Restricted items

Last Updated: Aug 03, 2017

Restricted item Restriction Description
The number of instances saved under an Alibaba Cloud user account Up to 10 If you need to raise the limit, please open a ticket.
The number of tables in an instance Up to 64 If you need to raise the limit, please open a ticket.
Instance name length 3-16 Bytes Character set: [a-z, A-Z, 0-9] and hyphens(-). The first character must be a letter and the last character cannot be a hyphen(-).
Table name length 1-255 Bytes Character set: [a-z, A-Z, 0-9] and underscore (_). The first character must be a letter or underscore(_).
Column name length 1-255 Bytes Character set: [a-z, A-Z, 0-9] and underscore (_). The first character must be a letter or underscore(_).
Number of columns in a Primary Key 1-4 At least 1 and no more than 4.
Size of String type Primary Key column values Up to 1 KB A single Primary Key column’s String type column value is limited to 1 KB.
Size of String type attribute key column values Up to 2 MB A single attribute column’s String type column value is limited to 2 MB.
Size of Binary type Primary Key column values Up to 1 KB A single Primary Key column’s Binary type column value is limited to 1 KB.
Size of Binary type attribute key column values Up to 2 MB A single attribute column’s Binary type column value is limited to 2 MB.
Number of attribute columns in a single row Unlimited A single row can contain the infinite attribute columns.
Data size of a single row Unlimited The total size of all column names and column value data for a single row is unlimited.
Reserved read/write throughput for a single table 0-5000 If you need to raise the limit, please open a ticket.
Number of columns in a read request’s columns_to_get parameter 0-128 The maximum number of columns obtained in a row of data in the read request.
Table-level operation QPS 10 The QPS of a table-level operation on an instance should not exceed 10. For table-level operations, see Table operations.
Number of UpdateTable operations for a single table Raise: Unlimited; Lower: Unlimited A calendar day is from 00:00:00 to 00:00:00 of the next day in UTC time, or 08:00:00 to 08:00:00 of the next day in Beijing time.
UpdateTable frequency for a single table Once every 2 minutes The reserved read/write throughput for a single table can be adjusted no more than once every 2 minutes.
The number of rows read by one BatchGetRow request Up to 100 N/A
The number of rows written by one BatchWriteRow request Up to 200 N/A
Data size of one BatchWriteRow request Up to 4 MB N/A
Data returned by one GetRange operation 5000 rows or 4 MB The data returned by a single operation cannot exceed 5000 rows or 4 MB. If there is more data, the excessive data will be truncated.
The data size of an HTTP Request Body Up to 5 MB N/A
Thank you! We've received your feedback.