Certificate requirements:
1. The format of the digital certificate follows the X.509 standard
2. Version V3
3. Signature Algorithm SHA256ECDSA
CA used in FABRIC-JAVA-SDK:
./e2e-2orgs/channel/crypto-config/peerorganizations/org1.example.com/users/admin@org1.example.com/msp/signcerts
./e2e-2orgs/channel/crypto-config/peerorganizations/org1.example.com/users/admin@org1.example.com/msp/keystore
This section describes table join, more specifically inner joins internal join.Only two records matching each other are selected for the internal join. Therefore, sometimes the records we need are not included.To better understand this concept, we will introduce two tables for demonstration. Party and MSP in the Scottish Parliament ).
Party (Code, name, leader)Code: political partyCodeName: name of a political partyLEADER: political party leader
This section describes table join, more specifically inner joins internal join.Only two records matching each other are selected for the internal join. Therefore, sometimes the records we need are not included.To better understand this concept, we will introduce two tables for demonstration. Party and MSP in the Scottish Parliament ).
Party (Code, name, leader)Code: political partyCodeName: name of a political partyLEADER: political party leader
In-depth introduction to SQL left join, right join, and full join
We introduced table join, more specifically inner joins internal join. Only two records matching each other are selected for the internal join. Therefore, sometimes the records we need are not included.
To better understand this concept, we will introduce two tables for demonstration. Party and MSP in the Scottish Parliament ).
Party (Code, name, leader)Code: political partyCode
In the first contact with the fabric is usually directly follow the Wiki tutorial step-by-step installation of the configuration, execute a series of commands, and eventually run it up, but many people on the running process and its basic knowledge point may not be very familiar. Based on this today I will take the $fabric_root/examples/e2e_cli/classic demo as an example to share some of my understanding, hope can be helpful to the beginner.
Generate certificate
Fabric is an entry-threshold a
the original Command (for example, the alias ls = 'LS-l'), If You Want To explicitly use the original command, you can delete aliases, use absolute paths, or use escape characters to restore commands.
The alias command is a temporary alias definition. to define an alias that takes effect for a long time, write the alias Definition Statement to/etc/profile or ~ /. Bash_profile or ~ /. Bashrc. The first one is valid for all users, and the last two are valid for the corresponding users. After modi
, the entire result set row contains the data value of the base table.Union in SQLNote that the SELECT statement inside the UNION must have the same number of columns. Columns must also have similar data types. In addition, the columns in each SELECT statement must be in the same order.SQL statementInner join:SELECT msp. name, party. nameFROM msp JOIN party ON party = codeOrSELECT
external JOIN tables, including all records in the LEFT table. If a record in the left table does not have a matching record in the right table, all the columns in the right table in the associated result set are null. It is understood that, even if the ON condition is not met, all records in the left table are displayed, and the field in the right table of this type of records in the result set is null.
Right join/right outer join: records in two external JOIN tables, including all records in
Root CA
CAs are generally grouped by organization, that is, ORG1,ORG2,ORG3 have their own CAs.
When the CA is started, two environment variables, fabric_ca_server_ca_certfile and Fabric_ca_server_ca_keyfile, are set.
What happens if you don't set these two up? In fact, if not set, the CA server will generate these two files on its own according to the default CA CONFIG.
This time the CA is called the ROOTCA.
· Fabric_ca_server_ca_certfile is the certificate of the current CA (public key)
· Fabri
First, what is stack alignment?The byte alignment of the stack, which actually refers to the stack top pointer must be an integer multiple of a byte. Therefore, the bottom of the system stack and MSP, the task stack and the PSP, stack alignment and SP alignment of the three concepts do not differentiate. In addition, when the compiler is mentioned below, it is actually a generic term for the compiler assembler connector.Before the stack of 8-byte alig
that match each other in two tables. So, this leads to sometimes the records we need are not included.
For a better understanding of this concept, we introduce two tables for demonstration. The party table and the Parliamentarians (MSP) of the Scottish Parliament.
Party (Code,name,leader)
Code: Party Codes
Name: Party names
Leader: Party leader
MSP (Name,party,constituency)
Name: member name
Party: Membe
1. What is the. MSP file?
A: The. MSP file is a Windows Installer patch file, including the patch upgrade information of the application.
2. Why use the. MSP file?
A: If you want to patch and upgrade a program installed by Windows Installer, you must use the. MSP file.
3. Is MSP
also limited by the current progress of Atom, and Atom is currently the leader in Level 3 rest services.The Meaning of levels (the meaning of the levels)I should emphasize that the Richardson Maturity Model (RMM) is a good way to think about what elements are in rest, but it does not directly define levels in rest. Roy Fielding also clarified this point: Level 3 RMM is a precondition for rest. Like many of
2.1 Compilation Generation Configtxgen
Similar to the previous 1.1, we can generate Configtxgen programs with the Make command:
CD ~/go/src/github.com/hyperledger/fabric make
Configtxgen
The results after the run are:
Build/bin/configtxgen
cgo_cflags= "" Gobin=/home/studyzy/go/src/github.com/hyperledger/fabric/build/bin go Install-tags "NOPKCS11"-ldflags "-X github.com/hyperledger/fabric/common/configtx/tool/configtxgen/metadata. version=1.0.0 "Github.com/hyperledger/fabric/common/configtx
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