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#bi技术
软件技术指标
1、性能:软件的可靠性、效率、容量、可移植性等;2、可用性:易用性、可理解性、可控性、可定制性、可保障性等;3、可维护性:可靠性、可读性、可维护性、可扩展性、可支持性等;4、可靠性:系统可靠性、软件可靠性、数据可靠性等;5、可测试性:软件可测试性、系统可测试性、数据可测试性等;6、可视性:软件可视性、系统可视性、数据可...
开发笔记
·
2024-05-03
软件
技术指标
zabbix5.0: 查看日志/var/log/zabbix/zabbix_server.log
zabbix5.0:查看日志/var/log/zabbix/zabbix_server.log[root@zh-cjh~]#find/-namezabbix._server.log^C[root@zh-cjh~]#find/-namezabbix_server.log/var/log/zabbix/zabbix_ser...
开发笔记
·
2024-03-12
zabbix
zabbix5.0
查看
日志
var
hadoop中combiner是什么
Combiner(合并器)在Hadoop中,Combiner(合并器)是一个可选的阶段,用于优化MapReduce任务的性能。它是在Map阶段输出之后、规约(reduction)之前执行的。Combiner的作用是在Map任务的本地节点上对Map阶段的输出进行局部聚合。它接收Map任务输出的键值对,并将具有相同键的键值...
开发笔记
·
2024-01-23
hadoop
combiner
是什么
java技术栈有哪些
一、消息队列一个大型的分布式系统,通常都会异步化,走消息总线。 消息队列作为最主要的基础组件,在整个体系架构中,有着及其重要的作用。kafka是目前最常用的消息队列,尤其是在大数据方面,有着极高的吞吐量。而rocketmq和rabbitmq,都是电信级别的消息队列,在业务上用的比较多。2019年了,不要再盯着...
开发笔记
·
2023-10-23
java
技术
哪些
Reachability(判断网络是否连接)
类似于一个网络状况的探针。 [[NSNotificationCenterdefaultCenter]addObserver:selfselector:@selector(reachabilityChanged:)name:kReachabilityChangedNotificationobject:nil];&nbs...
开发笔记
·
2023-10-12
Reachability
判断
网络
是否
连接
ORA-55339: a virtual model already exists for the specified model-rulebase combination
文档解释ORA-55339:avirtualmodelalreadyexistsforthespecifiedmodel-rulebasecombinationCause:Avirtualmodelwithidenticalcomponentswasalreadypresent.Action:Chooseadiffer...
IT技术学习
·
2023-07-28
ORA-55339
virtual
model
already
exists
ORA-24940: invalid combination of string namespace, string presentation and string receive protocol
文档解释ORA-24940:invalidcombinationofstringnamespace,stringpresentationandstringreceiveprotocolCause:Aninvalidcombinationofnamespace,presentationandreceiveprotocol...
IT技术学习
·
2023-07-28
string
ORA-24940
invalid
combination
of
ORA-19955: only one open thread is allowed to change the DBID
文档解释ORA-19955:onlyoneopenthreadisallowedtochangetheDBIDCause:Theoperationfailedbecausetherewereactivethreadsinthedatabase.Themostlikelycauseisthatthedatabasecra...
IT技术学习
·
2023-07-28
ORA-19955
only
one
open
thread
ORA-39172: Cannot remap transportable tablespace names with compatibility of string.
文档解释ORA-39172:Cannotremaptransportabletablespacenameswithcompatibilityofstring.Cause:Theuserattemptedtoremapatablespacenameinatransportabletablespacejobwhenthec...
IT技术学习
·
2023-07-28
ORA-39172
Cannot
remap
transportable
tablespace
ORA-25110: NOSORT may not be used with a bitmap index
文档解释ORA-25110:NOSORTmaynotbeusedwithabitmapindexCause:AnattemptwasmadetocreateabitmapindexusingtheNOSORToption.Action:RemoveNOSORTfromtheCREATEBITMAPINDEXstatem...
IT技术学习
·
2023-07-28
ORA-25110
NOSORT
may
not
be
ORA-14701: partition-extended name or bind variable must be used for DMLs on tables partitioned by the System method
文档解释ORA-14701:partition-extendednameorbindvariablemustbeusedforDMLsontablespartitionedbytheSystemmethodCause:Userattemptednottousepartition-extendedsyntaxforata...
IT技术学习
·
2023-07-28
ORA-14701
partition-extended
name
or
bind
ORA-56708: Could not find any datafiles with asynchronous i/o capability
文档解释ORA-56708:Couldnotfindanydatafileswithasynchronousi/ocapabilityCause:TherearenodatafileswhichareasynchronousI/Ocapable.Action:Makesureasynchronousi/oispermi...
IT技术学习
·
2023-07-26
ORA-56708
Could
not
find
any
ORA-09708: soacon: failed to bind socket to port.
文档解释ORA-09708:soacon:failedtobindsockettoport.Cause:Thebindsystemcallfailedonthesocket.Action:CheckadditionalinformationforOSerror.Tryconnectingagain.ORA-09708:...
IT技术学习
·
2023-07-26
to
ORA-09708
soacon
failed
bind
ORA-24369: required callbacks not registered for one or more bind handles
文档解释ORA-24369:requiredcallbacksnotregisteredforoneormorebindhandlesCause:NocallbackshavebeenregisteredforoneormoreofthebindhandleswhicharepartoftheRETURNINGclau...
IT技术学习
·
2023-07-26
ORA-24369
required
callbacks
not
registered
ORA-09802: Conversion of binary label to string failed.
文档解释ORA-09802:Conversionofbinarylabeltostringfailed.Cause:ORACLEwasunabletoconvertabinarylabeltoastring.Action:ChecktheUNIXerrornumberforapossibleoperatingsyste...
IT技术学习
·
2023-07-26
ORA-09802
Conversion
of
binary
label
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