bbu extras

up, reorganize the server.Vi. CPU and memoryNote the following issues:Do you have any spare memory? is the server swap between memory and hard disk?Are there any remaining CPUs? How many cores does the server have? Are there some CPU cores that are overloaded?Where does the server's maximum load come from? What is the average load?Vii. HardwareThere are many servers or bare-metal states that you can look at:Find the RAID card (with a BBU backup batte

any spare memory? Is swap used?② Are there any remaining CPUs? How many cores? Are there too many core loads?③ Where does the maximum server load come from? What is the average load?Worker hardware● Lspci● Ethtool● DmidlecodeCheck whether many servers are in bare metal status:① Find the raid Card (with bbu backup battery ?) , CPU, spare memory slots② Is the NIC set? Is it in half duplex status? Is the speed 10 Mbps? Is there a Tx/RX error?⑻ Io Perfor

an elite who pays for bbu, but some of his friends who pay for it. When all your readers and friends are here, you cannot leave this nest. If you want to contact them, you must pay for them. Blog is a billing method that I like very much. I think network fees in China are an expected model. The earliest people who visit the Internet called the Internet Worms. For example, if Sina launched a service today, I will call one of them. I want not only VIP

, the system will automatically increase the frequency, but it is usually not so timely. As a result, the CPU performance is insufficient, cannot withstand sudden requests; When a RAID card is used, BBU is usually provided (the standby battery of the cache Module). In the early stage, lithium battery technology was generally used, and regular charge and discharge are required (the DELL server is used for 90 days, and IBM is used for 30 days ), we can

high-performance XtraDB engine, a PXC high-availability solution, and a DBA management toolkit such as percona-toolkit, 3. MariaDB Developed by the founder of MySQL, MariaDB aims to be fully compatible with MySQL, including APIs and command lines, so that MariaDB can easily become a substitute for MySQL. MariaDB provides a standard storage engine provided by MySQL, namely, MyISAM and InnoDB. XtraDB (named Aria) is used in 10.0.9 to replace InnoDB of MySQL. 4. How to choose Based on years of e

) Select Maximum Performance (optimal Performance)2. In the memory settings menu, Start Node Interleaving to avoid NUMA problems. Disk array card 1. the array card must have a CACHE and BBU Module2. Set the write policy to write back (two write policies are available for Cache: write-through and write-back), and disable the array pre-read policy. Ii. Operating System Layer 1File System Problems Optimization level O

Channel: if a new port is added and the port on the new device is added, a new Wavelength Division Channel is required. 4) confirmation of the wavelength division system: if a new Wavelength Division Channel is required, check whether factors such as the TOM board port of the wavelength division device are met. 5) Confirmation of engineering materials: FC/FC jumpers with a length of 3 m, 10 m and 15 m, and light attenuation of 3dBm and 5dBm should be used during the engineering process. 6) trou

Traditional wireless network sites need to be relocated, and services on the current network need to be interrupted. In addition, they can only be serially cutover one by one. The organizational work is complicated and the resource investment is huge, therefore, it is imperative to discuss a low-risk and fast network construction relocation and cutover solution. The zte bbu + RRU Base Station of ZTE Corporation Limited uses a distributed structure and

? This is relatively easy. there are major routes to Rome, such: ● pstree-a or, ● ps aux, and listen to the network service, not much to talk about, bright three kill guys ● netstat-lntp ● netstat-lnup ● netstat-lnxp: What is the meaning of netstat? I don't know what the room means. why is the CPU and memory here? I feel like I have a bit of experience solving the equation. I have used several commands/tools to answer a few questions. this seems to have returned to the distant junior high school

example, to solve the coverage problem in a region with a small amount of business, you can use a base station or a direct station. the power consumption of the direct station equipment is low, and the power supply, air conditioning, and other ancillary equipment are not required, obviously, the application of direct release stations is more energy-saving and consumption-reducing. Create a green Wireless Network 2 Applications of new technologies and energy-saving devices and solutions. During

to ensure network coverage. It establishes a Host link to provide signaling and data transmission, and provides ubiquitous connections to ensure reliable basic user experience; boosting Layer is mainly used to increase network capacity. It establishes a Boosting link to provide users with data transmission for the best user experience. The MSA is a key technology for organically aggregating Host Layer and Boosting Layer. It provides multi-stream aggregation through multiple nodes, further enhan

In the cellular mobile communication system, the antenna is the converter of the circuit signal and the space radiation electromagnetic wave, and is the key component of the mobile communication system.From 2G to 4G, the mobile base station antenna has undergone omnidirectional antenna, directional single-polarized antenna, directional dual-polarized antenna, electrically modulated single-polarized antenna, electrically modulated dual-polarized antenna, dual-frequency electrically modulated dual

overloaded? Where does the server's maximum load come from? What is the average load? Vii. Hardware 123 $ lspci$ dmidecode$ ethtool There are many servers or bare-metal states that you can look at: Find the RAID card (with a BBU backup battery), CPU, spare memory slot. Based on these conditions, you can get an overview of the source of hardware problems and how to improve performance. Is the NIC s

concurrency while really database had to wait a longer for requests submitted. second, iostat mixes together reads and writes in single statistics which specifically for databases and should on RAID with BBU might be like mixing apples and oranges together-writes shocould go to writeback cache and be both essential while reads only complete when actual data can be delivered. the toolpt-diskstatsfromPercona Tookitbreaks them apart and so can be much m

independent slave server; The server's own energy-saving strategy will reduce the CPU frequency when the load is low. when the load is found to be higher, the system will automatically increase the frequency, but it is usually not so timely. as a result, the CPU performance is insufficient, cannot withstand sudden requests; When a RAID card is used, BBU is usually provided (the standby battery of the cache module). in the early stage, lithium battery

in the memory settings menu to avoid NUMA problems 2. disk I/O problems SSD hard drive For disk array storage, it is recommended that CACHE and BBU modules be configured for the array card to significantly improve IOPS. Select raid 10 instead of raid 5. 3. file system layer optimization Use the deadline/noop I/O schedulers. do not use cfq. When using xfs file systems, do not use ext3; ext4 is barely available, but xfs must be used if the business vol

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computers. Hardware disk array (Hardware RAID) The processor is built into the raid card and does not require CPU operation on the server. The advantage is the fastest read and write performance, does not occupy server resources, can be used for any operating system, but also after the system power off, through the backup battery module (BBU, Backup Battery Unit) and nonvolatile memory (NVRAM) Read and writ

the same as in the list of PS aux processes.If there are several Java or Erlang processes running at the same time on the server, it is important to be able to find each process by the PID separately.Usually we recommend that you run fewer services on each server, and you can increase the server if necessary. If you see a server with thirty or forty listening ports open, then make a record, go back to the time to clean up, reorganize the server.Vi. CPU and memory$ free-m$ uptime$ top$ htopNote

0.00 0.00 0.00 0.00 0.00You can see that SDB and dm-16 use 100% of%util, and the following need to find out which logical volume uses 100% IO:# Dmsetup LSThe output is as follows:....... DOMOVG-SERVERNAME--DB_HDC (253, 16) .........Once the corresponding logical volume is found, log on to the corresponding machine and use Dstat or Iostat to find out which process uses a lot of IO:# Dstat--top-bio-advIf the problem with the data is caused, it is usually caused by the following actions:1 SCP,TAR,