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I'm migrating through magento2 db from magento1 using UB Data Migration Pro
Getting this error Mage2SalesOrder:
Customer Prefix is too long (maximum is 32 characters)
For more detail I also attached the code file.
Related
I'm currently reading a text book on xv6, and understand this so far ...
Virtual Address: First 20 bits to index into a PTE. The PTE takes these 20 bits and turns them into a Physical Page Number: PPN. The remaining 12 bits are used for offset, which will be the same in both virtual and physical addresses.
Paging: Paging hardware uses first 10 bits of 20 bits in the virtual address to select a page directory entry (PDE). If a PDE is present, uses next 10 bits of virtual address to select a page table entry (PTE). Something like this ...
00 0000 0011 | 00 0000 0010 | 0000 0000 0101
Page Dir. (3) | Page Table E. (2) | Offset (5)
Question: Is the PPN showed in the diagrams the same all across? I also know the difference between a page directory and page table entry is only by 1 bit, which is set to 0 or 1 depending if you are at page directory or table. Is the PPN common between all 3 then? (Physical Address, Page Table, Page Directory).
Hopefully, this answers your question. If you access a 32-bit address, 12-bits are saved for the offset into the page. They play no part in address translation.
The CR3 register points to a page table directory. Although not specified in your diagram, I believe this points to a physical page frame. That page frame contains an array of directories. The top 10 bits in your address are an index into that directories.
So now you have a structure like the one in your diagram. That structure contains a pointer to a physical page frame (PPN) containing a page table. Again this is physical address that would be padded with zeroes. You use the value in the PPN field to find the page table.
Your page table is an array of structures that look just like the directory. What is misleading in your diagram is that the D bit may or may not be set in a page table while it is always clear in a directory. The next 10 bits in your address are an index into this table. Use those to locate the desired page table entry.
As before you have a PPN. On this second iteration, this is a pointer to a physical address BUT now it is the actual memory page you want to access. Pad the 20 bits of the PPN with zero and add the lower 12 bits of your address and you have the physical address.
I am running a migration script from MYSQL database to PostgreSQL. A new relationship has been recently created on MYSQL which breaks the import to PostgreSQL.
Error: sqlalchemy.exc.IdentifierError: Identifier 'index name' exceeds maximum length of 63 characters
Is there a way to truncate the identifier name or alternatively increase the maximum characters limit label length (table name, column name, index) in PostgreSQL to by-pass this limitation?
I found this excerpt from the postgresql documention:
The system uses no more than NAMEDATALEN-1 bytes of an identifier; longer names can be written in commands, but they will be truncated. By default, NAMEDATALEN is 64 so the maximum identifier length is 63 bytes. If this limit is problematic, it can be raised by changing the NAMEDATALEN constant in src/include/pg_config_manual.h.
Has anyone tried it out? Is there a better solution? I'm using sqlalchemy and python, is there a way of truncating the identifier in Sqlaclchemy?
I have a database in MS Sql server.
I want to migrate the same to Oracle also.
But there are few tables and column names that are 30 character long.
Oracle does not accept any identifier which is more than 30 characters long.
Is there any option in Oracle that allows us to increase the length of the identifier?
Thanks
The maximum identifier length is 30 characters.
This is the latest discussion on stack overflow that shows there is no way to increase the identifier length
Change table/column/index names size in oracle 11g or 12c
Also there is a discussion on oracle forum where users have a suggestion to change the length of identifier.
https://community.oracle.com/ideas/3338
if i have a Virtual Address: 0xF3557100 , how do i convert it to Physical Address and what are the Values of Offset, Page Directory and Page Table ?
The PTE (page table entry) for that address has the value 0x87124053
thnx
Sadly, what you are asking is system dependent. You would need to know the size of the page to begin with.
In the simplest case, the lowest order bits corresponding to the page size are the offset and the remaining high order bits specify the page table entry.
You say that you have the value of he page table entry. You then need to know the structure of the page table entry. Some part of that will indicate the physical address. Other parts will define page attributes.
In short, we'd need to know a whole lot more information.
In general from this info you can not translate a VA to PA.
Each architecture has some constant value for PAGE_SHIFT. as your address is 32 bit, most of such architecture has 12 bit PAGE_SHIFT value.
this value determines the offset value so your offset value is 12 bits.that also means your page size is 4096 bytes. even though a architecture can support more than one value for PAGE_SHIFT, we take case of 12 bits offset which is usually default value in most systems making page of 4096
PTE contains address of the page frame/number along with other status and protection information.Lower 12 bits in PTE are used for status and protection while other 20 bits are used for PPN. as a principle virtual frame number is mapped to physical frame number and offset is same in both. so exclude lower most 12 bits from PTE and append 12 lower most bits from va.
so offset from va is 0x100 so physical address is 0x87124100
according to 10-10-12 rule (there is no general rule for this division)
offset = 12 bits
page table = page directory=10 bits
now you CAN easily calculate relevant bits value from given address.
1111001101 0101010111 000100000000
page directory offset = 1111001101
page table offset = 0101010111
page offset = 000100000000
I have to do a search in ADN file on SIM card in my STK applet to find someone.
However, if I have to scan the whole number of records in ADN file (even it's a blank record), it will be very slow and I don't know how to get the number of contacts in the ADN file from STK applet.
If anyone of you knows how to get the number of contacts, please share with me and thank you very much in advance.
As the phone has the contact memory usage information (i.e. 34/250), I don't know how the phone get this information and is there any solution that allow STK Applet to get this information from the phone?
Phone select the file and in response to it SIM send the response, for which mobile again run a command which is known as Get Response, In this get response SIM send the details of that file. Now in case of ADN which is a record file command will contains file size and record length so Total records will be Size/Record length.
You can read about these command in more details in 3GPP 11.11
Now regarding searching the data in STK applet is not very time consuming, STK applets are very fast and 250 records are not too much, so in a loop just read record and check for 21 bytes if it is FF then record is empty. Structure of ADM records is:-
1 to X Alpha Identifier O X bytes
X+1 Length of BCD number/SSC contents M 1 byte
X+2 TON and NPI M 1 byte
X+3 to X+12 Dialling Number/SSC String M 10 bytes
X+13 Capability/Configuration Identifier M 1 byte
X+14 Extension1 Record Identifier M 1 byte
In your case length is 34 so first 20 bytes contains the name(here we call it Alpha ID) then number starts. Well I am asking to check 21th byte because it could be a case when user saved a number without any name. So don't check first byte.