072542a5cc
This commit adds a page listing the ScyllDB limits we know today. The page can and should be extended when other limits are confirmed. Closes scylladb/scylladb#19399
75 lines
1.7 KiB
ReStructuredText
75 lines
1.7 KiB
ReStructuredText
==============
|
|
Limits
|
|
==============
|
|
|
|
This document provides hard and soft limits in ScyllaDB.
|
|
|
|
Cluster and Node Limits
|
|
-----------------------------
|
|
|
|
.. list-table::
|
|
:widths: 50 50
|
|
:header-rows: 1
|
|
|
|
* - Component
|
|
- Limit
|
|
* - Nodes per cluster
|
|
- Low hundreds
|
|
* - Node size
|
|
- 256 vcpu
|
|
|
|
See :ref:`Hardware Requirements <system-requirements-hardware>` for storage
|
|
and memory requirements and limits.
|
|
|
|
CQL Limits
|
|
--------------
|
|
|
|
.. list-table::
|
|
:widths: 50 50
|
|
:header-rows: 1
|
|
|
|
* - Component
|
|
- Limit
|
|
* - Keyspaces per cluster
|
|
- Thousands (tested with 1000)
|
|
* - Tables per keyspace
|
|
- Low thousands (tested with 5000)
|
|
* - Tables per cluster (including indexes)
|
|
- Thousands
|
|
* - Tables with CDC enabled
|
|
- No limit. CDC can be enabled for all tables in a cluster.
|
|
* - Materialized views and secondary indexes per table
|
|
- Low tens
|
|
* - Columns per table
|
|
- Hundreds
|
|
* - Columns per cluster
|
|
- Tens of thousands
|
|
* - Partition size
|
|
- Gigabytes
|
|
* - Rows per partition
|
|
- No limit
|
|
* - Row size
|
|
- Latency-related soft limit:
|
|
|
|
Hundreds of kilobytes (good latency) or megabytes (mediocre latency)
|
|
* - Key length
|
|
- 65533
|
|
* - Table / CF name length
|
|
- 48 characters
|
|
* - Keyspace name length
|
|
- 48 characters
|
|
* - Query parameters in a query
|
|
- 65535 (2^16-1)
|
|
* - Statements in a batch
|
|
- 65535 (2^16-1)
|
|
* - Fields in a tuple
|
|
- 32768 (2^15) (just a few fields, such as 2-10, are recommended)
|
|
* - Collection (List)
|
|
- ~2 billion (2^31)
|
|
* - Collection (Set)
|
|
- ~2 billion (2^31)
|
|
* - Collection (Map)
|
|
- Number of keys: 65535 (2^16-1)
|
|
* - Blob size
|
|
- 2 GB ( less than 1 MB is recommended)
|
|
|