/dev/sda/dev/sda1/dev/sda2/dev/sda3/dev/sda4/dev/sda5Partition has 3 to mount the other two partition extensions/directoriesFormat for Partition 3Mkfs.xfs/dev/sd3Mount SD3 to/below 123Mount-t xfs/dev/sd3/123DF-HT View[Email protected] 123]# DF-HTMount OKExpand Our/CatalogueView PVs FirstAdd our 4 partitions and 5 partitions into PVPvcreate/dev/sd4Pvcreate/dev/sd5Add two PV to a VGVgextend CL/DEV/SDA4Vgextend Cl/dev/sda5View VG There's more free now.VGS ViewN

the maximum recommended memory Here I adjust to 2048MB to install (My computer's memory is 8G, considering to use the virtual machine to do the calculation on the increase), click "Next";Pop-up dialog box, this step is to select the virtual machine installed after the Windows Xp system network configuration, for the convenience of everyone, we recommend the second item "Use Network address translation (NAT)", click "Next";Pop-up dialog, this step is to choose which type of SCSI controller, choo

Hard disk boxed, inserted in the computer USB interface, the computer normally recognized to move the hard drive, but because the new hard disk is not partitioned, in the "My Computer" is not see the letter. Below the 40G removable hard disk partition to tell how the hard drive partitions. 1. The operating system is best windowsxp,win2000 can also (basic and XP like), 98, ME is no such zoning method. Right-click My Computer on the desktop and choose

Now a lot of friends with the machine, hard disk capacity is at least 20G, 40G or 60G, and some even 80, 100G. To manage the use of large hard drives reasonably and efficiently, you need to have some skills. Some friends of the machine in a few days on the system is unstable, had to reload the system, or the need for a long time to find files to find. Reasonable partitioning is the basic condition for system stability and standard management of hard d

Symptom: Temporary table space problem has been reported missing 3 times, customers are also annoyed, the first two are colleagues add 5G data files, has reached 40G, occupy temporary table space is mainly distinct and group by and the Union all table data in 200W, It's not going to burst the 40G temp-table space. Reason analysis: Since the sorting can not use so many temporary table space should be other

Hard disk Integer partition calculation method general algorithm: Partition size = (partition size-1) x4+1024x partition size If the formula is calculated according to the hard disk partition integer g: (X-1) *4+1024*x=y where X is the value of the integer partition you want to get, the unit is G,y is the number you should enter when partitioning, the unit is m, For example 40gb= (40-1) X4+1024X40=41116MB According to this calculation method: 5g=5136mb 10g=10276mb 15g=15416mb 20g=20556mb

Tags: OpenStack tutorialThis is the 4th chapter in the OpenStack implementation experience sharing series.One feature of Cloudbase-init is the automatic expansion of Windows's C drive. For example, Windows mirroring is 20G, when deploying instance, the flavor disk definition is 40G, then cloudbase-init automatically expands the C drive to 40G instance deployment.Cloudbase-init Auto-Expander This operation i

The difference between DF and Fdisk has been written before, DF can display disk partitions that are currently mounted, DF-T can display additional file system typesFdisk-l can display all mounted non-mounted partitions, but does not display file typesOn my virtual machine has a piece allocated 40G hard disk but not used, using Fdisk-l for 40G disk is only shown disk/dev/sdb

FTTD (Fiber to the Desk) cabling scheme is attributed to the overall FTTx system, FTTD as a high-level solution for cabling systems, the industry is well aware of the excellent transmission performance of fiber as a transmission medium, but also due to the high price of optical fiber active equipment, Led to few projects in the past few years large-scale use of FTTD wiring. In the rapid development of FTTX access network today, especially the development of FTTH networks, due to the overall indu

Fault description of the sudden loss of application software in linux: a small system found that the application software was deleted in the morning and the system could not run normally. the related personnel found that the OS version was RHEL61, after logging on to the host, we found that devsdb1 mounted two file systems at the same time. Note that tmp was also mounted. [fault description of the sudden loss of application software in linux: a small system found that the application software wa

type; Fdisk-l Fdisk/dev/sda, enter "n" to create a partition, "p" to view the partition, "t" to change the partition type, and "w" to save the modification. 2) create a physical volume: The volume can be created only on the new LVM partition. Pvdisplay/dev/sda2 Pvcreate/dev/sda2 3) create a volume group using a physical volume: The volume group can contain multiple physical volumes or use only one physical volume. Vgcreate myVG/dev/sda2 4) create a logical volume in the volume group Lvcreate-L

Operating software environment: CentOS4.4, TSM5.3.2, ORACLE10G Environment: A broken PC, P3900Mhz, M memory, 40g hard drive, and a obsolete HPD Operating software environment: CentOS 4.4, TSM5.3.2, ORACLE 10G Environment: A broken PC, P3 900 Mhz, M memory, 40G hard drive, a obsolete HP D Operating software environment: CentOS 4.4, TSM5.3.2, Oracle 10G Environment: One broken PC, P3 900 Mhz, M memory, 4

requirements, and the data center is de-stacked. Third, the basic network changes from L2 forwarding to L3 forwarding. In L2 Networks, broadcast storms or loops often occur. Using a layer-3 approach can not only reduce loops, but also improve network bandwidth utilization. Although the three-tier network configuration is complex, it can be deployed automatically through the Controller. As long as the port of the network device is connected through a cable, all network configurations are automat

Flags: [U] User SID: S-1-5-21-1442997883-3833565404-3457035396-1002 Primary Group SID: S-1-5-21-1442997883-3833565404-3457035396-513 Iii. Test (the Server IP address is 192.168.1.24) 1. linux OS testing [Root @ localhost ~] # Smbclient-L // 192.168.1.24-U smb2 Enter smb2's password: Domain = [MYGROUP] OS = [Unix] Server = [Samba 3.6.9-164. el6] Sharename Type Comment -------------------- Wxwsmb Disk user public directory IPC $ IPC Service (MY Samba Server Version 3.6.9-164. el6) Smb2 Disk home

partition: StartFor: Select "EXT4 log File System"mount point:/boot.8. Set the partition, the next step is very key!!!Install the device that starts the boot area drop-down option box select the area that you must select to be divided into/bootFinal language selection: Shanghai, keyboard layout: English, American9. After the removal of the USB flash drive reboot, you will find the direct access to your Windows system, because we have its boot into the/boot partition. Use EASYBCD to create a boo

---------------------------------------------------------------------------- DB_NAME STATUS -------------------- SOFTWARE_VERSION ------------------------------------------------------------ COMPATIBLE_VERSION ------------------------------------------------------------ 2 + ASM2 Asmvol CONNECTED 11.2.0.1.0 11.2.0.1.0 The group_number value of the disk group webdg is 2. This instance + ASM2 has an asmvol connection. This is a new feature in the 11g architecture. It is a logical volume created on

transformation, a special cache with parallel lookup capability can be added in the address transformation mechanism, also known as the Fast Table (TLB), which is used to store the page table entries currently accessed. The address transformation mechanism with a fast table is shown in four. Because of the cost of the relationship, the fast table can not be done very large, usually only 16~512 page table items.The above address transformation mechanism is very good for small and medium programs

rpc框架交互的接口。牵扯到两个相关于性能的细节：内存复用，与对象 复用。 信道利用： 对于一个基于tcp的框架，主要牵扯两个问题，一个是长短连接，连接复用策略，与连接管理。 了解了以上概念，剩下问题，就是如何根据用户的调用方式，编解码库实现方式，和信道利用上，最大限度提高效率。Early RPC Framework 早期的消息系统，使用的策略是： 同步调用+短连接+动态创建所有buffer+动态创建所有对象 这种方式，在初期很快的完成了原型，并且在项目初期，通信比较少情况下，稳定跑了近半年时间。 通信时序图如下： 随着业务放量，推送使用频率的增长，业务逻辑的复杂。瓶颈出现，100w连，稳定服务后，virt 50G，res 40G，左右。gc时间一 度达到3~6s，整个系统负载也比较高。(12年，1.0.3版本) 其实早期在实现的时候，选择动态创建buffer和object，也不奇怪，主要是考虑到go在run

Data center 100g/200g/400g and longer-term fiber technology evolutionApril 22, 2016 the German Rosenberg company was invited to participate in the data center work held in the Hundred lecture lectures. This issue CDCC lecture by Rosenberg data communication product line product Technical Director Mr. Sun Huiyong, he as the National Beacon Committee of Information Technology Equipment Interconnection Subcommittee expert members and China Construction Standardization Association Information and Co