. Circular variables can be referenced in the loop body using A4 and #a4 to refer to the loop count. B4: Takes the field value of status in the current group and complements at least 5 records. B5: Append new record to A3. After the end of the cycle A3 as follows: A6: Returns the result to the report. The collector provides the JDBC interface externally, and the report tool recognizes the collector as a normal database. then use Birt to design the list table with the following template:If the Qu
jieba.Transaction A reads and operates on the data that transaction B has not committed. If transaction B is rolled back, the data read by transaction A is not recognized at all. Let's look at the dirty read scenarios caused by concurrent withdrawals and transfers:
Time
Transfer transaction
Withdrawal transaction B
T1
Start transaction
T2
Start transaction
T3
The account balance is USD 1000.
T4
Retrieve 500 yuan and
structure of the list in the report.
A4: cycle the group in A2 and insert a record into A3 each time. Cycle variables can be referenced in A4 in the loop body, and # A4 is used to reference the cyclic count.
B4: obtains the status field value in the current group and supplements at least five records.
B5: append a new record to A3. After the loop ends, A3 is as follows:
A6: return the result to the report. The assembler provides a JDBC interface. The report tool recognizes the assembler as a c
Transaction A
Withdrawal Service B
T1
Start a transaction
T2
Start a transaction
T3
Inquiry account balance is 1000 yuan
T4
Remove 500 yuan balance modified to 500 yuan
T5
Inquiry account balance is 500 yuan (dirty Read)
T6
Undo transaction balance restored to 1000 yuan
T7
Import 100 yuan to change the bala
Can ' t create ASM instance on Node2 during running root.sh on Node2 due to time syc problem Description:
Run/u01/app/12.1.0.2/grid/root.sh on Node2 after it succesully on Node1.
Died at/u01/app/12.1.0.2/grid/crs/install/crsinstall.pm line 914.
The command '/u01/app/12.1.0.2/grid/perl/bin/perl-i/u01/app/12.1.0.2/grid/perl/lib-i/u01/app/12.1.0.2/grid/crs/ install/u01/app/12.1.0.2/grid/crs/install/rootcrs.pl ' execution failed
DIAGNOSTIC Analysis:
Log1:/u01/app/crsusr/diag/crs/itqe-
determines whether the task queue is full. is not full, the newly submitted task is stored in the work queue. Full, then go to the next process.
3. The last thread pool determines whether the entire thread pool is full. is not full, a new worker thread is created to perform the task, and the saturation policy is assigned to handle the task.
Processing flow
To illustrate:
Assuming that Coresize is set to 4,maximumpoolsize set to 6, the Task force is listed as bounded queue workequeque its size
Select *from t1left join T2 on T2.sysno =t1. Asysnoleft join T3 on T3.sysno =t2. Asysnoleft join T4 on T4.sysno =t3. Asysnoleft join T5 on T5.sysno =t4. Asysnoleft join T6 on T6.sysno =t5. Asysnoleft join T7 on T7.sysno =t6. Asysnowhere t1.name like '%aaa% 'In the absence of any indexes, fuzzy queries, such SQL performance is the worst, such SQL for the Federa
//172.16.86.210/node1 -U smbuserEnter SAMBA\smbuser‘s password:Try "help" to get a list of possible commands.smb: \> put ks3.cfgputting file ks3.cfg as \ks3.cfg (480.9 kb/s) (average 481.0 kb/s)Shared directory Additional Usage scenarios#共享目录本是为每个用户提供一个公共文件目录。以下是个人对共享目录的另外一种使用场景#每个用户不创建家目录,只能在公共目录中访问,#在共享目录下 创建每个用户的家目录,属主用户,数组smbroot,权限770,公共目录pub #这么设计的好处是smbroot 能管理所有账号,文件存放位置比较统一,容易管理[[emailprotected] ~]# useradd -M smbuser2[[emailprotected] ~]# smbpasswd -a smbuser2[[emailprotected] node1]
hardware divide and saturated math instructions.
The Cortex-M4 adds DSP instructions and an optional single-precisionfloating-point unit.
If the Cortex-M4 has the floating point unit, then it is known as the Cortex-M4F.
Arm cortex-M instructions
Instructions
InstructionSize
CortexM0
CortexM0 +
CortexM1
CortexM3
CortexM4
CortexM4f
ADC, add, ADR, And, ASR, B, Bic, bkpt, blx, BX, CEN, CMP, CPS, EOR, LDM, LDR, ldrb, ldrh, ldrsb, ldrsh, LSL, LSR, mov, Mu
Http://source.android.com/projects/bluetooth-featuresBluetooth features by release
Android 2.0
2.1 release (eclair)
Java API features
Bluetooth on/off
Device discovery
RFCOMM server and client sockets
Automatic RFCOMM channel lookup and SDP record advertisement via SDPUUID
Supports most RFCOMM use-cases, including peer-to-peer communicationAnd Gaming
See http://developer.android.com/reference/android/bluetooth/package-summary.html For the latest javadoc.
Platform features
Based on blue
Industrial board computer built with Raspberry Pi computing moduleGuideOn the Kickstarter crowdfunding website, a project named "MyPi" uses the Raspberry Pi computing module to create an SBC (Single Board ComputerSingle Board Computer), Provides a mini-PCIe slot, serial port, wide range of input power, and module expansion and other functions.
You may be wondering why someone has released such a sandwich that looks a bit like a sandwich, built on the
-hole technology, plating through hole technology)
Re (read enable, readable)
QP (quad-pumped, quadruple pump)
RBB (Rapid BIOS boot, quick BIOS boot)
RNG (random number generator, random number generator)
RTC (real time clock, real-time clock)
KBC (keybroad control, keyboard controller)
SAP (sideband address port)
SBA (side band addressing, side band addressing)
SBC (Single Board Computer)
SBP-2 (Serial Bus Protocol 2, the second generation Serial Bus
use the Triangle Area Formula to get the polygon area formula:For Figure 1, the polygon area is:S (1-> 6) = S (1, 2, 3) + S (1, 3, 4) + S (1, 5) + S (1, 5, 6)Here we have some questions. First, figure 1 shows a convex polygon. Does this algorithm also apply to non-Convex Polygon? For example, the following figure shows the simplest Convex Polygon:
Figure 2
Using the division method just now, there will be a strange problem, that is, a triangle appears outside the graph, the other is out of the
The current communication methods are inseparable from the IP network. To combine the two, you must use the gateway. Now let's talk about the knowledge of Cisco's unified voice gateway. Which models are available in these products, and what are the differences between these models?
Cisco Unified Communication Voice Gateway
Cisco 1700, 2600XM, 2800, 3700 and 3800, and Cisco Catalyst? The 5000 Series Voice Gateway Router uses SIP to terminate a call and convert the call signal between the PSTN and
Full-width characters converted to half-width characters
function REPLACE_DBC2SBC ($STR) {
$DBC = Array (
' 0 ', ' 1 ', ' 2 ', ' 3 ', ' 4 ',
' 5 ', ' 6 ', ' 7 ', ' 8 ', ' 9 ',
' A ', ' B ', ' C ', ' d ', ' e ',
' F ', ' g ', ' h ', ' I ', ' J ',
' K ', ' l ', ' m ', ' n ', ' O ',
' P ', ' Q ', ' R ', ' s ', ' t ',
' U ', ' V ', ' w ', ' x ', ' Y ',
' Z ', ' a ', ' B ', ' C ', ' d ',
' E ', ' f ', ' g ', ' h ', ' I ',
' J ', ' K ', ' l ', ' m ', ' n ',
' O ', ' P ', ' Q ', ' R ', ' s ',
' t ', '
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