Original http://www.mysqlsupport.cn/megacli-study/
Author: Wu Bingxi Source: http://www.mysqlsupport.cn/contact information: wubingxi # gmail.com reprint please indicate/translator and source, and cannot be used for commercial purposes, offenders must investigate.
Megacli common parametersMegacli-adpcount [display the number of adapters]Megacli-adpgettime-aall [display adapter time]Megacli-adpallinfo-aall [show all adapters]Megacli-ldinfo-Lall-aall [display information of all Logical Disk grou
[display the number of adapters]MegaCli-AdpGetTime-aALL [display adapter time]MegaCli-AdpAllInfo-aAll [show all adapters]MegaCli-LDInfo-LALL-aAll [display information of all Logical Disk groups]MegaCli-PDList-aAll [display all physical information]MegaCli-AdpBbuCmd-GetBbuStatus-aALL | grep 'charger status' [view charging Status]MegaCli-AdpBbuCmd-GetBbuStatus-aALL [display BBU status information]MegaCli-AdpBbuCmd-GetBbuCapacityInfo-aALL [display
ensure service quality, each base station must be equipped with sufficient Baseband Processing Units (BBU ), to meet the communication quality during business peaks. However, the distribution of wireless services in time and space also changes dynamically. Taking Beijing as an example, during work days, traffic is mainly concentrated in urban areas, such as international trade and Zhongguancun; night visits are mainly concentrated in residential conc
Create a student tablemysql> desc student; +-------+-------------+------+-----+---------+----------------+| Field | Type | Null | Key | Default | Extra ID | tinyint (4) | NO | PRI | NULL | auto_increment | | name | varchar | NO | | NULL | | | age | tinyint (4) | NO | | NULL | | +-------+-------------+------+-----+---------+----------------+3 in Set (0.01 sec )Add Table Records1. Add a record insertSyntax: Insert [into]
frequency and must be tuned to max performance.There is also a CAE processor at the BIOS level, and when it is idle, we can disable the processor so that it is in the lowest state.about TPS High, high businessWith regard to the high TPS and high business conditions, it is important to configure the array cards, so be sure to configure the cache module and the Bbu module. The BBU module is used to provide m
/requests/packages/urllib3/connection.py:303: Subjectaltnamewarning:certificate for pypi.python.org have no ' subjectaltname ', falling back to check for a ' commonname ' F or now. This feature was being removed by major browsers and deprecated by RFC 2818. (see https://github.com/shazow/urllib3/issues/497 for details.) Subjectaltnamewarning Downloading SETUPTOOLS-30.0.0-PY2.PY3-NONE-ANY.WHL (472kB) 100% |████████████████████████████████| 481kB 434kb/s Requirement already satisfied:six>=1.4.1 In
New version of megacli-1.01.24-0.i386.rpm (: Http://www.lsi.com/downloads/Public/MegaRAID Common Files/8.02.16_megacli.zip The package will install the program under/OPT, of course, you can also customize the installation directory, for example: RPM--relocate/opt/=/usr/sbin/-I megacli-1.01.24-0.i386.rpm (that is, the installation directory/opt replaced/usr/ Sbin). (There is a megacli file in the Linux folder with I386 RPM) related commands and their resolution: view machine model # Dmidecode |
data:wd WD300 1BKHG D1s6wx11e83nu081FDE capable:not capablefde Enable:DisableSecured:UnsecuredLocked:UnlockedNeeds EKM attention:noforeign state:none Device speed:6.0gb/slink speed:6.0gb/smedia type:hard Disk devicedrive temperature:28c (82.40 F) PI Eligibility:nodri ve is formatted for PI information:NoPI:No PIPort-0:P ort status:activeport ' s linkspeed:6.0gb/sport-1:P ort status:a Ctiveport ' s linkspeed:unknowndrive has flagged a s.m.a.r.t alert:noexit code:0x00As can be seen from the above
also a parameter that is memory frequency and must be tuned to max performance. There is also a CAE processor at the BIOS level, and when it is idle, we can disable the processor so that it is in the lowest state. about TPS High, high business With regard to the high TPS and high business conditions, it is important to configure the array cards, so be sure to configure the cache module and the Bbu module. The BB
background.4. Storage-level disaster preparedness (same-city disaster preparedness)1. The synchronous process of disaster preparedness: Commit1, Redo, Binlog write to the local storage cache;2, through the network synchronization Binlog write to the remote synchronization server storage cache;3, response to local database;4, the transaction submitted successfully;2. Risk:Network problems (intermittent signal, cable broken), resulting in write hang, commit timeout failed.3, Solve:Through the tim
cache-a supercapacitor/ultracapacitor, low-power capacitor array, secondary battery, or other write-cache protect Ion. Always does repeated plug-pull testing when using SSDs, don ' t just trust the specifications.Avoid RAID 5, mostly because the performance is terrible, but also because I ' ve seen corruption issues with rebuilds from Parity on failing disks. If you ' re using spinning disks RAID, a better option for a database.If you had a hardware RAID controller with a battery backed cache (
seen in general. LSPCI can see the model number of the RAID card.==========================================================RPM-IVH megacli-1.01.09-0.i386.rpmcommand to use:Megacli-ldinfo-lall-aall RAID Level CheckMegacli-adpallinfo-aall Check RAID card informationMegacli-pdlist-aall Viewing hard disk informationMegacli-adpbbucmd-aall View battery InformationMegacli-fwtermlog-dsply-aall View RAID Card logsMEGACLI Common Parameters IntroductionMegacli-adpcount "Display adapter Count"Megacli-adpge
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