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Add support for list type to store elements larger than 4GB (#9357 )

Redis lists are stored in quicklist, which is currently a linked list of ziplists.
Ziplists are limited to storing elements no larger than 4GB, so when bigger
items are added they're getting truncated.
This PR changes quicklists so that they're capable of storing large items
in quicklist nodes that are plain string buffers rather than ziplist.

As part of the PR there were few other changes in redis: 
1. new DEBUG sub-commands: 
   - QUICKLIST-PACKED-THRESHOLD - set the threshold of for the node type to
     be plan or ziplist. default (1GB)
   - QUICKLIST <key> - Shows low level info about the quicklist encoding of <key>
2. rdb format change:
   - A new type was added - RDB_TYPE_LIST_QUICKLIST_2 . 
   - container type (packed / plain) was added to the beginning of the rdb object
     (before the actual node list).
3. testing:
   - Tests that requires over 100MB will be by default skipped. a new flag was
     added to 'runtest' to run the large memory tests (not used by default)

Co-authored-by: sundb <sundbcn@gmail.com>
Co-authored-by: Oran Agra <oran@redislabs.com>

2021-11-03 20:47:18 +02:00

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Redis Test Suite

The normal execution mode of the test suite involves starting and manipulating local redis-server instances, inspecting process state, log files, etc.

The test suite also supports execution against an external server, which is enabled using the --host and --port parameters. When executing against an external server, tests tagged external:skip are skipped.

There are additional runtime options that can further adjust the test suite to match different external server configurations:

Option	Impact
`--singledb`	Only use database 0, don't assume others are supported.
`--ignore-encoding`	Skip all checks for specific encoding.
`--ignore-digest`	Skip key value digest validations.
`--cluster-mode`	Run in strict Redis Cluster compatibility mode.
`--large-memory`	Enables tests that consume more than 100mb

Tags

Tags are applied to tests to classify them according to the subsystem they test, but also to indicate compatibility with different run modes and required capabilities.

Tags can be applied in different context levels:

start_server context
tags context that bundles several tests together
A single test context.

The following compatibility and capability tags are currently used:

Tag	Indicates
`external:skip`	Not compatible with external servers.
`cluster:skip`	Not compatible with `--cluster-mode`.
`large-memory`	Test that requires more than 100mb
`tls:skip`	Not campatible with `--tls`.
`needs:repl`	Uses replication and needs to be able to `SYNC` from server.
`needs:debug`	Uses the `DEBUG` command or other debugging focused commands (like `OBJECT`).
`needs:pfdebug`	Uses the `PFDEBUG` command.
`needs:config-maxmemory`	Uses `CONFIG SET` to manipulate memory limit, eviction policies, etc.
`needs:config-resetstat`	Uses `CONFIG RESETSTAT` to reset statistics.
`needs:reset`	Uses `RESET` to reset client connections.
`needs:save`	Uses `SAVE` to create an RDB file.

When using an external server (--host and --port), filtering using the external:skip tags is done automatically.

When using --cluster-mode, filtering using the cluster:skip tag is done automatically.

When not using --large-memory, filtering using the largemem:skip tag is done automatically.

In addition, it is possible to specify additional configuration. For example, to run tests on a server that does not permit SYNC use:

./runtest --host <host> --port <port> --tags -needs:repl

2.8 KiB Raw Blame History

Redis Test Suite

Tags

2.8 KiB

Raw Blame History